Added required_subgroup_size to PipelineShaderStageCreateInfo

vulkano-shaders/src/entry_point.rs

@@ -73,7 +73,49 @@ fn write_shader_execution(execution: &ShaderExecution) -> TokenStream {
  )
  }
  }
- ShaderExecution::Compute => quote! { ::vulkano::shader::ShaderExecution::Compute },
+ ShaderExecution::Compute(execution) => {
+ use ::quote::ToTokens;
+ use ::vulkano::shader::{ComputeShaderExecution, LocalSize};
+
+ struct LocalSizeToTokens(LocalSize);
+
+ impl ToTokens for LocalSizeToTokens {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ match self.0 {
+ LocalSize::Literal(literal) => quote! {
+ ::vulkano::shader::LocalSize::Literal(#literal)
+ },
+ LocalSize::SpecId(id) => quote! {
+ ::vulkano::shader::LocalSize::SpecId(#id)
+ },
+ }
+ .to_tokens(tokens);
+ }
+ }
+
+ match execution {
+ ComputeShaderExecution::LocalSize([x, y, z]) => {
+ let [x, y, z] = [
+ LocalSizeToTokens(*x),
+ LocalSizeToTokens(*y),
+ LocalSizeToTokens(*z),
+ ];
+ quote! { ::vulkano::shader::ShaderExecution::Compute(
+ ::vulkano::shader::ComputeShaderExecution::LocalSize([#x, #y, #z])
+ ) }
+ }
+ ComputeShaderExecution::LocalSizeId([x, y, z]) => {
+ let [x, y, z] = [
+ LocalSizeToTokens(*x),
+ LocalSizeToTokens(*y),
+ LocalSizeToTokens(*z),
+ ];
+ quote! { ::vulkano::shader::ShaderExecution::Compute(
+ ::vulkano::shader::ComputeShaderExecution::LocalSizeId([#x, #y, #z])
+ ) }
+ }
+ }
+ }
  ShaderExecution::RayGeneration => {
  quote! { ::vulkano::shader::ShaderExecution::RayGeneration }
  }

vulkano/src/pipeline/compute.rs

@@ -74,11 +74,9 @@ impl ComputePipeline {
  if let Some(cache) = &cache {
  assert_eq!(device, cache.device().as_ref());
  }
-
  create_info
  .validate(device)
  .map_err(|err| err.add_context("create_info"))?;
-
  Ok(())
  }
 
@@ -100,12 +98,14 @@ impl ComputePipeline {
  let specialization_info_vk;
  let specialization_map_entries_vk: Vec<_>;
  let mut specialization_data_vk: Vec<u8>;
+ let required_subgroup_size_create_info;
 
  {
  let &PipelineShaderStageCreateInfo {
  flags,
  ref entry_point,
  ref specialization_info,
+ ref required_subgroup_size,
  _ne: _,
  } = stage;
 
@@ -135,7 +135,20 @@ impl ComputePipeline {
  data_size: specialization_data_vk.len(),
  p_data: specialization_data_vk.as_ptr() as *const _,
  };
+ required_subgroup_size_create_info =
+ required_subgroup_size.map(|required_subgroup_size| {
+ ash::vk::PipelineShaderStageRequiredSubgroupSizeCreateInfo {
+ required_subgroup_size,
+ ..Default::default()
+ }
+ });
  stage_vk = ash::vk::PipelineShaderStageCreateInfo {
+ p_next: required_subgroup_size_create_info.as_ref().map_or(
+ ptr::null(),
+ |required_subgroup_size_create_info| {
+ required_subgroup_size_create_info as *const _ as _
+ },
+ ),
  flags: flags.into(),
  stage: ShaderStage::from(&entry_point_info.execution).into(),
  module: entry_point.module().handle(),
@@ -336,12 +349,13 @@ impl ComputePipelineCreateInfo {
  flags: _,
  ref entry_point,
  specialization_info: _,
+ required_subgroup_size: _vk,
  _ne: _,
  } = &stage;
 
  let entry_point_info = entry_point.info();
 
