bench_test.go

     1  // Copyright 2016 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package atomic_test
     6  
     7  import (
     8  	"runtime/internal/atomic"
     9  	"testing"
    10  )
    11  
    12  var sink any
    13  
    14  func BenchmarkAtomicLoad64(b *testing.B) {
    15  	var x uint64
    16  	sink = &x
    17  	for i := 0; i < b.N; i++ {
    18  		_ = atomic.Load64(&x)
    19  	}
    20  }
    21  
    22  func BenchmarkAtomicStore64(b *testing.B) {
    23  	var x uint64
    24  	sink = &x
    25  	for i := 0; i < b.N; i++ {
    26  		atomic.Store64(&x, 0)
    27  	}
    28  }
    29  
    30  func BenchmarkAtomicLoad(b *testing.B) {
    31  	var x uint32
    32  	sink = &x
    33  	for i := 0; i < b.N; i++ {
    34  		_ = atomic.Load(&x)
    35  	}
    36  }
    37  
    38  func BenchmarkAtomicStore(b *testing.B) {
    39  	var x uint32
    40  	sink = &x
    41  	for i := 0; i < b.N; i++ {
    42  		atomic.Store(&x, 0)
    43  	}
    44  }
    45  
    46  func BenchmarkAnd8(b *testing.B) {
    47  	var x [512]uint8 // give byte its own cache line
    48  	sink = &x
    49  	for i := 0; i < b.N; i++ {
    50  		atomic.And8(&x[255], uint8(i))
    51  	}
    52  }
    53  
    54  func BenchmarkAnd(b *testing.B) {
    55  	var x [128]uint32 // give x its own cache line
    56  	sink = &x
    57  	for i := 0; i < b.N; i++ {
    58  		atomic.And(&x[63], uint32(i))
    59  	}
    60  }
    61  
    62  func BenchmarkAnd8Parallel(b *testing.B) {
    63  	var x [512]uint8 // give byte its own cache line
    64  	sink = &x
    65  	b.RunParallel(func(pb *testing.PB) {
    66  		i := uint8(0)
    67  		for pb.Next() {
    68  			atomic.And8(&x[255], i)
    69  			i++
    70  		}
    71  	})
    72  }
    73  
    74  func BenchmarkAndParallel(b *testing.B) {
    75  	var x [128]uint32 // give x its own cache line
    76  	sink = &x
    77  	b.RunParallel(func(pb *testing.PB) {
    78  		i := uint32(0)
    79  		for pb.Next() {
    80  			atomic.And(&x[63], i)
    81  			i++
    82  		}
    83  	})
    84  }
    85  
    86  func BenchmarkOr8(b *testing.B) {
    87  	var x [512]uint8 // give byte its own cache line
    88  	sink = &x
    89  	for i := 0; i < b.N; i++ {
    90  		atomic.Or8(&x[255], uint8(i))
    91  	}
    92  }
    93  
    94  func BenchmarkOr(b *testing.B) {
    95  	var x [128]uint32 // give x its own cache line
    96  	sink = &x
    97  	for i := 0; i < b.N; i++ {
    98  		atomic.Or(&x[63], uint32(i))
    99  	}
   100  }
   101  
   102  func BenchmarkOr8Parallel(b *testing.B) {
   103  	var x [512]uint8 // give byte its own cache line
   104  	sink = &x
   105  	b.RunParallel(func(pb *testing.PB) {
   106  		i := uint8(0)
   107  		for pb.Next() {
   108  			atomic.Or8(&x[255], i)
   109  			i++
   110  		}
   111  	})
   112  }
   113  
   114  func BenchmarkOrParallel(b *testing.B) {
   115  	var x [128]uint32 // give x its own cache line
   116  	sink = &x
   117  	b.RunParallel(func(pb *testing.PB) {
   118  		i := uint32(0)
   119  		for pb.Next() {
   120  			atomic.Or(&x[63], i)
   121  			i++
   122  		}
   123  	})
   124  }
   125  
   126  func BenchmarkXadd(b *testing.B) {
   127  	var x uint32
   128  	ptr := &x
   129  	b.RunParallel(func(pb *testing.PB) {
   130  		for pb.Next() {
   131  			atomic.Xadd(ptr, 1)
   132  		}
   133  	})
   134  }
   135  
   136  func BenchmarkXadd64(b *testing.B) {
   137  	var x uint64
   138  	ptr := &x
   139  	b.RunParallel(func(pb *testing.PB) {
   140  		for pb.Next() {
   141  			atomic.Xadd64(ptr, 1)
   142  		}
   143  	})
   144  }
   145  
   146  func BenchmarkCas(b *testing.B) {
   147  	var x uint32
   148  	x = 1
   149  	ptr := &x
   150  	b.RunParallel(func(pb *testing.PB) {
   151  		for pb.Next() {
   152  			atomic.Cas(ptr, 1, 0)
   153  			atomic.Cas(ptr, 0, 1)
   154  		}
   155  	})
   156  }
   157  
   158  func BenchmarkCas64(b *testing.B) {
   159  	var x uint64
   160  	x = 1
   161  	ptr := &x
   162  	b.RunParallel(func(pb *testing.PB) {
   163  		for pb.Next() {
   164  			atomic.Cas64(ptr, 1, 0)
   165  			atomic.Cas64(ptr, 0, 1)
   166  		}
   167  	})
   168  }
   169  func BenchmarkXchg(b *testing.B) {
   170  	var x uint32
   171  	x = 1
   172  	ptr := &x
   173  	b.RunParallel(func(pb *testing.PB) {
   174  		var y uint32
   175  		y = 1
   176  		for pb.Next() {
   177  			y = atomic.Xchg(ptr, y)
   178  			y += 1
   179  		}
   180  	})
   181  }
   182  
   183  func BenchmarkXchg64(b *testing.B) {
   184  	var x uint64
   185  	x = 1
   186  	ptr := &x
   187  	b.RunParallel(func(pb *testing.PB) {
   188  		var y uint64
   189  		y = 1
   190  		for pb.Next() {
   191  			y = atomic.Xchg64(ptr, y)
   192  			y += 1
   193  		}
   194  	})
   195  }
   196
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