int8 dynamic quant + bsr support (#821)

This PR, adds in int8 dynamicquant + bsr support.

Changes:
* Use i8i8 -> bf16 matmul to maintain accuracy
* Added a block sparse layout type to AffineQuantizedTensor + check/impl.  
* Cleaned up benchmark.py script and add a single line `benchmark.sh` file for acceleration numbers
* Updated eval.py and added a single line `evaluate.sh` file for accuracy numbers
* Lots of lint formatting and README updates
* torch.compile now working and is correct

test/sparsity/test_sparse_api.py

@@ -4,27 +4,24 @@
 
 import torch
 from torch import nn
-
-from torchao.sparsity import (
-    apply_fake_sparsity,
-    sparsify_,
-    semi_sparse_weight,
-)
+from torch.testing._internal import common_utils
 from torchao.dtypes import MarlinSparseLayoutType, SemiSparseLayoutType
 from torchao.quantization.quant_api import (
+    int4_weight_only,
     int8_dynamic_activation_int8_weight,
     quantize_,
-    int4_weight_only,
 )
-from torchao.utils import TORCH_VERSION_AT_LEAST_2_3
-from torch.testing._internal.common_utils import TestCase
+
+from torchao.sparsity import apply_fake_sparsity, semi_sparse_weight, sparsify_
+from torchao.utils import TORCH_VERSION_AFTER_2_5, TORCH_VERSION_AT_LEAST_2_3, TORCH_VERSION_AT_LEAST_2_5, TORCH_VERSION_AT_LEAST_2_4
 
 
 logging.basicConfig(
     format="%(asctime)s - %(name)s - %(levelname)s - %(message)s", level=logging.INFO
 )
 
-class TestSemiStructuredSparse(TestCase):
+
+class TestSemiStructuredSparse(common_utils.TestCase):
 
     @unittest.skipIf(not TORCH_VERSION_AT_LEAST_2_3, "pytorch 2.3+ feature")
     @unittest.skipIf(not torch.cuda.is_available(), "Need CUDA available")
@@ -37,6 +34,7 @@ def test_sparse(self):
             )
             .half()
             .cuda()
+            .eval()
         )
 
         apply_fake_sparsity(model)
@@ -45,13 +43,17 @@ def test_sparse(self):
         sparsify_(model, semi_sparse_weight())
         sparse_result = model(input)
 
-        assert torch.allclose(dense_result, sparse_result, rtol=1e-3, atol=1e-3)
+        torch.testing.assert_close(dense_result, sparse_result, rtol=1e-3, atol=1e-3)
 
-class TestQuantSemiSparse(TestCase):
 
-    @unittest.skipIf(not TORCH_VERSION_AT_LEAST_2_3, "pytorch 2.3+ feature")
+class TestQuantSemiSparse(common_utils.TestCase):
+
+    @unittest.skipIf(not TORCH_VERSION_AT_LEAST_2_5, "pytorch 2.5+ feature")
     @unittest.skipIf(not torch.cuda.is_available(), "Need CUDA available")
-    def test_quant_semi_sparse(self):
+    @common_utils.parametrize("compile", [True, False])
+    def test_quant_semi_sparse(self, compile):
+        torch.sparse.SparseSemiStructuredTensor._FORCE_CUTLASS = False
+
         input = torch.rand((128, 128)).half().cuda()
         model = (
             nn.Sequential(
@@ -60,19 +62,27 @@ def test_quant_semi_sparse(self):
             )
             .half()
             .cuda()
+            .eval()
         )
         apply_fake_sparsity(model)
         model_copy = copy.deepcopy(model)
         quantize_(model_copy, int8_dynamic_activation_int8_weight())
         dense_result = model_copy(input)
 
-        quantize_(model, int8_dynamic_activation_int8_weight(layout_type=SemiSparseLayoutType()))
+        quantize_(
+            model,
+            int8_dynamic_activation_int8_weight(layout_type=SemiSparseLayoutType()),
+        )
+        if compile:
+            model = torch.compile(model)
         sparse_result = model(input)
 
-        assert torch.allclose(dense_result, sparse_result, rtol=1e-2, atol=1e-2)
+        torch.testing.assert_close(dense_result, sparse_result, rtol=1e-2, atol=1e-2)
 
