github.com/maypok86/otter@v1.2.1/internal/queue/queue_bench_test.go (about)

     1  // Copyright (c) 2024 Alexey Mayshev. All rights reserved.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package queue
    16  
    17  import (
    18  	"runtime"
    19  	"sync/atomic"
    20  	"testing"
    21  )
    22  
    23  func benchmarkProdCons(b *testing.B, push func(int), pop func() int, queueSize, localWork int) {
    24  	b.Helper()
    25  
    26  	callsPerSched := queueSize
    27  	procs := runtime.GOMAXPROCS(-1) / 2
    28  	if procs == 0 {
    29  		procs = 1
    30  	}
    31  	N := int32(b.N / callsPerSched)
    32  	c := make(chan bool, 2*procs)
    33  	for p := 0; p < procs; p++ {
    34  		go func() {
    35  			foo := 0
    36  			for atomic.AddInt32(&N, -1) >= 0 {
    37  				for g := 0; g < callsPerSched; g++ {
    38  					for i := 0; i < localWork; i++ {
    39  						foo *= 2
    40  						foo /= 2
    41  					}
    42  					push(1)
    43  				}
    44  			}
    45  			push(0)
    46  			c <- foo == 42
    47  		}()
    48  		go func() {
    49  			foo := 0
    50  			for {
    51  				v := pop()
    52  				if v == 0 {
    53  					break
    54  				}
    55  				for i := 0; i < localWork; i++ {
    56  					foo *= 2
    57  					foo /= 2
    58  				}
    59  			}
    60  			c <- foo == 42
    61  		}()
    62  	}
    63  	for p := 0; p < procs; p++ {
    64  		<-c
    65  		<-c
    66  	}
    67  }
    68  
    69  func BenchmarkGrowableProdConsWork100(b *testing.B) {
    70  	length := 128 * 16
    71  	g := NewGrowable[int](uint32(length), uint32(length))
    72  	b.ResetTimer()
    73  	benchmarkProdCons(b, func(i int) {
    74  		g.Push(i)
    75  	}, func() int {
    76  		return g.Pop()
    77  	}, length, 100)
    78  }
    79  
    80  func BenchmarkChanProdConsWork100(b *testing.B) {
    81  	length := 128 * 16
    82  	c := make(chan int, length)
    83  	benchmarkProdCons(b, func(i int) {
    84  		c <- i
    85  	}, func() int {
    86  		return <-c
    87  	}, length, 100)
    88  }