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[executorch][devtools] Reset profiler state in ETDump tests - #21436

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[executorch][devtools] Reset profiler state in ETDump tests#21436
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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: #21410 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/579/base
ghstack PR head: https://github.com/pytorch/executorch/tree/gh/SS-JIA/579/head
Merge bot PR base: https://github.com/pytorch/executorch/tree/gh/SS-JIA/578/orig
Merge bot PR head: https://github.com/pytorch/executorch/tree/gh/SS-JIA/579/orig
Differential Revision: D113810097
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Pull Request resolved: #21410

Reinitialize the global profiler state before each `ETDumpGenTest` while initializing the runtime once per suite. This prevents profile blocks from leaking across XCTest cases, exhausting the fixed block pool, and causing assertion failures or process crashes. This fixes nine TestInfra signals. This commit was authored with Claude.
ghstack-source-id: 407467887
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Differential Revision: [D113810097](https://our.internmc.facebook.com/intern/diff/D113810097/)
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pytorch-bot Bot commented Jul 28, 2026

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🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/21436

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@meta-cla meta-cla Bot added the CLA Signed This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed. label Jul 28, 2026
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