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[host] measure ready time at framebuffer publication

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Exclude command queue reset and cleanup from the ready stage, and keep
the wall-clock residual only as the legacy timing fallback.
This commit is contained in:
Geoffrey McRae
2026-08-03 16:22:07 +10:00
parent aa289fa022
commit 24be0a8869
16 changed files with 157 additions and 67 deletions
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44
idd/LGIdd/CD3D12CommandQueue.cpp
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@@ -56,7 +56,7 @@ bool CD3D12CommandQueue::InitTiming(ID3D12Device3 * device,
D3D12_QUERY_HEAP_DESC queryDesc = {};
queryDesc.Type = D3D12_QUERY_HEAP_TYPE_COPY_QUEUE_TIMESTAMP;
queryDesc.Count = 1;
queryDesc.Count = 2;
hr = device->CreateQueryHeap(&queryDesc, IID_PPV_ARGS(&m_timestampHeap));
if (FAILED(hr))
@@ -71,7 +71,7 @@ bool CD3D12CommandQueue::InitTiming(ID3D12Device3 * device,
D3D12_RESOURCE_DESC resourceDesc = {};
resourceDesc.Dimension = D3D12_RESOURCE_DIMENSION_BUFFER;
resourceDesc.Width = sizeof(UINT64);
resourceDesc.Width = sizeof(UINT64) * 2;
resourceDesc.Height = 1;
resourceDesc.DepthOrArraySize = 1;
resourceDesc.MipLevels = 1;
@@ -91,7 +91,7 @@ bool CD3D12CommandQueue::InitTiming(ID3D12Device3 * device,
return false;
}
D3D12_RANGE readRange = { 0, sizeof(UINT64) };
D3D12_RANGE readRange = { 0, sizeof(UINT64) * 2 };
void * timestampMap = nullptr;
hr = m_timestampReadback->Map(0, &readRange, &timestampMap);
if (FAILED(hr))
@@ -298,37 +298,47 @@ void CD3D12CommandQueue::EndTiming()
if (!m_timingActive)
return;
m_gfxList->EndQuery(
m_timestampHeap.Get(), D3D12_QUERY_TYPE_TIMESTAMP, 1);
m_gfxList->ResolveQueryData(
m_timestampHeap.Get(), D3D12_QUERY_TYPE_TIMESTAMP,
0, 1, m_timestampReadback.Get(), 0);
0, 2, m_timestampReadback.Get(), 0);
}
bool CD3D12CommandQueue::GetGPUStartTime(uint64_t& start)
bool CD3D12CommandQueue::ConvertGPUTimestamp(
UINT64 timestamp, uint64_t& result) const
{
if (!m_timingActive)
return false;
const UINT64 gpuStart = m_timestampMap[0];
UINT64 cpuStart;
if (gpuStart < m_calibrationGPU)
UINT64 cpuTimestamp;
if (timestamp < m_calibrationGPU)
{
const UINT64 delta = ScaleTicks(
m_calibrationGPU - gpuStart, m_qpcFrequency, m_timestampFrequency);
m_calibrationGPU - timestamp, m_qpcFrequency, m_timestampFrequency);
if (delta > m_calibrationCPU)
return false;
cpuStart = m_calibrationCPU - delta;
cpuTimestamp = m_calibrationCPU - delta;
}
else
{
const UINT64 delta = ScaleTicks(
gpuStart - m_calibrationGPU, m_qpcFrequency, m_timestampFrequency);
timestamp - m_calibrationGPU, m_qpcFrequency, m_timestampFrequency);
if (UINT64_MAX - m_calibrationCPU < delta)
return false;
cpuStart = m_calibrationCPU + delta;
cpuTimestamp = m_calibrationCPU + delta;
}
start = TicksToNanoseconds(cpuStart, m_qpcFrequency);
result = TicksToNanoseconds(cpuTimestamp, m_qpcFrequency);
return true;
}
bool CD3D12CommandQueue::GetGPUTimes(
uint64_t& start, uint64_t& end) const
{
if (!m_timingActive ||
!ConvertGPUTimestamp(m_timestampMap[0], start) ||
!ConvertGPUTimestamp(m_timestampMap[1], end) ||
end < start)
return false;
return true;
}