update expected results of slow tests (#268)

* update expected results of slow tests

* relax sum and mean tests

* Print shapes when reporting exception

* formatting

* fix sentence

* relax test_stable_diffusion_fast_ddim for gpu fp16

* relax flakey tests on GPU

* added comment on large tolerences

* black

* format

* set scheduler seed

* added generator

* use np.isclose

* set num_inference_steps to 50

* fix dep. warning

* update expected_slice

* preprocess if image

* updated expected results

* updated expected from CI

* pass generator to VAE

* undo change back to orig

* use orignal

* revert back the expected on cpu

* revert back values for CPU

* more undo

* update result after using gen

* update mean

* set generator for mps

* update expected on CI server

* undo

* use new seed every time

* cpu manual seed

* reduce num_inference_steps

* style

* use generator for randn

Co-authored-by: Patrick von Platen <patrick.v.platen@gmail.com>

src/diffusers/models/vae.py

@@ -557,7 +557,11 @@ class AutoencoderKL(ModelMixin, ConfigMixin):
         return DecoderOutput(sample=dec)
 
     def forward(
-        self, sample: torch.FloatTensor, sample_posterior: bool = False, return_dict: bool = True
+        self,
+        sample: torch.FloatTensor,
+        sample_posterior: bool = False,
+        return_dict: bool = True,
+        generator: Optional[torch.Generator] = None,
     ) -> Union[DecoderOutput, torch.FloatTensor]:
         r"""
         Args:
@@ -570,7 +574,7 @@ class AutoencoderKL(ModelMixin, ConfigMixin):
         x = sample
         posterior = self.encode(x).latent_dist
         if sample_posterior:
-            z = posterior.sample()
+            z = posterior.sample(generator=generator)
         else:
             z = posterior.mode()
         dec = self.decode(z).sample

src/diffusers/pipelines/stable_diffusion/pipeline_stable_diffusion_img2img.py

@@ -178,7 +178,7 @@ class StableDiffusionImg2ImgPipeline(DiffusionPipeline):
 
         self.scheduler.set_timesteps(num_inference_steps, **extra_set_kwargs)
 
-        if not isinstance(init_image, torch.FloatTensor):
+        if isinstance(init_image, PIL.Image.Image):
             init_image = preprocess(init_image)
 
         # encode the init image into latents and scale the latents

tests/test_models_unet.py

@@ -138,11 +138,13 @@ class UNetLDMModelTests(ModelTesterMixin, unittest.TestCase):
         model.eval()
         model.to(torch_device)
 
-        torch.manual_seed(0)
+        noise = torch.randn(
-        if torch.cuda.is_available():
+            1,
-            torch.cuda.manual_seed_all(0)
+            model.config.in_channels,
-
+            model.config.sample_size,
-        noise = torch.randn(1, model.config.in_channels, model.config.sample_size, model.config.sample_size)
+            model.config.sample_size,
+            generator=torch.manual_seed(0),
+        )
         noise = noise.to(torch_device)
         time_step = torch.tensor([10] * noise.shape[0]).to(torch_device)
 
@@ -154,7 +156,7 @@ class UNetLDMModelTests(ModelTesterMixin, unittest.TestCase):
         expected_output_slice = torch.tensor([-13.3258, -20.1100, -15.9873, -17.6617, -23.0596, -17.9419, -13.3675, -16.1889, -12.3800])
         # fmt: on
 
-        self.assertTrue(torch.allclose(output_slice, expected_output_slice, atol=1e-3))
+        self.assertTrue(torch.allclose(output_slice, expected_output_slice, rtol=1e-3))
 
 
 #    TODO(Patrick) - Re-add this test after having cleaned up LDM

tests/test_models_vae.py

@@ -87,18 +87,24 @@ class AutoencoderKLTests(ModelTesterMixin, unittest.TestCase):
             image = image.to(torch_device)
             with torch.no_grad():
                 _ = model(image, sample_posterior=True).sample
+            generator = torch.manual_seed(0)
+        else:
+            generator = torch.Generator(device=torch_device).manual_seed(0)
 
-        torch.manual_seed(0)
+        image = torch.randn(
-        if torch.cuda.is_available():
+            1,
-            torch.cuda.manual_seed_all(0)
+            model.config.in_channels,
-
+            model.config.sample_size,
-        image = torch.randn(1, model.config.in_channels, model.config.sample_size, model.config.sample_size)
+            model.config.sample_size,
+            generator=torch.manual_seed(0),
+        )
         image = image.to(torch_device)
         with torch.no_grad():
-            output = model(image, sample_posterior=True).sample
+            output = model(image, sample_posterior=True, generator=generator).sample
 
         output_slice = output[0, -1, -3:, -3:].flatten().cpu()
+
         # fmt: off
-        expected_output_slice = torch.tensor([-4.0078e-01, -3.8304e-04, -1.2681e-01, -1.1462e-01, 2.0095e-01, 1.0893e-01, -8.8248e-02, -3.0361e-01, -9.8646e-03])
+        expected_output_slice = torch.tensor([-0.1352, 0.0878, 0.0419, -0.0818, -0.1069, 0.0688, -0.1458, -0.4446, -0.0026])
         # fmt: on
         self.assertTrue(torch.allclose(output_slice, expected_output_slice, rtol=1e-2))

