Time all tasks (#361)

* Time all tasks

This is fairly high touch consisting of 3 things:
* Moving to Prometheus's Summary for timers
  * Timing at .2, .5, .8, .9, .99, and 1.0 (1.0 actually gets max I believe)
* Timing all abstract EthTasks
* The bulk of the changes: plumbing the timing context everywhere we need it

ethereum/eth/src/main/java/tech/pegasys/pantheon/ethereum/eth/manager/AbstractEthTask.java

@@ -12,6 +12,9 @@
  */
 package tech.pegasys.pantheon.ethereum.eth.manager;
 
+import tech.pegasys.pantheon.metrics.LabelledMetric;
+import tech.pegasys.pantheon.metrics.OperationTimer;
+
 import java.util.Collection;
 import java.util.concurrent.CancellationException;
 import java.util.concurrent.CompletableFuture;
@@ -22,14 +25,21 @@ import java.util.function.Supplier;
 
 public abstract class AbstractEthTask<T> implements EthTask<T> {
 
+  protected double taskTimeInSec = -1.0D;
+  protected OperationTimer taskTimer;
   protected final AtomicReference<CompletableFuture<T>> result = new AtomicReference<>();
   protected volatile Collection<CompletableFuture<?>> subTaskFutures =
       new ConcurrentLinkedDeque<>();
 
+  /** @param ethTasksTimer The metrics timer to use to time the duration of the task. */
+  protected AbstractEthTask(final LabelledMetric<OperationTimer> ethTasksTimer) {
+    taskTimer = ethTasksTimer.labels(getClass().getSimpleName());
+  }
+
   @Override
   public final CompletableFuture<T> run() {
     if (result.compareAndSet(null, new CompletableFuture<>())) {
-      executeTask();
+      executeTaskTimed();
       result
           .get()
           .whenComplete(
@@ -117,6 +127,20 @@ public abstract class AbstractEthTask<T> implements EthTask<T> {
   /** Execute core task logic. */
   protected abstract void executeTask();
 
+  /** Executes the task while timed by a timer. */
+  public void executeTaskTimed() {
+    final OperationTimer.TimingContext timingContext = taskTimer.startTimer();
+    try {
+      executeTask();
+    } finally {
+      taskTimeInSec = timingContext.stopTimer();
+    }
+  }
+
+  public double getTaskTimeInSec() {
+    return taskTimeInSec;
+  }
+
   /** Cleanup any resources when task completes. */
   protected void cleanup() {
     for (final CompletableFuture<?> subTaskFuture : subTaskFutures) {

ethereum/eth/src/main/java/tech/pegasys/pantheon/ethereum/eth/manager/AbstractPeerRequestTask.java

@@ -18,6 +18,8 @@ import tech.pegasys.pantheon.ethereum.p2p.api.MessageData;
 import tech.pegasys.pantheon.ethereum.p2p.api.PeerConnection.PeerNotConnected;
 import tech.pegasys.pantheon.ethereum.p2p.wire.messages.DisconnectMessage.DisconnectReason;
 import tech.pegasys.pantheon.ethereum.rlp.RLPException;
+import tech.pegasys.pantheon.metrics.LabelledMetric;
+import tech.pegasys.pantheon.metrics.OperationTimer;
 import tech.pegasys.pantheon.util.ExceptionUtils;
 
 import java.util.Optional;
@@ -29,8 +31,11 @@ public abstract class AbstractPeerRequestTask<R> extends AbstractPeerTask<R> {
   private final int requestCode;
   private volatile ResponseStream responseStream;
 
-  protected AbstractPeerRequestTask(final EthContext ethContext, final int requestCode) {
+  protected AbstractPeerRequestTask(
-    super(ethContext);
+      final EthContext ethContext,
+      final int requestCode,
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
+    super(ethContext, ethTasksTimer);
     this.requestCode = requestCode;
   }
 

ethereum/eth/src/main/java/tech/pegasys/pantheon/ethereum/eth/manager/AbstractPeerTask.java

@@ -16,6 +16,8 @@ import tech.pegasys.pantheon.ethereum.eth.manager.AbstractPeerTask.PeerTaskResul
 import tech.pegasys.pantheon.ethereum.eth.manager.exceptions.NoAvailablePeersException;
 import tech.pegasys.pantheon.ethereum.eth.manager.exceptions.PeerDisconnectedException;
 import tech.pegasys.pantheon.ethereum.p2p.api.PeerConnection.PeerNotConnected;
+import tech.pegasys.pantheon.metrics.LabelledMetric;
+import tech.pegasys.pantheon.metrics.OperationTimer;
 
 import java.util.Optional;
 
@@ -23,7 +25,9 @@ public abstract class AbstractPeerTask<R> extends AbstractEthTask<PeerTaskResult
   protected Optional<EthPeer> assignedPeer = Optional.empty();
   protected final EthContext ethContext;
 
-  protected AbstractPeerTask(final EthContext ethContext) {
+  protected AbstractPeerTask(
+      final EthContext ethContext, final LabelledMetric<OperationTimer> ethTasksTimer) {
+    super(ethTasksTimer);
     this.ethContext = ethContext;
   }
 

ethereum/eth/src/main/java/tech/pegasys/pantheon/ethereum/eth/manager/AbstractRetryingPeerTask.java

@@ -15,6 +15,8 @@ package tech.pegasys.pantheon.ethereum.eth.manager;
 import tech.pegasys.pantheon.ethereum.eth.manager.exceptions.MaxRetriesReachedException;
 import tech.pegasys.pantheon.ethereum.eth.manager.exceptions.NoAvailablePeersException;
 import tech.pegasys.pantheon.ethereum.eth.sync.tasks.WaitForPeerTask;
+import tech.pegasys.pantheon.metrics.LabelledMetric;
+import tech.pegasys.pantheon.metrics.OperationTimer;
 import tech.pegasys.pantheon.util.ExceptionUtils;
 
 import java.time.Duration;
@@ -37,13 +39,20 @@ public abstract class AbstractRetryingPeerTask<T extends Collection<?>> extends
   private final EthContext ethContext;
   private final int maxRetries;
   private int retryCount = 0;
+  private final LabelledMetric<OperationTimer> ethTasksTimer;
 
   /**
    * @param ethContext The context of the current Eth network we are attached to.
    * @param maxRetries Maximum number of retries to accept before completing exceptionally.
+   * @param ethTasksTimer The metrics timer to use to time the duration of the task.
    */
-  public AbstractRetryingPeerTask(final EthContext ethContext, final int maxRetries) {
+  public AbstractRetryingPeerTask(
+      final EthContext ethContext,
+      final int maxRetries,
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
+    super(ethTasksTimer);
     this.ethContext = ethContext;
+    this.ethTasksTimer = ethTasksTimer;
     this.maxRetries = maxRetries;
   }
 
@@ -69,7 +78,7 @@ public abstract class AbstractRetryingPeerTask<T extends Collection<?>> extends
                 if (peerResult.size() > 0) {
                   retryCount = 0;
                 }
-                executeTask();
+                executeTaskTimed();
               }
             });
   }
@@ -87,13 +96,13 @@ public abstract class AbstractRetryingPeerTask<T extends Collection<?>> extends
     if (cause instanceof NoAvailablePeersException) {
       LOG.info("No peers available, wait for peer.");
       // Wait for new peer to connect
-      final WaitForPeerTask waitTask = WaitForPeerTask.create(ethContext);
+      final WaitForPeerTask waitTask = WaitForPeerTask.create(ethContext, ethTasksTimer);
       executeSubTask(
           () ->
               ethContext
                   .getScheduler()
                   .timeout(waitTask, Duration.ofSeconds(5))
-                  .whenComplete((r, t) -> executeTask()));
+                  .whenComplete((r, t) -> executeTaskTimed()));
       return;
     }
 
@@ -104,7 +113,9 @@ public abstract class AbstractRetryingPeerTask<T extends Collection<?>> extends
     // Wait before retrying on failure
     executeSubTask(
         () ->
-            ethContext.getScheduler().scheduleFutureTask(this::executeTask, Duration.ofSeconds(1)));
+            ethContext
+                .getScheduler()
+                .scheduleFutureTask(this::executeTaskTimed, Duration.ofSeconds(1)));
   }
 
   protected abstract boolean isRetryableError(Throwable error);

ethereum/eth/src/main/java/tech/pegasys/pantheon/ethereum/eth/sync/BlockPropagationManager.java

@@ -34,8 +34,7 @@ import tech.pegasys.pantheon.ethereum.mainnet.HeaderValidationMode;
 import tech.pegasys.pantheon.ethereum.mainnet.ProtocolSchedule;
 import tech.pegasys.pantheon.ethereum.p2p.wire.messages.DisconnectMessage.DisconnectReason;
 import tech.pegasys.pantheon.ethereum.rlp.RLPException;
-import tech.pegasys.pantheon.metrics.MetricCategory;
+import tech.pegasys.pantheon.metrics.LabelledMetric;
-import tech.pegasys.pantheon.metrics.MetricsSystem;
 import tech.pegasys.pantheon.metrics.OperationTimer;
 import tech.pegasys.pantheon.util.uint.UInt256;
 
@@ -62,12 +61,12 @@ public class BlockPropagationManager<C> {
   private final ProtocolContext<C> protocolContext;
   private final EthContext ethContext;
   private final SyncState syncState;
+  private final LabelledMetric<OperationTimer> ethTasksTimer;
 
   private final AtomicBoolean started = new AtomicBoolean(false);
 
   private final Set<Hash> requestedBlocks = new ConcurrentSet<>();
   private final PendingBlocks pendingBlocks;
-  private final OperationTimer announcedBlockIngestTimer;
 
   BlockPropagationManager(
       final SynchronizerConfiguration config,
@@ -76,20 +75,15 @@ public class BlockPropagationManager<C> {
       final EthContext ethContext,
       final SyncState syncState,
       final PendingBlocks pendingBlocks,
-      final MetricsSystem metricsSystem) {
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
     this.config = config;
     this.protocolSchedule = protocolSchedule;
     this.protocolContext = protocolContext;
     this.ethContext = ethContext;
+    this.ethTasksTimer = ethTasksTimer;
 
     this.syncState = syncState;
     this.pendingBlocks = pendingBlocks;
-
-    this.announcedBlockIngestTimer =
-        metricsSystem.createTimer(
-            MetricCategory.BLOCKCHAIN,
-            "pantheon_blockchain_announcedBlock_ingest",
-            "Time to ingest a single announced block");
   }
 
   public void start() {
@@ -125,7 +119,11 @@ public class BlockPropagationManager<C> {
     if (!readyForImport.isEmpty()) {
       final Supplier<CompletableFuture<List<Block>>> importBlocksTask =
           PersistBlockTask.forUnorderedBlocks(
-              protocolSchedule, protocolContext, readyForImport, HeaderValidationMode.FULL);
+              protocolSchedule,
+              protocolContext,
+              readyForImport,
+              HeaderValidationMode.FULL,
+              ethTasksTimer);
       ethContext
           .getScheduler()
           .scheduleSyncWorkerTask(importBlocksTask)
@@ -225,7 +223,8 @@ public class BlockPropagationManager<C> {
   private CompletableFuture<Block> processAnnouncedBlock(
       final EthPeer peer, final NewBlockHash newBlock) {
     final AbstractPeerTask<Block> getBlockTask =
-        GetBlockFromPeerTask.create(protocolSchedule, ethContext, newBlock.hash()).assignPeer(peer);
+        GetBlockFromPeerTask.create(protocolSchedule, ethContext, newBlock.hash(), ethTasksTimer)
+            .assignPeer(peer);
 
     return getBlockTask.run().thenCompose((r) -> importOrSavePendingBlock(r.getResult()));
   }
@@ -251,8 +250,7 @@ public class BlockPropagationManager<C> {
     // Import block
     final PersistBlockTask<C> importTask =
         PersistBlockTask.create(
-            protocolSchedule, protocolContext, block, HeaderValidationMode.FULL);
+            protocolSchedule, protocolContext, block, HeaderValidationMode.FULL, ethTasksTimer);
-    final OperationTimer.TimingContext blockTimer = announcedBlockIngestTimer.startTimer();
     return ethContext
         .getScheduler()
         .scheduleSyncWorkerTask(importTask::run)
@@ -265,7 +263,7 @@ public class BlockPropagationManager<C> {
                     block.getHeader().getNumber(),
                     block.getHash());
               } else {
-                final double timeInMs = blockTimer.stopTimer() * 1000;
+                final double timeInMs = importTask.getTaskTimeInSec() * 1000;
                 LOG.info(
                     String.format(
                         "Successfully imported announced block %d (%s) in %01.3fms.",

ethereum/eth/src/main/java/tech/pegasys/pantheon/ethereum/eth/sync/ChainHeadTracker.java

@@ -23,6 +23,8 @@ import tech.pegasys.pantheon.ethereum.eth.manager.EthPeers.ConnectCallback;
 import tech.pegasys.pantheon.ethereum.eth.sync.tasks.GetHeadersFromPeerByHashTask;
 import tech.pegasys.pantheon.ethereum.mainnet.ProtocolSchedule;
 import tech.pegasys.pantheon.ethereum.p2p.wire.messages.DisconnectMessage.DisconnectReason;
+import tech.pegasys.pantheon.metrics.LabelledMetric;
+import tech.pegasys.pantheon.metrics.OperationTimer;
 
 import org.apache.logging.log4j.Logger;
 
