mirror of
https://github.com/skyline-emu/skyline.git
synced 2024-11-26 04:54:17 +01:00
Use semaphores for presentation engine frame synchronisation
Avoids waits on the CPU which can be costly and confuse the scheduler, also reduces latency significantly.
This commit is contained in:
Billy Laws
parent
0670e0e0dc
commit
1a0819fb76
@ -24,7 +24,8 @@ namespace skyline::gpu {
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PresentationEngine::PresentationEngine(const DeviceState &state, GPU &gpu)
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: state{state},
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gpu{gpu},
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acquireFence{gpu.vkDevice, vk::FenceCreateInfo{}},
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presentSemaphores{util::MakeFilledArray<vk::raii::Semaphore, MaxSwapchainImageCount>(gpu.vkDevice, vk::SemaphoreCreateInfo{})},
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acquireSemaphores{util::MakeFilledArray<vk::raii::Semaphore, MaxSwapchainImageCount>(gpu.vkDevice, vk::SemaphoreCreateInfo{})},
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presentationTrack{static_cast<u64>(trace::TrackIds::Presentation), perfetto::ProcessTrack::Current()},
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vsyncEvent{std::make_shared<kernel::type::KEvent>(state, true)},
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choreographerThread{&PresentationEngine::ChoreographerThread, this},
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@ -116,35 +117,31 @@ namespace skyline::gpu {
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windowScalingMode = frame.scalingMode;
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}
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if (frame.transform != windowTransform) {
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if ((result = window->perform(window, NATIVE_WINDOW_SET_BUFFERS_TRANSFORM, static_cast<i32>(frame.transform))))
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throw exception("Setting the buffer transform to '{}' failed with {}", ToString(frame.transform), result);
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windowTransform = frame.transform;
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}
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if ((result = window->perform(window, NATIVE_WINDOW_SET_BUFFERS_TRANSFORM, static_cast<i32>(frame.transform))))
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throw exception("Setting the buffer transform to '{}' failed with {}", ToString(frame.transform), result);
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windowTransform = frame.transform;
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gpu.vkDevice.resetFences(*acquireFence);
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auto &acquireSemaphore{acquireSemaphores[acquireSemaphoreIndex]};
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acquireSemaphoreIndex = (acquireSemaphoreIndex + 1) % swapchainImageCount;
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std::pair<vk::Result, u32> nextImage;
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while (nextImage = vkSwapchain->acquireNextImage(std::numeric_limits<u64>::max(), {}, *acquireFence), nextImage.first != vk::Result::eSuccess) [[unlikely]] {
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while (nextImage = vkSwapchain->acquireNextImage(std::numeric_limits<u64>::max(), *acquireSemaphore, {}), nextImage.first != vk::Result::eSuccess) [[unlikely]] {
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if (nextImage.first == vk::Result::eSuboptimalKHR)
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surfaceCondition.wait(lock, [this]() { return vkSurface.has_value(); });
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else
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throw exception("vkAcquireNextImageKHR returned an unhandled result '{}'", vk::to_string(nextImage.first));
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}
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auto &nextImageTexture{images.at(nextImage.second)};
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std::ignore = gpu.vkDevice.waitForFences(*acquireFence, true, std::numeric_limits<u64>::max());
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auto &nextImageTexture{images.at(nextImage.second)};
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auto &presentSemaphore{presentSemaphores[nextImage.second]};
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texture->SynchronizeHost();
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nextImageTexture->CopyFrom(texture, vk::ImageSubresourceRange{
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nextImageTexture->CopyFrom(texture, *acquireSemaphore, *presentSemaphore, vk::ImageSubresourceRange{
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.aspectMask = vk::ImageAspectFlagBits::eColor,
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.levelCount = 1,
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.layerCount = 1,
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});
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// Wait on the copy to the swapchain image to complete before submitting for presentation
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nextImageTexture->WaitOnFence();
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auto getMonotonicNsNow{[]() -> i64 {
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timespec time;
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if (clock_gettime(CLOCK_MONOTONIC, &time))
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@ -194,6 +191,8 @@ namespace skyline::gpu {
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.swapchainCount = 1,
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.pSwapchains = &**vkSwapchain,
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.pImageIndices = &nextImage.second,
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.waitSemaphoreCount = 1,
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.pWaitSemaphores = &*presentSemaphore,
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}); // We don't care about suboptimal images as they are caused by not respecting the transform hint, we handle transformations externally
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}
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@ -328,6 +327,7 @@ namespace skyline::gpu {
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swapchainFormat = format;
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swapchainExtent = extent;
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swapchainImageCount = vkImages.size();
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}
