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* version-compat CI: fake CPU training runs for SFT/GRPO/DPO Adds a runtime layer on top of the patch-run canary: actually runs trainer.train() for a couple of steps on a CPU-only runner under the CUDA spoof, wrapping a plain tiny HF model in the Unsloth-patched trainer. Exercises the real train() loop (collation, generation, the injected _get_per_token_logps_and_entropies, loss, backward, optimizer) so a TRL or transformers change that breaks the loop at runtime -- not just the source structure -- surfaces here. No GPU, no meaningful numerics. Needs a chain of small CPU shims (eager torch.compile, dynamo suppress, cuda tensor-alloc redirect to CPU, model.for_training/for_inference equivalents) documented inline. Does not exercise Unsloth's Triton/GPU kernels (CPU can't). * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * cpu fake-train: force adamw_torch + disable dynamo for CPU runner On a real CPU-build torch runner (GitHub CI) two things bit that a CUDA-build torch with GPUs hidden masked locally: - The default optimizer is adamw_8bit (bitsandbytes), whose is_on_gpu() check dies on CPU tensors. Force optim=adamw_torch in all three configs. - import unsloth reinstalls the real torch.compile over the eager passthrough, so the GRPO hot path (chunked_selective_log_softmax) actually compiles and inductor picks the spoofed CUDA device, crashing on device props (gcnArchName). Re-apply the eager passthrough after import and flip torch._dynamo.config.disable so every @torch.compile runs eager at call time. * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * cpu fake-train: write checkpoints under pytest tmp_path Use pytest's tmp_path for each trainer's output_dir instead of a hardcoded relative temp/ci_* path, so a local pytest run does not leave untracked dirs in the repo tree and the tests are CWD-independent. * version-compat CI: disable dynamo at process level for the fake-run job Set TORCHDYNAMO_DISABLE / TORCH_COMPILE_DISABLE in the fake-run step env so dynamo/inductor is off before conftest.py's early import unsloth, not only via the per-test runtime shim. Defense in depth on the GPU-less runner: the GRPO hot path never compiles regardless of when its functions were decorated. --------- Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com> |
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