Intel HD Graphics DirectX Developer's Guide (Sandy Bridge)

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3.10.6 Avoid writing to unlocked buffers ................................................ 34
3.10.7 Avoid tight polling on queries ..................................................... 34
4 Performance Analysis on Intel Processor graphics ................................................. 35
4.1 Diagnosing Performance Bottlenecks ........................................................ 35
4.2 Performance Analysis Methodology .......................................................... 35
4.2.1 Game Performance Analysis – “Playability” .................................. 36
1 Appendix: Introducing Intel® Graphics Performance Analyzers (Intel® GPA) ........... 38
1.1.1 Localizing Bottlenecks to a Graphics Stack Domain ....................... 41
2 Appendix: Enhancing Graphics Performance on Intel® Processor Graphics with Intel®
GPA ................................................................................................................ 45
2.1 Case Study: 777 Studio - Rise of Flight ..................................................... 45
2.1.1 Initial Analysis Using Intel® GPA System Analyzer ....................... 46
2.1.2 Using Intel® GPA Frame Analyzer .............................................. 50
2.1.3 Analyzing the terrain render frame ............................................. 52
2.1.4 Optimization Summary .............................................................. 54
2.1.5 Conclusion ............................................................................... 54
2.1.6 About the Author ...................................................................... 54
2.2 Case Study: Gas Powered Games – “Demigod”* ........................................ 55
2.2.1 Stage 1: Graphics Domain ......................................................... 55
2.2.2 Stage 2: Scene Selection ........................................................... 56
Figure 10 A typical Scene in Demigod: Graphics Detail is on the Lowest Game Setting .................. 57
2.2.3 Stage 3: Isolating the Cause ...................................................... 57
Figure 11 Intel® GPA Frame Analyzer Sampling Indicating a Hot Spot in the Clear Call ................. 58
Figure 12 After Disabling the Clear Call when Shadows are Disabled ........................................... 59
Figure 14 Same Scene with a High GPU Load Shader Outputting Yellow ....................................... 61
Figure 16 Intel® GPA System Analyzer after the Clear and Shader Change Applied ....................... 63
Figure 17 Light Shaft Blur and Bloom Disabled - Clearly not a Desirable Change ........................... 64
2.2.4 Key Takeaways from this Analysis .............................................. 65
3 Support ........................................................................................................... 66
4 References ....................................................................................................... 67
5 Optimization Notice ........................................................................................... 68
How to maximize graphics performance on Intel® Integrated Graphics 7
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