Defrag Tools: #44 - WPT - DiskIO Analysis

27 minutes, 37 seconds


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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.

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

[00:30] - xperf -on PROC_THREAD+LOADER+DISK_IO+DISK_IO_INIT -stackwalk DiskReadInit+DiskWriteInit+DiskFlushInit
[02:00] - WPA
[03:22] - System Configuration
[04:30] - Disk Queue Length - need to use xPerfView
[06:32] - Disk Controllers, Disk Drives and RAID
[11:08] - * The 2nd thing is AHCI which does I/O reordering (forgot to mention it)
[15:45] - xPerfView - Disk I/O "Detail Graph"
[18:30] - WPA - IO Time & Disk Service Time
[22:45] - xPerfView - Disk Queue Length
[25:00] - Summary

Example: "xperf - Collect DiskIO.cmd"

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

echo .
echo ...Capturing...
echo .

xperf -on PROC_THREAD+LOADER+DISK_IO+DISK_IO_INIT -stackwalk DiskReadInit+DiskWriteInit+DiskFlushInit -BufferSize 1024 -MinBuffers 256 -MaxBuffers 256 -MaxFile 256 -FileMode Circular

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

xperf -stop -d diskio.etl


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