The core protocol of WoopChain
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woop/internal/memprofiling/lib.go

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package memprofiling
import (
"fmt"
"net/http"
"reflect"
"sync"
"time"
"github.com/fjl/memsize"
"github.com/fjl/memsize/memsizeui"
nodeconfig "github.com/harmony-one/harmony/internal/configs/node"
"github.com/harmony-one/harmony/internal/utils"
)
// Constants for mem profiling.
const (
MemProfilingPortDiff = 1000
// Constants of for scanning mem size.
memSizeScanTime = 30 * time.Second
)
// MemProfiling is the struct of MemProfiling.
type MemProfiling struct {
h *memsizeui.Handler
s *http.Server
observedObject map[string]interface{}
mu sync.Mutex
}
// New returns MemProfiling object.
func New() *MemProfiling {
return &MemProfiling{
observedObject: map[string]interface{}{},
5 years ago
h: new(memsizeui.Handler),
}
}
// Config configures mem profiling.
func (m *MemProfiling) Config() {
m.s = &http.Server{
Addr: fmt.Sprintf("%s:%s", nodeconfig.GetDefaultConfig().IP, utils.GetPortFromDiff(nodeconfig.GetDefaultConfig().Port, MemProfilingPortDiff)),
Handler: m.h,
}
utils.GetLogInstance().Info("running mem profiling", "port", utils.GetPortFromDiff(nodeconfig.GetDefaultConfig().Port, MemProfilingPortDiff))
}
// Add adds variables to watch for profiling.
func (m *MemProfiling) Add(name string, v interface{}) {
m.mu.Lock()
defer m.mu.Unlock()
if v != nil {
rv := reflect.ValueOf(v)
if !(rv.Kind() != reflect.Ptr || rv.IsNil()) {
m.h.Add(name, v)
m.observedObject[name] = v
}
}
}
// Start starts profiling server.
func (m *MemProfiling) Start() {
go m.s.ListenAndServe()
m.PeriodicallyScanMemSize()
utils.GetLogInstance().Info("Start memprofiling.")
}
// Stop stops mem profiling.
func (m *MemProfiling) Stop() {
m.s.Shutdown(nil)
}
// PeriodicallyScanMemSize scans memsize of the observed objects every 30 seconds.
func (m *MemProfiling) PeriodicallyScanMemSize() {
go func() {
for {
select {
case <-time.After(memSizeScanTime):
m.mu.Lock()
m := GetMemProfiling()
for k, v := range m.observedObject {
s := memsize.Scan(v)
r := s.Report()
utils.GetLogInstance().Info("memsize report for " + k + r)
}
m.mu.Unlock()
}
}
}()
}