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runtime.go
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package goappmonitor
import (
"runtime"
"time"
"github.com/wgliang/metrics"
)
var (
memStats runtime.MemStats
runtimeMetrics RuntimeMetrics
frees uint64
lookups uint64
mallocs uint64
numGC uint32
numCgoCalls int64
)
// Collect runtime memeory-data:CollectRuntimeMemStats.
func CollectRuntimeMemStats(r metrics.Collectry, d time.Duration) {
collectRuntimeMemStats(r)
go captureRuntimeMemStats(r, d)
}
// Capture runtime memeory-data.
func captureRuntimeMemStats(r metrics.Collectry, d time.Duration) {
for _ = range time.Tick(d) {
captureRuntimeMemStatsWorker(r)
}
}
// Capture runtime memeory-data worker.
func captureRuntimeMemStatsWorker(r metrics.Collectry) {
t := time.Now()
runtime.ReadMemStats(&memStats)
runtimeMetrics.ReadMemStats.Update(int64(time.Since(t)))
runtimeMetrics.MemStats.Alloc.Update(int64(memStats.Alloc))
runtimeMetrics.MemStats.BuckHashSys.Update(int64(memStats.BuckHashSys))
if memStats.DebugGC {
runtimeMetrics.MemStats.DebugGC.Update(1)
} else {
runtimeMetrics.MemStats.DebugGC.Update(0)
}
if memStats.EnableGC {
runtimeMetrics.MemStats.EnableGC.Update(1)
} else {
runtimeMetrics.MemStats.EnableGC.Update(0)
}
runtimeMetrics.MemStats.Frees.Update(int64(memStats.Frees - frees))
runtimeMetrics.MemStats.HeapAlloc.Update(int64(memStats.HeapAlloc))
runtimeMetrics.MemStats.HeapIdle.Update(int64(memStats.HeapIdle))
runtimeMetrics.MemStats.HeapInuse.Update(int64(memStats.HeapInuse))
runtimeMetrics.MemStats.HeapObjects.Update(int64(memStats.HeapObjects))
runtimeMetrics.MemStats.HeapReleased.Update(int64(memStats.HeapReleased))
runtimeMetrics.MemStats.HeapSys.Update(int64(memStats.HeapSys))
runtimeMetrics.MemStats.LastGC.Update(int64(memStats.LastGC))
runtimeMetrics.MemStats.Lookups.Update(int64(memStats.Lookups - lookups))
runtimeMetrics.MemStats.Mallocs.Update(int64(memStats.Mallocs - mallocs))
runtimeMetrics.MemStats.MCacheInuse.Update(int64(memStats.MCacheInuse))
runtimeMetrics.MemStats.MCacheSys.Update(int64(memStats.MCacheSys))
runtimeMetrics.MemStats.MSpanInuse.Update(int64(memStats.MSpanInuse))
runtimeMetrics.MemStats.MSpanSys.Update(int64(memStats.MSpanSys))
runtimeMetrics.MemStats.NextGC.Update(int64(memStats.NextGC))
runtimeMetrics.MemStats.NumGC.Update(int64(memStats.NumGC - numGC))
runtimeMetrics.MemStats.GCCPUFraction.Update(gcCPUFraction(&memStats))
i := numGC % uint32(len(memStats.PauseNs))
ii := memStats.NumGC % uint32(len(memStats.PauseNs))
if memStats.NumGC-numGC >= uint32(len(memStats.PauseNs)) {
for i = 0; i < uint32(len(memStats.PauseNs)); i++ {
runtimeMetrics.MemStats.PauseNs.Update(int64(memStats.PauseNs[i]))
}
} else {
if i > ii {
for ; i < uint32(len(memStats.PauseNs)); i++ {
runtimeMetrics.MemStats.PauseNs.Update(int64(memStats.PauseNs[i]))
}
i = 0
}
for ; i < ii; i++ {
runtimeMetrics.MemStats.PauseNs.Update(int64(memStats.PauseNs[i]))
}
}
frees = memStats.Frees
lookups = memStats.Lookups
mallocs = memStats.Mallocs
numGC = memStats.NumGC
runtimeMetrics.MemStats.PauseTotalNs.Update(int64(memStats.PauseTotalNs))
runtimeMetrics.MemStats.StackInuse.Update(int64(memStats.StackInuse))
runtimeMetrics.MemStats.StackSys.Update(int64(memStats.StackSys))
runtimeMetrics.MemStats.Sys.Update(int64(memStats.Sys))
runtimeMetrics.MemStats.TotalAlloc.Update(int64(memStats.TotalAlloc))
currentNumCgoCalls := numCgoCall()
runtimeMetrics.NumCgoCall.Update(currentNumCgoCalls - numCgoCalls)
numCgoCalls = currentNumCgoCalls
runtimeMetrics.NumGoroutine.Update(int64(runtime.NumGoroutine()))
}
// Collect runtime memory stats.
