private void DoMetrics(LinuxEvent linuxEvent)
{
KeyValuePair <LinuxThreadState, LinuxEvent> sampleInfo;
if (EndingStates.TryGetValue(linuxEvent.ThreadID, out sampleInfo))
{
linuxEvent.Period = linuxEvent.TimeMSec - sampleInfo.Value.TimeMSec;
}
// This is check for completed scheduler events, ones that start with prev_comm and have
// corresponding next_comm.
if (linuxEvent.Kind == EventKind.Scheduler)
{
SchedulerEvent schedEvent = (SchedulerEvent)linuxEvent;
if (EndingStates.ContainsKey(schedEvent.Switch.PreviousThreadID) &&
EndingStates[schedEvent.Switch.PreviousThreadID].Key == LinuxThreadState.CPU_TIME) // Blocking
{
sampleInfo = EndingStates[schedEvent.Switch.PreviousThreadID];
EndingStates[schedEvent.Switch.PreviousThreadID] =
new KeyValuePair <LinuxThreadState, LinuxEvent>(LinuxThreadState.BLOCKED_TIME, linuxEvent);
linuxEvent.Period = linuxEvent.TimeMSec - sampleInfo.Value.TimeMSec;
}
if (EndingStates.TryGetValue(schedEvent.Switch.NextThreadID, out sampleInfo) &&
sampleInfo.Key == LinuxThreadState.BLOCKED_TIME) // Unblocking
{
EndingStates[schedEvent.Switch.NextThreadID] =
new KeyValuePair <LinuxThreadState, LinuxEvent>(LinuxThreadState.CPU_TIME, linuxEvent);
// sampleInfo.Value.Period = linuxEvent.Time - sampleInfo.Value.Time;
AddThreadPeriod(linuxEvent.ThreadID, sampleInfo.Value.TimeMSec, linuxEvent.TimeMSec);
}
}
else if (linuxEvent.Kind == EventKind.Cpu)
{
int threadid;
if (EndingCpuUsage.TryGetValue(linuxEvent.CpuNumber, out threadid) && threadid != linuxEvent.ThreadID) // Unblocking
{
if (EndingStates.TryGetValue(threadid, out sampleInfo))
{
EndingStates[threadid] =
new KeyValuePair <LinuxThreadState, LinuxEvent>(LinuxThreadState.CPU_TIME, linuxEvent);
sampleInfo.Value.Period = linuxEvent.TimeMSec - sampleInfo.Value.TimeMSec;
AddThreadPeriod(linuxEvent.ThreadID, sampleInfo.Value.TimeMSec, linuxEvent.TimeMSec);
}
}
}
EndingCpuUsage[linuxEvent.CpuNumber] = linuxEvent.ThreadID;
}
/// <summary>
/// Given a Linux event gotten from the trace, make its corresponding sample for the stack source.
/// </summary>
public StackSourceSample CreateSampleFor(LinuxEvent linuxEvent, BlockedTimeAnalyzer blockedTimeAnalyzer)
{
IEnumerable <Frame> frames = linuxEvent.CallerStacks;
StackSourceCallStackIndex stackIndex = currentStackIndex;
var sample = new StackSourceSample(this);
sample.TimeRelativeMSec = linuxEvent.TimeMSec;
sample.Metric = 1;
stackIndex = InternFrames(frames.GetEnumerator(), stackIndex, linuxEvent.ProcessID, linuxEvent.ThreadID, blockedTimeAnalyzer);
sample.StackIndex = stackIndex;
return(sample);
}
/// <summary>
/// Given a Linux event gotten from the trace, make its corresponding sample for the stack source.
