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Use semaphores for presentation engine frame synchronisation

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Avoids waits on the CPU which can be costly and confuse the scheduler, also reduces latency significantly.
This commit is contained in:
Billy Laws
2022-10-16 20:47:17 +01:00
parent 0670e0e0dc
commit 1a0819fb76
4 changed files with 106 additions and 87 deletions
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158
app/src/main/cpp/skyline/gpu/texture/texture.cpp
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@ -839,14 +839,16 @@ namespace skyline::gpu {
return std::make_shared<TextureView>(shared_from_this(), type, range, pFormat, mapping);
}
void Texture::CopyFrom(std::shared_ptr<Texture> source, const vk::ImageSubresourceRange &subresource) {
WaitOnBacking();
source->WaitOnBacking();
void Texture::CopyFrom(std::shared_ptr<Texture> source, vk::Semaphore waitSemaphore, vk::Semaphore signalSemaphore, const vk::ImageSubresourceRange &subresource) {
if (cycle)
cycle->WaitSubmit();
if (source->cycle)
source->cycle->WaitSubmit();
WaitOnBacking();
source->WaitOnBacking();
WaitOnFence();
if (source->layout == vk::ImageLayout::eUndefined)
throw exception("Cannot copy from image with undefined layout");
else if (source->dimensions != dimensions)
@ -854,78 +856,92 @@ namespace skyline::gpu {
TRACE_EVENT("gpu", "Texture::CopyFrom");
auto lCycle{gpu.scheduler.Submit([&](vk::raii::CommandBuffer &commandBuffer) {
auto sourceBacking{source->GetBacking()};
if (source->layout != vk::ImageLayout::eTransferSrcOptimal) {
commandBuffer.pipelineBarrier(vk::PipelineStageFlagBits::eTopOfPipe, vk::PipelineStageFlagBits::eTransfer, {}, {}, {}, vk::ImageMemoryBarrier{
.image = sourceBacking,
.srcAccessMask = vk::AccessFlagBits::eMemoryWrite,
.dstAccessMask = vk::AccessFlagBits::eTransferRead,
.oldLayout = source->layout,
.newLayout = vk::ImageLayout::eTransferSrcOptimal,
.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
.subresourceRange = subresource,
});
}
auto submitFunc{[&](vk::Semaphore extraWaitSemaphore){
boost::container::small_vector<vk::Semaphore, 2> waitSemaphores;
if (waitSemaphore)
waitSemaphores.push_back(waitSemaphore);
auto destinationBacking{GetBacking()};
if (layout != vk::ImageLayout::eTransferDstOptimal) {
commandBuffer.pipelineBarrier(layout != vk::ImageLayout::eUndefined ? vk::PipelineStageFlagBits::eTopOfPipe : vk::PipelineStageFlagBits::eBottomOfPipe, vk::PipelineStageFlagBits::eTransfer, {}, {}, {}, vk::ImageMemoryBarrier{
.image = destinationBacking,
.srcAccessMask = vk::AccessFlagBits::eMemoryRead,
.dstAccessMask = vk::AccessFlagBits::eTransferWrite,
.oldLayout = layout,
.newLayout = vk::ImageLayout::eTransferDstOptimal,
.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
.subresourceRange = subresource,
});
if (extraWaitSemaphore)
waitSemaphores.push_back(extraWaitSemaphore);
if (layout == vk::ImageLayout::eUndefined)
layout = vk::ImageLayout::eTransferDstOptimal;
}
return gpu.scheduler.Submit([&](vk::raii::CommandBuffer &commandBuffer) {
auto sourceBacking{source->GetBacking()};
if (source->layout != vk::ImageLayout::eTransferSrcOptimal) {
commandBuffer.pipelineBarrier(vk::PipelineStageFlagBits::eTopOfPipe, vk::PipelineStageFlagBits::eTransfer, {}, {}, {}, vk::ImageMemoryBarrier{
.image = sourceBacking,
.srcAccessMask = vk::AccessFlagBits::eMemoryWrite,
.dstAccessMask = vk::AccessFlagBits::eTransferRead,
.oldLayout = source->layout,
.newLayout = vk::ImageLayout::eTransferSrcOptimal,
.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
.subresourceRange = subresource,
});
}
vk::ImageSubresourceLayers subresourceLayers{
.aspectMask = subresource.aspectMask,
.mipLevel = subresource.baseMipLevel,
.baseArrayLayer = subresource.baseArrayLayer,
.layerCount = subresource.layerCount == VK_REMAINING_ARRAY_LAYERS ? layerCount - subresource.baseArrayLayer : subresource.layerCount,
};
for (; subresourceLayers.mipLevel < (subresource.levelCount == VK_REMAINING_MIP_LEVELS ? levelCount - subresource.baseMipLevel : subresource.levelCount); subresourceLayers.mipLevel++)
