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// Copyright (c) Microsoft. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for full license information.
using Microsoft.Xunit.Performance;
using System;
using System.Threading;
namespace PerfLabTests
{
public class JITIntrinsics
{
private static int s_i;
private static string s_s;
[Benchmark(InnerIterationCount = 100000)]
public static void CompareExchangeIntNoMatch()
{
s_i = 0;
foreach (var iteration in Benchmark.Iterations)
using (iteration.StartMeasurement())
for (int i = 0; i < Benchmark.InnerIterationCount; i++)
Interlocked.CompareExchange(ref s_i, 5, -1);
}
[Benchmark(InnerIterationCount = 100000)]
public static void CompareExchangeIntMatch()
{
foreach (var iteration in Benchmark.Iterations)
{
s_i = 1;
using (iteration.StartMeasurement())
for (int i = 0; i < Benchmark.InnerIterationCount; i++)
Interlocked.CompareExchange(ref s_i, 5, 1);
}
}
[Benchmark(InnerIterationCount = 100000)]
public static void CompareExchangeObjNoMatch()
{
s_s = "Hello";
foreach (var iteration in Benchmark.Iterations)
using (iteration.StartMeasurement())
for (int i = 0; i < Benchmark.InnerIterationCount; i++)
Interlocked.CompareExchange(ref s_s, "World", "What?");
}
[Benchmark(InnerIterationCount = 100000)]
public static void CompareExchangeObjMatch()
{
foreach (var iteration in Benchmark.Iterations)
{
s_s = "What?";
using (iteration.StartMeasurement())
for (int i = 0; i < Benchmark.InnerIterationCount; i++)
Interlocked.CompareExchange(ref s_s, "World", "What?");
}
}
[Benchmark(InnerIterationCount = 100000)]
public static void InterlockedIncrement()
{
foreach (var iteration in Benchmark.Iterations)
using (iteration.StartMeasurement())
for (int i = 0; i < Benchmark.InnerIterationCount; i++)
Interlocked.Increment(ref s_i);
}
[Benchmark(InnerIterationCount = 100000)]
public static void InterlockedDecrement()
{
foreach (var iteration in Benchmark.Iterations)
using (iteration.StartMeasurement())
for (int i = 0; i < Benchmark.InnerIterationCount; i++)
Interlocked.Decrement(ref s_i);
}
}
}
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