Get the most out of mobile with Vulkan in Unity
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This presentation discusses how to get the most out of mobile graphics using Vulkan in Unity. It covers the benefits of Vulkan like multi-threading and multi-pass rendering. It also demonstrates Vulkan's performance improvements over OpenGL ES in a game called Sky Force Reloaded, showing speedups of 15-32% and lower power consumption. Finally, it discusses integrating the Mali Graphics Debugger tool into Unity to debug Vulkan applications.
Get the most out of mobile with Vulkan in Unity
- 1. Get the Most Out of Mobile withVulkan in Unity Roberto Lopez Mendez DevGAMM Moscow 2017 Senior Engineer 18/05/2017
- 2. ©ARM20172 Agenda The benefits of theVulkan graphics API Multi-threading Multipass Vulkan vs OpenGL ES with Sky Force Reloaded Mali Graphics Debugger (MGD) Integration in Unity Live demo Wrap up
- 3. ©ARM 20173 The benefits of theVulkan graphics API
- 4. ©ARM20174 Multi-threading / multicore efficiency Created from the ground to be thread-friendly Multi-threading widely considered in the specs Multi-threading responsibility moved to application level The application has better visibility Efficient utilization of multiprocessor architecture Lower CPU load and energy consumption Spread work out faster to multiple cores Able to schedule and migrate tasks between ARM ® big.LITTLETM cores according to the load
- 5. ©ARM20175 Multi-pass rendering Everything is declared ahead of time in the render pass Each sub pass can specify different outputs and they can be chained together Very performant in tiled GPUs such as ARM Mali GPUs Each pixel in a sub-pass can access the result of the previous sub-pass All data can be contained on the fast on-chip memory, saving bandwidth Example of use-cases: Deferred rendering Soft-particles Tone-mapping
- 6. ©ARM20176 Vulkan benefits in Lofoten demo SCENE INFO • ~ 100 lights with shadow maps • 3M primitives (reduced to 500K with very efficient occlusion culling) • 500 draw calls • Sun light with cascade shadow map • ~ 10 reflection probes • FFT compute in ocean rendering • Deferred shading using multi-pass • 10x less load on CPU with multithreading
- 7. ©ARM 20177 Sky Force Reloaded with Vulkan and Unity
- 8. ©ARM20178 What is Sky Force Reloaded? Modern shoot‘em experience Intense action, very rich graphics Pushing CPU and GPU to the limits
- 9. ©ARM20179
- 10. ©ARM201710 Performance issues in Sky Force Reloaded Performance issues on OpenGL ES Even on high-end devices it was not possible to maintain 60 FPS all of the time Fill rate was not the bottleneck Up to 1000 draw calls per frame CPU was spending a lot of time preparing data for GPU
- 11. ©ARM201711 Performance benchmark Draw calls are expensive OpenGL ES driver is not optimal PerhapsVulkan can help? Vulkan is supported by Unity!
- 12. ©ARM201712 Sky Force Reloaded:Vulkan vs OpenGL ES Best case 21% faster using Vulkan. On average 15% faster using Vulkan.
- 13. ©ARM201713 Sky Force Reloaded: Increased workload Best case 82% faster using Vulkan. On average 32% faster using Vulkan.
- 14. ©ARM201714 Extra power enabled byVulkan More content Add more particle, objects or animations Keep the same FPS with richer graphics
- 15. ©ARM201715
- 16. ©ARM201716 Power consumption test Power consumption is a problem Players were not happy Console-like quality games consume a lot of power Can Vulkan help?
- 17. ©ARM201717
- 18. ©ARM201718 Power consumption test Vulkan consumed 10 to 12% less power in the game Majority of savings come from the CPU Extra minutes of playtime with Vulkan!
- 19. ©ARM201719 Summary Great to use “out of the box” Improves your FPS Adds some extra minutes of playtime You can add some more graphics and make your game look better
- 20. ©ARM 201720 Mali Graphics Debugger (MGD) integration in Unity
- 21. ©ARM201721 Mali Graphics Debugger (MGD) Draw-call by Draw-call stepping To identify draw call related issues, redundant draw calls and other opportunities to optimize TextureView Visualize an application’s texture usage, to identify opportunities to compress textures or change formats Shader Statistics Understand which vertex and fragment shaders are the most expensive with cycle count reporting Vertex Attribute / UniformView See vertex data and index buffers StateView Full visibility of graphics state and tracking of state changes Dynamic Optimization Advice Highlighting of common API misusage and dynamic performance improvement advice Download MGD for free at developer.arm.com
- 22. ©ARM201722 Mali Graphics Debugger Vulkan adb install -r MGD.apk adb install -r MGD.apk OpenGL ES Assets/Plugins/Android/libs/armeabi-v7a/ libVkLayerMGD32.so
- 23. ©ARM 201723 Live demo: debugging Unity application with MGD
- 24. ©ARM201724 Wrap Up APPLICATION Single threaded/context ARM Mali GPU DRIVER Context management Memory management Error management GLSL compiler CPU overhead APPLICATION Memory management Thread management Multi-threaded command buffers SPIR-V shader pre- compilation ARM Mali GPU DRIVER Very Light Driver Lower overall power consumption VULKAN BENEFITS • Portability across multiple platforms • Native thread friendly • Efficient utilization of multiprocessor architecture • Lower CPU load • Reduced energy consumption • Extra benefits for mobile platform and tiling architectures such as ARM Mali GPUs • Pixel access to result of previous sub-pass • Data contained on fast on-chip memory • Memory bandwidth saving • Loadable validation and debug layers Mali Graphics Debugger
- 25. ©ARM201725 AddVulkan to the list of Graphics API – save performance, battery last longer Upgrade to Unity 5.6 – very easy to use MGD as it is integrated into Unity Takeaways
- 26. The trademarks featured in this presentation are registered and/or unregistered trademarks of ARM Limited (or its subsidiaries) in the EU and/or elsewhere. All rights reserved. All other marks featured may be trademarks of their respective owners. Copyright © 2017 ARM Limited Thank you Questions
- 27. ©ARM201727 Find out more info about the topics of this talk at: • https://www.youtube.com/watch?v=VCSkp-QZ37M • https://www.youtube.com/watch?v=WI7nXq8oozw • https://community.arm.com/graphics/b/blog/posts/mgd-integration-in-unity • https://developer.arm.com/products/software-development-tools/graphics-development-tools/mali-graphics-debugger • https://developer.arm.com/products/software-development-tools/ds-5-development-studio/resources/ds-5-media- articles/2017/04/mali-graphics-debugger-introduction-part-1 • https://developer.arm.com/products/software-development-tools/ds-5-development-studio/resources/ds-5-media- articles/2017/04/mali-graphics-debugger-introduction-part-2 • http://malideveloper.arm.com/armunityguide • https://developer.arm.com/graphics/unity/unity-engine-tutorials • https://developer.arm.com/graphics/vulkan/vulkan-tutorials To find out more….