/// </summary>
public LinuxPerfScriptStackSourceSample CreateSampleFor(LinuxEvent linuxEvent, BlockedTimeAnalyzer blockedTimeAnalyzer)
{
IEnumerable <Frame> frames = linuxEvent.CallerStacks;
StackSourceCallStackIndex stackIndex = currentStackIndex;
var sample = new LinuxPerfScriptStackSourceSample(this);
sample.TimeRelativeMSec = linuxEvent.TimeMSec - StartTimeStampMSec;
sample.Metric = (float)linuxEvent.Period;
sample.CpuNumber = linuxEvent.CpuNumber;
stackIndex = InternFrames(frames.GetEnumerator(), stackIndex, linuxEvent.ProcessID, linuxEvent.ThreadID, doThreadTime ? blockedTimeAnalyzer : null);
sample.StackIndex = stackIndex;
return(sample);
}
public void UpdateThreadState(LinuxEvent linuxEvent)
{
if (TimeStamp < linuxEvent.TimeMSec)
{
TimeStamp = linuxEvent.TimeMSec;
}
if (!BeginningStates.ContainsKey(linuxEvent.ThreadID))
{
BeginningStates.Add(
linuxEvent.ThreadID,
new KeyValuePair <LinuxThreadState, LinuxEvent>(LinuxThreadState.CPU_TIME, linuxEvent));
EndingStates[linuxEvent.ThreadID] = BeginningStates[linuxEvent.ThreadID];
}
DoMetrics(linuxEvent);
}
public void LinuxEventSampleAssociation(LinuxEvent linuxEvent, StackSourceSample sample)
{
LinuxEventSamples[linuxEvent] = sample;
}
private void DoMetrics(LinuxEvent linuxEvent)
{
KeyValuePair <LinuxThreadState, LinuxEvent> sampleInfo;
// This is check for completed scheduler events, ones that start with prev_comm and have
// corresponding next_comm.
if (linuxEvent.Kind == EventKind.Scheduler)
{
SchedulerEvent schedEvent = (SchedulerEvent)linuxEvent;
if (EndingStates.ContainsKey(schedEvent.Switch.PreviousThreadID) &&
EndingStates[schedEvent.Switch.PreviousThreadID].Key == LinuxThreadState.CPU_TIME) // Blocking
{
// PreviousThreadID is now blocking. linuxEvent contains its blocking stack, so save it here.
// When it unblocks (becomes NextThreadID below, we'll log a sample for it.)
EndingStates[schedEvent.Switch.PreviousThreadID] =
new KeyValuePair <LinuxThreadState, LinuxEvent>(LinuxThreadState.BLOCKED_TIME, linuxEvent);
}
if (EndingStates.TryGetValue(schedEvent.Switch.NextThreadID, out sampleInfo) &&
sampleInfo.Key == LinuxThreadState.BLOCKED_TIME) // Unblocking
{
sampleInfo.Value.Period = linuxEvent.TimeMSec - sampleInfo.Value.TimeMSec;
AddThreadPeriod(sampleInfo.Value.ThreadID, sampleInfo.Value.TimeMSec, linuxEvent.TimeMSec);
StackSource.AddSample(StackSource.CreateSampleFor(sampleInfo.Value, this));
EndingStates[schedEvent.Switch.NextThreadID] =
new KeyValuePair <LinuxThreadState, LinuxEvent>(LinuxThreadState.CPU_TIME, linuxEvent);
}
}
else if (linuxEvent.Kind == EventKind.ThreadExit)
{
ThreadExitEvent exitEvent = (ThreadExitEvent)linuxEvent;
if (EndingStates.TryGetValue(exitEvent.Exit.ThreadID, out sampleInfo))
{
if (sampleInfo.Key == LinuxThreadState.BLOCKED_TIME) // Blocked on exit
{
sampleInfo.Value.Period = linuxEvent.TimeMSec - sampleInfo.Value.TimeMSec;
AddThreadPeriod(sampleInfo.Value.ThreadID, sampleInfo.Value.TimeMSec, linuxEvent.TimeMSec);
StackSource.AddSample(StackSource.CreateSampleFor(sampleInfo.Value, this));
}
else // Unblocked on exit
{
linuxEvent.Period = linuxEvent.TimeMSec - sampleInfo.Value.TimeMSec;
StackSource.AddSample(StackSource.CreateSampleFor(linuxEvent, this));
}
// Remove the thread so that any events that might come after the exit are ignored.
EndingStates.Remove(exitEvent.Exit.ThreadID);
}
}
else if (linuxEvent.Kind == EventKind.Cpu)
{
// Keep track of the last CPU sample for each CPU, and use its timestamp
// to determine how much weight to give the sample.
if (LastCpuUsage.TryGetValue(linuxEvent.CpuNumber, out LinuxEvent lastCpuEvent))
{
lastCpuEvent.Period = linuxEvent.TimeMSec - lastCpuEvent.TimeMSec;
StackSource.AddSample(StackSource.CreateSampleFor(lastCpuEvent, this));
}
LastCpuUsage[linuxEvent.CpuNumber] = linuxEvent;
}
}
