| /* |
| Copyright 2016 The Kubernetes Authors. |
| |
| 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 cache |
| |
| import ( |
| "sync" |
| "testing" |
| "time" |
| |
| "k8s.io/apimachinery/pkg/util/wait" |
| ) |
| |
| const ( |
| concurrencyLevel = 5 |
| ) |
| |
| func BenchmarkListener(b *testing.B) { |
| var notification addNotification |
| |
| var swg sync.WaitGroup |
| swg.Add(b.N) |
| b.SetParallelism(concurrencyLevel) |
| // Preallocate enough space so that benchmark does not run out of it |
| pl := newProcessListener(&ResourceEventHandlerFuncs{ |
| AddFunc: func(obj interface{}) { |
| swg.Done() |
| }, |
| }, 0, 0, time.Now(), 1024*1024) |
| var wg wait.Group |
| defer wg.Wait() // Wait for .run and .pop to stop |
| defer close(pl.addCh) // Tell .run and .pop to stop |
| wg.Start(pl.run) |
| wg.Start(pl.pop) |
| |
| b.ReportAllocs() |
| b.ResetTimer() |
| b.RunParallel(func(pb *testing.PB) { |
| for pb.Next() { |
| pl.add(notification) |
| } |
| }) |
| swg.Wait() // Block until all notifications have been received |
| b.StopTimer() |
| } |