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62 lines
1.4 KiB
Go
62 lines
1.4 KiB
Go
package stat
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import (
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"runtime"
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"sync/atomic"
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"time"
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"github.com/tal-tech/go-zero/core/logx"
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"github.com/tal-tech/go-zero/core/stat/internal"
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"github.com/tal-tech/go-zero/core/threading"
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)
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const (
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// 250ms and 0.95 as beta will count the average cpu load for past 5 seconds
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cpuRefreshInterval = time.Millisecond * 250
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allRefreshInterval = time.Minute
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// moving average beta hyperparameter
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beta = 0.95
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)
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var cpuUsage int64
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func init() {
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go func() {
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cpuTicker := time.NewTicker(cpuRefreshInterval)
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defer cpuTicker.Stop()
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allTicker := time.NewTicker(allRefreshInterval)
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defer allTicker.Stop()
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for {
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select {
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case <-cpuTicker.C:
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threading.RunSafe(func() {
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curUsage := internal.RefreshCpu()
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prevUsage := atomic.LoadInt64(&cpuUsage)
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// cpu = cpuᵗ⁻¹ * beta + cpuᵗ * (1 - beta)
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usage := int64(float64(prevUsage)*beta + float64(curUsage)*(1-beta))
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atomic.StoreInt64(&cpuUsage, usage)
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})
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case <-allTicker.C:
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printUsage()
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}
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}
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}()
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}
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// CpuUsage returns current cpu usage.
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func CpuUsage() int64 {
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return atomic.LoadInt64(&cpuUsage)
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}
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func bToMb(b uint64) float32 {
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return float32(b) / 1024 / 1024
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}
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func printUsage() {
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var m runtime.MemStats
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runtime.ReadMemStats(&m)
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logx.Statf("CPU: %dm, MEMORY: Alloc=%.1fMi, TotalAlloc=%.1fMi, Sys=%.1fMi, NumGC=%d",
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CpuUsage(), bToMb(m.Alloc), bToMb(m.TotalAlloc), bToMb(m.Sys), m.NumGC)
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}
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