Debug, Analyze and Optimize Games with Intel Tools
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This document summarizes an introduction to the Intel Graphics Performance Analyzers (Intel GPA) tool. The presentation provides an overview of Intel GPA's capabilities for optimizing game performance on Intel graphics through in-game analysis, frame capture, and trace analysis. It demonstrates Intel GPA's system analyzer, frame analyzer and trace analyzer features. The document also gives examples of optimizations that can be achieved through techniques like script culling, memory management, occlusion culling, level of detail modeling and terrain optimization.
![Legal Notices and Disclaimers
No license (express or implied, by estoppel or otherwise) to any intellectual property rights is granted by this document.
Intel disclaims all express and implied warranties, including without limitation, the implied warranties of merchantability, fitness for a particular purpose, and non-infringement, as well
as any warranty arising from course of performance, course of dealing, or usage in trade.
You may not use or facilitate the use of this document in connection with any infringement or other legal analysis concerning Intel products described herein. You agree to grant Intel
a non-exclusive, royalty-free license to any patent claim thereafter drafted which includes subject matter disclosed herein.
The products and services described may contain defects or errors known as errata which may cause deviations from published specifications. Current characterized errata are
available on request.
Intel technologies’ features and benefits depend on system configuration and may require enabled hardware, software or service activation. Performance varies depending on
system configuration. No computer system can be absolutely secure. Check with your system manufacturer or retailer or learn more at [intel.com].
Software and workloads used in performance tests may have been optimized for performance only on Intel microprocessors. Performance tests, such as SYSmark and MobileMark,
are measured using specific computer systems, components, software, operations and functions. Any change to any of those factors may cause the results to vary. You should
consult other information and performance tests to assist you in fully evaluating your contemplated purchases, including the performance of that product when combined with other
products. For more complete information visit www.intel.com/benchmarks.
Optimization Notice: Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors.
These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any
optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain
optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information
regarding the specific instruction sets covered by this notice.
Results have been estimated or simulated using internal Intel analysis or architecture simulation or modeling, and provided to you for informational purposes. Any differences in your
system hardware, software or configuration may affect your actual performance.
Intel, Atom and the Intel logo are trademarks of Intel Corporation in the U.S. and/or other countries.
*Other names and brands may be claimed as the property of others
© Intel Corporation.
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Debug, Analyze and Optimize Games with Intel Tools
- 1. Debug, Analyze and Optimize Games with Intel Tools Surviving the apocalypse on mainstream graphics Matteo Valoriani, FifthIngenium CEO Intel Software Innovator
- 2. Nice to Meet You www.slideshare.net/MatteoValoriani https://it.linkedin.com/in/matteovaloriani http://fifthingenium.com/blog https://github.com/mvaloriani mvaloriani at gmail dot com @MatteoValoriani Matteo Valoriani CEO of FifthIngenium PhD at Politecnico of Milano Speaker and Consultant 2
- 3. Agenda 3 • Introduction • Intel® Graphics Performance Analyzers .. What ? • Intel® GPA Live Demo • Optimizations • Conclusion
- 4. 4
- 5. PC Virtual Reality Mobile
- 6. 6 Getting Started with Intel® Graphics Performance Analyzers (Intel® GPA) https://goo.gl/2cKmMa
- 7. Intel® Graphics Performance Analyzers 2017 R1
- 8. 8 How to Get Started? Download for FREE at https://software.intel.com/gpa/ • No Code Changes Needed • No Environment Changes • No IDE Necessary
- 9. 9 Intel® GPA - Optimize Your Graphics Applications! High–End GPU Mainstream Graphics 10fps 5fps 60+ fps 5fps 30 fps 30+ fps Intel® Graphics Performance Analyzers
- 10. Host OS ▪ Win 7, Win 8.1, Win 10 (64- bit) DirectX* ▪ DX 9, 9EX, 10.x, 11.0, 11.1, 12 Target Hardware ▪ Intel, NVidia* & AMD* GPUs ▪ Windows x86 Tablets ▪ HTC Vive*, Oculus Rift* 10 Optimize Windows*, Android*, and Ubuntu* Games! Windows Gaming Android Gaming Host OS ▪ Windows, Ubuntu, Mac* OSX OpenGL* ES ▪ 1.x, 2.x, 3.x Target Hardware ▪ Intel Atom® Android OS ▪ 4.x, 5.x, 6.x Ubuntu Gaming Host OS ▪ Ubuntu 16.04 OpenGL ▪ 3.2, 3.3, 4.0, 4.1 (Core Profile) Target Hardware ▪ Intel® HD Graphics 4k-6k Target OS ▪ Ubuntu 16.04
- 11. 11 Host/Target Architecture Host System Target System
- 12. 12 What’s Inside Intel® GPA? System Analyzer / HUD Graphics Frame Analyzer In-game analysis Single frame analysisTimeline analysis Graphics Monitor Launch & config tool Graphics Trace Analyzer
- 13. 13 How to Use Intel® GPA? HUD / System Analyzer: Frame Analyzer: Trace Analyzer: CPU Limited GPU Limited Capture Frame Capture Trace ?Run with Intel® GPA In-Game Analysis Offline Analysis
- 14. 14 Graphics Monitor Launch & config tool Define profiles & preferences
- 15. 15 System Analyzer / HUD In-game analysis • Get metrics for CPU, GPU, graphics drivers, DirectX*, OpenGL*, or OpenGL* ES • Experiment with override modes that quickly isolate common performance bottlenecks • Capture frames and traces for further analysis • Display up to 16 performance metrics simultaneously • Monitor the current, minimum, and maximum frame rate • Use without code modifications or special libraries
