Efficient Rendering with DirectX 12 on Intel Graphics

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Bundles Reusable command lists to further lower CPU overhead Some minimal state inheritance is allowed – Some patching may occur at submission time – If you don’t need to inherit something, set it (again) in the bundle Overhead is already very low in <strong>DirectX</strong> <strong>12</strong> – Need ~10+ draws to make bundles a win on Haswell/Broadwell – Only consider bundles if you have lots of static draws that can’t reasonably be combined (via instancing or similar) – Don’t add any GPU overhead/indirections to enable bundles! Copyright © 2015, Intel Corporation. All rights reserv ed. *Other names and brands may be claimed as the property of others. 20
<strong>DirectX</strong> <strong>12</strong> expands on DrawIndirect/DispatchIndirect Command Signature – Indirect Argument Buffer Format – Draw/Dispatch calls – Resource Bindings Indirect Argument Buffer – Dynamic parameters Count Buffer Execute Indirect IB VB Draw UAV CBV Draw IB Args VB Args Draw Args UAV Args CBV Args Draw Args IB Args VB Args Draw Args UAV Args CBV Args Draw Args Copyright © 2015, Intel Corporation. All rights reserv ed. *Other names and brands may be claimed as the property of others. 21
Page 1 and 2: Efficient
Page 3 and 4: Decoder Cheat-sheet Intel 4 th Gen
Page 5 and 6: Graphics APIs and Overhead Most GP
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: Pipeline State Objects Create PSOs
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

Efficient Rendering with DirectX 12 on Intel Graphics

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