1. Improving performance with the Windows Performance Toolkit
12/7/2018 5:41 PM
HW-59T
Improving performance with the Windows Performance Toolkit
Michael Milirud
Program Manager
Microsoft Corporation
© 2010 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

2. Agenda Motivations for performance analysis Key Concepts
Windows Performance Recorder
Windows Performance Analyzer
WPA integration with the ADK
You’ll leave knowing how to:
Approach performance
Collect and analyze traces
Perform basic live system analysis

3. Motivations for Performance Analysis

4. Performance is a Layered Challenge
Extensions, Driver, Services, Applications
Efficient platforms require efficient and reliable extensions
Windows engineering processes focus on performance throughout the development cycle
Operating System
Core Hardware, Processor, Chipset, and Devices
Fundamental quality starts
with a great hardware platform

5. Performance Improvement is a Cycle
Customer and Partner Connections
Design and Develop
Assess and Certify
Performance analysis is an iterative process
The people fixing an issue probably aren’t the people experiencing an issue
The ability to easily work together is key

6. Key Concepts

7. Elements of Performance
Responsiveness
Unresponsive systems quickly generate customer dissatisfaction
Machine constraints = reality
Resource utilization
Physical: CPU, GPU, disk, memory, network, battery
Logical: critical sections, critical resources
Resources can be critical if they are scarce, shared, and/or have queuing semantics

8. Origins of Windows Performance Toolkit
The Windows Performance Toolkit was introduced at PDC 2009
The tools have proven to be very valuable
The design focus to-date has been on power users

9. Benefits of WPT
Enables follow up on issues raised via ADK performance assessments
Enables holistic performance analysis
All processes/threads
All key system resources
User + kernel mode
Provides a way to analyze what customer actually experiences
Catch the problem as it happens
Capture-Anywhere-Decode-Anywhere
Very low overhead versus alternatives
Region of interest profiling
You get both what and when

10. Windows Performance Recorder and Analyzer
Tools for:
Trace Capture (WPR)
Trace Analysis (WPA)
Based on ETW (Event Tracing for Windows)
Used within Microsoft to build Windows
Core code reused in-box
Documentation on MSDN
Part of ADK and SDK in Windows 8

11. Stages of Performance Analysis
Perception
Measurement
Analysis
System slows down
App launch takes longer
Browser refresh is slower
Disk light is always on
Poor battery life
CPU profiling
Context switches
Changes in priority
Disk I/Os
Memory allocations
Lock acquisition
C and P state lifetimes
CPU utilization
CPU starvation
Priority inversions
Ineffective access patterns
Disk saturation
Memory leaks
Redundant memory
Lock contention
Energy Efficiency
Iterate

12. Windows Performance Recorder

13. Windows Performance Recorder
12/7/2018 5:41 PM
demo
Windows Performance Recorder
© 2010 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

14. Demo Concept Review Starting recording Monitoring recording status
Saving recording
Including issue description

15. Windows Performance Analyzer (A.K.A. XPerf)

16. XPerf in Windows 7

17. Benefits of WPA in Windows 8
Broaden the target audience to mainstream developers
Leverage familiar UI experiences
Enable quick ramp up
Reduce ‘noise’ to focus on the ‘right’ issues

18. WPA in Windows 8 Legend Graph Table Detailed Graph Graph Explorer
Aggregating Columns
Legend
Graph
Grouping Columns
Graphing Columns
Table
Gold Bar
Blue Bar

19. demo Windows Performance Analyzer 12/7/2018 5:41 PM
© 2010 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

20. Demo Concept Review Single window lifetime management
Visual Studio view management
Graph Explorer
Analysis Views
Single shared timeline
Detailed graphs
Diagnostic View
Profiles/sessions
Presets
Layouts
Graph types
Gold/Blue bars
Synchronization of selection

21. WPA Integration with ADK

22. First Class Integration with the ADK
ADK = Assessment & Deployment Kit
Assessments produce traces
Productive experience of troubleshooting identified issues

23. WPA Integration with ADK
12/7/2018 5:41 PM
demo
WPA Integration with ADK
Following up on ADK assessment issues
Here’s where the issue is!
© 2010 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

24. Demo Concept Review ADK integration Issues View
Assessment Activity graph
Assisted Diagnostics
Details View

25. Things to look out for Don’t assume you know what’s wrong
Don’t enable too much instrumentation
Don’t trace for longer than you need
Remember to enable stack walking on x64

26. Summary Performance is critical for your customer You have to
Plan for it before you code/build
Measure it as you code/build
WPA is integrated with ADK
WPR is a new tool in Windows 8

27. Related sessions
HW-147T building high quality Windows PCs using the assessment and deployment kit
HW-915P Introduction to assessments
HW-141T Reducing the memory footprint of drivers and apps
HW-922P Capturing and analyzing performance traces
HW-925P Customizing WPA trace views
HW-926P Introduction to the new WPA UI

28. Further reading and documentation
Dev Center:
Windows Performance Analysis
MSDN documentation:
WPA
WPR
Event Tracing for Windows
Books:
Windows Internals by Mark Russinovich, David Solomon, and Alex Ionescu
Contact info:
WPT Forum

29. thank you Feedback and questions http://forums.dev.windows.com
Session feedback

30. 12/7/2018 5:41 PM
© 2011 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.
© 2011 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.