+    @unittest.skipIf(not TORCH_VERSION_AT_LEAST_2_5, "pytorch 2.5+ feature")
     @unittest.skipIf(not torch.cuda.is_available(), "Need CUDA available")
-    def test_sparse_marlin(self):
+    @common_utils.parametrize("compile", [True, False])
+    def test_sparse_marlin(self, compile):
         input = torch.rand((256, 256)).half().cuda()
         model = (
             nn.Sequential(
@@ -81,6 +91,7 @@ def test_sparse_marlin(self):
             )
             .half()
             .cuda()
+            .eval()
         )
 
         apply_fake_sparsity(model)
@@ -92,9 +103,101 @@ def test_sparse_marlin(self):
 
         # Sparse + quantized
         quantize_(model, int4_weight_only(layout_type=MarlinSparseLayoutType()))
+        if compile:
+            model = torch.compile(model)
         sparse_result = model(input)
 
-        assert torch.allclose(dense_result, sparse_result, atol=3e-1), "Results are not close"
+        torch.testing.assert_close(dense_result, sparse_result, atol=3e-1, rtol=3e-1)
+
+
+class TestBlockSparseWeight(common_utils.TestCase):
+    @unittest.skipIf(not TORCH_VERSION_AT_LEAST_2_4, "pytorch 2.4+ feature due to need for custom op support")
+    @unittest.skipIf(not torch.cuda.is_available(), "Need CUDA available")
+    @common_utils.parametrize("compile", [True, False])
+    def test_sparse(self, compile):
+        input = torch.rand((1024, 1024)).half().cuda()
+        model = (
+            nn.Sequential(
+                nn.Linear(1024, 2048),
+                nn.Linear(2048, 1024),
+            )
+            .half()
+            .cuda()
+            .eval()
+        )
+
+        from torchao.sparsity.utils import create_block_sparse_tensor
+
+        M, N = model[0].weight.shape
+        model[0].weight.data = create_block_sparse_tensor(M, N, 64, 0.5, torch.float16)
+        M, N = model[1].weight.shape
+        model[1].weight.data = create_block_sparse_tensor(M, N, 64, 0.5, torch.float16)
+        dense_result = model(input)
+
+        from torchao.sparsity.prototype.superblock.blocksparse import (
+            block_sparse_weight,
+        )
+
+        sparsify_(model, block_sparse_weight(blocksize=64))
+        # if compile:
+        #     model = torch.compile(model)
+        sparse_result = model(input)
+
+        torch.testing.assert_close(dense_result, sparse_result, rtol=1e-3, atol=1e-3)
+
+
+class TestQuantBlockSparseWeight(common_utils.TestCase):
+    @unittest.skipIf(not TORCH_VERSION_AFTER_2_5, "pytorch 2.6+ feature")
+    @unittest.skipIf(not torch.cuda.is_available(), "Need CUDA available")
+    @common_utils.parametrize("compile", [True, False])
+    def test_sparse(self, compile):
+        input = torch.rand((256, 128)).to(torch.bfloat16).cuda()
+        model = (
+            nn.Sequential(
+                nn.Linear(128, 256),
+                nn.Linear(256, 128),
+            )
+            .to(torch.bfloat16)
+            .cuda()
+            .eval()
+        )
+        from torchao.sparsity.prototype.superblock.blocksparse import (
+            blocksparse_int_addmm,
+        )
+        from torchao.sparsity.utils import create_block_sparse_tensor
+
+        M, N = model[0].weight.shape
+        model[0].weight.data = (
+            create_block_sparse_tensor(M, N, 64, 0.5, torch.bfloat16)
+            * torch.rand(M, N, dtype=torch.bfloat16).cuda()
+        )
+        M, N = model[1].weight.shape
+        model[1].weight.data = create_block_sparse_tensor(M, N, 64, 0.5, torch.bfloat16)
+
+        model_copy = copy.deepcopy(model)
+
+        quantize_(model_copy, int8_dynamic_activation_int8_weight())
+        reference = model_copy(input)
+
+        from torchao.dtypes.affine_quantized_tensor import BlockSparseLayoutType
+
+        quantize_(
+            model,
+            int8_dynamic_activation_int8_weight(
+                layout_type=BlockSparseLayoutType(blocksize=64)
+            ),
+        )
+        if compile:
+            model = torch.compile(model)
+        sparse_result = model(input)
+
+        torch.testing.assert_close(reference, sparse_result, rtol=1e-1, atol=1e-1)
+
+
+common_utils.instantiate_parametrized_tests(TestSemiStructuredSparse)
+common_utils.instantiate_parametrized_tests(TestQuantSemiSparse)
+common_utils.instantiate_parametrized_tests(TestBlockSparseWeight)
+common_utils.instantiate_parametrized_tests(TestQuantBlockSparseWeight)
 
 if __name__ == "__main__":
     unittest.main()