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* feat: Add cactus QAT scheme support * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * test(qat): add tests for cactus QAT scheme and fix missing import * Fix cactus QAT scheme: correct MappingType import, tighten PerGroup filter - Drop the broken `from torchao.dtypes import MappingType` import. `MappingType` lives in `torchao.quantization` (and `torchao.quantization.quant_primitives`); it is not exported from `torchao.dtypes` in any supported torchao release (verified on 0.14, 0.16, 0.17). The previous code raised `ImportError` on every cactus call and was masked as a misleading 'torchao not found' error. - Since `IntxWeightOnlyConfig` already defaults `mapping_type` to `MappingType.SYMMETRIC`, drop the explicit kwarg entirely and remove the import. Behavior is unchanged. - Introduce a named `group_size = 32` constant (matches the int4 / fp8-int4 pattern in the surrounding branches) and add a `% group_size == 0` divisibility guard to the filter. `PerGroup(32)` requires `in_features % 32 == 0` at `quantize_()` time, otherwise torchao raises `ValueError: in_features (N) % group_size (32) must be == 0`. The old `in_features >= 32` filter would admit non-aligned widths (e.g. 33, 48, 65, 127) and crash `_prepare_model_for_qat` for those shapes. * Warn when cactus QAT skips non-divisible Linear layers Multiple reviewers flagged that the divisibility guard added in the previous commit can silently leave Linear layers in full precision when their in_features is not a multiple of 32. For currently supported Unsloth models (Qwen, Llama, Gemma, Mistral, Phi) every Linear width is already a multiple of 32/64/128 so this never triggers, but surfacing the coverage gap is cheap and avoids users assuming 100% QAT coverage when they bring a custom model with unusual shapes. Emit a UserWarning listing up to the first 8 skipped layers whenever the cactus filter excludes any Linear due to the modulo guard. This keeps the lenient silent-skip behavior (consistent with int4 / fp8-int4), but stops making it silent. --------- Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com> Co-authored-by: Daniel Han <danielhanchen@gmail.com> |
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| .. | ||
| python | ||
| qlora | ||
| saving | ||
| sh | ||
| studio/install | ||
| utils | ||
| __init__.py | ||
| run_all.sh | ||
| test_cli_export_unpacking.py | ||
| test_get_model_name.py | ||
| test_loader_glob_skip.py | ||
| test_model_registry.py | ||
| test_raw_text.py | ||