Fusion wgpu compilation cache #1069
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Codecov ReportAttention:
Additional details and impacted files@@ Coverage Diff @@
## main #1069 /- ##
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Coverage 85.55% 85.66% 0.11%
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Files 508 509 1
Lines 53910 54126 216
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Hits 46122 46368 246
Misses 7788 7758 -30 ☔ View full report in Codecov by Sentry. |
louisfd
requested changes
Dec 15, 2023
burn-wgpu/src/codegen/kernel.rs
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| impl ElemWiseKernelCodegen<CompilationPhase> { | ||
| /// Compile the kernel into a [compute shader](ComputeShader). | ||
| pub fn compile(self) -> ComputeShader { | ||
| let mut inputs = Vec::with_capacity(self.input_bindings.len()); |
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inputs and outpus can be directly self.input_bindings and self.output_bindings
burn-wgpu/src/codegen/shader.rs
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| pub enum Visibility { | ||
| Read, | ||
| ReadWrite, | ||
| } | ||
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| #[derive(Debug, Clone, Hash, PartialEq, Eq, Copy)] | ||
| #[derive(Debug, Clone, PartialEq, Eq, Copy)] | ||
| pub enum Elem { | ||
| F32, | ||
| #[allow(dead_code)] |
burn-wgpu/src/fusion/cache.rs
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| items: HashSet<String>, | ||
| } | ||
|
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| pub enum CachedComputeShader { |
burn-wgpu/src/fusion/cache.rs
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| fn source(&self) -> SourceTemplate { | ||
| match self { | ||
| CachedComputeShader::Cached(_) => { | ||
| panic!("NoSource compute shader should only be used by a higher level cache.") |
| inputs, | ||
| outputs, | ||
| locals, | ||
| operators: self.operators.clone(), | ||
| scalars_f32: self.scalars_f32, | ||
| device: self.device.clone(), | ||
| cache: KernelCache::default(), |
| @@ -1,21 0,0 @@ | |||
| @group(0) | |||
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Don't forget to delete safe tanh file
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Changes
Add a cache step where the compilation of fused kernels are only executed once, then the kernel ID is used without any overhead.
Refactor the way we create kernels with fusion into a DSL so that we can use it to create WGSL shaders easily, not just when using fusion. I migrated the unary kernels to use the new way, but following PRs will migrate more kernels and remove a lot of code.
Drop
I removed the clamp max and min functions in Fusion as well as in WGPU, since we need to reduce the number of operations that can be fused to their basic operations. Long story short, they will be fused, so we don't need specific kernels, and having those functions will actually break the fusing stream, so they actually hurt performance as well as add complexity.