124 lines
2.7 KiB
Go
124 lines
2.7 KiB
Go
package utils
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import (
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"fmt"
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"io"
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"log"
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"os"
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"runtime"
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"runtime/debug"
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"runtime/pprof"
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"strconv"
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"time"
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)
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var startTime = time.Now()
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var pid int
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func init() {
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pid = os.Getpid()
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}
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type RuntimeStats struct {
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CountGoroutine int
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CountHeap int
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CountThread int
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CountBlock int
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}
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func ProcessInput(input string, w io.Writer) {
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switch input {
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case "lookup goroutine":
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p := pprof.Lookup("goroutine")
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p.WriteTo(w, 2)
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case "lookup heap":
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p := pprof.Lookup("heap")
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p.WriteTo(w, 2)
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case "lookup threadcreate":
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p := pprof.Lookup("threadcreate")
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p.WriteTo(w, 2)
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case "lookup block":
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p := pprof.Lookup("block")
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p.WriteTo(w, 2)
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case "start cpuprof":
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StartCPUProfile()
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case "stop cpuprof":
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StopCPUProfile()
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case "get memprof":
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MemProf()
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case "gc summary":
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PrintGCSummary(w)
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}
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}
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func MemProf() {
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if f, err := os.Create("mem-" + strconv.Itoa(pid) + ".memprof"); err != nil {
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log.Fatal("record memory profile failed: %v", err)
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} else {
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runtime.GC()
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defer f.Close()
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pprof.WriteHeapProfile(f)
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}
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}
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func StartCPUProfile() {
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f, err := os.Create("cpu-" + strconv.Itoa(pid) + ".pprof")
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if err != nil {
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log.Fatal(err)
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}
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pprof.StartCPUProfile(f)
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}
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func StopCPUProfile() {
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pprof.StopCPUProfile()
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}
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func PrintGCSummary(w io.Writer) {
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memStats := &runtime.MemStats{}
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runtime.ReadMemStats(memStats)
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gcstats := &debug.GCStats{PauseQuantiles: make([]time.Duration, 100)}
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debug.ReadGCStats(gcstats)
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printGC(memStats, gcstats, w)
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}
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func printGC(memStats *runtime.MemStats, gcstats *debug.GCStats, w io.Writer) {
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if gcstats.NumGC > 0 {
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lastPause := gcstats.Pause[0]
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elapsed := time.Now().Sub(startTime)
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overhead := float64(gcstats.PauseTotal) / float64(elapsed) * 100
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allocatedRate := float64(memStats.TotalAlloc) / elapsed.Seconds()
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fmt.Fprintf(w, "NumGC:%d Pause:%s Pause(Avg):%s Overhead:%3.2f%% Alloc:%s Sys:%s Alloc(Rate):%s/s Histogram:%s %s %s \n",
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gcstats.NumGC,
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ToS(lastPause),
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ToS(Avg(gcstats.Pause)),
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overhead,
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ToH(memStats.Alloc),
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ToH(memStats.Sys),
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ToH(uint64(allocatedRate)),
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ToS(gcstats.PauseQuantiles[94]),
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ToS(gcstats.PauseQuantiles[98]),
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ToS(gcstats.PauseQuantiles[99]))
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} else {
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// while GC has disabled
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elapsed := time.Now().Sub(startTime)
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allocatedRate := float64(memStats.TotalAlloc) / elapsed.Seconds()
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fmt.Fprintf(w, "Alloc:%s Sys:%s Alloc(Rate):%s/s\n",
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ToH(memStats.Alloc),
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ToH(memStats.Sys),
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ToH(uint64(allocatedRate)))
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}
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}
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func StatsRuntime() RuntimeStats {
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stats := RuntimeStats{}
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stats.CountGoroutine = runtime.NumGoroutine()
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stats.CountThread, _ = runtime.ThreadCreateProfile(nil)
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stats.CountHeap, _ = runtime.MemProfile(nil, true)
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stats.CountBlock, _ = runtime.BlockProfile(nil)
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return stats
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}
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