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Arm backend: Enable planned Ethos-U scratch - #24336
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Reserve scratch during AOT flow instead of allocating it at runtime. This is done through DelegateScratchSpec using the label "ethosu_scratch", and it's enabled by setting plan_delegate_scratch=True or by setting --plan-delegate-scratch in the CLI. The default is False as delegate scratch can only be used on the CoreDriver backend. If a PTE that includes planned delegated scratch is run on the LinuxDriver a warning is issued since the memory will be unused. Legacy PTEs that do not have planned delegate scratch will continue to use the temporary allocator to allocate scratch in the runtime. Authored with AI assistance from OpenAI Codex. Change-Id: I482571a4d7928201f7df48c3440042ed705b4eaf Signed-off-by: Emma Kujala <Emma.Kujala@arm.com>
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🔗 Helpful Links🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/24336
Note: Links to docs will display an error until the docs builds have been completed. ✅ No FailuresAs of commit d374616 with merge base 77b687d ( This comment was automatically generated by Dr. CI and updates every 15 minutes. |
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OK to merge, just make sure buck2 files are updates if needed for the added file (you can ask codex/claude)
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Reserve scratch during AOT flow instead of allocating it at runtime. This is done through DelegateScratchSpec using the label "ethosu_scratch".
cc @digantdesai @freddan80 @per @zingo @oscarandersson8218 @mansnils @Sebastian-Larsson @robell @rascani