| // Copyright (c) 2016 Uber Technologies, Inc. |
| // |
| // Permission is hereby granted, free of charge, to any person obtaining a copy |
| // of this software and associated documentation files (the "Software"), to deal |
| // in the Software without restriction, including without limitation the rights |
| // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| // copies of the Software, and to permit persons to whom the Software is |
| // furnished to do so, subject to the following conditions: |
| // |
| // The above copyright notice and this permission notice shall be included in |
| // all copies or substantial portions of the Software. |
| // |
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| // THE SOFTWARE. |
| |
| package atomic |
| |
| import ( |
| "errors" |
| "math" |
| "runtime" |
| "sync" |
| "sync/atomic" |
| "testing" |
| ) |
| |
| const ( |
| _parallelism = 4 |
| _iterations = 1000 |
| ) |
| |
| var _stressTests = map[string]func() func(){ |
| "i32/std": stressStdInt32, |
| "i32": stressInt32, |
| "i64/std": stressStdInt32, |
| "i64": stressInt64, |
| "u32/std": stressStdUint32, |
| "u32": stressUint32, |
| "u64/std": stressStdUint64, |
| "u64": stressUint64, |
| "f64": stressFloat64, |
| "bool": stressBool, |
| "string": stressString, |
| "duration": stressDuration, |
| "error": stressError, |
| } |
| |
| func TestStress(t *testing.T) { |
| for name, ff := range _stressTests { |
| t.Run(name, func(t *testing.T) { |
| defer runtime.GOMAXPROCS(runtime.GOMAXPROCS(_parallelism)) |
| |
| start := make(chan struct{}) |
| var wg sync.WaitGroup |
| wg.Add(_parallelism) |
| f := ff() |
| for i := 0; i < _parallelism; i++ { |
| go func() { |
| defer wg.Done() |
| <-start |
| for j := 0; j < _iterations; j++ { |
| f() |
| } |
| }() |
| } |
| close(start) |
| wg.Wait() |
| }) |
| } |
| } |
| |
| func BenchmarkStress(b *testing.B) { |
| for name, ff := range _stressTests { |
| b.Run(name, func(b *testing.B) { |
| f := ff() |
| |
| b.Run("serial", func(b *testing.B) { |
| for i := 0; i < b.N; i++ { |
| f() |
| } |
| }) |
| |
| b.Run("parallel", func(b *testing.B) { |
| b.RunParallel(func(pb *testing.PB) { |
| for pb.Next() { |
| f() |
| } |
| }) |
| }) |
| }) |
| } |
| } |
| |
| func stressStdInt32() func() { |
| var atom int32 |
| return func() { |
| atomic.LoadInt32(&atom) |
| atomic.AddInt32(&atom, 1) |
| atomic.AddInt32(&atom, -2) |
| atomic.AddInt32(&atom, 1) |
| atomic.AddInt32(&atom, -1) |
| atomic.CompareAndSwapInt32(&atom, 1, 0) |
| atomic.SwapInt32(&atom, 5) |
| atomic.StoreInt32(&atom, 1) |
| } |
| } |
| |
| func stressInt32() func() { |
| var atom Int32 |
| return func() { |
| atom.Load() |
| atom.Add(1) |
| atom.Sub(2) |
| atom.Inc() |
| atom.Dec() |
| atom.CAS(1, 0) |
| atom.Swap(5) |
| atom.Store(1) |
| } |
| } |
| |
| func stressStdInt64() func() { |
| var atom int64 |
| return func() { |
| atomic.LoadInt64(&atom) |
| atomic.AddInt64(&atom, 1) |
| atomic.AddInt64(&atom, -2) |
| atomic.AddInt64(&atom, 1) |
| atomic.AddInt64(&atom, -1) |
| atomic.CompareAndSwapInt64(&atom, 1, 0) |
| atomic.SwapInt64(&atom, 5) |
| atomic.StoreInt64(&atom, 1) |
| } |
| } |
| |
| func stressInt64() func() { |
| var atom Int64 |
| return func() { |
| atom.Load() |
| atom.Add(1) |
| atom.Sub(2) |
| atom.Inc() |
| atom.Dec() |
| atom.CAS(1, 0) |
| atom.Swap(5) |
| atom.Store(1) |
| } |
| } |
| |
| func stressStdUint32() func() { |
| var atom uint32 |
| return func() { |
| atomic.LoadUint32(&atom) |
| atomic.AddUint32(&atom, 1) |
| // Adding `MaxUint32` is the same as subtracting 1 |
| atomic.AddUint32(&atom, math.MaxUint32-1) |
| atomic.AddUint32(&atom, 1) |
| atomic.AddUint32(&atom, math.MaxUint32) |
| atomic.CompareAndSwapUint32(&atom, 1, 0) |
| atomic.SwapUint32(&atom, 5) |
| atomic.StoreUint32(&atom, 1) |
| } |
| } |
| |
| func stressUint32() func() { |
| var atom Uint32 |
| return func() { |
| atom.Load() |
| atom.Add(1) |
| atom.Sub(2) |
| atom.Inc() |
| atom.Dec() |
| atom.CAS(1, 0) |
| atom.Swap(5) |
| atom.Store(1) |
| } |
| } |
| |
| func stressStdUint64() func() { |
| var atom uint64 |
| return func() { |
| atomic.LoadUint64(&atom) |
| atomic.AddUint64(&atom, 1) |
| // Adding `MaxUint64` is the same as subtracting 1 |
| atomic.AddUint64(&atom, math.MaxUint64-1) |
| atomic.AddUint64(&atom, 1) |
| atomic.AddUint64(&atom, math.MaxUint64) |
| atomic.CompareAndSwapUint64(&atom, 1, 0) |
| atomic.SwapUint64(&atom, 5) |
| atomic.StoreUint64(&atom, 1) |
| } |
| } |
| |
| func stressUint64() func() { |
| var atom Uint64 |
| return func() { |
| atom.Load() |
| atom.Add(1) |
| atom.Sub(2) |
| atom.Inc() |
| atom.Dec() |
| atom.CAS(1, 0) |
| atom.Swap(5) |
| atom.Store(1) |
| } |
| } |
| |
| func stressFloat64() func() { |
| var atom Float64 |
| return func() { |
| atom.Load() |
| atom.CAS(1.0, 0.1) |
| atom.Add(1.1) |
| atom.Sub(0.2) |
| atom.Store(1.0) |
| } |
| } |
| |
| func stressBool() func() { |
| var atom Bool |
| return func() { |
| atom.Load() |
| atom.Store(false) |
| atom.Swap(true) |
| atom.CAS(true, false) |
| atom.CAS(true, false) |
| atom.Load() |
| atom.Toggle() |
| atom.Toggle() |
| } |
| } |
| |
| func stressString() func() { |
| var atom String |
| return func() { |
| atom.Load() |
| atom.Store("abc") |
| atom.Load() |
| atom.Store("def") |
| atom.Load() |
| atom.Store("") |
| } |
| } |
| |
| func stressDuration() func() { |
| var atom = NewDuration(0) |
| return func() { |
| atom.Load() |
| atom.Add(1) |
| atom.Sub(2) |
| atom.CAS(1, 0) |
| atom.Swap(5) |
| atom.Store(1) |
| } |
| } |
| |
| func stressError() func() { |
| var atom = NewError(nil) |
| var err1 = errors.New("err1") |
| var err2 = errors.New("err2") |
| return func() { |
| atom.Load() |
| atom.Store(err1) |
| atom.Load() |
| atom.Store(err2) |
| atom.Load() |
| atom.Store(nil) |
| } |
| } |