tests/test_models_vq.py

@@ -94,4 +94,4 @@ class VQModelTests(ModelTesterMixin, unittest.TestCase):
         # fmt: off
         expected_output_slice = torch.tensor([-0.0153, -0.4044, -0.1880, -0.5161, -0.2418, -0.4072, -0.1612, -0.0633, -0.0143])
         # fmt: on
-        self.assertTrue(torch.allclose(output_slice, expected_output_slice, rtol=1e-2))
+        self.assertTrue(torch.allclose(output_slice, expected_output_slice, atol=1e-3))

tests/test_pipelines.py

@@ -330,6 +330,7 @@ class PipelineFastTests(unittest.TestCase):
 
         assert image.shape == (1, 128, 128, 3)
         expected_slice = np.array([0.5112, 0.4692, 0.4715, 0.5206, 0.4894, 0.5114, 0.5096, 0.4932, 0.4755])
+
         assert np.abs(image_slice.flatten() - expected_slice).max() < 1e-2
         assert np.abs(image_from_tuple_slice.flatten() - expected_slice).max() < 1e-2
 
@@ -463,17 +464,18 @@ class PipelineFastTests(unittest.TestCase):
         sde_ve.to(torch_device)
         sde_ve.set_progress_bar_config(disable=None)
 
-        torch.manual_seed(0)
+        generator = torch.manual_seed(0)
-        image = sde_ve(num_inference_steps=2, output_type="numpy").images
+        image = sde_ve(num_inference_steps=2, output_type="numpy", generator=generator).images
 
-        torch.manual_seed(0)
+        generator = torch.manual_seed(0)
-        image_from_tuple = sde_ve(num_inference_steps=2, output_type="numpy", return_dict=False)[0]
+        image_from_tuple = sde_ve(num_inference_steps=2, output_type="numpy", generator=generator, return_dict=False)[
+            0
+        ]
 
         image_slice = image[0, -3:, -3:, -1]
         image_from_tuple_slice = image_from_tuple[0, -3:, -3:, -1]
 
         assert image.shape == (1, 32, 32, 3)
-
         expected_slice = np.array([0.0, 1.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0])
         assert np.abs(image_slice.flatten() - expected_slice).max() < 1e-2
         assert np.abs(image_from_tuple_slice.flatten() - expected_slice).max() < 1e-2
@@ -647,7 +649,7 @@ class PipelineFastTests(unittest.TestCase):
         bert = self.dummy_text_encoder
         tokenizer = CLIPTokenizer.from_pretrained("hf-internal-testing/tiny-random-clip")
 
-        image = self.dummy_image.to(device).permute(0, 2, 3, 1)[0]
+        image = self.dummy_image.cpu().permute(0, 2, 3, 1)[0]
         init_image = Image.fromarray(np.uint8(image)).convert("RGB")
         mask_image = Image.fromarray(np.uint8(image + 4)).convert("RGB").resize((128, 128))
 
@@ -729,8 +731,8 @@ class PipelineTesterMixin(unittest.TestCase):
             new_ddpm.to(torch_device)
 
         generator = torch.manual_seed(0)
-
         image = ddpm(generator=generator, output_type="numpy").images
+
         generator = generator.manual_seed(0)
         new_image = new_ddpm(generator=generator, output_type="numpy").images
 
@@ -750,8 +752,8 @@ class PipelineTesterMixin(unittest.TestCase):
         ddpm_from_hub.set_progress_bar_config(disable=None)
 
         generator = torch.manual_seed(0)
-
         image = ddpm(generator=generator, output_type="numpy").images
+
         generator = generator.manual_seed(0)
         new_image = ddpm_from_hub(generator=generator, output_type="numpy").images
 
@@ -774,8 +776,8 @@ class PipelineTesterMixin(unittest.TestCase):
         ddpm_from_hub_custom_model.set_progress_bar_config(disable=None)
 
         generator = torch.manual_seed(0)
-
         image = ddpm_from_hub_custom_model(generator=generator, output_type="numpy").images
+
         generator = generator.manual_seed(0)
         new_image = ddpm_from_hub(generator=generator, output_type="numpy").images
 
@@ -981,14 +983,14 @@ class PipelineTesterMixin(unittest.TestCase):
         sde_ve.to(torch_device)
         sde_ve.set_progress_bar_config(disable=None)
 
-        torch.manual_seed(0)
+        generator = torch.manual_seed(0)
-        image = sde_ve(num_inference_steps=300, output_type="numpy").images
+        image = sde_ve(num_inference_steps=10, output_type="numpy", generator=generator).images
 
         image_slice = image[0, -3:, -3:, -1]
 
         assert image.shape == (1, 256, 256, 3)
 
