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Enabling activation checkpoint debug makes throughput gradually slow down to crawl. #163923

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Enabling activation checkpoint debug makes throughput gradually slow down to crawl.#163923
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module: activation checkpointingRelated to activation checkpointingneeds reproductionEnsure you have actionable steps to reproduce the issue. Someone else needs to confirm the repro.triagedThis issue has been looked at a team member, and triaged and prioritized into an appropriate module
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githubsgi
opened on Sep 26, 2025

🐛 Describe the bug

Enabling activation checkpoint debug makes throughput gradually slow down to crawl.

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Nightly latest'ish.

cc @soulitzer

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    module: activation checkpointingRelated to activation checkpointingneeds reproductionEnsure you have actionable steps to reproduce the issue. Someone else needs to confirm the repro.triagedThis issue has been looked at a team member, and triaged and prioritized into an appropriate module

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