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[d3d11] Allocate DYNAMIC buffers on device-local host-visible memory 

Improves performance on AMD cards when GPU-bound.
~5% FPS increase in The Witcher 3.
This commit is contained in:
Philip Rebohle 2018-05-29 14:50:08 +02:00
parent a9eff13b92
commit c600b43d73
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GPG Key ID: C8CC613427A31C99
1 changed files with 9 additions and 1 deletions
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10
src/d3d11/d3d11_buffer.cpp
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@ -130,7 +130,7 @@ namespace dxvk {
// Default constant buffers may get updated frequently, in which
// case mapping the buffer is faster than using update commands.
VkMemoryPropertyFlags memoryFlags = GetMemoryFlagsForUsage(pDesc->Usage);
if ((pDesc->Usage == D3D11_USAGE_DEFAULT) && (pDesc->BindFlags & D3D11_BIND_CONSTANT_BUFFER)) {
info.stages |= VK_PIPELINE_STAGE_HOST_BIT;
info.access |= VK_ACCESS_HOST_WRITE_BIT;
@ -139,6 +139,14 @@ namespace dxvk {
| VK_MEMORY_PROPERTY_HOST_COHERENT_BIT;
}
// AMD cards have a device-local, host-visible memory type where
// we can put dynamic resources that need fast access by the GPU
if ((pDesc->Usage == D3D11_USAGE_DYNAMIC) && (pDesc->BindFlags & (
D3D11_BIND_VERTEX_BUFFER | D3D11_BIND_INDEX_BUFFER |
D3D11_BIND_SHADER_RESOURCE | D3D11_BIND_UNORDERED_ACCESS |
D3D11_BIND_CONSTANT_BUFFER)))
memoryFlags |= VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT;
return m_device->GetDXVKDevice()->createBuffer(info, memoryFlags);
}