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52 lines
1.2 KiB
Go
52 lines
1.2 KiB
Go
package main
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import (
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"log"
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"os"
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"runtime"
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"runtime/pprof"
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)
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// prof stores the file locations of active profiles.
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var prof struct {
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cpu *os.File
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mem *os.File
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}
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// startProfile initializes the CPU and memory profile, if specified.
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func startProfile(cpuprofile, memprofile string) {
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if cpuprofile != "" {
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f, err := os.Create(cpuprofile)
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if err != nil {
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log.Fatalf("failed to create CPU profile file at %s: %s", cpuprofile, err.Error())
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}
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log.Printf("writing CPU profile to: %s\n", cpuprofile)
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prof.cpu = f
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pprof.StartCPUProfile(prof.cpu)
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}
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if memprofile != "" {
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f, err := os.Create(memprofile)
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if err != nil {
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log.Fatalf("failed to create memory profile file at %s: %s", cpuprofile, err.Error())
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}
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log.Printf("writing memory profile to: %s\n", memprofile)
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prof.mem = f
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runtime.MemProfileRate = 4096
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}
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}
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// stopProfile closes the CPU and memory profiles if they are running.
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func stopProfile() {
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if prof.cpu != nil {
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pprof.StopCPUProfile()
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prof.cpu.Close()
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log.Println("CPU profiling stopped")
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}
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if prof.mem != nil {
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pprof.Lookup("heap").WriteTo(prof.mem, 0)
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prof.mem.Close()
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log.Println("memory profiling stopped")
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}
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}
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