[ET-VK][testing] Add per-shader timing breakdown to benchmark output#17259
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[ET-VK][testing] Add per-shader timing breakdown to benchmark output#17259
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… per-shader timing Pull Request resolved: #17105 This change improves the benchmark test harness in three ways: 1. **Reference computation caching**: Test cases are now grouped by a `ReferenceKey` that captures the inputs affecting reference output (sizes, dtype, data generation type). Reference computation runs once per group and results are reused, significantly speeding up test suites with many storage/layout variations of the same logical test case. 2. **Per-shader timing breakdown**: Benchmark output now shows individual shader execution times with global and local workgroup sizes, making it easier to identify performance bottlenecks when multiple shaders participate in an operator. 3. **Deferred data generation**: Tensor data is now generated lazily with explicit seeding, enabling deterministic data sharing across grouped test cases. This ensures identical inputs produce identical reference outputs for caching correctness. Also adds string input support (`ValueSpec::make_string()`) and helper functions for concise test case naming (`layout_abbrev`, `repr_str`, `shape_string`). ghstack-source-id: 338638546 @exported-using-ghexport Differential Revision: [D91945038](https://our.internmc.facebook.com/intern/diff/D91945038/)
🔗 Helpful Links🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/17259
Note: Links to docs will display an error until the docs builds have been completed. ❌ 2 New Failures, 64 PendingAs of commit 6b462fc with merge base 1cffd23 ( NEW FAILURES - The following jobs have failed:
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This PR was created by the merge bot to help merge the original PR into the main branch.
ghstack PR number: #17105 by @SS-JIA
^ Please use this as the source of truth for the PR details, comments, and reviews
ghstack PR base: https://github.com/pytorch/executorch/tree/gh/SS-JIA/398/base
ghstack PR head: https://github.com/pytorch/executorch/tree/gh/SS-JIA/398/head
Merge bot PR base: https://github.com/pytorch/executorch/tree/main
Merge bot PR head: https://github.com/pytorch/executorch/tree/gh/SS-JIA/398/orig
Differential Revision: D91945038
@diff-train-skip-merge