Remove config functions like int4_weight_only (#3145)

**Summary:** As a follow-up to #2994,
this commit removes all quantization functions that were used
as configs. These functions were deprecated in 0.14.0 and will
be removed in the next release, 0.15.0.

**Test Plan:** CI

Author: andrewor14

README.md

@@ -243,7 +243,7 @@ Our framework makes it straightforward to add tensor parallel support to your cu
 
 We've added support for authoring and releasing [custom ops](./torchao/csrc/) that do not graph break with `torch.compile()`. We have a few examples you can follow
 
-1. [fp6](torchao/dtypes/floatx/README.md) for 2x faster inference over fp16 with an easy to use API `quantize_(model, fpx_weight_only(3, 2))`
+1. [fp6](torchao/dtypes/floatx/README.md) for 2x faster inference over fp16 with an easy to use API `quantize_(model, FPXWeightOnlyConfig(3, 2))`
 2. [2:4 Sparse Marlin GEMM](https://github.com/pytorch/ao/pull/733) 2x speedups for FP16xINT4 kernels even at batch sizes up to 256
 3. [int4 tinygemm unpacker](https://github.com/pytorch/ao/pull/415) which makes it easier to switch quantized backends for inference
 

test/quantization/test_quant_api.py

@@ -792,38 +792,28 @@ def test_int4wo_cuda_serialization(self):
 
     def test_config_deprecation(self):
         """
-        Test that old config functions like `int4_weight_only` trigger deprecation warnings.
+        Test that old config functions like `Int8DynamicActivationInt4WeightConfig` trigger deprecation warnings.
         """
         from torchao.quantization import (
-            float8_dynamic_activation_float8_weight,
-            float8_static_activation_float8_weight,
-            float8_weight_only,
-            fpx_weight_only,
-            gemlite_uintx_weight_only,
-            int4_dynamic_activation_int4_weight,
-            int4_weight_only,
-            int8_dynamic_activation_int4_weight,
-            int8_dynamic_activation_int8_weight,
-            int8_weight_only,
-            uintx_weight_only,
+            Float8StaticActivationFloat8WeightConfig,
+            FPXWeightOnlyConfig,
+            GemliteUIntXWeightOnlyConfig,
+            Int4DynamicActivationInt4WeightConfig,
+            Int8DynamicActivationInt4WeightConfig,
+            UIntXWeightOnlyConfig,
         )
 
         # Reset deprecation warning state, otherwise we won't log warnings here
         warnings.resetwarnings()
 
         # Map from deprecated API to the args needed to instantiate it
         deprecated_apis_to_args = {
-            float8_dynamic_activation_float8_weight: (),
-            float8_static_activation_float8_weight: (torch.randn(3)),
-            float8_weight_only: (),
-            fpx_weight_only: (3, 2),
-            gemlite_uintx_weight_only: (),
-            int4_dynamic_activation_int4_weight: (),
-            int4_weight_only: (),
-            int8_dynamic_activation_int4_weight: (),
-            int8_dynamic_activation_int8_weight: (),
-            int8_weight_only: (),
-            uintx_weight_only: (torch.uint4,),
+            Float8StaticActivationFloat8WeightConfig: (torch.randn(3),),
+            FPXWeightOnlyConfig: (3, 2),
+            GemliteUIntXWeightOnlyConfig: (),
+            Int4DynamicActivationInt4WeightConfig: (),
+            Int8DynamicActivationInt4WeightConfig: (),
+            UIntXWeightOnlyConfig: (torch.uint4,),
         }
 
         # Call each deprecated API twice
@@ -832,19 +822,16 @@ def test_config_deprecation(self):
                 cls(*args)
                 cls(*args)
 
-                # Each call should have at least one warning.
-                # Some of them can have two warnings - one for deprecation,
-                # one for moving to prototype
-                # 1 warning - just deprecation
-                # 2 warnings - deprecation and prototype warnings
-                self.assertTrue(len(_warnings) in (1, 2))
+                self.assertTrue(len(_warnings) == 1)
                 found_deprecated = False
                 for w in _warnings:
-                    if "is deprecated and will be removed in a future release" in str(
+                    if "will be moving to prototype in a future release" in str(
                         w.message
                     ):
                         found_deprecated = True
-                    self.assertTrue(found_deprecated)
+                    self.assertTrue(
+                        found_deprecated, f"did not find deprecated warning for {cls}"
+                    )
 
 
 common_utils.instantiate_parametrized_tests(TestQuantFlow)

