1. Certifying graphics experiences on Windows 8
HW-215T
Certifying graphics experiences on Windows 8
Rudolph Balaz
Senior Program Manager Lead

2. Agenda Windows Hardware Certification Kit (HCK) for Graphics
Key to delivering a great experience
Scenario focused Testing
Targeting key experiences
User Experience
Reliability and Stability
Developer Experience
Partner Experience
Goals of this presentation
Understanding how the Windows Hardware Certificate program helps our partners design a Windows 8 system
Demonstrate how the requirements are easy to understand and provide direct value to the end user

3. Certified WDDM Graphics Drivers ensure devices are designed for a great Metro style user experience

4. Key to Delivering a great graphics experience
Windows 8 is delivering a Metro style user experience
Windows graphics driver model evolved and optimized for Metro style experiences on a variety of form factors
Certification enables you to design to meet these expectations
Experience / Metrics / Tools
Key Metro style expectations for graphics:
Graphics performance – End user experience
Graphics quality – End user experience
Graphics conformance – Developer confidence

5. Scenario focused testing
Windows 8 graphics stack enables improved experiences
System boot
Login
Usage scenarios such as - touch, animation, rotation and sleep
Certification for graphics expanded
End to end
Scenario focused
New tools and content – Performance test debut

6. Metro style experiences

7. Seamless boot experience
Factors affecting seamless boot
Firmware / BIOS
Boot Loader
Driver initialization
OS Startup

8. Seamless boot experience
WDDM 1.2
Firmware initiated native display mode
Firmware / driver / OS handoff
Fast sleep/ resume times
Hardware initialization
HCK provides
Boot validation / Driver – OS handoff testing
Action: Eliminate unnecessary delays and flashes

9. Metro style apps launch instantly
Factors affecting app launch
Graphics “device size”
Graphics device creation
Shader generation
Just in case “optimizations”

10. Metro style apps launch instantly
WDDM 1.2
UMD logging for debugging
HCK provides measurements for
Time to first frame
Time to paint contents of an app
Memory usage
Action: Optimize for Metro style apps

11. Metro style apps are fast and fluid
Factors affecting app performance
Efficient memory usage
Fast system memory to video memory transfers
Fast rendering
Efficient rasterization
Hardware advances

12. Metro style apps are fast and fluid
WDDM 1.2 features
Smooth rotation
Offer/Reclaim to reduce memory usage in drivers and apps
GPU pre-emption
Support for tile based rendering architectures
HCK provides measurements for
Total memory cost for graphics scenarios
# of frames missed and # of concurrent frames missed
Action: Release resources back to the system early

13. Stability and reliability

14. Stability and reliability
Metro style apps, Windows 8 shell, and IE are all using DirectX technologies (D3D11)
This means more demands on GPU
Longer time between reboots

15. Stability and reliability
WDDM 1.2 delivers better stability and reliability
Per engine TDR
Improvements to TDR handling
UMD logging for debugging
GPU pre-emption
HCK provides “crash” test suite
Action: thoroughly analyze failures and fix them

16. Developer experiences

17. Developer experiences
Metro style apps depend on DirectX technologies (D3D11)
Windows platform promises:
Consistency / predictability
Reliability
Hardware acceleration
Develop on app on one system but deploy on everywhere
Usage pattern differs for app categories

18. Developer experiences
WDDM is the only Windows 8 driver model
WDDM 1.2 delivers confidence
DirectX APIs always work
API level support for Stereo even on Mono systems
Consistent API platform
HCK provides extensive conformance suite
Action: run tests in all system configurations

19. Partner experiences

20. What do kit changes mean for graphics?
New UI
New “concepts” and “structure”
Product types / features / requirements
Introduction of “Feature Based Testing”
New Automation object model
[659] The Windows Hardware Certification Kit

21. Graphics requirements
Windows 8 requirements:
Better written, easier to read, more complete
Explicit focus on scenarios and justification
Missing / ambiguous requirements – clarified
Testing at the correct level
WDDM 1.2 uses new HCK concepts
“graphics products”
Full / Render / Display only / etc.
Feature based testing

22. Graphics testing Introduction of graphics performance tests
More system level testing
Advanced topics
Parallel execution of graphics tests
Automation APIs
Device Families

23. Graphics testing
Do:
Thoroughly analyze all failures and fix them
Run tests in all configurations
Leverage parallel execution
All Graphics devices / display adapters pass – repeatedly

24. Summary

25. Summary WDDM 1.2 is the Windows 8 driver model
HCK provides tools for you to design for Windows 8
Polish Windows 8 scenarios
Do more than what certification requires
Analyze all failures – analyze the results
Surpass performance metrics
Test more configurations
Invest in hardware features
Optimize for Metro style apps

26. Related sessions
[HW-260T] Windows Certification: improvements to the logo program
[HW-659T] Certifying hardware with the Windows Hardware Certification Kit
[HW-218T] Understanding the Windows 8 graphics driver model
[SAC-217T] Graphics on the server
[HW-220C] Chalk Talk: Transitioning from XDDM to WDDM
[PLAT-752T] Tuning GPU usage for any form factor
[PLAT-766T] Introduction to DirectX for Metro style apps
[PLAT-751T] 3D Graphics in Metro Style Apps and Games

27. Further reading and documentation
WDDM 1.2 Whitepaper
Direct3D 11.1 Features
DXGI 1.2 Improvements
Unlocking the GPU with Direct3D (PDC 2008)
Direct3D on Downlevel Hardware (MSDN)
Hardware Support for Direct3D 10Level9 Formats (MSDN)
Contact info –

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

29. 11/27/2018 2:35 AM
© 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.