encounter
/
dawn-cmake
mirror of https://github.com/encounter/dawn-cmake.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Support for small resource placement for MSAA textures. 

Enables use of 64KB texture alignments where permitted.
This saves heap memory (64KB vs 4MB per allocation) and
improves re-use.

BUG=dawn:27

Change-Id: Ief4c531446788284e69ec1646cfe2ea7a25c7bb2
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/14683
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Bryan Bernhart <bryan.bernhart@intel.com>
This commit is contained in:
Bryan Bernhart 2019-12-20 17:42:30 +00:00 committed by Commit Bot service account
parent f58f69f66b
commit cd1152fb9b
1 changed files with 29 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

46
src/dawn_native/d3d12/ResourceAllocatorManagerD3D12.cpp
View File

@ -108,6 +108,28 @@ namespace dawn_native { namespace d3d12 {
UNREACHABLE();
}
}
uint64_t GetResourcePlacementAlignment(ResourceHeapKind resourceHeapKind,
uint32_t sampleCount,
uint64_t requestedAlignment) {
switch (resourceHeapKind) {
// Small resources can take advantage of smaller alignments. For example,
// if the most detailed mip can fit under 64KB, 4KB alignments can be used.
// Must be non-depth or without render-target to use small resource alignment.
// This also applies to MSAA textures (4MB => 64KB).
//
// Note: Only known to be used for small textures; however, MSDN suggests
// it could be extended for more cases. If so, this could default to always
// attempt small resource placement.
// https://docs.microsoft.com/en-us/windows/win32/api/d3d12/ns-d3d12-d3d12_resource_desc
case Default_OnlyNonRenderableOrDepthTextures:
return (sampleCount > 1) ? D3D12_SMALL_MSAA_RESOURCE_PLACEMENT_ALIGNMENT
: D3D12_SMALL_RESOURCE_PLACEMENT_ALIGNMENT;
default:
return requestedAlignment;
}
}
} // namespace
ResourceAllocatorManager::ResourceAllocatorManager(Device* device) : mDevice(device) {
@ -191,31 +213,21 @@ namespace dawn_native { namespace d3d12 {
D3D12_HEAP_TYPE heapType,
const D3D12_RESOURCE_DESC& requestedResourceDescriptor,
D3D12_RESOURCE_STATES initialUsage) {
const size_t resourceHeapKindIndex =
const ResourceHeapKind resourceHeapKind =
GetResourceHeapKind(requestedResourceDescriptor.Dimension, heapType,
requestedResourceDescriptor.Flags, mResourceHeapTier);
// Small resources can take advantage of smaller alignments. For example,
// if the most detailed mip can fit under 64KB, 4KB alignments can be used.
// Must be non-depth or without render-target to use small resource alignment.
//
// Note: Only known to be used for small textures; however, MSDN suggests
// it could be extended for more cases. If so, this could default to always attempt small
// resource placement.
// https://docs.microsoft.com/en-us/windows/win32/api/d3d12/ns-d3d12-d3d12_resource_desc
D3D12_RESOURCE_DESC resourceDescriptor = requestedResourceDescriptor;
resourceDescriptor.Alignment =
(resourceHeapKindIndex == Default_OnlyNonRenderableOrDepthTextures)
? D3D12_SMALL_RESOURCE_PLACEMENT_ALIGNMENT
: requestedResourceDescriptor.Alignment;
resourceDescriptor.Alignment = GetResourcePlacementAlignment(
resourceHeapKind, requestedResourceDescriptor.SampleDesc.Count,
requestedResourceDescriptor.Alignment);
D3D12_RESOURCE_ALLOCATION_INFO resourceInfo =
mDevice->GetD3D12Device()->GetResourceAllocationInfo(0, 1, &resourceDescriptor);
// If the request for small resource alignment was rejected, let D3D tell us what the
// If the requested resource alignment was rejected, let D3D tell us what the
// required alignment is for this resource.
if (resourceHeapKindIndex == Default_OnlyNonRenderableOrDepthTextures &&
resourceInfo.Alignment != D3D12_SMALL_RESOURCE_PLACEMENT_ALIGNMENT) {
if (resourceDescriptor.Alignment != resourceInfo.Alignment) {
resourceDescriptor.Alignment = 0;
resourceInfo =
mDevice->GetD3D12Device()->GetResourceAllocationInfo(0, 1, &resourceDescriptor);
@ -225,7 +237,7 @@ namespace dawn_native { namespace d3d12 {
}
BuddyMemoryAllocator* allocator =
mSubAllocatedResourceAllocators[resourceHeapKindIndex].get();
mSubAllocatedResourceAllocators[static_cast<size_t>(resourceHeapKind)].get();
ResourceMemoryAllocation allocation;
DAWN_TRY_ASSIGN(allocation,