public static CpuUsage Substruct(CpuUsage onEnd, CpuUsage onStart)
{
var user = onEnd.UserUsage.TotalMicroSeconds - onStart.UserUsage.TotalMicroSeconds;
var system = onEnd.KernelUsage.TotalMicroSeconds - onStart.KernelUsage.TotalMicroSeconds;
return(new CpuUsage(user, system));
}
public static CpuUsage Add(CpuUsage one, CpuUsage two)
{
long user = one.UserUsage.TotalMicroSeconds + two.UserUsage.TotalMicroSeconds;
long system = one.KernelUsage.TotalMicroSeconds + two.KernelUsage.TotalMicroSeconds;
return(new CpuUsage(user, system));
}
private void ContextChangedHandler(AsyncLocalValueChangedArgs <object> args)
{
// if (!args.ThreadContextChanged) return;
if (!IsRunning)
{
return;
}
long tid = GetThreadId();
if (args.PreviousValue == null)
{
ContextItem.Value = new ContextSwitchInfo()
{
ThreadId = tid,
StartAt = Stopwatch.StartNew(),
UsageOnStart = CpuUsageReader.GetByThread().Value,
};
}
else if (args.CurrentValue == null)
{
var contextOnStart = ContextItem.Value;
ContextItem.Value = null;
if (contextOnStart == null)
{
throw new InvalidOperationException(
"CpuUsageAsyncWatcher.OnEnd: Missing contextOnStart. Please report");
}
if (tid != contextOnStart.ThreadId)
{
throw new InvalidOperationException(
$"CpuUsageAsyncWatcher.OnEnd: ContextItem.Value.ThreadId is not as expected."
+ $"Thread.CurrentThread.ManagedThreadId is {tid}. "
+ $"contextOnStart.ThreadId is {contextOnStart.ThreadId}. Please report");
}
var ticks = contextOnStart.StartAt.ElapsedTicks;
var duration = ticks / (double)Stopwatch.Frequency;
var usageOnEnd = CpuUsageReader.GetByThread().Value;
var cpuUsage = CpuUsage.Substruct(usageOnEnd, contextOnStart.UsageOnStart);
ContextSwitchMetrics logRow = new ContextSwitchMetrics()
{
Duration = duration,
CpuUsage = cpuUsage
};
lock (_Log) _Log.Add(logRow);
}
#if DEBUG
Console.ForegroundColor = ConsoleColor.Cyan;
string AsString(object value) => value == null ? "off" : Convert.ToString(value);
Console.WriteLine($"Value Changed {(args.ThreadContextChanged ? $"WITH context #{tid}" : $"WITHOUT context #{tid}")}: {AsString(args.PreviousValue)} => {AsString(args.CurrentValue)}");
