[Intel GPU] Extend TestQAT module with xpu testcases

Add xpu mode to tests from test_qat.py TestQAT module

Author: agrabow

test/quantization/test_qat.py

@@ -213,6 +213,9 @@ def forward(self, x):
 
 class TestQAT(TestCase):
     SEED = 123
+    DEVICE = torch.accelerator.current_accelerator() if \
+            torch.accelerator.is_available() else \
+            None
 
     def test_fake_quantize_per_channel_group(self):
         n_bit = 4
@@ -347,7 +350,7 @@ def _set_ptq_weight(
                 group_size,
             )
             q_weight = torch.ops.aten._convert_weight_to_int4pack(
-                q_weight.to("cuda"),
+                q_weight.to(self.DEVICE),
                 qat_linear.inner_k_tiles,
             )
             ptq_linear.weight = q_weight
@@ -600,13 +603,13 @@ def _assert_close_4w(self, val, ref):
         print(mean_err)
         self.assertTrue(mean_err < 0.05)
 
-    @unittest.skipIf(not _CUDA_IS_AVAILABLE, "skipping when cuda is not available")
+    @unittest.skipIf(DEVICE == None, "skipping when GPU is not available")
     def test_qat_4w_primitives(self):
         n_bit = 4
         group_size = 32
         inner_k_tiles = 8
         scales_precision = torch.bfloat16
-        device = torch.device("cuda")
+        device = self.DEVICE
         dtype = torch.bfloat16
         torch.manual_seed(self.SEED)
         x = torch.randn(100, 256, dtype=dtype, device=device)
@@ -651,13 +654,13 @@ def test_qat_4w_primitives(self):
 
         self._assert_close_4w(qat_out, ptq_out)
 
-    @unittest.skipIf(not _CUDA_IS_AVAILABLE, "skipping when cuda is not available")
+    @unittest.skipIf(DEVICE == None, "skipping when GPU is not available")
     def test_qat_4w_linear(self):
         from torchao.quantization.GPTQ import WeightOnlyInt4Linear
         from torchao.quantization.qat.linear import Int4WeightOnlyQATLinear
 
         group_size = 128
-        device = torch.device("cuda")
+        device = self.DEVICE
         dtype = torch.bfloat16
         torch.manual_seed(self.SEED)
         qat_linear = Int4WeightOnlyQATLinear(
@@ -692,15 +695,15 @@ def test_qat_4w_quantizer_gradients(self):
         quantizer = Int4WeightOnlyQATQuantizer(groupsize=32, inner_k_tiles=8)
         self._test_qat_quantized_gradients(quantizer)
 
-    @unittest.skipIf(not _CUDA_IS_AVAILABLE, "skipping when cuda is not available")
+    @unittest.skipIf(DEVICE == None, "skipping when GPU is not available")
+    @unittest.skipIf(DEVICE == torch.device("xpu"), "skipped due to https://github.com/intel/torch-xpu-ops/issues/1770")
     def test_qat_4w_quantizer(self):
         from torchao.quantization.GPTQ import Int4WeightOnlyQuantizer
         from torchao.quantization.qat import Int4WeightOnlyQATQuantizer
-
         group_size = 32
         inner_k_tiles = 8
-        device = torch.device("cuda")
         dtype = torch.bfloat16
+        device = self.DEVICE
         torch.manual_seed(self.SEED)
         m = M().to(device).to(dtype)
         m2 = copy.deepcopy(m)
@@ -711,6 +714,7 @@ def test_qat_4w_quantizer(self):
         ptq_quantizer = Int4WeightOnlyQuantizer(
             groupsize=group_size,
             inner_k_tiles=inner_k_tiles,
+            device=device
         )
         qat_model = qat_quantizer.prepare(m)
         ptq_model = ptq_quantizer.quantize(m2)
@@ -1891,12 +1895,12 @@ def _test_quantize_api_against_ptq(
         torch.manual_seed(self.SEED)
 
         if module_type == "linear":
-            m = M().to(dtype).cuda()
-            example_inputs = (m.example_inputs()[0].to(dtype).cuda(),)
+            m = M().to(dtype).to(self.DEVICE)
+            example_inputs = (m.example_inputs()[0].to(dtype).to(self.DEVICE),)
             filter_fn = lambda m, fqn: isinstance(m, torch.nn.Linear)
         elif module_type == "embedding":
-            m = M3().to(dtype).cuda()
-            example_inputs = (m.example_inputs()[0].cuda(),)
+            m = M3().to(dtype).to(self.DEVICE)
+            example_inputs = (m.example_inputs()[0].to(self.DEVICE),)
             filter_fn = lambda m, fqn: isinstance(m, torch.nn.Embedding)
         else:
             raise ValueError(f"Unknown module type {module_type}")
@@ -1971,7 +1975,7 @@ def test_quantize_api_int4(self, version: int, packing_format: Int4PackingFormat
             target_convert_sqnr=float("inf"),
         )
 
-    @unittest.skipIf(not _CUDA_IS_AVAILABLE, "skipping when cuda is not available")
+    @unittest.skipIf(DEVICE == None, "skipping when GPU is not available")
     def test_quantize_api_int8_int4(self):
         """
         Test the following:
@@ -1984,7 +1988,7 @@ def test_quantize_api_int8_int4(self):
             target_convert_sqnr=float("inf"),
         )
 
-    @unittest.skipIf(not _CUDA_IS_AVAILABLE, "skipping when cuda is not available")
+    @unittest.skipIf(DEVICE == None, "skipping when GPU is not available")
     @parametrize(
         "weight_dtype, weight_granularity, dtype",
         [
@@ -2009,7 +2013,7 @@ def test_quantize_api_int8_intx(self, weight_dtype, weight_granularity, dtype):
             dtype=dtype,
         )
 
-    @unittest.skipIf(not _CUDA_IS_AVAILABLE, "skipping when cuda is not available")
+    @unittest.skipIf(DEVICE == None, "skipping when GPU is not available")
     @parametrize(
         "weight_dtype, granularity, dtype, module_type",
         [