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void PresentationEngine::UpdateSurface(jobject newSurface) {
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@ -35,12 +35,15 @@ namespace skyline::gpu {
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vk::SurfaceCapabilitiesKHR vkSurfaceCapabilities{}; //!< The capabilities of the current Vulkan Surface
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std::optional<vk::raii::SwapchainKHR> vkSwapchain; //!< The Vulkan swapchain and the properties associated with it
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vk::raii::Fence acquireFence; //!< A fence for acquiring an image from the swapchain
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texture::Format swapchainFormat{}; //!< The image format of the textures in the current swapchain
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texture::Dimensions swapchainExtent{}; //!< The extent of images in the current swapchain
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static constexpr size_t MaxSwapchainImageCount{6}; //!< The maximum amount of swapchain textures, this affects the amount of images that can be in the swapchain
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std::array<std::shared_ptr<Texture>, MaxSwapchainImageCount> images; //!< All the swapchain textures in the same order as supplied by the host swapchain
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std::array<vk::raii::Semaphore, MaxSwapchainImageCount> presentSemaphores; //!< Array of semaphores used to signal that swapchain images are ready to be completed, indexed by Vulkan swapchain index
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std::array<vk::raii::Semaphore, MaxSwapchainImageCount> acquireSemaphores; //!< Array of semaphores used to wait on the GPU for swapchain images to be acquired, indexed by `acquireSemaphoreIndex`
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size_t acquireSemaphoreIndex{}; //!< The index of the next semaphore to be used for acquiring swapchain images
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size_t swapchainImageCount{}; //!< The number of images in the current swapchain
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i64 frameTimestamp{}; //!< The timestamp of the last frame being shown in nanoseconds
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i64 averageFrametimeNs{}; //!< The average time between frames in nanoseconds
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@ -839,14 +839,16 @@ namespace skyline::gpu {
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return std::make_shared<TextureView>(shared_from_this(), type, range, pFormat, mapping);
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}
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void Texture::CopyFrom(std::shared_ptr<Texture> source, const vk::ImageSubresourceRange &subresource) {
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WaitOnBacking();
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source->WaitOnBacking();
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void Texture::CopyFrom(std::shared_ptr<Texture> source, vk::Semaphore waitSemaphore, vk::Semaphore signalSemaphore, const vk::ImageSubresourceRange &subresource) {
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if (cycle)
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cycle->WaitSubmit();
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if (source->cycle)
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source->cycle->WaitSubmit();
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WaitOnBacking();
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source->WaitOnBacking();
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WaitOnFence();
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if (source->layout == vk::ImageLayout::eUndefined)
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throw exception("Cannot copy from image with undefined layout");
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else if (source->dimensions != dimensions)
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@ -854,78 +856,92 @@ namespace skyline::gpu {
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TRACE_EVENT("gpu", "Texture::CopyFrom");
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auto lCycle{gpu.scheduler.Submit([&](vk::raii::CommandBuffer &commandBuffer) {
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auto sourceBacking{source->GetBacking()};
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if (source->layout != vk::ImageLayout::eTransferSrcOptimal) {
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commandBuffer.pipelineBarrier(vk::PipelineStageFlagBits::eTopOfPipe, vk::PipelineStageFlagBits::eTransfer, {}, {}, {}, vk::ImageMemoryBarrier{
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.image = sourceBacking,
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.srcAccessMask = vk::AccessFlagBits::eMemoryWrite,
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.dstAccessMask = vk::AccessFlagBits::eTransferRead,
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.oldLayout = source->layout,
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.newLayout = vk::ImageLayout::eTransferSrcOptimal,
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.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
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.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
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.subresourceRange = subresource,
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});
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}
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auto submitFunc{[&](vk::Semaphore extraWaitSemaphore){
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boost::container::small_vector<vk::Semaphore, 2> waitSemaphores;
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if (waitSemaphore)
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waitSemaphores.push_back(waitSemaphore);
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auto destinationBacking{GetBacking()};
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if (layout != vk::ImageLayout::eTransferDstOptimal) {
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commandBuffer.pipelineBarrier(layout != vk::ImageLayout::eUndefined ? vk::PipelineStageFlagBits::eTopOfPipe : vk::PipelineStageFlagBits::eBottomOfPipe, vk::PipelineStageFlagBits::eTransfer, {}, {}, {}, vk::ImageMemoryBarrier{
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.image = destinationBacking,
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.srcAccessMask = vk::AccessFlagBits::eMemoryRead,