@@ -33,21 +35,25 @@ public class ChainHeadTracker implements ConnectCallback {
   private final EthContext ethContext;
   private final ProtocolSchedule<?> protocolSchedule;
   private final TrailingPeerLimiter trailingPeerLimiter;
+  private final LabelledMetric<OperationTimer> ethTasksTimer;
 
   public ChainHeadTracker(
       final EthContext ethContext,
       final ProtocolSchedule<?> protocolSchedule,
-      final TrailingPeerLimiter trailingPeerLimiter) {
+      final TrailingPeerLimiter trailingPeerLimiter,
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
     this.ethContext = ethContext;
     this.protocolSchedule = protocolSchedule;
     this.trailingPeerLimiter = trailingPeerLimiter;
+    this.ethTasksTimer = ethTasksTimer;
   }
 
   public static void trackChainHeadForPeers(
       final EthContext ethContext,
       final ProtocolSchedule<?> protocolSchedule,
       final Blockchain blockchain,
-      final SynchronizerConfiguration syncConfiguration) {
+      final SynchronizerConfiguration syncConfiguration,
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
     final TrailingPeerLimiter trailingPeerLimiter =
         new TrailingPeerLimiter(
             ethContext.getEthPeers(),
@@ -55,7 +61,7 @@ public class ChainHeadTracker implements ConnectCallback {
             syncConfiguration.trailingPeerBlocksBehindThreshold(),
             syncConfiguration.maxTrailingPeers());
     final ChainHeadTracker tracker =
-        new ChainHeadTracker(ethContext, protocolSchedule, trailingPeerLimiter);
+        new ChainHeadTracker(ethContext, protocolSchedule, trailingPeerLimiter, ethTasksTimer);
     ethContext.getEthPeers().subscribeConnect(tracker);
     blockchain.observeBlockAdded(trailingPeerLimiter);
   }
@@ -64,7 +70,10 @@ public class ChainHeadTracker implements ConnectCallback {
   public void onPeerConnected(final EthPeer peer) {
     LOG.debug("Requesting chain head info for {}", peer);
     GetHeadersFromPeerByHashTask.forSingleHash(
-            protocolSchedule, ethContext, Hash.wrap(peer.chainState().getBestBlock().getHash()))
+            protocolSchedule,
+            ethContext,
+            Hash.wrap(peer.chainState().getBestBlock().getHash()),
+            ethTasksTimer)
         .assignPeer(peer)
         .run()
         .whenComplete(

ethereum/eth/src/main/java/tech/pegasys/pantheon/ethereum/eth/sync/DefaultSynchronizer.java

@@ -19,7 +19,8 @@ import tech.pegasys.pantheon.ethereum.eth.manager.EthContext;
 import tech.pegasys.pantheon.ethereum.eth.sync.state.PendingBlocks;
 import tech.pegasys.pantheon.ethereum.eth.sync.state.SyncState;
 import tech.pegasys.pantheon.ethereum.mainnet.ProtocolSchedule;
-import tech.pegasys.pantheon.metrics.MetricsSystem;
+import tech.pegasys.pantheon.metrics.LabelledMetric;
+import tech.pegasys.pantheon.metrics.OperationTimer;
 
 import java.util.Optional;
 import java.util.concurrent.atomic.AtomicBoolean;
@@ -42,7 +43,7 @@ public class DefaultSynchronizer<C> implements Synchronizer {
       final ProtocolContext<C> protocolContext,
       final EthContext ethContext,
       final SyncState syncState,
-      final MetricsSystem metricsSystem) {
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
     this.syncState = syncState;
     this.blockPropagationManager =
         new BlockPropagationManager<>(
@@ -52,12 +53,13 @@ public class DefaultSynchronizer<C> implements Synchronizer {
             ethContext,
             syncState,
             new PendingBlocks(),
-            metricsSystem);
+            ethTasksTimer);
     this.downloader =
-        new Downloader<>(syncConfig, protocolSchedule, protocolContext, ethContext, syncState);
+        new Downloader<>(
+            syncConfig, protocolSchedule, protocolContext, ethContext, syncState, ethTasksTimer);
 
     ChainHeadTracker.trackChainHeadForPeers(
-        ethContext, protocolSchedule, protocolContext.getBlockchain(), syncConfig);
+        ethContext, protocolSchedule, protocolContext.getBlockchain(), syncConfig, ethTasksTimer);
     if (syncConfig.syncMode().equals(SyncMode.FAST)) {
       LOG.info("Fast sync enabled.");
     }

ethereum/eth/src/main/java/tech/pegasys/pantheon/ethereum/eth/sync/Downloader.java

@@ -33,6 +33,8 @@ import tech.pegasys.pantheon.ethereum.eth.sync.tasks.WaitForPeersTask;
 import tech.pegasys.pantheon.ethereum.eth.sync.tasks.exceptions.InvalidBlockException;
 import tech.pegasys.pantheon.ethereum.mainnet.ProtocolSchedule;
 import tech.pegasys.pantheon.ethereum.p2p.wire.messages.DisconnectMessage.DisconnectReason;
+import tech.pegasys.pantheon.metrics.LabelledMetric;
+import tech.pegasys.pantheon.metrics.OperationTimer;
 import tech.pegasys.pantheon.util.ExceptionUtils;
 import tech.pegasys.pantheon.util.uint.UInt256;
 
@@ -60,6 +62,7 @@ public class Downloader<C> {
   private final ProtocolContext<C> protocolContext;
   private final EthContext ethContext;
   private final SyncState syncState;
+  private final LabelledMetric<OperationTimer> ethTasksTimer;
 
   private final Deque<BlockHeader> checkpointHeaders = new ConcurrentLinkedDeque<>();
   private int checkpointTimeouts = 0;
@@ -75,7 +78,9 @@ public class Downloader<C> {
       final ProtocolSchedule<C> protocolSchedule,
       final ProtocolContext<C> protocolContext,
       final EthContext ethContext,
-      final SyncState syncState) {
+      final SyncState syncState,
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
+    this.ethTasksTimer = ethTasksTimer;
     this.config = config;
     this.protocolSchedule = protocolSchedule;
     this.protocolContext = protocolContext;
@@ -124,13 +129,13 @@ public class Downloader<C> {
   }
 
   private CompletableFuture<?> waitForPeers() {
-    return WaitForPeersTask.create(ethContext, 1).run();
+    return WaitForPeersTask.create(ethContext, 1, ethTasksTimer).run();
   }
 
   private CompletableFuture<?> waitForNewPeer() {
     return ethContext
         .getScheduler()
-        .timeout(WaitForPeerTask.create(ethContext), Duration.ofSeconds(5));
+        .timeout(WaitForPeerTask.create(ethContext, ethTasksTimer), Duration.ofSeconds(5));
   }
 
   private CompletableFuture<SyncTarget> findSyncTarget() {
@@ -159,7 +164,8 @@ public class Downloader<C> {
               protocolContext,
               ethContext,
               bestPeer,
-              config.downloaderHeaderRequestSize())
+              config.downloaderHeaderRequestSize(),
+              ethTasksTimer)
           .run()
           .handle((r, t) -> r)
           .thenCompose(
@@ -325,7 +331,8 @@ public class Downloader<C> {
             lastHeader.getHash(),
             lastHeader.getNumber(),
             config.downloaderHeaderRequestSize() + 1,
-            config.downloaderChainSegmentSize() - 1)
+            config.downloaderChainSegmentSize() - 1,
+            ethTasksTimer)
         .assignPeer(syncTarget.peer());
   }
 
@@ -344,7 +351,8 @@ public class Downloader<C> {
               protocolContext,
               ethContext,
               checkpointHeaders.getFirst(),
-              config.downloaderChainSegmentSize());
+              config.downloaderChainSegmentSize(),
+              ethTasksTimer);
       importedBlocks = importTask.run().thenApply(PeerTaskResult::getResult);
     } else {
       final PipelinedImportChainSegmentTask<C> importTask =
@@ -353,6 +361,7 @@ public class Downloader<C> {
               protocolContext,
               ethContext,
               config.downloaderParallelism(),
+              ethTasksTimer,
               Lists.newArrayList(checkpointHeaders));
       importedBlocks = importTask.run();
     }

ethereum/eth/src/main/java/tech/pegasys/pantheon/ethereum/eth/sync/tasks/AbstractGetHeadersFromPeerTask.java

@@ -22,6 +22,8 @@ import tech.pegasys.pantheon.ethereum.eth.messages.BlockHeadersMessage;
 import tech.pegasys.pantheon.ethereum.eth.messages.EthPV62;
 import tech.pegasys.pantheon.ethereum.mainnet.ProtocolSchedule;
 import tech.pegasys.pantheon.ethereum.p2p.api.MessageData;
+import tech.pegasys.pantheon.metrics.LabelledMetric;
+import tech.pegasys.pantheon.metrics.OperationTimer;
 
 import java.util.ArrayList;
 import java.util.Collections;
@@ -50,8 +52,9 @@ public abstract class AbstractGetHeadersFromPeerTask
       final long minimumRequiredBlockNumber,
       final int count,
       final int skip,
-      final boolean reverse) {
+      final boolean reverse,
-    super(ethContext, EthPV62.GET_BLOCK_HEADERS);
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
+    super(ethContext, EthPV62.GET_BLOCK_HEADERS, ethTasksTimer);
     checkArgument(count > 0);
     this.protocolSchedule = protocolSchedule;
     this.count = count;

ethereum/eth/src/main/java/tech/pegasys/pantheon/ethereum/eth/sync/tasks/CompleteBlocksTask.java

@@ -24,6 +24,8 @@ import tech.pegasys.pantheon.ethereum.eth.manager.exceptions.NoAvailablePeersExc
 import tech.pegasys.pantheon.ethereum.eth.manager.exceptions.PeerBreachedProtocolException;
 import tech.pegasys.pantheon.ethereum.eth.manager.exceptions.PeerDisconnectedException;
 import tech.pegasys.pantheon.ethereum.mainnet.ProtocolSchedule;
+import tech.pegasys.pantheon.metrics.LabelledMetric;
+import tech.pegasys.pantheon.metrics.OperationTimer;
 
 import java.util.HashMap;
 import java.util.List;
@@ -48,6 +50,7 @@ public class CompleteBlocksTask<C> extends AbstractRetryingPeerTask<List<Block>>
 
   private final EthContext ethContext;
   private final ProtocolSchedule<C> protocolSchedule;
+  private final LabelledMetric<OperationTimer> ethTasksTimer;
 
   private final List<BlockHeader> headers;
   private final Map<Long, Block> blocks;
@@ -57,11 +60,13 @@ public class CompleteBlocksTask<C> extends AbstractRetryingPeerTask<List<Block>>
       final ProtocolSchedule<C> protocolSchedule,
       final EthContext ethContext,
       final List<BlockHeader> headers,
-      final int maxRetries) {
+      final int maxRetries,
-    super(ethContext, maxRetries);
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
+    super(ethContext, maxRetries, ethTasksTimer);
     checkArgument(headers.size() > 0, "Must supply a non-empty headers list");
     this.protocolSchedule = protocolSchedule;
     this.ethContext = ethContext;
+    this.ethTasksTimer = ethTasksTimer;
 
     this.headers = headers;
     this.blocks = new HashMap<>();
@@ -71,15 +76,19 @@ public class CompleteBlocksTask<C> extends AbstractRetryingPeerTask<List<Block>>
       final ProtocolSchedule<C> protocolSchedule,
       final EthContext ethContext,
       final List<BlockHeader> headers,
-      final int maxRetries) {
+      final int maxRetries,
-    return new CompleteBlocksTask<>(protocolSchedule, ethContext, headers, maxRetries);
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
+    return new CompleteBlocksTask<>(
+        protocolSchedule, ethContext, headers, maxRetries, ethTasksTimer);
   }
 
   public static <C> CompleteBlocksTask<C> forHeaders(
       final ProtocolSchedule<C> protocolSchedule,
       final EthContext ethContext,
-      final List<BlockHeader> headers) {
+      final List<BlockHeader> headers,
-    return new CompleteBlocksTask<>(protocolSchedule, ethContext, headers, DEFAULT_RETRIES);
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
+    return new CompleteBlocksTask<>(
+        protocolSchedule, ethContext, headers, DEFAULT_RETRIES, ethTasksTimer);
   }
 
   @Override
@@ -111,7 +120,8 @@ public class CompleteBlocksTask<C> extends AbstractRetryingPeerTask<List<Block>>
     return executeSubTask(
         () -> {
           final GetBodiesFromPeerTask<C> task =
-              GetBodiesFromPeerTask.forHeaders(protocolSchedule, ethContext, incompleteHeaders);
+              GetBodiesFromPeerTask.forHeaders(
+                  protocolSchedule, ethContext, incompleteHeaders, ethTasksTimer);
           assignedPeer.ifPresent(task::assignPeer);
           return task.run();
         });

ethereum/eth/src/main/java/tech/pegasys/pantheon/ethereum/eth/sync/tasks/DetermineCommonAncestorTask.java

@@ -20,6 +20,8 @@ import tech.pegasys.pantheon.ethereum.eth.manager.EthContext;
 import tech.pegasys.pantheon.ethereum.eth.manager.EthPeer;
 import tech.pegasys.pantheon.ethereum.mainnet.ProtocolSchedule;
 import tech.pegasys.pantheon.ethereum.util.BlockchainUtil;
+import tech.pegasys.pantheon.metrics.LabelledMetric;
+import tech.pegasys.pantheon.metrics.OperationTimer;
 
 import java.util.List;
 import java.util.OptionalInt;
@@ -34,6 +36,7 @@ public class DetermineCommonAncestorTask<C> extends AbstractEthTask<BlockHeader>
   private final EthContext ethContext;
   private final ProtocolSchedule<C> protocolSchedule;
   private final ProtocolContext<C> protocolContext;
+  private final LabelledMetric<OperationTimer> ethTasksTimer;
   private final EthPeer peer;
   private final int headerRequestSize;
 
@@ -47,10 +50,13 @@ public class DetermineCommonAncestorTask<C> extends AbstractEthTask<BlockHeader>
       final ProtocolContext<C> protocolContext,
       final EthContext ethContext,
       final EthPeer peer,
-      final int headerRequestSize) {
+      final int headerRequestSize,
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
+    super(ethTasksTimer);
     this.protocolSchedule = protocolSchedule;
     this.ethContext = ethContext;
     this.protocolContext = protocolContext;
+    this.ethTasksTimer = ethTasksTimer;
     this.peer = peer;
     this.headerRequestSize = headerRequestSize;
 
@@ -65,9 +71,10 @@ public class DetermineCommonAncestorTask<C> extends AbstractEthTask<BlockHeader>
       final ProtocolContext<C> protocolContext,
       final EthContext ethContext,
       final EthPeer peer,
-      final int headerRequestSize) {
+      final int headerRequestSize,
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
     return new DetermineCommonAncestorTask<>(
-        protocolSchedule, protocolContext, ethContext, peer, headerRequestSize);
+        protocolSchedule, protocolContext, ethContext, peer, headerRequestSize, ethTasksTimer);
   }
 
