public void IO_Write_Test(CpuUsageScope scope)
{
if (!PosixResourceUsage.IsSupported)
{
return;
}
if (scope == CpuUsageScope.Thread && CrossInfo.ThePlatform != CrossInfo.Platform.Linux)
{
return;
}
// Arrange: nothing to do
// Act
PosixResourceUsage before = PosixResourceUsage.GetByScope(scope).Value;
var numBytes = 10 * 512 * 1024;
WriteFile(numBytes);
PosixResourceUsage after = PosixResourceUsage.GetByScope(scope).Value;
var delta = PosixResourceUsage.Substruct(after, before);
Console.WriteLine($"Operation: write {numBytes:n0} bytes. ReadOps = {delta.ReadOps}. WriteOps = {delta.WriteOps}");
// Assert
if (CrossInfo.ThePlatform != CrossInfo.Platform.Linux)
{
return;
}
if (SkipPosixResourcesUsageAsserts || !IsIoReadsWritesSupported())
{
return;
}
Assert.Greater(delta.WriteOps, 0);
}
public void Smoke_Test(CpuUsageScope scope)
{
if (!PosixResourceUsage.IsSupported)
{
return;
}
Console.WriteLine($"PosixResourceUsage.GetByScope({scope}): {PosixResourceUsage.GetByScope(scope)}");
}
public void ContextSwitch_Test(CpuUsageScope scope, int expectedSwitchCount)
{
if (!PosixResourceUsage.IsSupported)
{
return;
}
if (scope == CpuUsageScope.Thread && CrossInfo.ThePlatform != CrossInfo.Platform.Linux)
{
return;
}
// Act
PosixResourceUsage before = PosixResourceUsage.GetByScope(scope).Value;
for (int i = 0; i < expectedSwitchCount; i++)
{
// CpuLoader.Run(1, 0, true);
Stopwatch sw = Stopwatch.StartNew();
while (sw.ElapsedMilliseconds < 1)
{
;
}
// on some build server sometimes fails (Azure - sometimes fail, AppVeyor - OK)
Thread.Sleep(3);
}
PosixResourceUsage after = PosixResourceUsage.GetByScope(scope).Value;
// var delta = PosixResourceUsage.Substruct(after, before);
var delta = after - before;
Console.WriteLine($"delta.InvoluntaryContextSwitches = {delta.InvoluntaryContextSwitches}");
Console.WriteLine($"delta.VoluntaryContextSwitches = {delta.VoluntaryContextSwitches}");
// Assert
if (CrossInfo.ThePlatform != CrossInfo.Platform.Linux)
{
return;
}
if (SkipPosixResourcesUsageAsserts)
{
return;
}
Assert.IsTrue(expectedSwitchCount <= delta.VoluntaryContextSwitches && expectedSwitchCount <= delta.VoluntaryContextSwitches + 7);
// if (scope == CpuUsageScope.Thread)
// Assert.IsTrue(expectedSwitchCount == delta.VoluntaryContextSwitches || expectedSwitchCount == delta.VoluntaryContextSwitches - 1);
// else
// Assert.GreaterOrEqual(delta.VoluntaryContextSwitches, expectedSwitchCount);
}