public ThreadSamplingHistogramForm()
{
InitializeComponent();
ChartSize = 250;
m_sampleHistogrammDataFactory = new SampleHistogrammDataFactory(ChartSize);
}
protected void ThreadFunc()
{
m_stopped = false;
State = ThreadState.Started;
SetAfinnityMask();
Thread.BeginCriticalRegion();
int lastError;
do
{
NativeMethods.SetThreadPriority(m_threadHandle, m_priority);
lastError = Marshal.GetLastWin32Error();
if (lastError != 0)
{
LastErrorMessage = new Win32Exception(lastError).Message;
}
else
{
LastErrorMessage = string.Empty;
}
m_looper = true;
Thread.MemoryBarrier();
m_restartLoop = false;
switch (m_loadType)
{
case LoadType.YieldExecution:
while (m_looper)
{
NativeMethods.SwitchToThread();
++m_looped;
Thread.MemoryBarrier();
}
break;
case LoadType.Sleep:
while (m_looper)
{
Thread.Sleep(0);
++m_looped;
Thread.MemoryBarrier();
}
break;
case LoadType.EmptyLoop:
while (m_looper)
{
++m_looped;
Thread.MemoryBarrier();
}
break;
case LoadType.PrepareSampleHistogramm50k:
{
SampleHistogrammDataFactory dataFactory = new SampleHistogrammDataFactory(500);
while (m_looper)
{
++m_looped;
Thread.MemoryBarrier();
var sortedUniques = dataFactory.GetSortedUniques(TestData.TestDoubles50k);
var histagrammValues = dataFactory.GetHistagrammValues(sortedUniques);
GC.KeepAlive(histagrammValues);
}
}
break;
case LoadType.SpinWait:
// while (m_looper.Value) PAUSE
//not implemented Interlocked.Increment(ref m_looped);
unsafe
{
fixed(void *v = &m_looper)
{
s_pause(0, (byte *)v);
}
}
break;
case LoadType.MemoryPressure:
while (m_looper)
{
MemoryPressureFunction();
{
++m_looped;
Thread.MemoryBarrier();
}
}
break;
default:
throw new ArgumentOutOfRangeException();
}
} while (m_restartLoop);
State = ThreadState.Stopped;
Thread.EndCriticalRegion();
NativeMethods.CloseHandle(m_threadHandle);
lastError = Marshal.GetLastWin32Error();
if (lastError != 0)
{
LastErrorMessage = new Win32Exception(lastError).Message;
}
else
{
LastErrorMessage = string.Empty;
}
Reinit();
}
