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graphics: make DispatchDirect asynchronous

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This commit is contained in:
nmzik
2026-08-05 14:49:45 +02:00
parent 9859b3e1d6
commit b2963aa6e0
4 changed files with 60 additions and 20 deletions
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src/graphics/host_gpu/renderer/pipeline/shaderResourceBarrier.cpp
+31
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@@ -36,6 +36,22 @@ VulkanMemoryBarrier MakeShaderWriteDependency() {
return barrier;
}
VulkanMemoryBarrier MakeShaderAccessDependency() {
VulkanMemoryBarrier barrier {};
barrier.sType = vk::StructureType::eMemoryBarrier;
barrier.srcAccessMask = vk::AccessFlagBits::eShaderRead | vk::AccessFlagBits::eShaderWrite;
barrier.dstAccessMask = vk::AccessFlagBits::eMemoryRead | vk::AccessFlagBits::eMemoryWrite;
return barrier;
}
VulkanMemoryBarrier MakeShaderWriteHazardDependency() {
VulkanMemoryBarrier barrier {};
barrier.sType = vk::StructureType::eMemoryBarrier;
barrier.srcAccessMask = vk::AccessFlagBits::eMemoryRead | vk::AccessFlagBits::eMemoryWrite;
barrier.dstAccessMask = vk::AccessFlagBits::eShaderRead | vk::AccessFlagBits::eShaderWrite;
return barrier;
}
vk::BufferMemoryBarrier MakeGdsDependency(vk::Buffer buffer) {
EXIT_IF(buffer == nullptr);
@@ -84,6 +100,21 @@ bool HasShaderBufferWrites(const ShaderStageRuntime& runtime) {
return !CollectShaderBufferWrites(*runtime.program, *runtime.resources).empty();
}
void ShaderAccessBarrier(vk::CommandBuffer vk_buffer, vk::PipelineStageFlags source_stages) {
EXIT_IF(vk_buffer == nullptr || !source_stages);
const auto barrier = MakeShaderAccessDependency();
vk_buffer.pipelineBarrier(source_stages, vk::PipelineStageFlagBits::eAllCommands,
vk::DependencyFlags {}, 1, &barrier, 0, nullptr, 0, nullptr);
}
void ShaderWriteHazardBarrier(vk::CommandBuffer vk_buffer,
vk::PipelineStageFlags destination_stages) {
EXIT_IF(vk_buffer == nullptr || !destination_stages);
const auto barrier = MakeShaderWriteHazardDependency();
vk_buffer.pipelineBarrier(vk::PipelineStageFlagBits::eAllCommands, destination_stages,
vk::DependencyFlags {}, 1, &barrier, 0, nullptr, 0, nullptr);
}
void ShaderWriteBarrier(vk::CommandBuffer vk_buffer, vk::PipelineStageFlags source_stages) {
EXIT_IF(vk_buffer == nullptr || !source_stages);
const auto barrier = MakeShaderWriteDependency();
src/graphics/host_gpu/renderer/pipeline/shaderResourceBarrier.h
+5
View File
@@ -18,12 +18,17 @@ struct ShaderBufferWriteRange {
};
vk::PipelineStageFlags ShaderPipelineStages(vk::ShaderStageFlags stages);
VulkanMemoryBarrier MakeShaderAccessDependency();
VulkanMemoryBarrier MakeShaderWriteHazardDependency();
VulkanMemoryBarrier MakeShaderWriteDependency();
vk::BufferMemoryBarrier MakeGdsDependency(vk::Buffer buffer);
std::vector<ShaderBufferWriteRange>
CollectShaderBufferWrites(const ShaderRecompiler::IR::Program& program,
const ShaderRecompiler::IR::ResourceSnapshot& resources);
bool HasShaderBufferWrites(const ShaderStageRuntime& runtime);
void ShaderAccessBarrier(vk::CommandBuffer vk_buffer, vk::PipelineStageFlags source_stages);
void ShaderWriteHazardBarrier(vk::CommandBuffer vk_buffer,
vk::PipelineStageFlags destination_stages);
void ShaderWriteBarrier(vk::CommandBuffer vk_buffer, vk::PipelineStageFlags source_stages);
} // namespace Libs::Graphics
src/graphics/host_gpu/renderer/renderCompute.cpp
+8 -4
View File
@@ -325,9 +325,6 @@ void RenderExecutor::DispatchDirect(uint64_t submit_id, RenderCommandBuffer& buf
auto vk_buffer = buffer.Handle();
CommitBindings(buffer, vk::PipelineBindPoint::eCompute, pipeline.pipeline_layout, bindings);
vk_buffer.bindPipeline(vk::PipelineBindPoint::eCompute, pipeline.pipeline);
vk_buffer.dispatch(thread_group_x, thread_group_y, thread_group_z);
bool has_storage_writes = HasShaderBufferWrites(input_info.stage);
has_storage_writes =
std::any_of(program.info.images.begin(), program.info.images.end(),
@@ -338,8 +335,15 @@ void RenderExecutor::DispatchDirect(uint64_t submit_id, RenderCommandBuffer& buf
}) ||
has_storage_writes;
if (has_storage_writes) {
ShaderWriteBarrier(vk_buffer, vk::PipelineStageFlagBits::eComputeShader);
// A host fence used to serialize every dispatch. Preserve its read-before-write ordering
// while allowing the queue to execute asynchronously.
ShaderWriteHazardBarrier(vk_buffer, vk::PipelineStageFlagBits::eComputeShader);
}
vk_buffer.bindPipeline(vk::PipelineBindPoint::eCompute, pipeline.pipeline);
vk_buffer.dispatch(thread_group_x, thread_group_y, thread_group_z);
// The removed host fence also ordered read-only dispatches before later writers.
ShaderAccessBarrier(vk_buffer, vk::PipelineStageFlagBits::eComputeShader);
ResetBindings();
}