Efficient Rendering with DirectX 12 on Intel Graphics

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CPU/GPU Optimization Tradeoff Has recently become far more serious <strong>with</strong> SoCs – Even if not “CPU bound”, CPU/GPU share power – More CPU load => less GPU power/performance Complex CPU optimizations are not a good idea… – Tax on all applications, even well-optimized ones – CPU work can take more power than it saves on the GPU! – Leads to lower overall performance Copyright © 2015, Intel Corporation. All rights reserv ed. *Other names and brands may be claimed as the property of others. 6
Thinner Intel Graphics Driver To address this, Intel wrote a much thinner DX11 driver – Introduced <strong>with</strong> Haswell Big benefit to well-written applications – But does far less work to make poor ones run well – i.e. no redundant state elimination, minimal state-based shader recompiles, etc. Still unavoidable CPU overhead due to API design – <strong>DirectX</strong> <strong>12</strong> addresses this Copyright © 2015, Intel Corporation. All rights reserv ed. *Other names and brands may be claimed as the property of others. 7
Page 1 and 2: Efficient
Page 3 and 4: Decoder Cheat-sheet Intel 4 th Gen
Page 5: Graphics APIs and Overhead Most GP
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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