   @Override
@@ -89,7 +96,7 @@ public class DetermineCommonAncestorTask<C> extends AbstractEthTask<BlockHeader>
               if (error != null) {
                 result.get().completeExceptionally(error);
               } else if (!result.get().isDone()) {
-                executeTask();
+                executeTaskTimed();
               }
             });
   }
@@ -112,7 +119,8 @@ public class DetermineCommonAncestorTask<C> extends AbstractEthTask<BlockHeader>
                     ethContext,
                     maximumPossibleCommonAncestorNumber,
                     count,
-                    skipInterval)
+                    skipInterval,
+                    ethTasksTimer)
                 .assignPeer(peer)
                 .run());
   }

ethereum/eth/src/main/java/tech/pegasys/pantheon/ethereum/eth/sync/tasks/DownloadHeaderSequenceTask.java

@@ -29,6 +29,8 @@ import tech.pegasys.pantheon.ethereum.mainnet.BlockHeaderValidator;
 import tech.pegasys.pantheon.ethereum.mainnet.ProtocolSchedule;
 import tech.pegasys.pantheon.ethereum.mainnet.ProtocolSpec;
 import tech.pegasys.pantheon.ethereum.p2p.wire.messages.DisconnectMessage.DisconnectReason;
+import tech.pegasys.pantheon.metrics.LabelledMetric;
+import tech.pegasys.pantheon.metrics.OperationTimer;
 
 import java.util.Arrays;
 import java.util.List;
@@ -52,6 +54,7 @@ public class DownloadHeaderSequenceTask<C> extends AbstractRetryingPeerTask<List
   private final EthContext ethContext;
   private final ProtocolContext<C> protocolContext;
   private final ProtocolSchedule<C> protocolSchedule;
+  private final LabelledMetric<OperationTimer> ethTasksTimer;
 
   private final BlockHeader[] headers;
   private final BlockHeader referenceHeader;
@@ -66,13 +69,15 @@ public class DownloadHeaderSequenceTask<C> extends AbstractRetryingPeerTask<List
       final EthContext ethContext,
       final BlockHeader referenceHeader,
       final int segmentLength,
-      final int maxRetries) {
+      final int maxRetries,
-    super(ethContext, maxRetries);
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
+    super(ethContext, maxRetries, ethTasksTimer);
     this.protocolSchedule = protocolSchedule;
     this.protocolContext = protocolContext;
     this.ethContext = ethContext;
     this.referenceHeader = referenceHeader;
     this.segmentLength = segmentLength;
+    this.ethTasksTimer = ethTasksTimer;
 
     startingBlockNumber = referenceHeader.getNumber() - segmentLength;
     headers = new BlockHeader[segmentLength];
@@ -85,9 +90,16 @@ public class DownloadHeaderSequenceTask<C> extends AbstractRetryingPeerTask<List
       final EthContext ethContext,
       final BlockHeader referenceHeader,
       final int segmentLength,
-      final int maxRetries) {
+      final int maxRetries,
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
     return new DownloadHeaderSequenceTask<>(
-        protocolSchedule, protocolContext, ethContext, referenceHeader, segmentLength, maxRetries);
+        protocolSchedule,
+        protocolContext,
+        ethContext,
+        referenceHeader,
+        segmentLength,
+        maxRetries,
+        ethTasksTimer);
   }
 
   public static <C> DownloadHeaderSequenceTask<C> endingAtHeader(
@@ -95,14 +107,16 @@ public class DownloadHeaderSequenceTask<C> extends AbstractRetryingPeerTask<List
       final ProtocolContext<C> protocolContext,
       final EthContext ethContext,
       final BlockHeader referenceHeader,
-      final int segmentLength) {
+      final int segmentLength,
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
     return new DownloadHeaderSequenceTask<>(
         protocolSchedule,
         protocolContext,
         ethContext,
         referenceHeader,
         segmentLength,
-        DEFAULT_RETRIES);
+        DEFAULT_RETRIES,
+        ethTasksTimer);
   }
 
   @Override
@@ -149,7 +163,8 @@ public class DownloadHeaderSequenceTask<C> extends AbstractRetryingPeerTask<List
                   ethContext,
                   referenceHash,
                   referenceHeaderForNextRequest.getNumber(),
-                  count + 1);
+                  count + 1,
+                  ethTasksTimer);
           return headersTask.run();
         });
   }

ethereum/eth/src/main/java/tech/pegasys/pantheon/ethereum/eth/sync/tasks/GetBlockFromPeerTask.java

@@ -21,6 +21,8 @@ import tech.pegasys.pantheon.ethereum.eth.manager.EthPeer;
 import tech.pegasys.pantheon.ethereum.eth.manager.exceptions.IncompleteResultsException;
 import tech.pegasys.pantheon.ethereum.mainnet.ProtocolSchedule;
 import tech.pegasys.pantheon.ethereum.p2p.api.PeerConnection.PeerNotConnected;
+import tech.pegasys.pantheon.metrics.LabelledMetric;
+import tech.pegasys.pantheon.metrics.OperationTimer;
 
 import java.util.List;
 import java.util.concurrent.CompletableFuture;
@@ -33,18 +35,26 @@ public class GetBlockFromPeerTask extends AbstractPeerTask<Block> {
   private static final Logger LOG = LogManager.getLogger();
 
   private final ProtocolSchedule<?> protocolSchedule;
+  private final LabelledMetric<OperationTimer> ethTasksTimer;
   private final Hash hash;
 
   protected GetBlockFromPeerTask(
-      final ProtocolSchedule<?> protocolSchedule, final EthContext ethContext, final Hash hash) {
+      final ProtocolSchedule<?> protocolSchedule,
-    super(ethContext);
+      final EthContext ethContext,
+      final Hash hash,
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
+    super(ethContext, ethTasksTimer);
     this.protocolSchedule = protocolSchedule;
+    this.ethTasksTimer = ethTasksTimer;
     this.hash = hash;
   }
 
   public static GetBlockFromPeerTask create(
-      final ProtocolSchedule<?> protocolSchedule, final EthContext ethContext, final Hash hash) {
+      final ProtocolSchedule<?> protocolSchedule,
-    return new GetBlockFromPeerTask(protocolSchedule, ethContext, hash);
+      final EthContext ethContext,
+      final Hash hash,
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
+    return new GetBlockFromPeerTask(protocolSchedule, ethContext, hash, ethTasksTimer);
   }
 
   @Override
@@ -70,7 +80,8 @@ public class GetBlockFromPeerTask extends AbstractPeerTask<Block> {
   private CompletableFuture<PeerTaskResult<List<BlockHeader>>> downloadHeader(final EthPeer peer) {
     return executeSubTask(
         () ->
-            GetHeadersFromPeerByHashTask.forSingleHash(protocolSchedule, ethContext, hash)
+            GetHeadersFromPeerByHashTask.forSingleHash(
+                    protocolSchedule, ethContext, hash, ethTasksTimer)
                 .assignPeer(peer)
                 .run());
   }
@@ -87,7 +98,7 @@ public class GetBlockFromPeerTask extends AbstractPeerTask<Block> {
         () -> {
           final GetBodiesFromPeerTask<?> task =
               GetBodiesFromPeerTask.forHeaders(
-                  protocolSchedule, ethContext, headerResult.getResult());
+                  protocolSchedule, ethContext, headerResult.getResult(), ethTasksTimer);
           task.assignPeer(headerResult.getPeer());
           return task.run();
         });

ethereum/eth/src/main/java/tech/pegasys/pantheon/ethereum/eth/sync/tasks/GetBodiesFromPeerTask.java

@@ -29,6 +29,8 @@ import tech.pegasys.pantheon.ethereum.mainnet.BodyValidation;
 import tech.pegasys.pantheon.ethereum.mainnet.ProtocolSchedule;
 import tech.pegasys.pantheon.ethereum.p2p.api.MessageData;
 import tech.pegasys.pantheon.ethereum.p2p.api.PeerConnection.PeerNotConnected;
+import tech.pegasys.pantheon.metrics.LabelledMetric;
+import tech.pegasys.pantheon.metrics.OperationTimer;
 import tech.pegasys.pantheon.util.bytes.Bytes32;
 
 import java.util.ArrayList;
@@ -59,8 +61,9 @@ public class GetBodiesFromPeerTask<C> extends AbstractPeerRequestTask<List<Block
   private GetBodiesFromPeerTask(
       final ProtocolSchedule<C> protocolSchedule,
       final EthContext ethContext,
-      final List<BlockHeader> headers) {
+      final List<BlockHeader> headers,
-    super(ethContext, EthPV62.GET_BLOCK_BODIES);
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
+    super(ethContext, EthPV62.GET_BLOCK_BODIES, ethTasksTimer);
     checkArgument(headers.size() > 0);
     this.protocolSchedule = protocolSchedule;
 
@@ -76,8 +79,9 @@ public class GetBodiesFromPeerTask<C> extends AbstractPeerRequestTask<List<Block
   public static <C> GetBodiesFromPeerTask<C> forHeaders(
       final ProtocolSchedule<C> protocolSchedule,
       final EthContext ethContext,
-      final List<BlockHeader> headers) {
+      final List<BlockHeader> headers,
-    return new GetBodiesFromPeerTask<>(protocolSchedule, ethContext, headers);
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
+    return new GetBodiesFromPeerTask<>(protocolSchedule, ethContext, headers, ethTasksTimer);
   }
 
   @Override

ethereum/eth/src/main/java/tech/pegasys/pantheon/ethereum/eth/sync/tasks/GetHeadersFromPeerByHashTask.java

@@ -21,6 +21,8 @@ import tech.pegasys.pantheon.ethereum.eth.manager.EthPeer;
 import tech.pegasys.pantheon.ethereum.eth.manager.RequestManager.ResponseStream;
 import tech.pegasys.pantheon.ethereum.mainnet.ProtocolSchedule;
 import tech.pegasys.pantheon.ethereum.p2p.api.PeerConnection.PeerNotConnected;
+import tech.pegasys.pantheon.metrics.LabelledMetric;
+import tech.pegasys.pantheon.metrics.OperationTimer;
 
 import com.google.common.annotations.VisibleForTesting;
 import org.apache.logging.log4j.LogManager;
@@ -40,8 +42,16 @@ public class GetHeadersFromPeerByHashTask extends AbstractGetHeadersFromPeerTask
       final long minimumRequiredBlockNumber,
       final int count,
       final int skip,
-      final boolean reverse) {
+      final boolean reverse,
-    super(protocolSchedule, ethContext, minimumRequiredBlockNumber, count, skip, reverse);
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
+    super(
+        protocolSchedule,
+        ethContext,
+        minimumRequiredBlockNumber,
+        count,
+        skip,
+        reverse,
+        ethTasksTimer);
     checkNotNull(referenceHash);
     this.referenceHash = referenceHash;
   }
@@ -51,9 +61,17 @@ public class GetHeadersFromPeerByHashTask extends AbstractGetHeadersFromPeerTask
       final EthContext ethContext,
       final Hash firstHash,
       final long firstBlockNumber,
-      final int segmentLength) {
+      final int segmentLength,
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
     return new GetHeadersFromPeerByHashTask(
-        protocolSchedule, ethContext, firstHash, firstBlockNumber, segmentLength, 0, false);
+        protocolSchedule,
+        ethContext,
+        firstHash,
+        firstBlockNumber,
+        segmentLength,
+        0,
+        false,
+        ethTasksTimer);
   }
 
   public static AbstractGetHeadersFromPeerTask startingAtHash(
@@ -62,9 +80,17 @@ public class GetHeadersFromPeerByHashTask extends AbstractGetHeadersFromPeerTask
       final Hash firstHash,
       final long firstBlockNumber,
       final int segmentLength,
-      final int skip) {
+      final int skip,
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
     return new GetHeadersFromPeerByHashTask(
-        protocolSchedule, ethContext, firstHash, firstBlockNumber, segmentLength, skip, false);
+        protocolSchedule,
+        ethContext,
+        firstHash,
+        firstBlockNumber,
+        segmentLength,
+        skip,
+        false,
+        ethTasksTimer);
   }
 
   public static AbstractGetHeadersFromPeerTask endingAtHash(
@@ -72,14 +98,26 @@ public class GetHeadersFromPeerByHashTask extends AbstractGetHeadersFromPeerTask
       final EthContext ethContext,
       final Hash lastHash,
       final long lastBlockNumber,
-      final int segmentLength) {
+      final int segmentLength,
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
     return new GetHeadersFromPeerByHashTask(
-        protocolSchedule, ethContext, lastHash, lastBlockNumber, segmentLength, 0, true);
+        protocolSchedule,
+        ethContext,
+        lastHash,
+        lastBlockNumber,
+        segmentLength,
+        0,
+        true,
+        ethTasksTimer);
   }
 
   public static AbstractGetHeadersFromPeerTask forSingleHash(
-      final ProtocolSchedule<?> protocolSchedule, final EthContext ethContext, final Hash hash) {
+      final ProtocolSchedule<?> protocolSchedule,
-    return new GetHeadersFromPeerByHashTask(protocolSchedule, ethContext, hash, 0, 1, 0, false);
+      final EthContext ethContext,
+      final Hash hash,
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
+    return new GetHeadersFromPeerByHashTask(
+        protocolSchedule, ethContext, hash, 0, 1, 0, false, ethTasksTimer);
   }
 
   @Override

ethereum/eth/src/main/java/tech/pegasys/pantheon/ethereum/eth/sync/tasks/GetHeadersFromPeerByNumberTask.java

@@ -18,6 +18,8 @@ import tech.pegasys.pantheon.ethereum.eth.manager.EthPeer;
 import tech.pegasys.pantheon.ethereum.eth.manager.RequestManager.ResponseStream;
 import tech.pegasys.pantheon.ethereum.mainnet.ProtocolSchedule;
 import tech.pegasys.pantheon.ethereum.p2p.api.PeerConnection.PeerNotConnected;
+import tech.pegasys.pantheon.metrics.LabelledMetric;
+import tech.pegasys.pantheon.metrics.OperationTimer;
 
 import com.google.common.annotations.VisibleForTesting;
 import org.apache.logging.log4j.LogManager;
@@ -36,8 +38,9 @@ public class GetHeadersFromPeerByNumberTask extends AbstractGetHeadersFromPeerTa
       final long blockNumber,
       final int count,
       final int skip,
-      final boolean reverse) {
+      final boolean reverse,
-    super(protocolSchedule, ethContext, blockNumber, count, skip, reverse);
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
+    super(protocolSchedule, ethContext, blockNumber, count, skip, reverse, ethTasksTimer);
     this.blockNumber = blockNumber;
   }
 
