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profiler.go
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70 lines (63 loc) · 1.83 KB
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/*
* Copyright 2018 The CovenantSQL Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package utils
import (
"os"
"runtime"
"runtime/pprof"
"github.com/CovenantSQL/CovenantSQL/utils/log"
)
var prof struct {
cpu *os.File
mem *os.File
}
// StartProfile initializes the CPU and memory profile, if specified.
func StartProfile(cpuprofile, memprofile string) error {
if cpuprofile != "" {
f, err := os.Create(cpuprofile)
if err != nil {
log.WithField("file", cpuprofile).WithError(err).Error("failed to create CPU profile file")
return err
}
log.WithField("file", cpuprofile).Info("writing CPU profiling to file")
prof.cpu = f
pprof.StartCPUProfile(prof.cpu)
}
if memprofile != "" {
f, err := os.Create(memprofile)
if err != nil {
log.WithField("file", memprofile).WithError(err).Error("failed to create memory profile file")
return err
}
log.WithField("file", memprofile).WithError(err).Info("writing memory profiling to file")
prof.mem = f
runtime.MemProfileRate = 4096
}
return nil
}
// StopProfile closes the CPU and memory profiles if they are running.
func StopProfile() {
if prof.cpu != nil {
pprof.StopCPUProfile()
prof.cpu.Close()
log.Info("CPU profiling stopped")
}
if prof.mem != nil {
pprof.WriteHeapProfile(prof.mem)
prof.mem.Close()
log.Info("memory profiling stopped")
}
}