blob: bc00741ba37e216225ea2a5739179f2b938065a6 [file] [log] [blame]
// 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.
// Busybench is a tool that runs a benchmark with the profiler enabled.
package main
import (
"bytes"
"compress/gzip"
"flag"
"log"
"math/rand"
"runtime"
"sync"
"time"
"cloud.google.com/go/profiler"
)
var (
service = flag.String("service", "", "service name")
serviceVersion = flag.String("service_version", "1.0.0", "service version")
mutexProfiling = flag.Bool("mutex_profiling", false, "enable mutex profiling")
duration = flag.Int("duration", 200, "duration of the benchmark in seconds")
apiAddr = flag.String("api_address", "", "API address of the profiler (e.g. 'cloudprofiler.googleapis.com:443')")
projectID = flag.String("project_id", "", "cloud project ID")
numBusyworkers = flag.Int("num_busyworkers", 20, "number of busyworkers to run in parallel")
)
// busywork continuously generates 1MiB of random data and compresses it
// throwing away the result.
func busywork(mu *sync.Mutex) {
start := time.Now()
dur := time.Duration(*duration) * time.Second
for time.Since(start) < dur || dur == 0 {
busyworkOnce(mu)
}
}
func busyworkOnce(mu *sync.Mutex) {
data := make([]byte, 128*1024)
rand.Read(data)
// Grab the mutex after the allocation above is done so that
// there are a number of outstanding allocations. This makes
// the live heap profiles consistently non-empty.
mu.Lock()
defer mu.Unlock()
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()
log.Printf("busybench using %s.", runtime.Version())
if *service == "" {
log.Print("Service name must be configured using --service flag.")
return
}
if err := profiler.Start(profiler.Config{Service: *service,
MutexProfiling: *mutexProfiling,
ServiceVersion: *serviceVersion,
DebugLogging: true,
APIAddr: *apiAddr,
ProjectID: *projectID}); err != nil {
log.Printf("Failed to start the profiler: %v", err)
return
}
var mu sync.Mutex
var wg sync.WaitGroup
wg.Add(*numBusyworkers)
runtime.GOMAXPROCS(*numBusyworkers)
for i := 0; i < *numBusyworkers; i++ {
go func() {
defer wg.Done()
busywork(&mu)
}()
}
wg.Wait()
}