[DeepseekV3] OOM cascade root-cause investigation (generator ref leak in conversion_mapping) (#48720)
* [DeepseekV3] investigation placeholder: OOM cascade from generator ref leak in conversion_mapping.py
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
* [DeepseekV3] free GPU memory after tests loading real checkpoint to prevent OOM cascade
`test_eager_matches_sdpa_generate` loads two copies of `bzantium/tiny-deepseek-v3`
(~10 GB each). When it OOMs during generation, the models are not freed before the
next test runs, causing a cascade of spurious OOM failures in the suite.
- Wrap the generate loop in try/finally so `del model_eager, model_sdpa` +
`cleanup(gc_collect=True)` always runs, even when the test fails mid-way.
- Add `del model` + `cleanup(gc_collect=True)` at the end of `test_compile_static_cache`.
- Change `DeepseekV3IntegrationTest.tearDown` from `gc_collect=False` to `gc_collect=True`
so reference cycles are broken between integration tests.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
* [DeepseekV3] add inline comments explaining cleanup rationale (see PR #48720)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
* revert integration test changes (will use MemoryCleanupMixin in a follow-up)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
* [DeepseekV3] update stale golden values in test_compile_static_cache
The expected strings went stale due to torch/env drift on CI runners.
The model (bzantium/tiny-deepseek-v3) is untrained so output is
gibberish that changes across environments. Values refreshed from
latest main CI run (2026-09-11). See PR #48720.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
* [DeepseekV3] add TODO on compiled static cache path (never passed since added)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Co-authored-by: ydshieh <ydshieh@users.noreply.github.com>