- if !matches!(entry_point_info.execution, ShaderExecution::Compute) {
+ if !matches!(entry_point_info.execution, ShaderExecution::Compute(_)) {
  return Err(Box::new(ValidationError {
  context: "stage.entry_point".into(),
  problem: "is not a `ShaderStage::Compute` entry point".into(),
@@ -515,4 +529,135 @@ mod tests {
  let data_buffer_content = data_buffer.read().unwrap();
  assert_eq!(*data_buffer_content, 0x12345678);
  }
+
+ #[test]
+ fn required_subgroup_size() {
+ // This test checks whether required_subgroup_size works.
+ // It executes a single compute shader (one invocation) that writes the subgroup size
+ // to a buffer. The buffer content is then checked for the right value.
+
+ let (device, queue) = gfx_dev_and_queue!(subgroup_size_control);
+
+ let cs = unsafe {
+ /*
+ #version 450
+
+ #extension GL_KHR_shader_subgroup_basic: enable
+
+ layout(local_size_x = 128, local_size_y = 1, local_size_z = 1) in;
+
+ layout(set = 0, binding = 0) buffer Output {
+ uint write;
+ } write;
+
+ void main() {
+ if (gl_GlobalInvocationID.x == 0) {
+ write.write = gl_SubgroupSize;
+ }
+ }
+ */
+ const MODULE: [u32; 246] = [
+ 119734787, 65536, 851978, 30, 0, 131089, 1, 131089, 61, 393227, 1, 1280527431,
+ 1685353262, 808793134, 0, 196622, 0, 1, 458767, 5, 4, 1852399981, 0, 9, 23, 393232,
+ 4, 17, 128, 1, 1, 196611, 2, 450, 655364, 1197427783, 1279741775, 1885560645,
+ 1953718128, 1600482425, 1701734764, 1919509599, 1769235301, 25974, 524292,
+ 1197427783, 1279741775, 1852399429, 1685417059, 1768185701, 1952671090, 6649449,
+ 589828, 1264536647, 1935626824, 1701077352, 1970495346, 1869768546, 1650421877,
+ 1667855201, 0, 262149, 4, 1852399981, 0, 524293, 9, 1197436007, 1633841004,
+ 1986939244, 1952539503, 1231974249, 68, 262149, 18, 1886680399, 29813, 327686, 18,
+ 0, 1953067639, 101, 262149, 20, 1953067639, 101, 393221, 23, 1398762599,
+ 1919378037, 1399879023, 6650473, 262215, 9, 11, 28, 327752, 18, 0, 35, 0, 196679,
+ 18, 3, 262215, 20, 34, 0, 262215, 20, 33, 0, 196679, 23, 0, 262215, 23, 11, 36,
+ 196679, 24, 0, 262215, 29, 11, 25, 131091, 2, 196641, 3, 2, 262165, 6, 32, 0,
+ 262167, 7, 6, 3, 262176, 8, 1, 7, 262203, 8, 9, 1, 262187, 6, 10, 0, 262176, 11, 1,
+ 6, 131092, 14, 196638, 18, 6, 262176, 19, 2, 18, 262203, 19, 20, 2, 262165, 21, 32,
+ 1, 262187, 21, 22, 0, 262203, 11, 23, 1, 262176, 25, 2, 6, 262187, 6, 27, 128,
+ 262187, 6, 28, 1, 393260, 7, 29, 27, 28, 28, 327734, 2, 4, 0, 3, 131320, 5, 327745,
+ 11, 12, 9, 10, 262205, 6, 13, 12, 327850, 14, 15, 13, 10, 196855, 17, 0, 262394,
+ 15, 16, 17, 131320, 16, 262205, 6, 24, 23, 327745, 25, 26, 20, 22, 196670, 26, 24,
+ 131321, 17, 131320, 17, 65789, 65592,
+ ];
+ let module =
+ ShaderModule::new(device.clone(), ShaderModuleCreateInfo::new(&MODULE)).unwrap();
+ module.entry_point("main").unwrap()
+ };
+
+ let properties = device.physical_device().properties();
+ let subgroup_size = properties.min_subgroup_size.unwrap_or(1);
+
+ let pipeline = {
+ let stage = PipelineShaderStageCreateInfo {
+ required_subgroup_size: Some(subgroup_size),
+ ..PipelineShaderStageCreateInfo::new(cs)
+ };
+ let layout = PipelineLayout::new(
+ device.clone(),
+ PipelineDescriptorSetLayoutCreateInfo::from_stages([&stage])
+ .into_pipeline_layout_create_info(device.clone())
+ .unwrap(),
+ )
+ .unwrap();
+ ComputePipeline::new(
+ device.clone(),
+ None,
+ ComputePipelineCreateInfo::stage_layout(stage, layout),
+ )
+ .unwrap()
+ };
+
+ let memory_allocator = StandardMemoryAllocator::new_default(device.clone());
+ let data_buffer = Buffer::from_data(
+ &memory_allocator,
+ BufferCreateInfo {
+ usage: BufferUsage::STORAGE_BUFFER,
+ ..Default::default()
+ },
+ AllocationCreateInfo {
+ memory_type_filter: MemoryTypeFilter::PREFER_DEVICE
+ | MemoryTypeFilter::HOST_RANDOM_ACCESS,
+ ..Default::default()
+ },
+ 0,
+ )
+ .unwrap();
+
+ let ds_allocator = StandardDescriptorSetAllocator::new(device.clone());
+ let set = PersistentDescriptorSet::new(
+ &ds_allocator,
+ pipeline.layout().set_layouts().get(0).unwrap().clone(),
+ [WriteDescriptorSet::buffer(0, data_buffer.clone())],
+ [],
+ )
+ .unwrap();
+
+ let cb_allocator = StandardCommandBufferAllocator::new(device.clone(), Default::default());
+ let mut cbb = AutoCommandBufferBuilder::primary(
+ &cb_allocator,
+ queue.queue_family_index(),
+ CommandBufferUsage::OneTimeSubmit,
+ )
+ .unwrap();
+ cbb.bind_pipeline_compute(pipeline.clone())
+ .unwrap()
+ .bind_descriptor_sets(
+ PipelineBindPoint::Compute,
+ pipeline.layout().clone(),
+ 0,
+ set,
+ )
+ .unwrap()
+ .dispatch([128, 1, 1])
+ .unwrap();
+ let cb = cbb.build().unwrap();
+
+ let future = now(device)
+ .then_execute(queue, cb)
+ .unwrap()
+ .then_signal_fence_and_flush()
+ .unwrap();
+ future.wait(None).unwrap();
+
+ let data_buffer_content = data_buffer.read().unwrap();
+ assert_eq!(*data_buffer_content, subgroup_size);
+ }
 }