@@ -45,18 +48,20 @@ public class GetHeadersFromPeerByNumberTask extends AbstractGetHeadersFromPeerTa
       final ProtocolSchedule<?> protocolSchedule,
       final EthContext ethContext,
       final long firstBlockNumber,
-      final int segmentLength) {
+      final int segmentLength,
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
     return new GetHeadersFromPeerByNumberTask(
-        protocolSchedule, ethContext, firstBlockNumber, segmentLength, 0, false);
+        protocolSchedule, ethContext, firstBlockNumber, segmentLength, 0, false, ethTasksTimer);
   }
 
   public static AbstractGetHeadersFromPeerTask endingAtNumber(
       final ProtocolSchedule<?> protocolSchedule,
       final EthContext ethContext,
       final long lastlockNumber,
-      final int segmentLength) {
+      final int segmentLength,
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
     return new GetHeadersFromPeerByNumberTask(
-        protocolSchedule, ethContext, lastlockNumber, segmentLength, 0, true);
+        protocolSchedule, ethContext, lastlockNumber, segmentLength, 0, true, ethTasksTimer);
   }
 
   public static AbstractGetHeadersFromPeerTask endingAtNumber(
@@ -64,17 +69,19 @@ public class GetHeadersFromPeerByNumberTask extends AbstractGetHeadersFromPeerTa
       final EthContext ethContext,
       final long lastlockNumber,
       final int segmentLength,
-      final int skip) {
+      final int skip,
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
     return new GetHeadersFromPeerByNumberTask(
-        protocolSchedule, ethContext, lastlockNumber, segmentLength, skip, true);
+        protocolSchedule, ethContext, lastlockNumber, segmentLength, skip, true, ethTasksTimer);
   }
 
   public static AbstractGetHeadersFromPeerTask forSingleNumber(
       final ProtocolSchedule<?> protocolSchedule,
       final EthContext ethContext,
-      final long blockNumber) {
+      final long blockNumber,
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
     return new GetHeadersFromPeerByNumberTask(
-        protocolSchedule, ethContext, blockNumber, 1, 0, false);
+        protocolSchedule, ethContext, blockNumber, 1, 0, false, ethTasksTimer);
   }
 
   @Override

ethereum/eth/src/main/java/tech/pegasys/pantheon/ethereum/eth/sync/tasks/ImportBlocksTask.java

@@ -21,6 +21,8 @@ import tech.pegasys.pantheon.ethereum.eth.manager.EthPeer;
 import tech.pegasys.pantheon.ethereum.mainnet.HeaderValidationMode;
 import tech.pegasys.pantheon.ethereum.mainnet.ProtocolSchedule;
 import tech.pegasys.pantheon.ethereum.p2p.api.PeerConnection.PeerNotConnected;
+import tech.pegasys.pantheon.metrics.LabelledMetric;
+import tech.pegasys.pantheon.metrics.OperationTimer;
 
 import java.util.Collections;
 import java.util.List;
@@ -40,6 +42,7 @@ public class ImportBlocksTask<C> extends AbstractPeerTask<List<Block>> {
 
   private final ProtocolContext<C> protocolContext;
   private final ProtocolSchedule<C> protocolSchedule;
+  private final LabelledMetric<OperationTimer> ethTasksTimer;
   private final long startNumber;
 
   private final BlockHeader referenceHeader;
@@ -51,12 +54,14 @@ public class ImportBlocksTask<C> extends AbstractPeerTask<List<Block>> {
       final ProtocolContext<C> protocolContext,
       final EthContext ethContext,
       final BlockHeader referenceHeader,
-      final int maxBlocks) {
+      final int maxBlocks,
-    super(ethContext);
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
+    super(ethContext, ethTasksTimer);
     this.protocolSchedule = protocolSchedule;
     this.protocolContext = protocolContext;
     this.referenceHeader = referenceHeader;
     this.maxBlocks = maxBlocks;
+    this.ethTasksTimer = ethTasksTimer;
 
     this.startNumber = referenceHeader.getNumber();
   }
@@ -66,9 +71,10 @@ public class ImportBlocksTask<C> extends AbstractPeerTask<List<Block>> {
       final ProtocolContext<C> protocolContext,
       final EthContext ethContext,
       final BlockHeader previousHeader,
-      final int maxBlocks) {
+      final int maxBlocks,
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
     return new ImportBlocksTask<>(
-        protocolSchedule, protocolContext, ethContext, previousHeader, maxBlocks);
+        protocolSchedule, protocolContext, ethContext, previousHeader, maxBlocks, ethTasksTimer);
   }
 
   @Override
@@ -97,7 +103,8 @@ public class ImportBlocksTask<C> extends AbstractPeerTask<List<Block>> {
                 ethContext,
                 referenceHeader.getHash(),
                 referenceHeader.getNumber(),
-                maxBlocks)
+                maxBlocks,
+                ethTasksTimer)
             .assignPeer(peer);
     return executeSubTask(task::run);
   }
@@ -108,7 +115,8 @@ public class ImportBlocksTask<C> extends AbstractPeerTask<List<Block>> {
       return CompletableFuture.completedFuture(Collections.emptyList());
     }
     final CompleteBlocksTask<C> task =
-        CompleteBlocksTask.forHeaders(protocolSchedule, ethContext, headers.getResult())
+        CompleteBlocksTask.forHeaders(
+                protocolSchedule, ethContext, headers.getResult(), ethTasksTimer)
             .assignPeer(peer);
     return executeSubTask(() -> ethContext.getScheduler().timeout(task));
   }
@@ -123,7 +131,7 @@ public class ImportBlocksTask<C> extends AbstractPeerTask<List<Block>> {
     }
     final Supplier<CompletableFuture<List<Block>>> task =
         PersistBlockTask.forSequentialBlocks(
-            protocolSchedule, protocolContext, blocks, HeaderValidationMode.FULL);
+            protocolSchedule, protocolContext, blocks, HeaderValidationMode.FULL, ethTasksTimer);
     return executeWorkerSubTask(ethContext.getScheduler(), task);
   }
 }

ethereum/eth/src/main/java/tech/pegasys/pantheon/ethereum/eth/sync/tasks/PersistBlockTask.java

@@ -22,6 +22,8 @@ import tech.pegasys.pantheon.ethereum.eth.sync.tasks.exceptions.InvalidBlockExce
 import tech.pegasys.pantheon.ethereum.mainnet.HeaderValidationMode;
 import tech.pegasys.pantheon.ethereum.mainnet.ProtocolSchedule;
 import tech.pegasys.pantheon.ethereum.mainnet.ProtocolSpec;
+import tech.pegasys.pantheon.metrics.LabelledMetric;
+import tech.pegasys.pantheon.metrics.OperationTimer;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -39,7 +41,9 @@ public class PersistBlockTask<C> extends AbstractEthTask<Block> {
       final ProtocolSchedule<C> protocolSchedule,
       final ProtocolContext<C> protocolContext,
       final Block block,
-      final HeaderValidationMode headerValidationMode) {
+      final HeaderValidationMode headerValidationMode,
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
+    super(ethTasksTimer);
     this.protocolSchedule = protocolSchedule;
     this.protocolContext = protocolContext;
     this.block = block;
@@ -50,15 +54,18 @@ public class PersistBlockTask<C> extends AbstractEthTask<Block> {
       final ProtocolSchedule<C> protocolSchedule,
       final ProtocolContext<C> protocolContext,
       final Block block,
-      final HeaderValidationMode headerValidationMode) {
+      final HeaderValidationMode headerValidationMode,
-    return new PersistBlockTask<>(protocolSchedule, protocolContext, block, headerValidationMode);
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
+    return new PersistBlockTask<>(
+        protocolSchedule, protocolContext, block, headerValidationMode, ethTasksTimer);
   }
 
   public static <C> Supplier<CompletableFuture<List<Block>>> forSequentialBlocks(
       final ProtocolSchedule<C> protocolSchedule,
       final ProtocolContext<C> protocolContext,
       final List<Block> blocks,
-      final HeaderValidationMode headerValidationMode) {
+      final HeaderValidationMode headerValidationMode,
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
     checkArgument(blocks.size() > 0);
     return () -> {
       final List<Block> successfulImports = new ArrayList<>();
@@ -71,7 +78,8 @@ public class PersistBlockTask<C> extends AbstractEthTask<Block> {
                   protocolContext,
                   block,
                   successfulImports,
-                  headerValidationMode);
+                  headerValidationMode,
+                  ethTasksTimer);
           continue;
         }
         future =
@@ -82,7 +90,8 @@ public class PersistBlockTask<C> extends AbstractEthTask<Block> {
                         protocolContext,
                         block,
                         successfulImports,
-                        headerValidationMode));
+                        headerValidationMode,
+                        ethTasksTimer));
       }
       return future.thenApply(r -> successfulImports);
     };
@@ -93,8 +102,10 @@ public class PersistBlockTask<C> extends AbstractEthTask<Block> {
       final ProtocolContext<C> protocolContext,
       final Block block,
       final List<Block> list,
-      final HeaderValidationMode headerValidationMode) {
+      final HeaderValidationMode headerValidationMode,
-    return PersistBlockTask.create(protocolSchedule, protocolContext, block, headerValidationMode)
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
+    return PersistBlockTask.create(
+            protocolSchedule, protocolContext, block, headerValidationMode, ethTasksTimer)
         .run()
         .whenComplete(
             (r, t) -> {
@@ -108,7 +119,8 @@ public class PersistBlockTask<C> extends AbstractEthTask<Block> {
       final ProtocolSchedule<C> protocolSchedule,
       final ProtocolContext<C> protocolContext,
       final List<Block> blocks,
-      final HeaderValidationMode headerValidationMode) {
+      final HeaderValidationMode headerValidationMode,
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
     checkArgument(blocks.size() > 0);
     return () -> {
       final CompletableFuture<List<Block>> finalResult = new CompletableFuture<>();
@@ -118,7 +130,7 @@ public class PersistBlockTask<C> extends AbstractEthTask<Block> {
         if (future == null) {
           future =
               PersistBlockTask.create(
-                      protocolSchedule, protocolContext, block, headerValidationMode)
+                      protocolSchedule, protocolContext, block, headerValidationMode, ethTasksTimer)
                   .run();
           continue;
         }
@@ -131,7 +143,11 @@ public class PersistBlockTask<C> extends AbstractEthTask<Block> {
                         successfulImports.add(r);
                       }
                       return PersistBlockTask.create(
-                              protocolSchedule, protocolContext, block, headerValidationMode)
+                              protocolSchedule,
+                              protocolContext,
+                              block,
+                              headerValidationMode,
+                              ethTasksTimer)
                           .run();
                     });
       }

ethereum/eth/src/main/java/tech/pegasys/pantheon/ethereum/eth/sync/tasks/PipelinedImportChainSegmentTask.java

@@ -23,6 +23,8 @@ import tech.pegasys.pantheon.ethereum.mainnet.BlockHeaderValidator;
 import tech.pegasys.pantheon.ethereum.mainnet.HeaderValidationMode;
 import tech.pegasys.pantheon.ethereum.mainnet.ProtocolSchedule;
 import tech.pegasys.pantheon.ethereum.mainnet.ProtocolSpec;
+import tech.pegasys.pantheon.metrics.LabelledMetric;
+import tech.pegasys.pantheon.metrics.OperationTimer;
 import tech.pegasys.pantheon.util.ExceptionUtils;
 
 import java.util.ArrayList;
@@ -45,6 +47,7 @@ public class PipelinedImportChainSegmentTask<C> extends AbstractEthTask<List<Blo
   private final ProtocolContext<C> protocolContext;
   private final ProtocolSchedule<C> protocolSchedule;
   private final List<Block> importedBlocks = new ArrayList<>();
+  private final LabelledMetric<OperationTimer> ethTasksTimer;
 
   // First header is assumed  to already be imported
   private final List<BlockHeader> checkpointHeaders;
@@ -67,10 +70,13 @@ public class PipelinedImportChainSegmentTask<C> extends AbstractEthTask<List<Blo
       final ProtocolContext<C> protocolContext,
       final EthContext ethContext,
       final int maxActiveChunks,
-      final List<BlockHeader> checkpointHeaders) {
+      final List<BlockHeader> checkpointHeaders,
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
+    super(ethTasksTimer);
     this.protocolSchedule = protocolSchedule;
     this.protocolContext = protocolContext;
     this.ethContext = ethContext;
+    this.ethTasksTimer = ethTasksTimer;
     this.checkpointHeaders = checkpointHeaders;
     this.chunksInTotal = checkpointHeaders.size() - 1;
     this.chunksIssued = 0;
@@ -83,12 +89,14 @@ public class PipelinedImportChainSegmentTask<C> extends AbstractEthTask<List<Blo
       final ProtocolContext<C> protocolContext,
       final EthContext ethContext,
       final int maxActiveChunks,
+      final LabelledMetric<OperationTimer> ethTasksTimer,
       final BlockHeader... checkpointHeaders) {
     return forCheckpoints(
         protocolSchedule,
         protocolContext,
         ethContext,
         maxActiveChunks,
+        ethTasksTimer,
         Arrays.asList(checkpointHeaders));
   }
 
@@ -97,9 +105,15 @@ public class PipelinedImportChainSegmentTask<C> extends AbstractEthTask<List<Blo
       final ProtocolContext<C> protocolContext,
       final EthContext ethContext,
       final int maxActiveChunks,
+      final LabelledMetric<OperationTimer> ethTasksTimer,
       final List<BlockHeader> checkpointHeaders) {
     return new PipelinedImportChainSegmentTask<>(
-        protocolSchedule, protocolContext, ethContext, maxActiveChunks, checkpointHeaders);
+        protocolSchedule,
+        protocolContext,
+        ethContext,
+        maxActiveChunks,
+        checkpointHeaders,
+        ethTasksTimer);
   }
 
   @Override
@@ -195,7 +209,12 @@ public class PipelinedImportChainSegmentTask<C> extends AbstractEthTask<List<Blo
     }
     final DownloadHeaderSequenceTask<C> task =
         DownloadHeaderSequenceTask.endingAtHeader(
-            protocolSchedule, protocolContext, ethContext, lastChunkHeader, segmentLength);
+            protocolSchedule,
+            protocolContext,
+            ethContext,
+            lastChunkHeader,
+            segmentLength,
+            ethTasksTimer);
     return executeSubTask(task::run)
         .thenApply(
             headers -> {
@@ -239,7 +258,7 @@ public class PipelinedImportChainSegmentTask<C> extends AbstractEthTask<List<Blo
         headers.get(0).getNumber(),
         headers.get(headers.size() - 1).getNumber());
     final CompleteBlocksTask<C> task =
-        CompleteBlocksTask.forHeaders(protocolSchedule, ethContext, headers);
+        CompleteBlocksTask.forHeaders(protocolSchedule, ethContext, headers, ethTasksTimer);
     return executeSubTask(task::run);
   }
 