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.dstAccessMask = vk::AccessFlagBits::eTransferWrite,
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.oldLayout = layout,
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.newLayout = vk::ImageLayout::eTransferDstOptimal,
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.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
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.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
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.subresourceRange = subresource,
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});
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if (extraWaitSemaphore)
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waitSemaphores.push_back(extraWaitSemaphore);
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if (layout == vk::ImageLayout::eUndefined)
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layout = vk::ImageLayout::eTransferDstOptimal;
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}
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return gpu.scheduler.Submit([&](vk::raii::CommandBuffer &commandBuffer) {
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auto sourceBacking{source->GetBacking()};
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if (source->layout != vk::ImageLayout::eTransferSrcOptimal) {
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commandBuffer.pipelineBarrier(vk::PipelineStageFlagBits::eTopOfPipe, vk::PipelineStageFlagBits::eTransfer, {}, {}, {}, vk::ImageMemoryBarrier{
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.image = sourceBacking,
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.srcAccessMask = vk::AccessFlagBits::eMemoryWrite,
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.dstAccessMask = vk::AccessFlagBits::eTransferRead,
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.oldLayout = source->layout,
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.newLayout = vk::ImageLayout::eTransferSrcOptimal,
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.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
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.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
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.subresourceRange = subresource,
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});
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}
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vk::ImageSubresourceLayers subresourceLayers{
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.aspectMask = subresource.aspectMask,
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.mipLevel = subresource.baseMipLevel,
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.baseArrayLayer = subresource.baseArrayLayer,
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.layerCount = subresource.layerCount == VK_REMAINING_ARRAY_LAYERS ? layerCount - subresource.baseArrayLayer : subresource.layerCount,
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};
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for (; subresourceLayers.mipLevel < (subresource.levelCount == VK_REMAINING_MIP_LEVELS ? levelCount - subresource.baseMipLevel : subresource.levelCount); subresourceLayers.mipLevel++)
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commandBuffer.copyImage(sourceBacking, vk::ImageLayout::eTransferSrcOptimal, destinationBacking, vk::ImageLayout::eTransferDstOptimal, vk::ImageCopy{
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.srcSubresource = subresourceLayers,
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.dstSubresource = subresourceLayers,
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.extent = dimensions,
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});
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auto destinationBacking{GetBacking()};
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if (layout != vk::ImageLayout::eTransferDstOptimal) {
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commandBuffer.pipelineBarrier(vk::PipelineStageFlagBits::eAllCommands, vk::PipelineStageFlagBits::eAllCommands, {}, {}, {}, vk::ImageMemoryBarrier{
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.image = destinationBacking,
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.srcAccessMask = vk::AccessFlagBits::eMemoryRead,
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.dstAccessMask = vk::AccessFlagBits::eTransferWrite,
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.oldLayout = layout,
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.newLayout = vk::ImageLayout::eTransferDstOptimal,
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.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
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.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
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.subresourceRange = subresource,
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});
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if (layout != vk::ImageLayout::eTransferDstOptimal)
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commandBuffer.pipelineBarrier(vk::PipelineStageFlagBits::eTransfer, vk::PipelineStageFlagBits::eTransfer, {}, {}, {}, vk::ImageMemoryBarrier{
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.image = destinationBacking,
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.srcAccessMask = vk::AccessFlagBits::eTransferWrite,
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.dstAccessMask = vk::AccessFlagBits::eMemoryRead,
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.oldLayout = vk::ImageLayout::eTransferDstOptimal,
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.newLayout = layout,
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.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
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.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
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.subresourceRange = subresource,
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});
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if (layout == vk::ImageLayout::eUndefined)
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layout = vk::ImageLayout::eTransferDstOptimal;
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}
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if (source->layout != vk::ImageLayout::eTransferSrcOptimal)
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commandBuffer.pipelineBarrier(vk::PipelineStageFlagBits::eTransfer, vk::PipelineStageFlagBits::eTransfer, {}, {}, {}, vk::ImageMemoryBarrier{
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.image = sourceBacking,
