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* Fix repeated base model downloads across checkpoint exports (#6890) Pre-warm the HF hub cache with the 16bit base weights before merge_and_overwrite_lora runs. The merge fetches shards with hf_hub_download(local_dir=...), which never populates the hub cache, so temporary merge directories (GGUF checkpoint exports) forced a full re-download of the base model for every checkpoint. The first export now downloads once into the cache and later exports copy from it. Skips itself when already cached, offline, on Kaggle/Colab, for local or nf4/fp4 bases, non-downloading save methods, or low disk. Opt out with UNSLOTH_PREWARM_HUB_CACHE=0. * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * Show MB for small base models in the pre-warm download message * Harden pre-warm: getattr for model config, abspath for relative HF_HUB_CACHE - Read config._name_or_path via getattr so a model without a config skips cleanly instead of taking the outer error path. - abspath the cache probe so a relative HF_HUB_CACHE walks up to a real root rather than "", which would zero the free-space check and skip pre-warm. Both from PR review; each covered by a test that fails without the fix. * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * Pre-warm the live-env HF cache so runtime redirects still hit (#6890) Resolve the hub cache the same way the merge does (unsloth_zoo _active_caches, live env) instead of huggingface_hub's import-time-frozen constants.HF_HUB_CACHE, and pass it as cache_dir to the cached probe, disk check and snapshot_download. Without this, a runtime HF_HOME/HF_HUB_CACHE redirect (unsloth_zoo redirect_hf_cache_if_readonly on a read-only default cache, or Studio) makes the pre-warm populate a different directory than the one the merge reads, so the cache-copy fast path misses and the base re-downloads on every export anyway. Adds 3 regression tests covering the cache_dir threading and the redirect case. * Apply ruff-format kwarg spacing to the pre-warm cache-dir changes * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * Pre-warm the 16bit sibling for FP8 bases so their merged_16bit exports reuse the cache too For a merged_16bit export of an FP8 base with an existing 16bit sibling, the merge swaps to the sibling and downloads that (unsloth_zoo _resolve_fp8_16bit_sibling), so pre-warming the FP8 repo missed the cache and re-downloaded the sibling every export. Mirror the swap and pre-warm the sibling. No sibling still caches the FP8 repo for the in-place dequant path. Adds 2 regression tests. * Filter pre-warm shards through the safetensors index like the merge does Repos that ship a leftover shard set the index does not reference (e.g. granite-3.2) made the disk gate over-count and snapshot_download fetch shards the merge never reads. Mirror the merge: on the download path, keep only index-referenced shards. Runs after the already-cached check so the cached fast path stays network-free. Adds 2 tests. * Tighten pre-warm comments --------- Co-authored-by: Unsloth <michaelhan@Michaels-MacBook-Pro.local> Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com> Co-authored-by: danielhanchen <danielhanchen@gmail.com> Co-authored-by: Lee Jackson <130007945+Imagineer99@users.noreply.github.com> |
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| .. | ||
| notebooks | ||
| python | ||
| qlora | ||
| saving | ||
| security | ||
| sh | ||
| studio | ||
| studio_setup_ps1 | ||
| utils | ||
| version_compat | ||
| vllm_compat | ||
| __init__.py | ||
| _zoo_aggressive_cuda_spoof.py | ||
| conftest.py | ||
| run_all.sh | ||
| test_attention_implementation.py | ||
| test_attn_impl_honor_explicit.py | ||
| test_callback_signature_drift.py | ||
| test_cli_export_unpacking.py | ||
| test_enforce_kwargs_spacing.py | ||
| test_fast_generate_slow_guard.py | ||
| test_finetune_last_n_layers.py | ||
| test_fp8_tiny_e8m0.py | ||
| test_fused_ce_not_return_dict_logits.py | ||
| test_gemma4_chat_template.py | ||
| test_generate_kwarg_gate.py | ||
| test_get_model_name.py | ||
| test_gradient_checkpointing_restore.py | ||
| test_ignored_tokenizer_casing.py | ||
| test_import_fixes_drift.py | ||
| test_loader_glob_skip.py | ||
| test_missing_torchvision_vlm.py | ||
| test_model_registry.py | ||
| test_moe_lora_targets.py | ||
| test_multi_image_grpo_chunking.py | ||
| test_nvfp4_quant_load.py | ||
| test_offline_loading_helpers.py | ||
| test_offload_embedding_hooks.py | ||
| test_offload_tied_guard.py | ||
| test_peft_tensor_parallel_compat.py | ||
| test_peft_weight_converter_compat.py | ||
| test_prefetch_snapshot_scope.py | ||
| test_pretrain_compile_reset.py | ||
| test_public_api_surface.py | ||
| test_raw_text.py | ||
| test_resolve_model_class.py | ||
| test_studio_install_workspace_guard.py | ||
| test_studio_root_resilience.py | ||
| test_studio_shutdown_thread_wait.py | ||
| test_synthetic_chunk_data.py | ||
| test_tool_mask_zoo_compat.py | ||
| test_uninitialized_position_ids.py | ||
| test_video_path_validation.py | ||
| test_vllm_broken_detection.py | ||
| test_windows_rocm_bnb_version.py | ||