@@ -250,7 +269,11 @@ public class PipelinedImportChainSegmentTask<C> extends AbstractEthTask<List<Blo
         blocks.get(blocks.size() - 1).getHeader().getNumber());
     final Supplier<CompletableFuture<List<Block>>> task =
         PersistBlockTask.forSequentialBlocks(
-            protocolSchedule, protocolContext, blocks, HeaderValidationMode.SKIP_DETACHED);
+            protocolSchedule,
+            protocolContext,
+            blocks,
+            HeaderValidationMode.SKIP_DETACHED,
+            ethTasksTimer);
     return executeWorkerSubTask(ethContext.getScheduler(), task);
   }
 

ethereum/eth/src/main/java/tech/pegasys/pantheon/ethereum/eth/sync/tasks/WaitForPeerTask.java

@@ -15,6 +15,8 @@ package tech.pegasys.pantheon.ethereum.eth.sync.tasks;
 import tech.pegasys.pantheon.ethereum.eth.manager.AbstractEthTask;
 import tech.pegasys.pantheon.ethereum.eth.manager.EthContext;
 import tech.pegasys.pantheon.ethereum.eth.manager.EthPeers;
+import tech.pegasys.pantheon.metrics.LabelledMetric;
+import tech.pegasys.pantheon.metrics.OperationTimer;
 
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
@@ -26,12 +28,15 @@ public class WaitForPeerTask extends AbstractEthTask<Void> {
   private final EthContext ethContext;
   private volatile Long peerListenerId;
 
-  private WaitForPeerTask(final EthContext ethContext) {
+  private WaitForPeerTask(
+      final EthContext ethContext, final LabelledMetric<OperationTimer> ethTasksTimer) {
+    super(ethTasksTimer);
     this.ethContext = ethContext;
   }
 
-  public static WaitForPeerTask create(final EthContext ethContext) {
+  public static WaitForPeerTask create(
-    return new WaitForPeerTask(ethContext);
+      final EthContext ethContext, final LabelledMetric<OperationTimer> ethTasksTimer) {
+    return new WaitForPeerTask(ethContext, ethTasksTimer);
   }
 
   @Override

ethereum/eth/src/main/java/tech/pegasys/pantheon/ethereum/eth/sync/tasks/WaitForPeersTask.java

@@ -15,6 +15,8 @@ package tech.pegasys.pantheon.ethereum.eth.sync.tasks;
 import tech.pegasys.pantheon.ethereum.eth.manager.AbstractEthTask;
 import tech.pegasys.pantheon.ethereum.eth.manager.EthContext;
 import tech.pegasys.pantheon.ethereum.eth.manager.EthPeers;
+import tech.pegasys.pantheon.metrics.LabelledMetric;
+import tech.pegasys.pantheon.metrics.OperationTimer;
 
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
@@ -27,13 +29,20 @@ public class WaitForPeersTask extends AbstractEthTask<Void> {
   private final EthContext ethContext;
   private volatile Long peerListenerId;
 
-  private WaitForPeersTask(final EthContext ethContext, final int targetPeerCount) {
+  private WaitForPeersTask(
+      final EthContext ethContext,
+      final int targetPeerCount,
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
+    super(ethTasksTimer);
     this.targetPeerCount = targetPeerCount;
     this.ethContext = ethContext;
   }
 
-  public static WaitForPeersTask create(final EthContext ethContext, final int targetPeerCount) {
+  public static WaitForPeersTask create(
-    return new WaitForPeersTask(ethContext, targetPeerCount);
+      final EthContext ethContext,
+      final int targetPeerCount,
+      final LabelledMetric<OperationTimer> ethTasksTimer) {
+    return new WaitForPeersTask(ethContext, targetPeerCount, ethTasksTimer);
   }
 
   @Override

ethereum/eth/src/test/java/tech/pegasys/pantheon/ethereum/eth/manager/AbstractEthTaskTest.java

@@ -14,6 +14,8 @@ package tech.pegasys.pantheon.ethereum.eth.manager;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
+import tech.pegasys.pantheon.metrics.noop.NoOpMetricsSystem;
+
 import java.util.List;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.atomic.AtomicBoolean;
@@ -81,6 +83,7 @@ public class AbstractEthTaskTest {
     private final List<CompletableFuture<?>> subtasks;
 
     private EthTaskWithMultipleSubtasks(final List<CompletableFuture<?>> subtasks) {
+      super(NoOpMetricsSystem.NO_OP_LABELLED_TIMER);
       this.subtasks = subtasks;
     }
 

ethereum/eth/src/test/java/tech/pegasys/pantheon/ethereum/eth/manager/MockEthTask.java

@@ -12,10 +12,16 @@
  */
 package tech.pegasys.pantheon.ethereum.eth.manager;
 
+import tech.pegasys.pantheon.metrics.noop.NoOpMetricsSystem;
+
 public class MockEthTask extends AbstractEthTask<Object> {
 
   private boolean executed = false;
 
+  protected MockEthTask() {
+    super(NoOpMetricsSystem.NO_OP_LABELLED_TIMER);
+  }
+
   @Override
   protected void executeTask() {
     executed = true;

ethereum/eth/src/test/java/tech/pegasys/pantheon/ethereum/eth/manager/ethtaskutils/AbstractMessageTaskTest.java

@@ -24,6 +24,9 @@ import tech.pegasys.pantheon.ethereum.eth.manager.EthTask;
 import tech.pegasys.pantheon.ethereum.eth.manager.RespondingEthPeer;
 import tech.pegasys.pantheon.ethereum.eth.manager.RespondingEthPeer.Responder;
 import tech.pegasys.pantheon.ethereum.mainnet.ProtocolSchedule;
+import tech.pegasys.pantheon.metrics.LabelledMetric;
+import tech.pegasys.pantheon.metrics.OperationTimer;
+import tech.pegasys.pantheon.metrics.noop.NoOpMetricsSystem;
 
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ExecutionException;
@@ -43,6 +46,7 @@ public abstract class AbstractMessageTaskTest<T, R> {
   protected static Blockchain blockchain;
   protected static ProtocolSchedule<Void> protocolSchedule;
   protected static ProtocolContext<Void> protocolContext;
+  protected static LabelledMetric<OperationTimer> ethTasksTimer;
   protected EthProtocolManager ethProtocolManager;
   protected EthContext ethContext;
   protected AtomicBoolean peersDoTimeout;
@@ -55,6 +59,7 @@ public abstract class AbstractMessageTaskTest<T, R> {
     blockchain = blockchainSetupUtil.getBlockchain();
     protocolSchedule = blockchainSetupUtil.getProtocolSchedule();
     protocolContext = blockchainSetupUtil.getProtocolContext();
+    ethTasksTimer = NoOpMetricsSystem.NO_OP_LABELLED_TIMER;
     assert (blockchainSetupUtil.getMaxBlockNumber() >= 20L);
   }
 

ethereum/eth/src/test/java/tech/pegasys/pantheon/ethereum/eth/sync/BlockPropagationManagerTest.java

@@ -35,7 +35,8 @@ import tech.pegasys.pantheon.ethereum.eth.sync.state.SyncState;
 import tech.pegasys.pantheon.ethereum.mainnet.ProtocolSchedule;
 import tech.pegasys.pantheon.ethereum.testutil.BlockDataGenerator;
 import tech.pegasys.pantheon.ethereum.testutil.BlockDataGenerator.BlockOptions;
-import tech.pegasys.pantheon.metrics.MetricsSystem;
+import tech.pegasys.pantheon.metrics.LabelledMetric;
+import tech.pegasys.pantheon.metrics.OperationTimer;
 import tech.pegasys.pantheon.metrics.noop.NoOpMetricsSystem;
 import tech.pegasys.pantheon.util.uint.UInt256;
 
@@ -58,7 +59,8 @@ public class BlockPropagationManagerTest {
   private SynchronizerConfiguration syncConfig;
   private final PendingBlocks pendingBlocks = new PendingBlocks();
   private SyncState syncState;
-  private final MetricsSystem metricsSystem = new NoOpMetricsSystem();
+  private final LabelledMetric<OperationTimer> ethTasksTimer =
+      NoOpMetricsSystem.NO_OP_LABELLED_TIMER;
 
   @BeforeClass
   public static void setupSuite() {
@@ -91,7 +93,7 @@ public class BlockPropagationManagerTest {
             ethProtocolManager.ethContext(),
             syncState,
             pendingBlocks,
-            metricsSystem);
+            ethTasksTimer);
   }
 
   @Test
@@ -467,7 +469,7 @@ public class BlockPropagationManagerTest {
             ethProtocolManager.ethContext(),
             syncState,
             pendingBlocks,
-            metricsSystem);
+            ethTasksTimer);
 
     final BlockDataGenerator gen = new BlockDataGenerator();
     // Import some blocks

ethereum/eth/src/test/java/tech/pegasys/pantheon/ethereum/eth/sync/ChainHeadTrackerTest.java

@@ -26,6 +26,7 @@ import tech.pegasys.pantheon.ethereum.eth.manager.RespondingEthPeer;
 import tech.pegasys.pantheon.ethereum.eth.manager.RespondingEthPeer.Responder;
 import tech.pegasys.pantheon.ethereum.eth.manager.ethtaskutils.BlockchainSetupUtil;
 import tech.pegasys.pantheon.ethereum.mainnet.ProtocolSchedule;
+import tech.pegasys.pantheon.metrics.noop.NoOpMetricsSystem;
 import tech.pegasys.pantheon.util.uint.UInt256;
 
 import org.junit.Test;
@@ -46,7 +47,11 @@ public class ChainHeadTrackerTest {
       DevelopmentProtocolSchedule.create(GenesisConfigFile.DEFAULT.getConfigOptions());
   private final TrailingPeerLimiter trailingPeerLimiter = mock(TrailingPeerLimiter.class);
   private final ChainHeadTracker chainHeadTracker =
-      new ChainHeadTracker(ethProtocolManager.ethContext(), protocolSchedule, trailingPeerLimiter);
+      new ChainHeadTracker(
+          ethProtocolManager.ethContext(),
+          protocolSchedule,
+          trailingPeerLimiter,
+          NoOpMetricsSystem.NO_OP_LABELLED_TIMER);
 
   @Test
   public void shouldRequestHeaderChainHeadWhenNewPeerConnects() {

ethereum/eth/src/test/java/tech/pegasys/pantheon/ethereum/eth/sync/DownloaderTest.java

@@ -40,6 +40,9 @@ import tech.pegasys.pantheon.ethereum.mainnet.ProtocolSchedule;
 import tech.pegasys.pantheon.ethereum.p2p.api.MessageData;
 import tech.pegasys.pantheon.ethereum.p2p.wire.messages.DisconnectMessage.DisconnectReason;
 import tech.pegasys.pantheon.ethereum.testutil.BlockDataGenerator;
+import tech.pegasys.pantheon.metrics.LabelledMetric;
+import tech.pegasys.pantheon.metrics.OperationTimer;
+import tech.pegasys.pantheon.metrics.noop.NoOpMetricsSystem;
 import tech.pegasys.pantheon.util.uint.UInt256;
 
 import java.util.ArrayList;
@@ -65,6 +68,7 @@ public class DownloaderTest {
   protected MutableBlockchain localBlockchain;
   private BlockchainSetupUtil<Void> otherBlockchainSetup;
   protected Blockchain otherBlockchain;
+  private LabelledMetric<OperationTimer> ethTashsTimer;
 
   @Before
   public void setupTest() {
@@ -79,10 +83,13 @@ public class DownloaderTest {
     ethProtocolManager = EthProtocolManagerTestUtil.create(localBlockchain);
     ethContext = ethProtocolManager.ethContext();
     syncState = new SyncState(protocolContext.getBlockchain(), ethContext.getEthPeers());
+
+    ethTashsTimer = NoOpMetricsSystem.NO_OP_LABELLED_TIMER;
   }
 
   private Downloader<?> downloader(final SynchronizerConfiguration syncConfig) {
-    return new Downloader<>(syncConfig, protocolSchedule, protocolContext, ethContext, syncState);
+    return new Downloader<>(
+        syncConfig, protocolSchedule, protocolContext, ethContext, syncState, ethTashsTimer);
   }
 
   private Downloader<?> downloader() {

ethereum/eth/src/test/java/tech/pegasys/pantheon/ethereum/eth/sync/tasks/CompleteBlocksTaskTest.java

@@ -17,6 +17,7 @@ import tech.pegasys.pantheon.ethereum.core.BlockBody;
 import tech.pegasys.pantheon.ethereum.core.BlockHeader;
 import tech.pegasys.pantheon.ethereum.eth.manager.EthTask;
 import tech.pegasys.pantheon.ethereum.eth.manager.ethtaskutils.RetryingMessageTaskTest;
+import tech.pegasys.pantheon.metrics.noop.NoOpMetricsSystem;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -41,6 +42,10 @@ public class CompleteBlocksTaskTest extends RetryingMessageTaskTest<List<Block>>
     final List<BlockHeader> headersToComplete =
         requestedData.stream().map(Block::getHeader).collect(Collectors.toList());
     return CompleteBlocksTask.forHeaders(
-        protocolSchedule, ethContext, headersToComplete, maxRetries);
+        protocolSchedule,
+        ethContext,
+        headersToComplete,
+        maxRetries,
+        NoOpMetricsSystem.NO_OP_LABELLED_TIMER);
   }
 }

ethereum/eth/src/test/java/tech/pegasys/pantheon/ethereum/eth/sync/tasks/DetermineCommonAncestorTaskParameterizedTest.java