func collectRuntimeMemStats(r metrics.Collectry) {
runtimeMetrics.MemStats.Alloc = metrics.NewGauge()
runtimeMetrics.MemStats.BuckHashSys = metrics.NewGauge()
runtimeMetrics.MemStats.DebugGC = metrics.NewGauge()
runtimeMetrics.MemStats.EnableGC = metrics.NewGauge()
runtimeMetrics.MemStats.Frees = metrics.NewGauge()
runtimeMetrics.MemStats.HeapAlloc = metrics.NewGauge()
runtimeMetrics.MemStats.HeapIdle = metrics.NewGauge()
runtimeMetrics.MemStats.HeapInuse = metrics.NewGauge()
runtimeMetrics.MemStats.HeapObjects = metrics.NewGauge()
runtimeMetrics.MemStats.HeapReleased = metrics.NewGauge()
runtimeMetrics.MemStats.HeapSys = metrics.NewGauge()
runtimeMetrics.MemStats.LastGC = metrics.NewGauge()
runtimeMetrics.MemStats.Lookups = metrics.NewGauge()
runtimeMetrics.MemStats.Mallocs = metrics.NewGauge()
runtimeMetrics.MemStats.MCacheInuse = metrics.NewGauge()
runtimeMetrics.MemStats.MCacheSys = metrics.NewGauge()
runtimeMetrics.MemStats.MSpanInuse = metrics.NewGauge()
runtimeMetrics.MemStats.MSpanSys = metrics.NewGauge()
runtimeMetrics.MemStats.NextGC = metrics.NewGauge()
runtimeMetrics.MemStats.NumGC = metrics.NewGauge()
runtimeMetrics.MemStats.GCCPUFraction = metrics.NewGaugeFloat64()
runtimeMetrics.MemStats.PauseNs = metrics.NewHistogram(metrics.NewExpDecaySample(1028, 0.015))
runtimeMetrics.MemStats.PauseTotalNs = metrics.NewGauge()
runtimeMetrics.MemStats.StackInuse = metrics.NewGauge()
runtimeMetrics.MemStats.StackSys = metrics.NewGauge()
runtimeMetrics.MemStats.Sys = metrics.NewGauge()
runtimeMetrics.MemStats.TotalAlloc = metrics.NewGauge()
runtimeMetrics.NumCgoCall = metrics.NewGauge()
runtimeMetrics.NumGoroutine = metrics.NewGauge()
runtimeMetrics.ReadMemStats = metrics.NewHistogram(metrics.NewExpDecaySample(1028, 0.015))
r.Collector("runtime.MemStats.Alloc", runtimeMetrics.MemStats.Alloc)
r.Collector("runtime.MemStats.BuckHashSys", runtimeMetrics.MemStats.BuckHashSys)
r.Collector("runtime.MemStats.DebugGC", runtimeMetrics.MemStats.DebugGC)
r.Collector("runtime.MemStats.EnableGC", runtimeMetrics.MemStats.EnableGC)
r.Collector("runtime.MemStats.Frees", runtimeMetrics.MemStats.Frees)
r.Collector("runtime.MemStats.HeapAlloc", runtimeMetrics.MemStats.HeapAlloc)
r.Collector("runtime.MemStats.HeapIdle", runtimeMetrics.MemStats.HeapIdle)
r.Collector("runtime.MemStats.HeapInuse", runtimeMetrics.MemStats.HeapInuse)
r.Collector("runtime.MemStats.HeapObjects", runtimeMetrics.MemStats.HeapObjects)
r.Collector("runtime.MemStats.HeapReleased", runtimeMetrics.MemStats.HeapReleased)
r.Collector("runtime.MemStats.HeapSys", runtimeMetrics.MemStats.HeapSys)
r.Collector("runtime.MemStats.LastGC", runtimeMetrics.MemStats.LastGC)
r.Collector("runtime.MemStats.Lookups", runtimeMetrics.MemStats.Lookups)
r.Collector("runtime.MemStats.Mallocs", runtimeMetrics.MemStats.Mallocs)
r.Collector("runtime.MemStats.MCacheInuse", runtimeMetrics.MemStats.MCacheInuse)
r.Collector("runtime.MemStats.MCacheSys", runtimeMetrics.MemStats.MCacheSys)
r.Collector("runtime.MemStats.MSpanInuse", runtimeMetrics.MemStats.MSpanInuse)
r.Collector("runtime.MemStats.MSpanSys", runtimeMetrics.MemStats.MSpanSys)
r.Collector("runtime.MemStats.NextGC", runtimeMetrics.MemStats.NextGC)
r.Collector("runtime.MemStats.NumGC", runtimeMetrics.MemStats.NumGC)
r.Collector("runtime.MemStats.GCCPUFraction", runtimeMetrics.MemStats.GCCPUFraction)
r.Collector("runtime.MemStats.PauseNs", runtimeMetrics.MemStats.PauseNs)
r.Collector("runtime.MemStats.PauseTotalNs", runtimeMetrics.MemStats.PauseTotalNs)
r.Collector("runtime.MemStats.StackInuse", runtimeMetrics.MemStats.StackInuse)
r.Collector("runtime.MemStats.StackSys", runtimeMetrics.MemStats.StackSys)
r.Collector("runtime.MemStats.Sys", runtimeMetrics.MemStats.Sys)
r.Collector("runtime.MemStats.TotalAlloc", runtimeMetrics.MemStats.TotalAlloc)
r.Collector("runtime.NumCgoCall", runtimeMetrics.NumCgoCall)
r.Collector("runtime.NumGoroutine", runtimeMetrics.NumGoroutine)
r.Collector("runtime.ReadMemStats", runtimeMetrics.ReadMemStats)
}
// Cgo call
func numCgoCall() int64 {
return 0
}
// gcCPUFraction call
func gcCPUFraction(memStats *runtime.MemStats) float64 {
return memStats.GCCPUFraction
}