134 lines
3.3 KiB
Go
134 lines
3.3 KiB
Go
// Copyright 2015 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
// +build !plan9
|
|
|
|
// The stress utility is intended for catching sporadic failures.
|
|
// It runs a given process in parallel in a loop and collects any failures.
|
|
// Usage:
|
|
// $ stress ./fmt.test -test.run=TestSometing -test.cpu=10
|
|
// You can also specify a number of parallel processes with -p flag;
|
|
// instruct the utility to not kill hanged processes for gdb attach;
|
|
// or specify the failure output you are looking for (if you want to
|
|
// ignore some other sporadic failures).
|
|
package main
|
|
|
|
import (
|
|
"flag"
|
|
"fmt"
|
|
"io/ioutil"
|
|
"os"
|
|
"os/exec"
|
|
"regexp"
|
|
"runtime"
|
|
"syscall"
|
|
"time"
|
|
)
|
|
|
|
var (
|
|
flagP = flag.Int("p", runtime.NumCPU(), "run `N` processes in parallel")
|
|
flagTimeout = flag.Duration("timeout", 10*time.Minute, "timeout each process after `duration`")
|
|
flagKill = flag.Bool("kill", true, "kill timed out processes if true, otherwise just print pid (to attach with gdb)")
|
|
flagFailure = flag.String("failure", "", "fail only if output matches `regexp`")
|
|
flagIgnore = flag.String("ignore", "", "ignore failure if output matches `regexp`")
|
|
)
|
|
|
|
func init() {
|
|
flag.Usage = func() {
|
|
os.Stderr.WriteString(`The stress utility is intended for catching sporadic failures.
|
|
It runs a given process in parallel in a loop and collects any failures.
|
|
Usage:
|
|
|
|
$ stress ./fmt.test -test.run=TestSometing -test.cpu=10
|
|
|
|
`)
|
|
flag.PrintDefaults()
|
|
}
|
|
}
|
|
|
|
func main() {
|
|
flag.Parse()
|
|
if *flagP <= 0 || *flagTimeout <= 0 || len(flag.Args()) == 0 {
|
|
flag.Usage()
|
|
os.Exit(1)
|
|
}
|
|
var failureRe, ignoreRe *regexp.Regexp
|
|
if *flagFailure != "" {
|
|
var err error
|
|
if failureRe, err = regexp.Compile(*flagFailure); err != nil {
|
|
fmt.Println("bad failure regexp:", err)
|
|
os.Exit(1)
|
|
}
|
|
}
|
|
if *flagIgnore != "" {
|
|
var err error
|
|
if ignoreRe, err = regexp.Compile(*flagIgnore); err != nil {
|
|
fmt.Println("bad ignore regexp:", err)
|
|
os.Exit(1)
|
|
}
|
|
}
|
|
res := make(chan []byte)
|
|
for i := 0; i < *flagP; i++ {
|
|
go func() {
|
|
for {
|
|
cmd := exec.Command(flag.Args()[0], flag.Args()[1:]...)
|
|
done := make(chan bool)
|
|
if *flagTimeout > 0 {
|
|
go func() {
|
|
select {
|
|
case <-done:
|
|
return
|
|
case <-time.After(*flagTimeout):
|
|
}
|
|
if !*flagKill {
|
|
fmt.Printf("process %v timed out\n", cmd.Process.Pid)
|
|
return
|
|
}
|
|
cmd.Process.Signal(syscall.SIGABRT)
|
|
select {
|
|
case <-done:
|
|
return
|
|
case <-time.After(10 * time.Second):
|
|
}
|
|
cmd.Process.Kill()
|
|
}()
|
|
}
|
|
out, err := cmd.CombinedOutput()
|
|
close(done)
|
|
if err != nil && (failureRe == nil || failureRe.Match(out)) && (ignoreRe == nil || !ignoreRe.Match(out)) {
|
|
out = append(out, fmt.Sprintf("\n\nERROR: %v\n", err)...)
|
|
} else {
|
|
out = []byte{}
|
|
}
|
|
res <- out
|
|
}
|
|
}()
|
|
}
|
|
runs, fails := 0, 0
|
|
ticker := time.NewTicker(5 * time.Second).C
|
|
for {
|
|
select {
|
|
case out := <-res:
|
|
runs++
|
|
if len(out) == 0 {
|
|
continue
|
|
}
|
|
fails++
|
|
f, err := ioutil.TempFile("", "go-stress")
|
|
if err != nil {
|
|
fmt.Printf("failed to create temp file: %v\n", err)
|
|
os.Exit(1)
|
|
}
|
|
f.Write(out)
|
|
f.Close()
|
|
if len(out) > 2<<10 {
|
|
out = out[:2<<10]
|
|
}
|
|
fmt.Printf("\n%s\n%s\n", f.Name(), out)
|
|
case <-ticker:
|
|
fmt.Printf("%v runs so far, %v failures\n", runs, fails)
|
|
}
|
|
}
|
|
}
|