@@ -31,6 +31,9 @@ import tech.pegasys.pantheon.ethereum.mainnet.MainnetBlockHashFunction;
 import tech.pegasys.pantheon.ethereum.mainnet.MainnetProtocolSchedule;
 import tech.pegasys.pantheon.ethereum.mainnet.ProtocolSchedule;
 import tech.pegasys.pantheon.ethereum.testutil.BlockDataGenerator;
+import tech.pegasys.pantheon.metrics.LabelledMetric;
+import tech.pegasys.pantheon.metrics.OperationTimer;
+import tech.pegasys.pantheon.metrics.noop.NoOpMetricsSystem;
 import tech.pegasys.pantheon.util.uint.UInt256;
 
 import java.io.IOException;
@@ -52,6 +55,8 @@ import org.junit.runners.Parameterized.Parameters;
 public class DetermineCommonAncestorTaskParameterizedTest {
   private final ProtocolSchedule<Void> protocolSchedule = MainnetProtocolSchedule.create();
   private static final BlockDataGenerator blockDataGenerator = new BlockDataGenerator();
+  private final LabelledMetric<OperationTimer> ethTasksTimer =
+      NoOpMetricsSystem.NO_OP_LABELLED_TIMER;
 
   private static Block genesisBlock;
   private static MutableBlockchain localBlockchain;
@@ -154,7 +159,8 @@ public class DetermineCommonAncestorTaskParameterizedTest {
             protocolContext,
             ethContext,
             respondingEthPeer.getEthPeer(),
-            headerRequestSize);
+            headerRequestSize,
+            ethTasksTimer);
 
     final CompletableFuture<BlockHeader> future = task.run();
     respondingEthPeer.respondWhile(responder, () -> !future.isDone());

ethereum/eth/src/test/java/tech/pegasys/pantheon/ethereum/eth/sync/tasks/DetermineCommonAncestorTaskTest.java

@@ -41,6 +41,9 @@ import tech.pegasys.pantheon.ethereum.mainnet.MainnetProtocolSchedule;
 import tech.pegasys.pantheon.ethereum.mainnet.ProtocolSchedule;
 import tech.pegasys.pantheon.ethereum.p2p.wire.messages.DisconnectMessage.DisconnectReason;
 import tech.pegasys.pantheon.ethereum.testutil.BlockDataGenerator;
+import tech.pegasys.pantheon.metrics.LabelledMetric;
+import tech.pegasys.pantheon.metrics.OperationTimer;
+import tech.pegasys.pantheon.metrics.noop.NoOpMetricsSystem;
 import tech.pegasys.pantheon.util.ExceptionUtils;
 import tech.pegasys.pantheon.util.uint.UInt256;
 
@@ -56,6 +59,8 @@ public class DetermineCommonAncestorTaskTest {
 
   private final ProtocolSchedule<Void> protocolSchedule = MainnetProtocolSchedule.create();
   private final BlockDataGenerator blockDataGenerator = new BlockDataGenerator();
+  private final LabelledMetric<OperationTimer> ethTasksTimer =
+      NoOpMetricsSystem.NO_OP_LABELLED_TIMER;
   private MutableBlockchain localBlockchain;
   private final int defaultHeaderRequestSize = 10;
   Block genesisBlock;
@@ -110,7 +115,8 @@ public class DetermineCommonAncestorTaskTest {
             protocolContext,
             ethContext,
             respondingEthPeer.getEthPeer(),
-            defaultHeaderRequestSize);
+            defaultHeaderRequestSize,
+            ethTasksTimer);
 
     final CompletableFuture<BlockHeader> future = task.run();
     respondingEthPeer.respondWhile(responder, () -> !future.isDone());
@@ -146,7 +152,8 @@ public class DetermineCommonAncestorTaskTest {
             protocolContext,
             ethContext,
             respondingEthPeer.getEthPeer(),
-            defaultHeaderRequestSize);
+            defaultHeaderRequestSize,
+            ethTasksTimer);
 
     // Execute task and wait for response
     final AtomicReference<Throwable> failure = new AtomicReference<>();
@@ -216,7 +223,8 @@ public class DetermineCommonAncestorTaskTest {
             protocolContext,
             ethContext,
             respondingEthPeer.getEthPeer(),
-            defaultHeaderRequestSize);
+            defaultHeaderRequestSize,
+            ethTasksTimer);
     final DetermineCommonAncestorTask<Void> spy = spy(task);
 
     // Execute task
@@ -272,7 +280,8 @@ public class DetermineCommonAncestorTaskTest {
             protocolContext,
             ethContext,
             respondingEthPeer.getEthPeer(),
-            defaultHeaderRequestSize);
+            defaultHeaderRequestSize,
+            ethTasksTimer);
     final DetermineCommonAncestorTask<Void> spy = spy(task);
 
     // Execute task
@@ -343,7 +352,8 @@ public class DetermineCommonAncestorTaskTest {
             protocolContext,
             ethContext,
             respondingEthPeer.getEthPeer(),
-            defaultHeaderRequestSize);
+            defaultHeaderRequestSize,
+            ethTasksTimer);
     final DetermineCommonAncestorTask<Void> spy = spy(task);
 
     // Execute task
@@ -370,7 +380,12 @@ public class DetermineCommonAncestorTaskTest {
 
     final EthTask<BlockHeader> task =
         DetermineCommonAncestorTask.create(
-            protocolSchedule, protocolContext, ethContext, peer, defaultHeaderRequestSize);
+            protocolSchedule,
+            protocolContext,
+            ethContext,
+            peer,
+            defaultHeaderRequestSize,
+            ethTasksTimer);
 
     final CompletableFuture<BlockHeader> result = task.run();
     assertThat(result).isCompletedWithValue(genesisBlock.getHeader());

ethereum/eth/src/test/java/tech/pegasys/pantheon/ethereum/eth/sync/tasks/DownloadHeaderSequenceTaskTest.java

@@ -59,7 +59,8 @@ public class DownloadHeaderSequenceTaskTest extends RetryingMessageTaskTest<List
         ethContext,
         referenceHeader,
         requestedData.size(),
-        maxRetries);
+        maxRetries,
+        ethTasksTimer);
   }
 
   @Test
@@ -68,10 +69,16 @@ public class DownloadHeaderSequenceTaskTest extends RetryingMessageTaskTest<List
         EthProtocolManagerTestUtil.createPeer(ethProtocolManager);
 
     // Execute task and wait for response
-    BlockHeader referenceHeader = blockchain.getChainHeadHeader();
+    final BlockHeader referenceHeader = blockchain.getChainHeadHeader();
     final EthTask<List<BlockHeader>> task =
         DownloadHeaderSequenceTask.endingAtHeader(
-            protocolSchedule, protocolContext, ethContext, referenceHeader, 10, maxRetries);
+            protocolSchedule,
+            protocolContext,
+            ethContext,
+            referenceHeader,
+            10,
+            maxRetries,
+            ethTasksTimer);
     final CompletableFuture<List<BlockHeader>> future = task.run();
 
     // Respond with only the reference header
@@ -91,23 +98,30 @@ public class DownloadHeaderSequenceTaskTest extends RetryingMessageTaskTest<List
         EthProtocolManagerTestUtil.createPeer(ethProtocolManager);
 
     // Execute task and wait for response
-    BlockHeader referenceHeader = blockchain.getChainHeadHeader();
+    final BlockHeader referenceHeader = blockchain.getChainHeadHeader();
     final EthTask<List<BlockHeader>> task =
         DownloadHeaderSequenceTask.endingAtHeader(
-            protocolSchedule, protocolContext, ethContext, referenceHeader, 10, maxRetries);
+            protocolSchedule,
+            protocolContext,
+            ethContext,
+            referenceHeader,
+            10,
+            maxRetries,
+            ethTasksTimer);
     final CompletableFuture<List<BlockHeader>> future = task.run();
 
     // Filter response to include only reference header and previous header
     final Responder fullResponder = RespondingEthPeer.blockchainResponder(blockchain);
     final Responder responder =
         (cap, message) -> {
-          Optional<MessageData> fullResponse = fullResponder.respond(cap, message);
+          final Optional<MessageData> fullResponse = fullResponder.respond(cap, message);
           if (!fullResponse.isPresent() || message.getCode() != EthPV62.GET_BLOCK_HEADERS) {
             return fullResponse;
           }
-          BlockHeadersMessage headersMessage = BlockHeadersMessage.readFrom(fullResponse.get());
+          final BlockHeadersMessage headersMessage =
+              BlockHeadersMessage.readFrom(fullResponse.get());
           // Filter for a subset of headers
-          List<BlockHeader> headerSubset =
+          final List<BlockHeader> headerSubset =
               Streams.stream(headersMessage.getHeaders(protocolSchedule))
                   .filter(h -> h.getNumber() >= referenceHeader.getNumber() - 1L)
                   .collect(Collectors.toList());

ethereum/eth/src/test/java/tech/pegasys/pantheon/ethereum/eth/sync/tasks/GetBlockFromPeerTaskTest.java

@@ -47,7 +47,8 @@ public class GetBlockFromPeerTaskTest
 
   @Override
   protected EthTask<PeerTaskResult<Block>> createTask(final Block requestedData) {
-    return GetBlockFromPeerTask.create(protocolSchedule, ethContext, requestedData.getHash());
+    return GetBlockFromPeerTask.create(
+        protocolSchedule, ethContext, requestedData.getHash(), ethTasksTimer);
   }
 
   @Override

ethereum/eth/src/test/java/tech/pegasys/pantheon/ethereum/eth/sync/tasks/GetBodiesFromPeerTaskTest.java

@@ -20,6 +20,7 @@ import tech.pegasys.pantheon.ethereum.core.BlockHeader;
 import tech.pegasys.pantheon.ethereum.eth.manager.AbstractPeerTask.PeerTaskResult;
 import tech.pegasys.pantheon.ethereum.eth.manager.EthTask;
 import tech.pegasys.pantheon.ethereum.eth.manager.ethtaskutils.PeerMessageTaskTest;
+import tech.pegasys.pantheon.metrics.noop.NoOpMetricsSystem;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -42,7 +43,8 @@ public class GetBodiesFromPeerTaskTest extends PeerMessageTaskTest<List<Block>>
   protected EthTask<PeerTaskResult<List<Block>>> createTask(final List<Block> requestedData) {
     final List<BlockHeader> headersToComplete =
         requestedData.stream().map(Block::getHeader).collect(Collectors.toList());
-    return GetBodiesFromPeerTask.forHeaders(protocolSchedule, ethContext, headersToComplete);
+    return GetBodiesFromPeerTask.forHeaders(
+        protocolSchedule, ethContext, headersToComplete, NoOpMetricsSystem.NO_OP_LABELLED_TIMER);
   }
 
   @Override

ethereum/eth/src/test/java/tech/pegasys/pantheon/ethereum/eth/sync/tasks/GetHeadersFromPeerByHashTaskTest.java

@@ -61,7 +61,8 @@ public class GetHeadersFromPeerByHashTaskTest extends PeerMessageTaskTest<List<B
         ethContext,
         firstHeader.getHash(),
         firstHeader.getNumber(),
-        requestedData.size());
+        requestedData.size(),
+        ethTasksTimer);
   }
 
   @Test
@@ -108,7 +109,8 @@ public class GetHeadersFromPeerByHashTaskTest extends PeerMessageTaskTest<List<B
             startNumber,
             count,
             skip,
-            reverse);
+            reverse,
+            ethTasksTimer);
     final AtomicReference<PeerTaskResult<List<BlockHeader>>> actualResult = new AtomicReference<>();
     final AtomicBoolean done = new AtomicBoolean(false);
     final CompletableFuture<PeerTaskResult<List<BlockHeader>>> future = task.run();

ethereum/eth/src/test/java/tech/pegasys/pantheon/ethereum/eth/sync/tasks/GetHeadersFromPeerByNumberTaskTest.java

@@ -20,6 +20,7 @@ import tech.pegasys.pantheon.ethereum.eth.manager.EthProtocolManagerTestUtil;
 import tech.pegasys.pantheon.ethereum.eth.manager.EthTask;
 import tech.pegasys.pantheon.ethereum.eth.manager.RespondingEthPeer;
 import tech.pegasys.pantheon.ethereum.eth.manager.ethtaskutils.PeerMessageTaskTest;
+import tech.pegasys.pantheon.metrics.noop.NoOpMetricsSystem;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -56,7 +57,11 @@ public class GetHeadersFromPeerByNumberTaskTest extends PeerMessageTaskTest<List
       final List<BlockHeader> requestedData) {
     final BlockHeader firstHeader = requestedData.get(0);
     return GetHeadersFromPeerByNumberTask.startingAtNumber(
-        protocolSchedule, ethContext, firstHeader.getNumber(), requestedData.size());
+        protocolSchedule,
+        ethContext,
+        firstHeader.getNumber(),
+        requestedData.size(),
+        NoOpMetricsSystem.NO_OP_LABELLED_TIMER);
   }
 
   @Test
@@ -97,7 +102,13 @@ public class GetHeadersFromPeerByNumberTaskTest extends PeerMessageTaskTest<List
     // Execute task and wait for response
     final AbstractGetHeadersFromPeerTask task =
         new GetHeadersFromPeerByNumberTask(
-            protocolSchedule, ethContext, startNumber, count, skip, reverse);
+            protocolSchedule,
+            ethContext,
+            startNumber,
+            count,
+            skip,
+            reverse,
+            NoOpMetricsSystem.NO_OP_LABELLED_TIMER);
     final AtomicReference<AbstractPeerTask.PeerTaskResult<List<BlockHeader>>> actualResult =
         new AtomicReference<>();
     final AtomicBoolean done = new AtomicBoolean(false);

ethereum/eth/src/test/java/tech/pegasys/pantheon/ethereum/eth/sync/tasks/ImportBlocksTaskTest.java

@@ -32,6 +32,7 @@ import tech.pegasys.pantheon.ethereum.eth.messages.BlockHeadersMessage;
 import tech.pegasys.pantheon.ethereum.eth.messages.EthPV62;
 import tech.pegasys.pantheon.ethereum.p2p.api.MessageData;
 import tech.pegasys.pantheon.ethereum.p2p.wire.Capability;
+import tech.pegasys.pantheon.metrics.noop.NoOpMetricsSystem;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -71,12 +72,13 @@ public class ImportBlocksTaskTest
             shortBlockchain,
             protocolContext.getWorldStateArchive(),
             protocolContext.getConsensusState());
-    return ImportBlocksTask.<Void>fromHeader(
+    return ImportBlocksTask.fromHeader(
         protocolSchedule,
         modifiedContext,
         ethContext,
         firstBlock.getHeader(),
-        requestedData.size());
+        requestedData.size(),
+        NoOpMetricsSystem.NO_OP_LABELLED_TIMER);
   }
 
   @Override

ethereum/eth/src/test/java/tech/pegasys/pantheon/ethereum/eth/sync/tasks/PersistBlockTaskTest.java

