Current File : //home/waritko/go/src/cloud.google.com/go/profiler/busybench/busybench.go
// Copyright 2017 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 main
import (
"bytes"
"cloud.google.com/go/profiler"
"compress/gzip"
"flag"
"log"
"math/rand"
"sync"
"time"
)
var (
service = flag.String("service", "", "service name")
mutexProfiling = flag.Bool("mutex_profiling", false, "enable mutex profiling")
duration = flag.Int("duration", 600, "duration of the benchmark in seconds")
apiAddr = flag.String("api_address", "", "API address of the profiler (e.g. 'cloudprofiler.googleapis.com:443')")
)
// busywork continuously generates 1MiB of random data and compresses it
// throwing away the result.
func busywork(mu *sync.Mutex) {
ticker := time.NewTicker(time.Duration(*duration) * time.Second)
defer ticker.Stop()
for {
select {
case <-ticker.C:
return
default:
mu.Lock()
busyworkOnce()
mu.Unlock()
}
}
}
func busyworkOnce() {
data := make([]byte, 1024*1024)
rand.Read(data)
var b bytes.Buffer
gz := gzip.NewWriter(&b)
if _, err := gz.Write(data); err != nil {
log.Printf("Failed to write to gzip stream: %v", err)
return
}
if err := gz.Flush(); err != nil {
log.Printf("Failed to flush to gzip stream: %v", err)
return
}
if err := gz.Close(); err != nil {
log.Printf("Failed to close gzip stream: %v", err)
}
// Throw away the result.
}
func main() {
flag.Parse()
if *service == "" {
log.Print("Service name must be configured using --service flag.")
} else if err := profiler.Start(
profiler.Config{
Service: *service,
MutexProfiling: *mutexProfiling,
DebugLogging: true,
APIAddr: *apiAddr,
}); err != nil {
log.Printf("Failed to start the profiler: %v", err)
} else {
mu := new(sync.Mutex)
var wg sync.WaitGroup
wg.Add(5)
for i := 0; i < 5; i++ {
go func() {
defer wg.Done()
busywork(mu)
}()
}
wg.Wait()
}
log.Printf("busybench finished profiling.")
// Do not exit, since the pod in the GKE test is set to always restart.
select {}
}
Mini Shell