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|
package main
import (
"fmt"
"log"
"os"
"runtime"
"time"
"github.com/performancecopilot/speed/v4"
)
// refresh interval
const interval = time.Millisecond
// list of memory-related metric domains
var memMetricInstances = []string{
"Alloc",
"TotalAlloc",
"Sys",
"Lookups",
"Mallocs",
"Frees",
"HeapAlloc",
"HeapSys",
"HeapIdle",
"HeapInuse",
"HeapReleased",
"HeapObjects",
"StackInuse",
"StackSys",
"MSpanInuse",
"MSpanSys",
"MCacheInuse",
"MCacheSys",
"BuckHashSys",
"GCSys",
"OtherSys",
"NextGC",
"LastGC",
"PauseTotalNs",
"PauseNs",
"PauseEnd",
"NumGC",
}
func main() {
cpuIndom, err := speed.NewPCPInstanceDomain(
"CPU Metrics",
[]string{"CGoCalls", "Goroutines"},
)
if err != nil {
log.Fatal("Could not create cpuIndom, error: ", err)
}
cpuMetric, err := speed.NewPCPInstanceMetric(
speed.Instances{
"CGoCalls": 0,
"Goroutines": 0,
},
"cpu",
cpuIndom,
speed.Int64Type,
speed.CounterSemantics,
speed.OneUnit,
)
if err != nil {
log.Fatal("Could not create cpuMetric, error: ", err)
}
memIndom, err := speed.NewPCPInstanceDomain("Memory Metrics", memMetricInstances)
if err != nil {
log.Fatal("Could not create memIndom, error: ", err)
}
memInsts := speed.Instances{}
for _, v := range memMetricInstances {
memInsts[v] = 0
}
memMetric, err := speed.NewPCPInstanceMetric(
memInsts,
"mem",
memIndom,
speed.Uint64Type,
speed.CounterSemantics,
speed.OneUnit,
)
if err != nil {
log.Fatal("Could not create memMetric, error: ", err)
}
client, err := speed.NewPCPClient("runtime")
if err != nil {
log.Fatal("Could not create client, error: ", err)
}
client.MustRegister(cpuMetric)
client.MustRegister(memMetric)
client.MustStart()
defer client.MustStop()
mStats := runtime.MemStats{}
c := time.Tick(interval)
go func() {
for range c {
cpuMetric.MustSetInstance(runtime.NumCgoCall(), "CGoCalls")
cpuMetric.MustSetInstance(runtime.NumGoroutine(), "Goroutines")
runtime.ReadMemStats(&mStats)
memMetric.MustSetInstance(mStats.Alloc, "Alloc")
memMetric.MustSetInstance(mStats.TotalAlloc, "TotalAlloc")
memMetric.MustSetInstance(mStats.Sys, "Sys")
memMetric.MustSetInstance(mStats.Mallocs, "Mallocs")
memMetric.MustSetInstance(mStats.Frees, "Frees")
memMetric.MustSetInstance(mStats.HeapAlloc, "HeapAlloc")
memMetric.MustSetInstance(mStats.HeapSys, "HeapSys")
memMetric.MustSetInstance(mStats.HeapIdle, "HeapIdle")
memMetric.MustSetInstance(mStats.HeapInuse, "HeapInuse")
memMetric.MustSetInstance(mStats.HeapReleased, "HeapReleased")
memMetric.MustSetInstance(mStats.HeapObjects, "HeapObjects")
memMetric.MustSetInstance(mStats.StackInuse, "StackInuse")
memMetric.MustSetInstance(mStats.StackSys, "StackSys")
memMetric.MustSetInstance(mStats.MSpanInuse, "MSpanInuse")
memMetric.MustSetInstance(mStats.MSpanSys, "MSpanSys")
memMetric.MustSetInstance(mStats.MCacheInuse, "MCacheInuse")
memMetric.MustSetInstance(mStats.MCacheSys, "MCacheSys")
memMetric.MustSetInstance(mStats.BuckHashSys, "BuckHashSys")
memMetric.MustSetInstance(mStats.GCSys, "GCSys")
memMetric.MustSetInstance(mStats.OtherSys, "OtherSys")
memMetric.MustSetInstance(mStats.NextGC, "NextGC")
memMetric.MustSetInstance(mStats.LastGC, "LastGC")
memMetric.MustSetInstance(mStats.PauseTotalNs, "PauseTotalNs")
memMetric.MustSetInstance(mStats.PauseNs[(mStats.NumGC+255)%256], "PauseNs")
memMetric.MustSetInstance(mStats.PauseEnd[(mStats.NumGC+255)%256], "PauseEnd")
memMetric.MustSetInstance(uint64(mStats.NumGC), "NumGC")
}
}()
fmt.Println("To stop the mapping, press enter")
_, _ = os.Stdin.Read(make([]byte, 1))
}
|