vulkano/src/pipeline/graphics/mod.rs

@@ -167,7 +167,6 @@ impl GraphicsPipeline {
  create_info
  .validate(device)
  .map_err(|err| err.add_context("create_info"))?;
-
  Ok(())
  }
 
@@ -204,6 +203,8 @@ impl GraphicsPipeline {
  specialization_info_vk: ash::vk::SpecializationInfo,
  specialization_map_entries_vk: Vec<ash::vk::SpecializationMapEntry>,
  specialization_data_vk: Vec<u8>,
+ required_subgroup_size_create_info:
+ Option<ash::vk::PipelineShaderStageRequiredSubgroupSizeCreateInfo>,
  }
 
  let (mut stages_vk, mut per_stage_vk): (SmallVec<[_; 5]>, SmallVec<[_; 5]>) = stages
@@ -213,6 +214,7 @@ impl GraphicsPipeline {
  flags,
  ref entry_point,
  ref specialization_info,
+ ref required_subgroup_size,
  _ne: _,
  } = stage;
 
@@ -235,7 +237,13 @@ impl GraphicsPipeline {
  }
  })
  .collect();
-
+ let required_subgroup_size_create_info =
+ required_subgroup_size.map(|required_subgroup_size| {
+ ash::vk::PipelineShaderStageRequiredSubgroupSizeCreateInfo {
+ required_subgroup_size,
+ ..Default::default()
+ }
+ });
  (
  ash::vk::PipelineShaderStageCreateInfo {
  flags: flags.into(),
@@ -255,6 +263,7 @@ impl GraphicsPipeline {
  },
  specialization_map_entries_vk,
  specialization_data_vk,
+ required_subgroup_size_create_info,
  },
  )
  })
@@ -267,10 +276,17 @@ impl GraphicsPipeline {
  specialization_info_vk,
  specialization_map_entries_vk,
  specialization_data_vk,
+ required_subgroup_size_create_info,
  },
  ) in (stages_vk.iter_mut()).zip(per_stage_vk.iter_mut())
  {
  *stage_vk = ash::vk::PipelineShaderStageCreateInfo {
+ p_next: required_subgroup_size_create_info.as_ref().map_or(
+ ptr::null(),
+ |required_subgroup_size_create_info| {
+ required_subgroup_size_create_info as *const _ as _
+ },
+ ),
  p_name: name_vk.as_ptr(),
  p_specialization_info: specialization_info_vk,
  ..*stage_vk
@@ -2423,6 +2439,7 @@ impl GraphicsPipelineCreateInfo {
  flags: _,
  ref entry_point,
  specialization_info: _,
+ required_subgroup_size: _vk,
  _ne: _,
  } = stage;