Defrag Tools: #43 - WPT - Wait Analysis

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Description

In this episode of Defrag Tools, Andrew Richards, Chad Beeder and Larry Larsen continue walking you through the Windows Performance Toolkit (WPT). Example xPerf scripts.

Resources:
Defrag Tools: #23 - Windows 8 SDK
Defrag Tools: #29 - WinDbg - ETW Logging
Windows Performance Analysis Developer Center
Windows Performance Toolkit
Channel 9 Videos
NTDebugging Blog Article
PFE Blog Series

Timeline:
[01:05] - xperf -on PROC_THREAD+LOADER+PROFILE+INTERRUPT+DPC+DISPATCHER+CSWITCH -stackwalk Profile+CSwitch+ReadyThread
[01:50] - Synchronization Episodes: #24, #25 & #26
[02:10] - CSwitch (a.k.a. NewThread) and ReadyThread stacks
[03:36] - Aaron's Margosis' VirtMemTest "Hang the UI" example
[05:15] - CPU (Precise)
  NewProcess
  NewThreadId
  NewStack
  ReadyingProcess
  ReadyingThreadId
  ReadyingStack
  Waits(us)
[17:30] - Summary

Example: "xperf - Collect CPUWait.cmd"

@echo off
echo Press a key when ready to start...
pause
echo .
echo ...Capturing...
echo .

xperf -on PROC_THREAD+LOADER+PROFILE+INTERRUPT+DPC+DISPATCHER+CSWITCH -stackwalk Profile+CSwitch+ReadyThread -BufferSize 1024 -MinBuffers 256 -MaxBuffers 256 -MaxFile 256 -FileMode Circular

echo Press a key when you want to stop...
pause
echo .
echo ...Stopping...
echo .

xperf -stop -d cpuwait.etl

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