torchao/quantization/__init__.py

@@ -65,22 +65,10 @@
     PlainLayout,
     TensorCoreTiledLayout,
     UIntXWeightOnlyConfig,
-    float8_dynamic_activation_float8_weight,
-    float8_static_activation_float8_weight,
-    float8_weight_only,
-    fpx_weight_only,
     fqn_matches_fqn_config,
-    gemlite_uintx_weight_only,
-    int4_dynamic_activation_int4_weight,
-    int4_weight_only,
-    int8_dynamic_activation_int4_weight,
-    int8_dynamic_activation_int8_semi_sparse_weight,
-    int8_dynamic_activation_int8_weight,
-    int8_weight_only,
     intx_quantization_aware_training,
     quantize_,
     swap_conv2d_1x1_to_linear,
-    uintx_weight_only,
 )
 from .quant_primitives import (
     MappingType,
@@ -131,20 +119,8 @@
     "ALL_AUTOQUANT_CLASS_LIST",
     # top level API - manual
     "quantize_",
-    "int4_dynamic_activation_int4_weight",
-    "int8_dynamic_activation_int4_weight",
-    "int8_dynamic_activation_int8_weight",
-    "int8_dynamic_activation_int8_semi_sparse_weight",
-    "int4_weight_only",
-    "int8_weight_only",
     "intx_quantization_aware_training",
-    "float8_weight_only",
-    "float8_dynamic_activation_float8_weight",
-    "float8_static_activation_float8_weight",
-    "uintx_weight_only",
-    "fpx_weight_only",
     "fqn_matches_fqn_config",
-    "gemlite_uintx_weight_only",
     "swap_conv2d_1x1_to_linear",
     "Int4DynamicActivationInt4WeightConfig",
     "Int8DynamicActivationInt4WeightConfig",

torchao/quantization/quant_api.py

@@ -97,7 +97,6 @@
     to_weight_tensor_with_linear_activation_quantization_metadata,
 )
 from torchao.utils import (
-    _ConfigDeprecationWrapper,
     is_MI300,
     is_sm_at_least_89,
     is_sm_at_least_90,
@@ -146,18 +145,7 @@
     "autoquant",
     "_get_subclass_inserter",
     "quantize_",
-    "int8_dynamic_activation_int4_weight",
-    "int8_dynamic_activation_int8_weight",
-    "int8_dynamic_activation_int8_semi_sparse_weight",
-    "int4_weight_only",
-    "int8_weight_only",
     "intx_quantization_aware_training",
-    "float8_weight_only",
-    "uintx_weight_only",
-    "fpx_weight_only",
-    "gemlite_uintx_weight_only",
-    "float8_dynamic_activation_float8_weight",
-    "float8_static_activation_float8_weight",
     "Int8DynActInt4WeightQuantizer",
     "Float8DynamicActivationFloat8SemiSparseWeightConfig",
     "ModuleFqnToConfig",
@@ -464,7 +452,7 @@ def quantize_(
         # Int8DynamicActivationInt8WeightConfig (optimized with int8 mm op and torch.compile)
         # Int4WeightOnlyConfig (optimized with int4 tinygemm kernel and torch.compile)
         # Int8WeightOnlyConfig (optimized with int8 mm op and torch.compile
-        from torchao.quantization.quant_api import int4_weight_only
+        from torchao.quantization.quant_api import Int4WeightOnlyConfig
 
         m = nn.Sequential(nn.Linear(32, 1024), nn.Linear(1024, 32))
         quantize_(m, Int4WeightOnlyConfig(group_size=32, version=1))
@@ -596,12 +584,6 @@ def __post_init__(self):
         )
 
 
-# for BC
-int8_dynamic_activation_int4_weight = _ConfigDeprecationWrapper(
-    "int8_dynamic_activation_int4_weight", Int8DynamicActivationInt4WeightConfig
-)
-
-
 @register_quantize_module_handler(Int8DynamicActivationInt4WeightConfig)
 def _int8_dynamic_activation_int4_weight_transform(
     module: torch.nn.Module,
@@ -970,12 +952,6 @@ def __post_init__(self):
         )
 
 
-# for bc
-int4_dynamic_activation_int4_weight = _ConfigDeprecationWrapper(
-    "int4_dynamic_activation_int4_weight", Int4DynamicActivationInt4WeightConfig
-)
-
-
 @register_quantize_module_handler(Int4DynamicActivationInt4WeightConfig)
 def _int4_dynamic_activation_int4_weight_transform(
     module: torch.nn.Module, config: Int4DynamicActivationInt4WeightConfig
@@ -1036,12 +1012,6 @@ def __post_init__(self):
         )
 
 
-# for BC
-gemlite_uintx_weight_only = _ConfigDeprecationWrapper(
-    "gemlite_uintx_weight_only", GemliteUIntXWeightOnlyConfig
-)
-
-
 @register_quantize_module_handler(GemliteUIntXWeightOnlyConfig)
 def _gemlite_uintx_weight_only_transform(
     module: torch.nn.Module, config: GemliteUIntXWeightOnlyConfig
@@ -1119,11 +1089,6 @@ def __post_init__(self):
         torch._C._log_api_usage_once("torchao.quantization.Int4WeightOnlyConfig")
 
