public async Task AwaitForEachTests(AsyncSchedulerCase testEnvironment)
{
// Pre JIT
await testEnvironment.Factory.StartNew(() => CpuLoader.Run(minDuration: 1, minCpuUsage: 1, needKernelLoad: true));
// Act (durations are for debugging)
CpuUsageAsyncWatcher watcher = new CpuUsageAsyncWatcher();
long expectedMicroseconds = 0;
await foreach (var milliseconds in GetLoadings())
{
await testEnvironment.Factory.StartNew(() => CpuLoader.Run(minDuration: milliseconds, minCpuUsage: milliseconds, needKernelLoad: true));
expectedMicroseconds += milliseconds * 1000L;
}
var totals = watcher.Totals;
long actualMicroseconds = totals.GetSummaryCpuUsage().TotalMicroSeconds;
Console.WriteLine($"Expected usage: {(expectedMicroseconds/1000d):n3}, Actual usage: {(actualMicroseconds/1000d):n3} milliseconds");
Console.WriteLine(totals.ToHumanString(taskDescription: "ParallelTests()"));
// Assert
Assert.GreaterOrEqual(totals.Count, 8, "Number of context switches should be 8 at least");
// 0.15 for qemu armhf, less for rest
Assert.AreEqual(expectedMicroseconds, actualMicroseconds, 0.15d * expectedMicroseconds, "Actual CPU Usage should be about as expected.");
}
public async Task CpuUsageAsyncMinimal()
{
CpuUsageAsyncWatcher watcher = new CpuUsageAsyncWatcher();
await Task.Run(() => "nothing to do");
var totals = watcher.Totals.GetSummaryCpuUsage();
}
public async Task ParallelTests(AsyncSchedulerCase testEnvironment)
{
if (!IsSupported())
{
return;
}
// Act (durations are for debugging)
CpuUsageAsyncWatcher watcher = new CpuUsageAsyncWatcher();
TaskFactory tf = new TaskFactory();
var task4 = testEnvironment.Factory.StartNew(() => LoadCpu(milliseconds: 2400));
var task3 = testEnvironment.Factory.StartNew(() => LoadCpu(milliseconds: 2100));
var task2 = testEnvironment.Factory.StartNew(() => LoadCpu(milliseconds: 1800));
var task1 = testEnvironment.Factory.StartNew(() => LoadCpu(milliseconds: 1500));
await Task.WhenAll(task1, task2, task3, task4);
await NotifyFinishedTasks();
watcher.Stop();
var totals = watcher.Totals;
// Assert
long actualMicroseconds = totals.GetSummaryCpuUsage().TotalMicroSeconds;
long expectedMicroseconds = 1000L * (2400 + 2100 + 1800 + 1500);
Console.WriteLine($"Expected usage: {(expectedMicroseconds/1000d):n3}, Actual usage: {(actualMicroseconds/1000d):n3} milliseconds");
Console.WriteLine(totals.ToHumanString(taskDescription: "ParallelTests()"));
// 7 for windows 8 cores, rarely 6 for slow 2 core machine, but 7 for single core armv5
Assert.GreaterOrEqual(totals.Count, 6, "Number of context switches should be 6 at least");
Assert.AreEqual(expectedMicroseconds, actualMicroseconds, 0.1d * expectedMicroseconds, "Actual CPU Usage should be about as expected.");
}
public async Task SimpleTests(AsyncSchedulerCase testEnvironment)
{
if (!IsSupported())
{
return;
}
// Act (durations are for debugging)
CpuUsageAsyncWatcher watch = new CpuUsageAsyncWatcher();
await testEnvironment.Factory.StartNew(() => LoadCpu(milliseconds : 200));
await testEnvironment.Factory.StartNew(() => LoadCpu(milliseconds : 500));
await testEnvironment.Factory.StartNew(() => LoadCpu(milliseconds : 800));
await NotifyFinishedTasks();
watch.Stop();
var totals = watch.Totals;
// Assert
long actualMicroseconds = totals.GetSummaryCpuUsage().TotalMicroSeconds;
long expectedMicroseconds = 1000L * (200 + 500 + 800);
Console.WriteLine($"Expected usage: {(expectedMicroseconds/1000d):n3}, Actual usage: {(actualMicroseconds/1000d):n3} milliseconds");
Console.WriteLine(watch.ToHumanString(taskDescription: "SimpleTests()"));
Assert.GreaterOrEqual(totals.Count, 6, "Number of context switches should be 6 at least");
Assert.AreEqual(expectedMicroseconds, actualMicroseconds, 0.1d * expectedMicroseconds, "Actual CPU Usage should be about as expected.");
}
private async Task PreJit()
{
Console.WriteLine("Pre-Jitting CpuUsageAsyncWatcher class");
CpuUsageAsyncWatcher watch = new CpuUsageAsyncWatcher();
await Task.Run(() => LoadCpu(1));
await NotifyFinishedTasks();
watch.Stop();
watch.ToHumanString();
Console.WriteLine("Pre-Jitted CpuUsageAsyncWatcher class");
}
async Task <bool> CheckExpectedCpuUsage(int expectedMilliseconds, TaskFactory factory)
{
// Act
CpuUsageAsyncWatcher watcher = new CpuUsageAsyncWatcher();
await factory.StartNew(() => LoadCpu(expectedMilliseconds));
watcher.Stop();
Console.WriteLine(watcher.ToHumanString(taskDescription: $"'Expected CPU Load is {expectedMilliseconds} milli-seconds'"));
Assert.AreEqual(2, watcher.Totals.Count, "The CheckExpectedCpuUsage should produce exact 2 context switches");
// Assert: CpuUsage should be expectedMilliseconds
var actualSeconds = watcher.GetSummaryCpuUsage().TotalMicroSeconds / 1000000d;
bool isOk = actualSeconds >= expectedMilliseconds / 1000d;
return(isOk);
}
