private static void _FastForEach(int threadIndex, IGetOrCreateValueSample sample)
{
for (int i = 0; i < _COUNT_ITERATIONS_FASTCREATOR; i++)
{
if (sample.GetOrCreate(i * 7) != -i * 7)
{
throw new Exception("An invalid result was got.");
}
}
}
private static void _SlowSomeCollisionsForEach(int threadIndex, IGetOrCreateValueSample sample)
{
int multiplier = _COUNT_MANY_THREADS;
for (long i = 0; i < _iterationsFor3Milliseconds; i++)
{
int value = (int)i * threadIndex;
if (sample.GetOrCreate(value) != -value)
{
throw new Exception("An invalid result was got.");
}
}
}
private static void _FastNonCollidingForEach(int threadIndex, IGetOrCreateValueSample sample)
{
int min = threadIndex * _COUNT_ITERATIONS_FASTCREATOR;
int max = min + _COUNT_ITERATIONS_FASTCREATOR;
for (int i = min; i < max; i++)
{
if (sample.GetOrCreate(i) != -i)
{
throw new Exception("An invalid result was got.");
}
}
}
private static void _SlowSomeCollisionsForEach(int threadIndex, IGetOrCreateValueSample sample)
{
int multiplier = _COUNT_MANY_THREADS;
for(long i=0; i<_iterationsFor3Milliseconds; i++)
{
int value = (int)i*threadIndex;
if (sample.GetOrCreate(value) != -value)
throw new Exception("An invalid result was got.");
}
}
private static void _FastNonCollidingForEach(int threadIndex, IGetOrCreateValueSample sample)
{
int min = threadIndex * _COUNT_ITERATIONS_FASTCREATOR;
int max = min + _COUNT_ITERATIONS_FASTCREATOR;
for(int i=min; i<max; i++)
{
if (sample.GetOrCreate(i) != -i)
throw new Exception("An invalid result was got.");
}
}
private static void _FastForEach(int threadIndex, IGetOrCreateValueSample sample)
{
for(int i=0; i<_COUNT_ITERATIONS_FASTCREATOR; i++)
if (sample.GetOrCreate(i*7) != -i*7)
throw new Exception("An invalid result was got.");
}
internal static void _Measure(int threadCount, ForEachDelegate forEachDelegate, IGetOrCreateValueSample sample)
{
Console.Write(sample.Message);
using(var startCountdown = new CountdownEvent(threadCount))
{
using(var canStartProcessingEvent = new ManualResetEvent(false))
{
using(var finishCountdown = new CountdownEvent(threadCount))
{
for(int threadIndex=0; threadIndex<threadCount; threadIndex++)
{
var thread =
new Thread
(
(p) =>
{
int i = (int)p;
startCountdown.Signal();
canStartProcessingEvent.WaitOne();
// tell that the thread is ready and wait for all threads to be ready
// before starting. We should not start before all threads are created
// and we should not consider the time to create the thread on our results.
forEachDelegate(i, sample);
finishCountdown.Signal();
}
);
thread.Start(threadIndex);
}
// wait until all threads are created to start the stopwatch.
startCountdown.Wait();
var stopwatch = new Stopwatch();
stopwatch.Start();
canStartProcessingEvent.Set();
// now we let all threads run. We should wait until all of them
// finish to know the real result.
finishCountdown.Wait();
stopwatch.Stop();
Console.WriteLine(stopwatch.Elapsed);
}
}
}
}
internal static void _Measure(int threadCount, ForEachDelegate forEachDelegate, IGetOrCreateValueSample sample)
{
Console.Write(sample.Message);
using (var startCountdown = new CountdownEvent(threadCount))
{
using (var canStartProcessingEvent = new ManualResetEvent(false))
{
using (var finishCountdown = new CountdownEvent(threadCount))
{
for (int threadIndex = 0; threadIndex < threadCount; threadIndex++)
{
var thread =
new Thread
(
(p) =>
{
int i = (int)p;
startCountdown.Signal();
canStartProcessingEvent.WaitOne();
// tell that the thread is ready and wait for all threads to be ready
// before starting. We should not start before all threads are created
// and we should not consider the time to create the thread on our results.
forEachDelegate(i, sample);
finishCountdown.Signal();
}
);
thread.Start(threadIndex);
}
// wait until all threads are created to start the stopwatch.
startCountdown.Wait();
var stopwatch = new Stopwatch();
stopwatch.Start();
canStartProcessingEvent.Set();
// now we let all threads run. We should wait until all of them
// finish to know the real result.
finishCountdown.Wait();
stopwatch.Stop();
Console.WriteLine(stopwatch.Elapsed);
}
}
}
}
