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Increase buffer count to prevent starvation on AMD GPUs

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This commit is contained in:
Cameron Gutman 2022-04-14 23:21:32 -05:00
parent cf16c31d38
commit 62136a1a96
1 changed files with 12 additions and 2 deletions
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14
app/streaming/video/ffmpeg-renderers/d3d11va.cpp
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@ -241,8 +241,18 @@ bool D3D11VARenderer::initialize(PDECODER_PARAMETERS params)
swapChainDesc.AlphaMode = DXGI_ALPHA_MODE_UNSPECIFIED;
swapChainDesc.Flags = 0;
// 1 front buffer + 1 back buffer + 1 extra for DWM to hold on to for Flip modes
swapChainDesc.BufferCount = 3;
// 3 front buffers (default GetMaximumFrameLatency() count)
// + 1 back buffer
// + 1 extra for DWM to hold on to for DirectFlip
//
// Even though we allocate 3 front buffers for pre-rendered frames,
// they won't actually increase presentation latency because we
// always use SyncInterval 0 which replaces the last one. See
// the SetMaximumFrameLatency comment below for more details.
//
// NB: 3 total buffers seems sufficient on NVIDIA hardware but
// causes performance issues (buffer starvation) on AMD GPUs.
swapChainDesc.BufferCount = 3 + 1 + 1;
DXGI_SWAP_CHAIN_FULLSCREEN_DESC fullScreenDesc = {};