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Optick: Eliminate need for blocking sleep wait at start of Vulkan clock sync

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This commit is contained in:
Stephen Saunders 2024-03-07 13:54:35 -05:00
parent bcbc734d94
commit 75011c4eea
1 changed files with 12 additions and 5 deletions
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17
neo/libs/optick/optick_gpu.vulkan.cpp
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@ -477,14 +477,11 @@ namespace Optick
VkDevice Device = node.device;
VkFence Fence = currentFrame.fence;
// SRS - Prepare and submit an empty command buffer to wait on app buffer completion
(*vulkanFunctions.vkWaitForFences)(Device, 1, &Fence, 1, (uint64_t)-1);
(*vulkanFunctions.vkResetFences)(Device, 1, &Fence);
(*vulkanFunctions.vkResetEvent)(Device, nodePayloads[nodeIndex]->event);
(*vulkanFunctions.vkResetCommandBuffer)(CB, VK_COMMAND_BUFFER_RESET_RELEASE_RESOURCES_BIT);
(*vulkanFunctions.vkBeginCommandBuffer)(CB, &commandBufferBeginInfo);
(*vulkanFunctions.vkCmdResetQueryPool)(CB, nodePayloads[nodeIndex]->queryPool, 0, 1);
(*vulkanFunctions.vkCmdWaitEvents)(CB, 1, &nodePayloads[nodeIndex]->event, VK_PIPELINE_STAGE_HOST_BIT, VK_PIPELINE_STAGE_HOST_BIT | VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT, 0, nullptr, 0, nullptr, 0, nullptr);
(*vulkanFunctions.vkCmdWriteTimestamp)(CB, VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT, nodePayloads[nodeIndex]->queryPool, 0);
(*vulkanFunctions.vkEndCommandBuffer)(CB);
VkSubmitInfo submitInfo = {};
@ -498,9 +495,19 @@ namespace Optick
submitInfo.pSignalSemaphores = nullptr;
(*vulkanFunctions.vkQueueSubmit)(nodePayloads[nodeIndex]->queue, 1, &submitInfo, Fence);
// SRS - Prepare and submit the actual command buffer used for clock synchronization
(*vulkanFunctions.vkWaitForFences)(Device, 1, &Fence, 1, (uint64_t)-1);
(*vulkanFunctions.vkResetFences)(Device, 1, &Fence);
(*vulkanFunctions.vkResetEvent)(Device, nodePayloads[nodeIndex]->event);
(*vulkanFunctions.vkBeginCommandBuffer)(CB, &commandBufferBeginInfo);
(*vulkanFunctions.vkCmdResetQueryPool)(CB, nodePayloads[nodeIndex]->queryPool, 0, 1);
(*vulkanFunctions.vkCmdWaitEvents)(CB, 1, &nodePayloads[nodeIndex]->event, VK_PIPELINE_STAGE_HOST_BIT, VK_PIPELINE_STAGE_HOST_BIT | VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT, 0, nullptr, 0, nullptr, 0, nullptr);
(*vulkanFunctions.vkCmdWriteTimestamp)(CB, VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT, nodePayloads[nodeIndex]->queryPool, 0);
(*vulkanFunctions.vkEndCommandBuffer)(CB);
(*vulkanFunctions.vkQueueSubmit)(nodePayloads[nodeIndex]->queue, 1, &submitInfo, Fence);
// SRS - Improve GPU to CPU clock offset calibration by using Vulkan events
// thanks to cdwfs for concept at https://gist.github.com/cdwfs/4222ca09cb259f8dd50f7f2cf7d09179
std::this_thread::sleep_for(std::chrono::seconds(1));
(*vulkanFunctions.vkSetEvent)(Device, nodePayloads[nodeIndex]->event);
clock.timestampCPU = GetHighPrecisionTime();
(*vulkanFunctions.vkWaitForFences)(Device, 1, &Fence, 1, (uint64_t)-1);