 
-# for BC
-# TODO maybe change other callsites
-int4_weight_only = _ConfigDeprecationWrapper("int4_weight_only", Int4WeightOnlyConfig)
-
-
 def _int4_weight_only_quantize_tensor(weight, config):
     # TODO(future PR): perhaps move this logic to a different file, to keep the API
     # file clean of implementation details
@@ -1335,10 +1300,6 @@ def __post_init__(self):
         torch._C._log_api_usage_once("torchao.quantization.Int8WeightOnlyConfig")
 
 
-# for BC
-int8_weight_only = _ConfigDeprecationWrapper("int8_weight_only", Int8WeightOnlyConfig)
-
-
 def _int8_weight_only_quantize_tensor(weight, config):
     mapping_type = MappingType.SYMMETRIC
     target_dtype = torch.int8
@@ -1503,12 +1464,6 @@ def __post_init__(self):
         )
 
 
-# for BC
-int8_dynamic_activation_int8_weight = _ConfigDeprecationWrapper(
-    "int8_dynamic_activation_int8_weight", Int8DynamicActivationInt8WeightConfig
-)
-
-
 def _int8_dynamic_activation_int8_weight_quantize_tensor(weight, config):
     layout = config.layout
     act_mapping_type = config.act_mapping_type
@@ -1614,12 +1569,6 @@ def __post_init__(self):
         torch._C._log_api_usage_once("torchao.quantization.Float8WeightOnlyConfig")
 
 
-# for BC
-float8_weight_only = _ConfigDeprecationWrapper(
-    "float8_weight_only", Float8WeightOnlyConfig
-)
-
-
 def _float8_weight_only_quant_tensor(weight, config):
     if config.version == 1:
         warnings.warn(
@@ -1797,12 +1746,6 @@ def __post_init__(self):
             self.mm_config = Float8MMConfig(use_fast_accum=default_use_fast_accum)
 
 
-# for bc
-float8_dynamic_activation_float8_weight = _ConfigDeprecationWrapper(
-    "float8_dynamic_activation_float8_weight", Float8DynamicActivationFloat8WeightConfig
-)
-
-
 def _float8_dynamic_activation_float8_weight_quantize_tensor(weight, config):
     activation_dtype = config.activation_dtype
     weight_dtype = config.weight_dtype
@@ -2005,12 +1948,6 @@ def __post_init__(self):
         )
 
 
-# for bc
-float8_static_activation_float8_weight = _ConfigDeprecationWrapper(
-    "float8_static_activation_float8_weight", Float8StaticActivationFloat8WeightConfig
-)
-
-
 @register_quantize_module_handler(Float8StaticActivationFloat8WeightConfig)
 def _float8_static_activation_float8_weight_transform(
     module: torch.nn.Module, config: Float8StaticActivationFloat8WeightConfig
@@ -2096,12 +2033,6 @@ def __post_init__(self):
         )
 
 
-# for BC
-uintx_weight_only = _ConfigDeprecationWrapper(
-    "uintx_weight_only", UIntXWeightOnlyConfig
-)
-
-
 @register_quantize_module_handler(UIntXWeightOnlyConfig)
 def _uintx_weight_only_transform(
     module: torch.nn.Module, config: UIntXWeightOnlyConfig
@@ -2383,10 +2314,6 @@ def __post_init__(self):
         )
 
 
-# for BC
-fpx_weight_only = _ConfigDeprecationWrapper("fpx_weight_only", FPXWeightOnlyConfig)
-
-
 @register_quantize_module_handler(FPXWeightOnlyConfig)
 def _fpx_weight_only_transform(
     module: torch.nn.Module, config: FPXWeightOnlyConfig

torchao/utils.py

@@ -8,11 +8,10 @@
 import itertools
 import re
 import time
-import warnings
 from functools import reduce
 from importlib.metadata import version
 from math import gcd
-from typing import Any, Callable, Optional, Type
+from typing import Any, Callable, Optional
 
 import torch
 import torch.nn.utils.parametrize as parametrize
@@ -368,25 +367,6 @@ def torch_version_at_least(min_version):
     return parse_version(torch.__version__) >= parse_version(min_version)
 
 
-class _ConfigDeprecationWrapper:
-    """
-    A deprecation wrapper that directs users from a deprecated "config function"
-    (e.g. `int4_weight_only`) to the replacement config class.
-    """
-
-    def __init__(self, deprecated_name: str, config_cls: Type):
-        self.deprecated_name = deprecated_name
-        self.config_cls = config_cls
-
-    def __call__(self, *args, **kwargs):
-        warnings.warn(
-            f"`{self.deprecated_name}` is deprecated and will be removed in a future release. "
-            f"Please use `{self.config_cls.__name__}` instead. Example usage:\n"
-            f"    quantize_(model, {self.config_cls.__name__}(...))"
-        )
-        return self.config_cls(*args, **kwargs)
-
-
 """
 Helper function for implementing aten op or torch function dispatch
 and dispatching to these implementations.