Efficient Rendering with DirectX 12 on Intel Graphics

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Performance – Improve CPU bound games – Improve multi-core scaling Power – Improve performance on power-constrained platforms – Improve heat and battery life How? Why <strong>DirectX</strong> <strong>12</strong>? – Reduce CPU overhead of rendering Copyright © 2015, Intel Corporation. All rights reserv ed. *Other names and brands may be claimed as the property of others. 4
Graphics APIs and Overhead Most GPU vendors have complex drivers – Do lots of fancy optimizations on the fly – Costs CPU, but makes the GPU run faster That’s ok, reviews compare GPUs using fast CPUs! Drivers spawn threads that conflict <strong>with</strong> application – Driver thread often consumes an entire core by itself – Plus another core for the game submission thread – Minimal multithreading beyond these two threads Copyright © 2015, Intel Corporation. All rights reserv ed. *Other names and brands may be claimed as the property of others. 5
Page 1 and 2: Efficient
Page 3: Decoder Cheat-sheet Intel 4 th Gen
Page 7 and 8: Thinner Intel Graphics Driver To a
Page 9 and 10: DirectX 12
Page 11 and 12: Commands and State Copyright © 201
Page 13 and 14: Commands in DirectX</strong
Page 15 and 16: DirectX 11 Deferre
Page 17 and 18: Commands in DirectX</strong
Page 19 and 20: Pipeline State Objects Create PSOs
Page 21 and 22: DirectX 12
Page 23 and 24: Multi-engine on Haswell/Broadwell
Page 25 and 26: GPU Memory in WDDM 1.x Previous AP
Page 27 and 28: Memory Residency Best Practices Al
Page 29 and 30: Typical Discrete GPU Memory Applica
Page 31 and 32: Haswell GPU Virtual Address Limit
Page 33 and 34: Resource Binding Copyright © 2015,
Page 35 and 36: Resource Descriptors Not an API ob
Page 37 and 38: Root Signature Think of it like a
Page 39 and 40: Root Constants Pass a small number
Page 41 and 42: Descriptor Tables Maps continuous
Page 43 and 44: Root Signature Example Root Signatu
Page 45 and 46: Root Signature Example (HLSL) Root
Page 47 and 48: Binding Example Root Signature 0 De
Page 49 and 50: Haswell/Broadwell Resource Binding
Page 51 and 52: Haswell/Broadwell Descriptor Tables
Page 53 and 54: Haswell/Broadwell Descriptor Tables
Page 55 and 56:
Resource Binding Summary Minimize
Page 57 and 58:
Summary Copyright © 2015, Intel Co
Page 59:
Questions? Follow @DirectX
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Efficient Rendering with DirectX 12 on Intel Graphics

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