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.srcAccessMask = vk::AccessFlagBits::eTransferRead,
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.dstAccessMask = vk::AccessFlagBits::eMemoryWrite,
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.oldLayout = vk::ImageLayout::eTransferSrcOptimal,
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.newLayout = source->layout,
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.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
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.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
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.subresourceRange = subresource,
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});
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})};
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lCycle->AttachObjects(std::move(source), shared_from_this());
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lCycle->ChainCycle(cycle);
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lCycle->ChainCycle(source->cycle);
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cycle = lCycle;
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vk::ImageSubresourceLayers subresourceLayers{
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.aspectMask = subresource.aspectMask,
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.mipLevel = subresource.baseMipLevel,
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.baseArrayLayer = subresource.baseArrayLayer,
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.layerCount = subresource.layerCount == VK_REMAINING_ARRAY_LAYERS ? layerCount - subresource.baseArrayLayer : subresource.layerCount,
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};
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for (; subresourceLayers.mipLevel < (subresource.levelCount == VK_REMAINING_MIP_LEVELS ? levelCount - subresource.baseMipLevel : subresource.levelCount); subresourceLayers.mipLevel++)
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commandBuffer.copyImage(sourceBacking, vk::ImageLayout::eTransferSrcOptimal, destinationBacking, vk::ImageLayout::eTransferDstOptimal, vk::ImageCopy{
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.srcSubresource = subresourceLayers,
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.dstSubresource = subresourceLayers,
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.extent = dimensions,
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});
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if (layout != vk::ImageLayout::eTransferDstOptimal)
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commandBuffer.pipelineBarrier(vk::PipelineStageFlagBits::eAllCommands, vk::PipelineStageFlagBits::eAllCommands, {}, {}, {}, vk::ImageMemoryBarrier{
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.image = destinationBacking,
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.srcAccessMask = vk::AccessFlagBits::eTransferWrite,
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.dstAccessMask = vk::AccessFlagBits::eMemoryRead,
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.oldLayout = vk::ImageLayout::eTransferDstOptimal,
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.newLayout = layout,
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.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
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.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
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.subresourceRange = subresource,
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});
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if (source->layout != vk::ImageLayout::eTransferSrcOptimal)
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commandBuffer.pipelineBarrier(vk::PipelineStageFlagBits::eAllCommands, vk::PipelineStageFlagBits::eAllCommands, {}, {}, {}, vk::ImageMemoryBarrier{
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.image = sourceBacking,
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.srcAccessMask = vk::AccessFlagBits::eTransferRead,
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.dstAccessMask = vk::AccessFlagBits::eMemoryWrite,
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.oldLayout = vk::ImageLayout::eTransferSrcOptimal,
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.newLayout = source->layout,
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.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
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.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
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.subresourceRange = subresource,
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});
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}, waitSemaphores, span<vk::Semaphore>{signalSemaphore});
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}};
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auto newCycle{[&]{
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if (source->cycle)
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return source->cycle->RecordSemaphoreWaitUsage(std::move(submitFunc));
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else
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return submitFunc({});
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}()};
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newCycle->AttachObjects(std::move(source), shared_from_this());
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cycle = newCycle;
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}
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}
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@ -559,7 +559,7 @@ namespace skyline::gpu {
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/**
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* @brief Copies the contents of the supplied source texture into the current texture
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*/
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void CopyFrom(std::shared_ptr<Texture> source, const vk::ImageSubresourceRange &subresource = vk::ImageSubresourceRange{
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void CopyFrom(std::shared_ptr<Texture> source, vk::Semaphore waitSemaphore, vk::Semaphore signalSemaphore, const vk::ImageSubresourceRange &subresource = vk::ImageSubresourceRange{
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.aspectMask = vk::ImageAspectFlagBits::eColor,
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.levelCount = VK_REMAINING_MIP_LEVELS,
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.layerCount = VK_REMAINING_ARRAY_LAYERS,
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