mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-12-24 05:50:22 +00:00
89 lines
2.0 KiB
Go
89 lines
2.0 KiB
Go
|
/*
|
||
|
|
Copyright 2017 The Kubernetes 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 cmd
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
"os"
|
||
|
|
"runtime"
|
||
|
|
"runtime/pprof"
|
||
|
|
|
||
|
|
"github.com/spf13/pflag"
|
||
|
|
)
|
||
|
|
|
||
|
|
var (
|
||
|
|
profileName string
|
||
|
|
profileOutput string
|
||
|
|
)
|
||
|
|
|
||
|
|
func addProfilingFlags(flags *pflag.FlagSet) {
|
||
|
|
flags.StringVar(&profileName, "profile", "none", "Name of profile to capture. One of (none|cpu|heap|goroutine|threadcreate|block|mutex)")
|
||
|
|
flags.StringVar(&profileOutput, "profile-output", "profile.pprof", "Name of the file to write the profile to")
|
||
|
|
}
|
||
|
|
|
||
|
|
func initProfiling() error {
|
||
|
|
switch profileName {
|
||
|
|
case "none":
|
||
|
|
return nil
|
||
|
|
case "cpu":
|
||
|
|
f, err := os.Create(profileOutput)
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
return pprof.StartCPUProfile(f)
|
||
|
|
// Block and mutex profiles need a call to Set{Block,Mutex}ProfileRate to
|
||
|
|
// output anything. We choose to sample all events.
|
||
|
|
case "block":
|
||
|
|
runtime.SetBlockProfileRate(1)
|
||
|
|
return nil
|
||
|
|
case "mutex":
|
||
|
|
runtime.SetMutexProfileFraction(1)
|
||
|
|
return nil
|
||
|
|
default:
|
||
|
|
// Check the profile name is valid.
|
||
|
|
if profile := pprof.Lookup(profileName); profile == nil {
|
||
|
|
return fmt.Errorf("unknown profile '%s'", profileName)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func flushProfiling() error {
|
||
|
|
switch profileName {
|
||
|
|
case "none":
|
||
|
|
return nil
|
||
|
|
case "cpu":
|
||
|
|
pprof.StopCPUProfile()
|
||
|
|
case "heap":
|
||
|
|
runtime.GC()
|
||
|
|
fallthrough
|
||
|
|
default:
|
||
|
|
profile := pprof.Lookup(profileName)
|
||
|
|
if profile == nil {
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
f, err := os.Create(profileOutput)
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
profile.WriteTo(f, 0)
|
||
|
|
}
|
||
|
|
|
||
|
|
return nil
|
||
|
|
}
|