- 16. 16 System Analyzer / HUD
- 17. Live Analysis 17
- 18. 18 Graphics Frame Analyzer In-game analysis • Use the API log to identify visual errors by function and call errors and warnings to graphics APIs • Select a draw call and verify its contribution to the frame, alpha channel, color, format, and depth buffers • Quantify performance optimization opportunities with render experiments per draw call • Solve issues with shadowing, lighting, or color schemes by locating misplaced objects
- 20. Performance Analysis with Hardware Metrics Evaluation Flow to find 3D hotspots 20
- 21. 21 Published in the 6th generation graphics API dev guide : https://software.intel.com/en-us/articles/6th-gen-graphics-api-dev-guide
- 22. 22
- 23. 23 Graphics Trace Analyzer Single frame analysis
- 24. 24 Optimizations
- 25. 25 Script Frustum Culling and Co-routines Use the following Monobehavior callbacks to cull scripts outside of the camera frustum that do not need to update when not in focus. Monobehavior callbacks which trigger when object with script leaves / enters the camera frustum
- 26. 26 Script Frustum Culling and Co-routines (2) Co-routines are essentially functions with the ability to pause and resume execution. The power of co-routines can be leveraged by removing the original Update() function in your script and replacing it with a co-routine. You can then set how often you would like your co- routine to execute using the yield command.
- 27. 27 Memory Management Optimization A great way to get an overview of how you are managing memory is to check the ‘GC Alloc’ section of the Overview window in Unity Profiler and step through your frames until you see a significant allocation. • To avoid frequent allocations, it is advantageous to use structs instead of classes to have allocations be done on the stack, instead of in the heap. • Multiple allocations to the heap can lead to significant memory fragmentation and frequent garbage collections.
- 28. 28 Occlusion Culling Occlusion culling is a feature available in Unity that enables you to cull out objects that are occluded by other objects with respect to the camera.
- 29. 29 Occlusion Culling 1. Go through your entire scene to multi-select any objects that should be included in occlusion culling calculations and mark them as “Occluder Static” and “Occludee Static”. 2. When setting up your occlusion culling system, set your occlusion areas carefully.By default, Unity uses the entire scene as the occlusion area, which can lead to frivolous computation. 3. To make sure that the entire scene isn’t used, create an occlusion area manually and surround only the area to be included in the calculation.
- 30. 30 LOD Level of Detail (LOD) allows multiple meshes to attach to a game object and provides the ability to switch between meshes the object uses based on camera distance. The LOD can automatically simplify the mesh to compensate. LOD L0 L1 L2 fps 160 180 220
- 31. 31 Terrain Optimization • Sampler limited • No dynamic branching • Optimized for Legacy HW where sampling was faster than computing LODs • Implementation of dynamic branching increased perf by 2x ( 3ms -> 1.5ms) • Using samplegrad for dynamic LOD selection
- 32. Conclusion 32
- 33. 33 Conclusion With the right tools : and the right methodology, finding performance bottlenecks is easy !
- 34. Questions ? 34
- 36. Legal Notices and Disclaimers No license (express or implied, by estoppel or otherwise) to any intellectual property rights is granted by this document. Intel disclaims all express and implied warranties, including without limitation, the implied warranties of merchantability, fitness for a particular purpose, and non-infringement, as well as any warranty arising from course of performance, course of dealing, or usage in trade. You may not use or facilitate the use of this document in connection with any infringement or other legal analysis concerning Intel products described herein. You agree to grant Intel a non-exclusive, royalty-free license to any patent claim thereafter drafted which includes subject matter disclosed herein. The products and services described may contain defects or errors known as errata which may cause deviations from published specifications. Current characterized errata are available on request. Intel technologies’ features and benefits depend on system configuration and may require enabled hardware, software or service activation. Performance varies depending on system configuration. No computer system can be absolutely secure. Check with your system manufacturer or retailer or learn more at [intel.com]. Software and workloads used in performance tests may have been optimized for performance only on Intel microprocessors. Performance tests, such as SYSmark and MobileMark, are measured using specific computer systems, components, software, operations and functions. Any change to any of those factors may cause the results to vary. You should consult other information and performance tests to assist you in fully evaluating your contemplated purchases, including the performance of that product when combined with other products. For more complete information visit www.intel.com/benchmarks. Optimization Notice: Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice. Results have been estimated or simulated using internal Intel analysis or architecture simulation or modeling, and provided to you for informational purposes. Any differences in your system hardware, software or configuration may affect your actual performance. Intel, Atom and the Intel logo are trademarks of Intel Corporation in the U.S. and/or other countries. *Other names and brands may be claimed as the property of others © Intel Corporation. 36