@@ -24,6 +24,9 @@ import tech.pegasys.pantheon.ethereum.eth.sync.tasks.exceptions.InvalidBlockExce
 import tech.pegasys.pantheon.ethereum.mainnet.HeaderValidationMode;
 import tech.pegasys.pantheon.ethereum.mainnet.ProtocolSchedule;
 import tech.pegasys.pantheon.ethereum.testutil.BlockDataGenerator;
+import tech.pegasys.pantheon.metrics.LabelledMetric;
+import tech.pegasys.pantheon.metrics.OperationTimer;
+import tech.pegasys.pantheon.metrics.noop.NoOpMetricsSystem;
 
 import java.util.Arrays;
 import java.util.Collections;
@@ -41,6 +44,8 @@ public class PersistBlockTaskTest {
   private ProtocolSchedule<Void> protocolSchedule;
   private ProtocolContext<Void> protocolContext;
   private MutableBlockchain blockchain;
+  private final LabelledMetric<OperationTimer> ethTasksTimer =
+      NoOpMetricsSystem.NO_OP_LABELLED_TIMER;
 
   @Before
   public void setup() {
@@ -61,7 +66,7 @@ public class PersistBlockTaskTest {
     // Create task
     final PersistBlockTask<Void> task =
         PersistBlockTask.create(
-            protocolSchedule, protocolContext, nextBlock, HeaderValidationMode.FULL);
+            protocolSchedule, protocolContext, nextBlock, HeaderValidationMode.FULL, ethTasksTimer);
     final CompletableFuture<Block> result = task.run();
 
     Awaitility.await().atMost(30, SECONDS).until(result::isDone);
@@ -83,7 +88,7 @@ public class PersistBlockTaskTest {
     // Create task
     final PersistBlockTask<Void> task =
         PersistBlockTask.create(
-            protocolSchedule, protocolContext, nextBlock, HeaderValidationMode.FULL);
+            protocolSchedule, protocolContext, nextBlock, HeaderValidationMode.FULL, ethTasksTimer);
     final CompletableFuture<Block> result = task.run();
 
     Awaitility.await().atMost(30, SECONDS).until(result::isDone);
@@ -107,7 +112,11 @@ public class PersistBlockTaskTest {
     // Create task
     final CompletableFuture<List<Block>> task =
         PersistBlockTask.forSequentialBlocks(
-                protocolSchedule, protocolContext, nextBlocks, HeaderValidationMode.FULL)
+                protocolSchedule,
+                protocolContext,
+                nextBlocks,
+                HeaderValidationMode.FULL,
+                ethTasksTimer)
             .get();
 
     Awaitility.await().atMost(30, SECONDS).until(task::isDone);
@@ -133,7 +142,11 @@ public class PersistBlockTaskTest {
     // Create task
     final CompletableFuture<List<Block>> task =
         PersistBlockTask.forSequentialBlocks(
-                protocolSchedule, protocolContext, nextBlocks, HeaderValidationMode.FULL)
+                protocolSchedule,
+                protocolContext,
+                nextBlocks,
+                HeaderValidationMode.FULL,
+                ethTasksTimer)
             .get();
 
     Awaitility.await().atMost(30, SECONDS).until(task::isDone);
@@ -158,7 +171,11 @@ public class PersistBlockTaskTest {
     // Create task
     final CompletableFuture<List<Block>> task =
         PersistBlockTask.forSequentialBlocks(
-                protocolSchedule, protocolContext, nextBlocks, HeaderValidationMode.FULL)
+                protocolSchedule,
+                protocolContext,
+                nextBlocks,
+                HeaderValidationMode.FULL,
+                ethTasksTimer)
             .get();
 
     Awaitility.await().atMost(30, SECONDS).until(task::isDone);
@@ -183,7 +200,11 @@ public class PersistBlockTaskTest {
     // Create task
     final CompletableFuture<List<Block>> task =
         PersistBlockTask.forUnorderedBlocks(
-                protocolSchedule, protocolContext, nextBlocks, HeaderValidationMode.FULL)
+                protocolSchedule,
+                protocolContext,
+                nextBlocks,
+                HeaderValidationMode.FULL,
+                ethTasksTimer)
             .get();
 
     Awaitility.await().atMost(30, SECONDS).until(task::isDone);
@@ -211,7 +232,11 @@ public class PersistBlockTaskTest {
     // Create task
     final CompletableFuture<List<Block>> task =
         PersistBlockTask.forUnorderedBlocks(
-                protocolSchedule, protocolContext, nextBlocks, HeaderValidationMode.FULL)
+                protocolSchedule,
+                protocolContext,
+                nextBlocks,
+                HeaderValidationMode.FULL,
+                ethTasksTimer)
             .get();
 
     Awaitility.await().atMost(30, SECONDS).until(task::isDone);
@@ -236,7 +261,11 @@ public class PersistBlockTaskTest {
     // Create task
     final CompletableFuture<List<Block>> task =
         PersistBlockTask.forUnorderedBlocks(
-                protocolSchedule, protocolContext, nextBlocks, HeaderValidationMode.FULL)
+                protocolSchedule,
+                protocolContext,
+                nextBlocks,
+                HeaderValidationMode.FULL,
+                ethTasksTimer)
             .get();
 
     Awaitility.await().atMost(30, SECONDS).until(task::isDone);
@@ -263,7 +292,11 @@ public class PersistBlockTaskTest {
     // Create task
     final CompletableFuture<List<Block>> task =
         PersistBlockTask.forUnorderedBlocks(
-                protocolSchedule, protocolContext, nextBlocks, HeaderValidationMode.FULL)
+                protocolSchedule,
+                protocolContext,
+                nextBlocks,
+                HeaderValidationMode.FULL,
+                ethTasksTimer)
             .get();
 
     Awaitility.await().atMost(30, SECONDS).until(task::isDone);
@@ -286,7 +319,7 @@ public class PersistBlockTaskTest {
     // Create task
     final PersistBlockTask<Void> task =
         PersistBlockTask.create(
-            protocolSchedule, protocolContext, nextBlock, HeaderValidationMode.FULL);
+            protocolSchedule, protocolContext, nextBlock, HeaderValidationMode.FULL, ethTasksTimer);
 
     task.cancel();
     final CompletableFuture<Block> result = task.run();
@@ -306,9 +339,9 @@ public class PersistBlockTaskTest {
     // Create task
     final PersistBlockTask<Void> task =
         PersistBlockTask.create(
-            protocolSchedule, protocolContext, nextBlock, HeaderValidationMode.FULL);
+            protocolSchedule, protocolContext, nextBlock, HeaderValidationMode.FULL, ethTasksTimer);
     final PersistBlockTask<Void> taskSpy = Mockito.spy(task);
-    Mockito.doNothing().when(taskSpy).executeTask();
+    Mockito.doNothing().when(taskSpy).executeTaskTimed();
 
     final CompletableFuture<Block> result = taskSpy.run();
     taskSpy.cancel();

ethereum/eth/src/test/java/tech/pegasys/pantheon/ethereum/eth/sync/tasks/PipelinedImportChainSegmentTaskTest.java

@@ -84,7 +84,9 @@ public class PipelinedImportChainSegmentTaskTest
         modifiedContext,
         ethContext,
         1,
-        new BlockHeader[] {previousBlock.getHeader(), lastBlock.getHeader()});
+        ethTasksTimer,
+        previousBlock.getHeader(),
+        lastBlock.getHeader());
   }
 
   @Override
@@ -116,6 +118,7 @@ public class PipelinedImportChainSegmentTaskTest
             modifiedContext,
             ethContext,
             1,
+            ethTasksTimer,
             firstBlock.getHeader(),
             secondBlock.getHeader());
 
@@ -165,6 +168,7 @@ public class PipelinedImportChainSegmentTaskTest
             modifiedContext,
             ethContext,
             1,
+            ethTasksTimer,
             fakeFirstBlock.getHeader(),
             thirdBlock.getHeader());
 
@@ -214,7 +218,7 @@ public class PipelinedImportChainSegmentTaskTest
             protocolContext.getConsensusState());
     final EthTask<List<Block>> task =
         PipelinedImportChainSegmentTask.forCheckpoints(
-            protocolSchedule, modifiedContext, ethContext, 1, checkpointHeaders);
+            protocolSchedule, modifiedContext, ethContext, 1, ethTasksTimer, checkpointHeaders);
 
     // Execute task and wait for response
     final AtomicReference<List<Block>> actualResult = new AtomicReference<>();
@@ -270,7 +274,7 @@ public class PipelinedImportChainSegmentTaskTest
             protocolContext.getConsensusState());
     final EthTask<List<Block>> task =
         PipelinedImportChainSegmentTask.forCheckpoints(
-            protocolSchedule, modifiedContext, ethContext, 2, checkpointHeaders);
+            protocolSchedule, modifiedContext, ethContext, 2, ethTasksTimer, checkpointHeaders);
 
     // Execute task and wait for response
     final AtomicReference<List<Block>> actualResult = new AtomicReference<>();
@@ -330,7 +334,7 @@ public class PipelinedImportChainSegmentTaskTest
             protocolContext.getConsensusState());
     final EthTask<List<Block>> task =
         PipelinedImportChainSegmentTask.forCheckpoints(
-            protocolSchedule, modifiedContext, ethContext, 3, checkpointHeaders);
+            protocolSchedule, modifiedContext, ethContext, 3, ethTasksTimer, checkpointHeaders);
 
     // Execute task and wait for response
     final AtomicReference<List<Block>> actualResult = new AtomicReference<>();

ethereum/eth/src/test/java/tech/pegasys/pantheon/ethereum/eth/sync/tasks/WaitForPeerTaskTest.java

@@ -18,6 +18,9 @@ import tech.pegasys.pantheon.ethereum.eth.manager.EthContext;
 import tech.pegasys.pantheon.ethereum.eth.manager.EthProtocolManager;
 import tech.pegasys.pantheon.ethereum.eth.manager.EthProtocolManagerTestUtil;
 import tech.pegasys.pantheon.ethereum.eth.manager.EthTask;
+import tech.pegasys.pantheon.metrics.LabelledMetric;
+import tech.pegasys.pantheon.metrics.OperationTimer;
+import tech.pegasys.pantheon.metrics.noop.NoOpMetricsSystem;
 
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ExecutionException;
@@ -29,18 +32,20 @@ import org.junit.Test;
 public class WaitForPeerTaskTest {
   private EthProtocolManager ethProtocolManager;
   private EthContext ethContext;
+  private LabelledMetric<OperationTimer> ethTasksTimer;
 
   @Before
   public void setupTest() {
     ethProtocolManager = EthProtocolManagerTestUtil.create();
     ethContext = ethProtocolManager.ethContext();
+    ethTasksTimer = NoOpMetricsSystem.NO_OP_LABELLED_TIMER;
   }
 
   @Test
   public void completesWhenPeerConnects() throws ExecutionException, InterruptedException {
     // Execute task and wait for response
     final AtomicBoolean successful = new AtomicBoolean(false);
-    final EthTask<Void> task = WaitForPeerTask.create(ethContext);
+    final EthTask<Void> task = WaitForPeerTask.create(ethContext, ethTasksTimer);
     final CompletableFuture<Void> future = task.run();
     future.whenComplete(
         (result, error) -> {
@@ -55,7 +60,7 @@ public class WaitForPeerTaskTest {
   @Test
   public void doesNotCompleteWhenNoPeerConnects() throws ExecutionException, InterruptedException {
     final AtomicBoolean successful = new AtomicBoolean(false);
-    final EthTask<Void> task = WaitForPeerTask.create(ethContext);
+    final EthTask<Void> task = WaitForPeerTask.create(ethContext, ethTasksTimer);
     final CompletableFuture<Void> future = task.run();
     future.whenComplete(
         (result, error) -> {
@@ -70,7 +75,7 @@ public class WaitForPeerTaskTest {
   @Test
   public void cancel() throws ExecutionException, InterruptedException {
     // Execute task
-    final EthTask<Void> task = WaitForPeerTask.create(ethContext);
+    final EthTask<Void> task = WaitForPeerTask.create(ethContext, ethTasksTimer);
     final CompletableFuture<Void> future = task.run();
 
     assertThat(future.isDone()).isFalse();

ethereum/eth/src/test/java/tech/pegasys/pantheon/ethereum/eth/sync/tasks/WaitForPeersTaskTest.java

@@ -18,6 +18,9 @@ import tech.pegasys.pantheon.ethereum.eth.manager.EthContext;
 import tech.pegasys.pantheon.ethereum.eth.manager.EthProtocolManager;
 import tech.pegasys.pantheon.ethereum.eth.manager.EthProtocolManagerTestUtil;
 import tech.pegasys.pantheon.ethereum.eth.manager.EthTask;
+import tech.pegasys.pantheon.metrics.LabelledMetric;
+import tech.pegasys.pantheon.metrics.OperationTimer;
+import tech.pegasys.pantheon.metrics.noop.NoOpMetricsSystem;
 
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ExecutionException;
@@ -29,18 +32,20 @@ import org.junit.Test;
 public class WaitForPeersTaskTest {
   private EthProtocolManager ethProtocolManager;
   private EthContext ethContext;
+  private LabelledMetric<OperationTimer> ethTasksTimer;
 
   @Before
   public void setupTest() {
     ethProtocolManager = EthProtocolManagerTestUtil.create();
     ethContext = ethProtocolManager.ethContext();
+    ethTasksTimer = NoOpMetricsSystem.NO_OP_LABELLED_TIMER;
   }
 
