protected override TimeSpan DoBenchmarkAlgorithm(FileStream stream, Action<byte[], int, int> work, BenchmarkFlags flags, CancellationToken cancellationToken)
{
var sequenceReadTimeTotal = new TimeSpan(0);
byte[] buffer = AssemblyUtility.GetData(BlockSize, flags.HasFlag(BenchmarkFlags.Compressible));
for (int i = 0; i < BlockCount; i++)
{
cancellationToken.ThrowIfCancellationRequested(); //可以取消
sequenceReadTimeTotal += AssemblyUtility.GetTime(() => work(buffer, 0, buffer.Length));
}
return sequenceReadTimeTotal;
}
protected override TimeSpan DoBenchmarkAlgorithm(FileStream stream, Action<byte[], int, int> work, BenchmarkFlags flags, CancellationToken cancellationToken)
{
var random = new Random();
TimeSpan timeTotal = default(TimeSpan);
for (int j = 0; j < BlockCount / this.outstandingThreadsCount; j++)
{
cancellationToken.ThrowIfCancellationRequested(); //可以取消
var randomArray = AssemblyUtility.GetData(BlockSize, flags.HasFlag(BenchmarkFlags.Compressible));
long posision = BlockSize * random.Next(BlockCount);
timeTotal += AssemblyUtility.GetTime(() =>
{
stream.Seek(posision, SeekOrigin.Begin);
work(randomArray, 0, randomArray.Length);
});
}
return timeTotal;
}
public override IOSpeed GetTestResult(PartitionInfo partition, BenchmarkType type, BenchmarkFlags flags, CancellationToken cancellationToken)
{
var randomBenchmarkTimes = new TimeSpan[this.outstandingThreadsCount];
BenchmarkFile.OpenFileHandle(partition, type,
handle =>
{
Parallel.For(0, this.outstandingThreadsCount, i =>
{
using (FileStream stream = new FileStream(handle, FileAccess.Read, BlockSize))
{
Action<byte[], int, int> work = Utility.GetReadOrWriteAction(type, stream);
randomBenchmarkTimes[i] = DoBenchmarkAlgorithm(stream, work, flags, cancellationToken);
}
});
});
var totalTimes = randomBenchmarkTimes.Aggregate((a, b) => a + b);
return new IOSpeed(time: totalTimes, ioCount: BlockCount, bytes: BlockCount * BlockSize);
}
protected override TimeSpan DoBenchmarkAlgorithm(FileStream stream, Action<byte[], int, int> work, BenchmarkFlags flags, CancellationToken cancellationToken)
{
var randomBenchmarkTimeTotal = new TimeSpan(0);
for (int i = 0; i < BlockCount; i++)
{
cancellationToken.ThrowIfCancellationRequested(); //可以取消
var randomArray = AssemblyUtility.GetData(BlockSize, flags.HasFlag(BenchmarkFlags.Compressible));
long posision = BlockSize * this.RandomGen.Next(BlockCount);
randomBenchmarkTimeTotal += AssemblyUtility.GetTime(() =>
{
stream.Seek(posision, SeekOrigin.Begin);
work(randomArray, 0, randomArray.Length);
});
var blockCountIn60S = (double)i / randomBenchmarkTimeTotal.Ticks * 60;
this.BlockCountValue = (int)Min(this.BlockCountValue, Max(Max(i, EvalutionCount), blockCountIn60S));
}
return randomBenchmarkTimeTotal;
}
/// <summary>
/// 根据核心测试算法返回的时间计算结果。
/// </summary>
/// <param name="partition">测试分区</param>
/// <param name="arg">测试类型</param>
/// <param name="flags">测试所需参数</param>
/// <param name="cancellationToken">用以取消工作的取消标记</param>
/// <returns></returns>
public virtual IOSpeed GetTestResult(PartitionInfo partition, BenchmarkType type, BenchmarkFlags flags, CancellationToken cancellationToken)
{
TimeSpan result = new TimeSpan();
BenchmarkFile.OpenFileStream(partition, type, BlockSize,
stream =>
{
Action<byte[], int, int> work = GetReadOrWriteAction(type, stream);
result = DoBenchmarkAlgorithm(stream, work, flags, cancellationToken);
});
return new IOSpeed(time: result, ioCount: BlockCount, bytes: BlockCount * BlockSize);
}
/// <summary> /// 测试核心算法 /// </summary> /// <param name="stream"></param> /// <param name="work"></param> /// <param name="flags"></param> /// <param name="cancellationToken"></param> /// <returns></returns> protected abstract TimeSpan DoBenchmarkAlgorithm(FileStream stream, Action<byte[], int, int> work, BenchmarkFlags flags, CancellationToken cancellationToken);