commandBuffer.copyImage(sourceBacking, vk::ImageLayout::eTransferSrcOptimal, destinationBacking, vk::ImageLayout::eTransferDstOptimal, vk::ImageCopy{
.srcSubresource = subresourceLayers,
.dstSubresource = subresourceLayers,
.extent = dimensions,
});
auto destinationBacking{GetBacking()};
if (layout != vk::ImageLayout::eTransferDstOptimal) {
commandBuffer.pipelineBarrier(vk::PipelineStageFlagBits::eAllCommands, vk::PipelineStageFlagBits::eAllCommands, {}, {}, {}, vk::ImageMemoryBarrier{
.image = destinationBacking,
.srcAccessMask = vk::AccessFlagBits::eMemoryRead,
.dstAccessMask = vk::AccessFlagBits::eTransferWrite,
.oldLayout = layout,
.newLayout = vk::ImageLayout::eTransferDstOptimal,
.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
.subresourceRange = subresource,
});
if (layout != vk::ImageLayout::eTransferDstOptimal)
commandBuffer.pipelineBarrier(vk::PipelineStageFlagBits::eTransfer, vk::PipelineStageFlagBits::eTransfer, {}, {}, {}, vk::ImageMemoryBarrier{
.image = destinationBacking,
.srcAccessMask = vk::AccessFlagBits::eTransferWrite,
.dstAccessMask = vk::AccessFlagBits::eMemoryRead,
.oldLayout = vk::ImageLayout::eTransferDstOptimal,
.newLayout = layout,
.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
.subresourceRange = subresource,
});
if (layout == vk::ImageLayout::eUndefined)
layout = vk::ImageLayout::eTransferDstOptimal;
}
if (source->layout != vk::ImageLayout::eTransferSrcOptimal)
commandBuffer.pipelineBarrier(vk::PipelineStageFlagBits::eTransfer, vk::PipelineStageFlagBits::eTransfer, {}, {}, {}, vk::ImageMemoryBarrier{
.image = sourceBacking,
.srcAccessMask = vk::AccessFlagBits::eTransferRead,
.dstAccessMask = vk::AccessFlagBits::eMemoryWrite,
.oldLayout = vk::ImageLayout::eTransferSrcOptimal,
.newLayout = source->layout,
.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
.subresourceRange = subresource,
});
})};
lCycle->AttachObjects(std::move(source), shared_from_this());
lCycle->ChainCycle(cycle);
lCycle->ChainCycle(source->cycle);
cycle = lCycle;
vk::ImageSubresourceLayers subresourceLayers{
.aspectMask = subresource.aspectMask,
.mipLevel = subresource.baseMipLevel,
.baseArrayLayer = subresource.baseArrayLayer,
.layerCount = subresource.layerCount == VK_REMAINING_ARRAY_LAYERS ? layerCount - subresource.baseArrayLayer : subresource.layerCount,
};
for (; subresourceLayers.mipLevel < (subresource.levelCount == VK_REMAINING_MIP_LEVELS ? levelCount - subresource.baseMipLevel : subresource.levelCount); subresourceLayers.mipLevel++)
commandBuffer.copyImage(sourceBacking, vk::ImageLayout::eTransferSrcOptimal, destinationBacking, vk::ImageLayout::eTransferDstOptimal, vk::ImageCopy{
.srcSubresource = subresourceLayers,
.dstSubresource = subresourceLayers,
.extent = dimensions,
});
if (layout != vk::ImageLayout::eTransferDstOptimal)
commandBuffer.pipelineBarrier(vk::PipelineStageFlagBits::eAllCommands, vk::PipelineStageFlagBits::eAllCommands, {}, {}, {}, vk::ImageMemoryBarrier{
.image = destinationBacking,
.srcAccessMask = vk::AccessFlagBits::eTransferWrite,
.dstAccessMask = vk::AccessFlagBits::eMemoryRead,
.oldLayout = vk::ImageLayout::eTransferDstOptimal,
.newLayout = layout,
.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
.subresourceRange = subresource,
});
if (source->layout != vk::ImageLayout::eTransferSrcOptimal)
commandBuffer.pipelineBarrier(vk::PipelineStageFlagBits::eAllCommands, vk::PipelineStageFlagBits::eAllCommands, {}, {}, {}, vk::ImageMemoryBarrier{
.image = sourceBacking,
.srcAccessMask = vk::AccessFlagBits::eTransferRead,
.dstAccessMask = vk::AccessFlagBits::eMemoryWrite,
.oldLayout = vk::ImageLayout::eTransferSrcOptimal,
.newLayout = source->layout,
.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
.subresourceRange = subresource,
});
}, waitSemaphores, span<vk::Semaphore>{signalSemaphore});
}};
auto newCycle{[&]{
if (source->cycle)
return source->cycle->RecordSemaphoreWaitUsage(std::move(submitFunc));
else
return submitFunc({});
}()};
newCycle->AttachObjects(std::move(source), shared_from_this());
cycle = newCycle;
}
}