   @Test
   public void completesWhenPeersConnects() throws ExecutionException, InterruptedException {
     // Execute task and wait for response
     final AtomicBoolean successful = new AtomicBoolean(false);
-    final EthTask<Void> task = WaitForPeersTask.create(ethContext, 2);
+    final EthTask<Void> task = WaitForPeersTask.create(ethContext, 2, ethTasksTimer);
     final CompletableFuture<Void> future = task.run();
     future.whenComplete(
         (result, error) -> {
@@ -56,7 +61,7 @@ public class WaitForPeersTaskTest {
   @Test
   public void doesNotCompleteWhenNoPeerConnects() throws ExecutionException, InterruptedException {
     final AtomicBoolean successful = new AtomicBoolean(false);
-    final EthTask<Void> task = WaitForPeersTask.create(ethContext, 2);
+    final EthTask<Void> task = WaitForPeersTask.create(ethContext, 2, ethTasksTimer);
     final CompletableFuture<Void> future = task.run();
     future.whenComplete(
         (result, error) -> {
@@ -72,7 +77,7 @@ public class WaitForPeersTaskTest {
   public void doesNotCompleteWhenSomePeersConnects()
       throws ExecutionException, InterruptedException {
     final AtomicBoolean successful = new AtomicBoolean(false);
-    final EthTask<Void> task = WaitForPeersTask.create(ethContext, 2);
+    final EthTask<Void> task = WaitForPeersTask.create(ethContext, 2, ethTasksTimer);
     final CompletableFuture<Void> future = task.run();
     future.whenComplete(
         (result, error) -> {
@@ -88,7 +93,7 @@ public class WaitForPeersTaskTest {
   @Test
   public void cancel() throws ExecutionException, InterruptedException {
     // Execute task
-    final EthTask<Void> task = WaitForPeersTask.create(ethContext, 2);
+    final EthTask<Void> task = WaitForPeersTask.create(ethContext, 2, ethTasksTimer);
     final CompletableFuture<Void> future = task.run();
 
     assertThat(future.isDone()).isFalse();

metrics/src/main/java/tech/pegasys/pantheon/metrics/MetricCategory.java

@@ -17,7 +17,8 @@ public enum MetricCategory {
   RPC("rpc"),
   JVM("jvm", false),
   PROCESS("process", false),
-  BLOCKCHAIN("blockchain");
+  BLOCKCHAIN("blockchain"),
+  SYNCHRONIZER("synchronizer");
 
   private final String name;
   private final boolean pantheonSpecific;

metrics/src/main/java/tech/pegasys/pantheon/metrics/noop/NoOpMetricsSystem.java

@@ -28,6 +28,7 @@ public class NoOpMetricsSystem implements MetricsSystem {
   private static final Counter NO_OP_COUNTER = new NoOpCounter();
   private static final TimingContext NO_OP_TIMING_CONTEXT = () -> 0;
   private static final OperationTimer NO_OP_TIMER = () -> NO_OP_TIMING_CONTEXT;
+  public static final LabelledMetric<OperationTimer> NO_OP_LABELLED_TIMER = label -> NO_OP_TIMER;
 
   @Override
   public LabelledMetric<Counter> createLabelledCounter(

metrics/src/main/java/tech/pegasys/pantheon/metrics/prometheus/PrometheusMetricsSystem.java

@@ -35,7 +35,7 @@ import io.prometheus.client.Collector.MetricFamilySamples;
 import io.prometheus.client.Collector.MetricFamilySamples.Sample;
 import io.prometheus.client.Collector.Type;
 import io.prometheus.client.Counter;
-import io.prometheus.client.Histogram;
+import io.prometheus.client.Summary;
 import io.prometheus.client.hotspot.BufferPoolsExports;
 import io.prometheus.client.hotspot.ClassLoadingExports;
 import io.prometheus.client.hotspot.GarbageCollectorExports;
@@ -84,9 +84,18 @@ public class PrometheusMetricsSystem implements MetricsSystem {
       final String name,
       final String help,
       final String... labelNames) {
-    final Histogram histogram = Histogram.build(name, help).labelNames(labelNames).create();
+    final Summary summary =
-    addCollector(category, histogram);
+        Summary.build(convertToPrometheusName(category, name), help)
-    return new PrometheusTimer(histogram);
+            .quantile(0.2, 0.02)
+            .quantile(0.5, 0.05)
+            .quantile(0.8, 0.02)
+            .quantile(0.95, 0.005)
+            .quantile(0.99, 0.001)
+            .quantile(1.0, 0)
+            .labelNames(labelNames)
+            .create();
+    addCollector(category, summary);
+    return new PrometheusTimer(summary);
   }
 
   @Override
@@ -127,6 +136,9 @@ public class PrometheusMetricsSystem implements MetricsSystem {
     if (familySamples.type == Type.HISTOGRAM) {
       return convertHistogramSampleNamesToLabels(category, sample, familySamples);
     }
+    if (familySamples.type == Type.SUMMARY) {
+      return convertSummarySampleNamesToLabels(category, sample, familySamples);
+    }
     return new Observation(
         category,
         convertFromPrometheusName(category, sample.name),
@@ -149,6 +161,23 @@ public class PrometheusMetricsSystem implements MetricsSystem {
         labelValues);
   }
 
+  private Observation convertSummarySampleNamesToLabels(
+      final MetricCategory category, final Sample sample, final MetricFamilySamples familySamples) {
+    final List<String> labelValues = new ArrayList<>(sample.labelValues);
+    if (sample.name.endsWith("_sum")) {
+      labelValues.add("sum");
+    } else if (sample.name.endsWith("_count")) {
+      labelValues.add("count");
+    } else {
+      labelValues.add(labelValues.size() - 1, "quantile");
+    }
+    return new Observation(
+        category,
+        convertFromPrometheusName(category, familySamples.name),
+        sample.value,
+        labelValues);
+  }
+
   private String convertToPrometheusName(final MetricCategory category, final String name) {
     return prometheusPrefix(category) + name;
   }

metrics/src/main/java/tech/pegasys/pantheon/metrics/prometheus/PrometheusTimer.java

@@ -15,20 +15,19 @@ package tech.pegasys.pantheon.metrics.prometheus;
 import tech.pegasys.pantheon.metrics.LabelledMetric;
 import tech.pegasys.pantheon.metrics.OperationTimer;
 
-import io.prometheus.client.Histogram;
+import io.prometheus.client.Summary;
-import io.prometheus.client.Histogram.Child;
 
 class PrometheusTimer implements LabelledMetric<OperationTimer> {
 
-  private final Histogram histogram;
+  private final Summary summary;
 
-  public PrometheusTimer(final Histogram histogram) {
+  public PrometheusTimer(final Summary summary) {
-    this.histogram = histogram;
+    this.summary = summary;
   }
 
   @Override
   public OperationTimer labels(final String... labels) {
-    final Child metric = histogram.labels(labels);
+    final Summary.Child metric = summary.labels(labels);
     return () -> metric.startTimer()::observeDuration;
   }
 }

metrics/src/test/java/tech/pegasys/pantheon/metrics/prometheus/PrometheusMetricsSystemTest.java

@@ -91,23 +91,14 @@ public class PrometheusMetricsSystemTest {
     assertThat(metricsSystem.getMetrics())
         .usingElementComparator(IGNORE_VALUES)
         .containsExactlyInAnyOrder(
-            new Observation(RPC, "request", null, asList("bucket", "0.005")),
+            new Observation(RPC, "request", null, asList("quantile", "0.2")),
-            new Observation(RPC, "request", null, asList("bucket", "0.01")),
+            new Observation(RPC, "request", null, asList("quantile", "0.5")),
-            new Observation(RPC, "request", null, asList("bucket", "0.025")),
+            new Observation(RPC, "request", null, asList("quantile", "0.8")),
-            new Observation(RPC, "request", null, asList("bucket", "0.05")),
+            new Observation(RPC, "request", null, asList("quantile", "0.95")),
-            new Observation(RPC, "request", null, asList("bucket", "0.075")),
+            new Observation(RPC, "request", null, asList("quantile", "0.99")),
-            new Observation(RPC, "request", null, asList("bucket", "0.1")),
+            new Observation(RPC, "request", null, asList("quantile", "1.0")),
-            new Observation(RPC, "request", null, asList("bucket", "0.25")),
-            new Observation(RPC, "request", null, asList("bucket", "0.5")),
-            new Observation(RPC, "request", null, asList("bucket", "0.75")),
-            new Observation(RPC, "request", null, asList("bucket", "1.0")),
-            new Observation(RPC, "request", null, asList("bucket", "2.5")),
-            new Observation(RPC, "request", null, asList("bucket", "5.0")),
-            new Observation(RPC, "request", null, asList("bucket", "7.5")),
-            new Observation(RPC, "request", null, asList("bucket", "10.0")),
-            new Observation(RPC, "request", null, asList("bucket", "+Inf")),
             new Observation(RPC, "request", null, singletonList("sum")),
-            new Observation(RPC, "request", 1d, singletonList("count")));
+            new Observation(RPC, "request", null, singletonList("count")));
   }
 
   @Test
@@ -120,21 +111,12 @@ public class PrometheusMetricsSystemTest {
     assertThat(metricsSystem.getMetrics())
         .usingElementComparator(IGNORE_VALUES) // We don't know how long it will actually take.
         .containsExactlyInAnyOrder(
-            new Observation(RPC, "request", null, asList("method", "bucket", "0.005")),
+            new Observation(RPC, "request", null, asList("method", "quantile", "0.2")),
-            new Observation(RPC, "request", null, asList("method", "bucket", "0.01")),
+            new Observation(RPC, "request", null, asList("method", "quantile", "0.5")),
-            new Observation(RPC, "request", null, asList("method", "bucket", "0.025")),
+            new Observation(RPC, "request", null, asList("method", "quantile", "0.8")),
-            new Observation(RPC, "request", null, asList("method", "bucket", "0.05")),
+            new Observation(RPC, "request", null, asList("method", "quantile", "0.95")),
-            new Observation(RPC, "request", null, asList("method", "bucket", "0.075")),
+            new Observation(RPC, "request", null, asList("method", "quantile", "0.99")),
-            new Observation(RPC, "request", null, asList("method", "bucket", "0.1")),
+            new Observation(RPC, "request", null, asList("method", "quantile", "1.0")),
-            new Observation(RPC, "request", null, asList("method", "bucket", "0.25")),
-            new Observation(RPC, "request", null, asList("method", "bucket", "0.5")),
-            new Observation(RPC, "request", null, asList("method", "bucket", "0.75")),
-            new Observation(RPC, "request", null, asList("method", "bucket", "1.0")),
-            new Observation(RPC, "request", null, asList("method", "bucket", "2.5")),
-            new Observation(RPC, "request", null, asList("method", "bucket", "5.0")),
-            new Observation(RPC, "request", null, asList("method", "bucket", "7.5")),
-            new Observation(RPC, "request", null, asList("method", "bucket", "10.0")),
-            new Observation(RPC, "request", null, asList("method", "bucket", "+Inf")),
             new Observation(RPC, "request", null, asList("method", "sum")),
             new Observation(RPC, "request", null, asList("method", "count")));
   }

pantheon/src/main/java/tech/pegasys/pantheon/controller/CliquePantheonController.java

@@ -54,6 +54,7 @@ import tech.pegasys.pantheon.ethereum.p2p.api.ProtocolManager;
 import tech.pegasys.pantheon.ethereum.p2p.config.SubProtocolConfiguration;
 import tech.pegasys.pantheon.ethereum.storage.StorageProvider;
 import tech.pegasys.pantheon.ethereum.worldstate.WorldStateStorage;
+import tech.pegasys.pantheon.metrics.MetricCategory;
 import tech.pegasys.pantheon.metrics.MetricsSystem;
 
 import java.io.IOException;
@@ -156,7 +157,8 @@ public class CliquePantheonController implements PantheonController<CliqueContex
             protocolContext,
             ethProtocolManager.ethContext(),
             syncState,
-            metricsSystem);
+            metricsSystem.createLabelledTimer(
+                MetricCategory.SYNCHRONIZER, "task", "Internal processing tasks", "taskName"));
 
     final TransactionPool transactionPool =
         TransactionPoolFactory.createTransactionPool(

pantheon/src/main/java/tech/pegasys/pantheon/controller/IbftLegacyPantheonController.java

@@ -53,6 +53,7 @@ import tech.pegasys.pantheon.ethereum.p2p.config.SubProtocolConfiguration;
 import tech.pegasys.pantheon.ethereum.p2p.wire.SubProtocol;
 import tech.pegasys.pantheon.ethereum.storage.StorageProvider;
 import tech.pegasys.pantheon.ethereum.worldstate.WorldStateStorage;
+import tech.pegasys.pantheon.metrics.MetricCategory;
 import tech.pegasys.pantheon.metrics.MetricsSystem;
 
 import java.io.IOException;
@@ -167,7 +168,8 @@ public class IbftLegacyPantheonController implements PantheonController<IbftCont
             protocolContext,
             ethProtocolManager.ethContext(),
             syncState,
-            metricsSystem);
+            metricsSystem.createLabelledTimer(
+                MetricCategory.SYNCHRONIZER, "task", "Internal processing tasks", "taskName"));
 
     final Runnable closer =
         () -> {

pantheon/src/main/java/tech/pegasys/pantheon/controller/IbftPantheonController.java

@@ -61,6 +61,7 @@ import tech.pegasys.pantheon.ethereum.p2p.config.SubProtocolConfiguration;
 import tech.pegasys.pantheon.ethereum.p2p.wire.SubProtocol;
 import tech.pegasys.pantheon.ethereum.storage.StorageProvider;
 import tech.pegasys.pantheon.ethereum.worldstate.WorldStateStorage;
+import tech.pegasys.pantheon.metrics.MetricCategory;
 import tech.pegasys.pantheon.metrics.MetricsSystem;
 
 import java.io.IOException;
@@ -164,7 +165,8 @@ public class IbftPantheonController implements PantheonController<IbftContext> {
             protocolContext,
             ethProtocolManager.ethContext(),
             syncState,
-            metricsSystem);
+            metricsSystem.createLabelledTimer(
+                MetricCategory.SYNCHRONIZER, "task", "Internal processing tasks", "taskName"));
 
     final TransactionPool transactionPool =
         TransactionPoolFactory.createTransactionPool(

pantheon/src/main/java/tech/pegasys/pantheon/controller/MainnetPantheonController.java

@@ -41,6 +41,7 @@ import tech.pegasys.pantheon.ethereum.mainnet.ProtocolSchedule;
 import tech.pegasys.pantheon.ethereum.p2p.api.ProtocolManager;
 import tech.pegasys.pantheon.ethereum.p2p.config.SubProtocolConfiguration;
 import tech.pegasys.pantheon.ethereum.storage.StorageProvider;
+import tech.pegasys.pantheon.metrics.MetricCategory;
 import tech.pegasys.pantheon.metrics.MetricsSystem;
 
 import java.io.IOException;
@@ -129,7 +130,8 @@ public class MainnetPantheonController implements PantheonController<Void> {
             protocolContext,
             ethProtocolManager.ethContext(),
             syncState,
-            metricsSystem);
+            metricsSystem.createLabelledTimer(
+                MetricCategory.SYNCHRONIZER, "task", "Internal processing tasks", "taskName"));
 
     final TransactionPool transactionPool =
         TransactionPoolFactory.createTransactionPool(