forked from GoogleCloudPlatform/gcsfuse
/
cpu.go
71 lines (62 loc) · 1.68 KB
/
cpu.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
// Copyright 2021 Google Inc. All Rights Reserved.
//
// 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 perf
import (
"fmt"
"os"
"os/signal"
"runtime/pprof"
"syscall"
"time"
"github.com/Tulsishah/gcsfuse-tulsishah7/v2/internal/logger"
)
func HandleCPUProfileSignals() {
profileOnce := func(duration time.Duration, path string) (err error) {
// Set up the file.
var f *os.File
f, err = os.Create(path)
if err != nil {
err = fmt.Errorf("Create: %w", err)
return
}
defer func() {
closeErr := f.Close()
if err == nil {
err = closeErr
}
}()
// Profile.
err = pprof.StartCPUProfile(f)
if err != nil {
logger.Errorf("StartCPUProfile failed: %v", err)
return
}
time.Sleep(duration)
pprof.StopCPUProfile()
return
}
c := make(chan os.Signal, 1)
signal.Notify(c, syscall.SIGUSR1)
for range c {
path := fmt.Sprintf("/tmp/cpu-%d.pprof", time.Now().UnixNano())
const duration = 10 * time.Second
logger.Infof("Writing %v CPU profile to %s...", duration, path)
err := profileOnce(duration, path)
if err == nil {
logger.Infof("Done writing CPU profile to %s.", path)
} else {
logger.Infof("Error writing CPU profile: %v", err)
}
}
}