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- // Copyright 2017 Google LLC
- //
- // 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()
- defer log.Printf("busybench finished profiling.")
-
- if *service == "" {
- log.Print("Service name must be configured using --service flag.")
- return
- }
- 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)
- return
- }
- 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()
- }
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