[tests] tighten compilation tests for quantization (#12002)

* tighten compilation tests for quantization

* up

* up

Author: sayakpaul

tests/quantization/bnb/test_4bit.py

@@ -886,6 +886,7 @@ def quantization_config(self):
             components_to_quantize=["transformer", "text_encoder_2"],
         )
 
+    @require_bitsandbytes_version_greater("0.46.1")
     def test_torch_compile(self):
         torch._dynamo.config.capture_dynamic_output_shape_ops = True
         super().test_torch_compile()

tests/quantization/bnb/test_mixed_int8.py

@@ -847,6 +847,10 @@ def quantization_config(self):
             components_to_quantize=["transformer", "text_encoder_2"],
         )
 
+    @pytest.mark.xfail(
+        reason="Test fails because of an offloading problem from Accelerate with confusion in hooks."
+        " Test passes without recompilation context manager. Refer to https://github.com/huggingface/diffusers/pull/12002/files#r2240462757 for details."
+    )
     def test_torch_compile(self):
         torch._dynamo.config.capture_dynamic_output_shape_ops = True
         super()._test_torch_compile(torch_dtype=torch.float16)

tests/quantization/test_torch_compile_utils.py

@@ -56,12 +56,18 @@ def _test_torch_compile(self, torch_dtype=torch.bfloat16):
         pipe.transformer.compile(fullgraph=True)
 
         # small resolutions to ensure speedy execution.
-        pipe("a dog", num_inference_steps=2, max_sequence_length=16, height=256, width=256)
+        with torch._dynamo.config.patch(error_on_recompile=True):
+            pipe("a dog", num_inference_steps=2, max_sequence_length=16, height=256, width=256)
 
     def _test_torch_compile_with_cpu_offload(self, torch_dtype=torch.bfloat16):
         pipe = self._init_pipeline(self.quantization_config, torch_dtype)
         pipe.enable_model_cpu_offload()
-        pipe.transformer.compile()
+        # regional compilation is better for offloading.
+        # see: https://pytorch.org/blog/torch-compile-and-diffusers-a-hands-on-guide-to-peak-performance/
+        if getattr(pipe.transformer, "_repeated_blocks"):
+            pipe.transformer.compile_repeated_blocks(fullgraph=True)
+        else:
+            pipe.transformer.compile()
 
         # small resolutions to ensure speedy execution.
         pipe("a dog", num_inference_steps=2, max_sequence_length=16, height=256, width=256)