-        expected_slice = np.array([0.64363, 0.5868, 0.3031, 0.2284, 0.7409, 0.3216, 0.25643, 0.6557, 0.2633])
+        expected_slice = np.array([0.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 0.0, 0.0])
         assert np.abs(image_slice.flatten() - expected_slice).max() < 1e-2
 
     @slow

tests/test_scheduler.py

@@ -318,13 +318,14 @@ class DDPMSchedulerTest(SchedulerCommonTest):
 
         model = self.dummy_model()
         sample = self.dummy_sample_deter
+        generator = torch.manual_seed(0)
 
         for t in reversed(range(num_trained_timesteps)):
             # 1. predict noise residual
             residual = model(sample, t)
 
             # 2. predict previous mean of sample x_t-1
-            pred_prev_sample = scheduler.step(residual, t, sample).prev_sample
+            pred_prev_sample = scheduler.step(residual, t, sample, generator=generator).prev_sample
 
             # if t > 0:
             #     noise = self.dummy_sample_deter
@@ -336,7 +337,7 @@ class DDPMSchedulerTest(SchedulerCommonTest):
         result_sum = torch.sum(torch.abs(sample))
         result_mean = torch.mean(torch.abs(sample))
 
-        assert abs(result_sum.item() - 259.0883) < 1e-2
+        assert abs(result_sum.item() - 258.9070) < 1e-2
         assert abs(result_mean.item() - 0.3374) < 1e-3
 
 
@@ -657,7 +658,7 @@ class PNDMSchedulerTest(SchedulerCommonTest):
 class ScoreSdeVeSchedulerTest(unittest.TestCase):
     # TODO adapt with class SchedulerCommonTest (scheduler needs Numpy Integration)
     scheduler_classes = (ScoreSdeVeScheduler,)
-    forward_default_kwargs = (("seed", 0),)
+    forward_default_kwargs = ()
 
     @property
     def dummy_sample(self):
@@ -718,13 +719,19 @@ class ScoreSdeVeSchedulerTest(unittest.TestCase):
                 scheduler.save_config(tmpdirname)
                 new_scheduler = scheduler_class.from_config(tmpdirname)
 
-            output = scheduler.step_pred(residual, time_step, sample, **kwargs).prev_sample
+            output = scheduler.step_pred(
-            new_output = new_scheduler.step_pred(residual, time_step, sample, **kwargs).prev_sample
+                residual, time_step, sample, generator=torch.manual_seed(0), **kwargs
+            ).prev_sample
+            new_output = new_scheduler.step_pred(
+                residual, time_step, sample, generator=torch.manual_seed(0), **kwargs
+            ).prev_sample
 
             assert torch.sum(torch.abs(output - new_output)) < 1e-5, "Scheduler outputs are not identical"
 
-            output = scheduler.step_correct(residual, sample, **kwargs).prev_sample
+            output = scheduler.step_correct(residual, sample, generator=torch.manual_seed(0), **kwargs).prev_sample
-            new_output = new_scheduler.step_correct(residual, sample, **kwargs).prev_sample
+            new_output = new_scheduler.step_correct(
+                residual, sample, generator=torch.manual_seed(0), **kwargs
+            ).prev_sample
 
             assert torch.sum(torch.abs(output - new_output)) < 1e-5, "Scheduler correction are not identical"
 
@@ -743,13 +750,19 @@ class ScoreSdeVeSchedulerTest(unittest.TestCase):
                 scheduler.save_config(tmpdirname)
                 new_scheduler = scheduler_class.from_config(tmpdirname)
 
-            output = scheduler.step_pred(residual, time_step, sample, **kwargs).prev_sample
+            output = scheduler.step_pred(
-            new_output = new_scheduler.step_pred(residual, time_step, sample, **kwargs).prev_sample
+                residual, time_step, sample, generator=torch.manual_seed(0), **kwargs
+            ).prev_sample
+            new_output = new_scheduler.step_pred(
+                residual, time_step, sample, generator=torch.manual_seed(0), **kwargs
+            ).prev_sample
 
             assert torch.sum(torch.abs(output - new_output)) < 1e-5, "Scheduler outputs are not identical"
 
-            output = scheduler.step_correct(residual, sample, **kwargs).prev_sample
+            output = scheduler.step_correct(residual, sample, generator=torch.manual_seed(0), **kwargs).prev_sample
-            new_output = new_scheduler.step_correct(residual, sample, **kwargs).prev_sample
+            new_output = new_scheduler.step_correct(
+                residual, sample, generator=torch.manual_seed(0), **kwargs
+            ).prev_sample
 
             assert torch.sum(torch.abs(output - new_output)) < 1e-5, "Scheduler correction are not identical"
 
@@ -779,6 +792,7 @@ class ScoreSdeVeSchedulerTest(unittest.TestCase):
 
         scheduler.set_sigmas(num_inference_steps)
         scheduler.set_timesteps(num_inference_steps)
+        generator = torch.manual_seed(0)
 
         for i, t in enumerate(scheduler.timesteps):
             sigma_t = scheduler.sigmas[i]
@@ -786,19 +800,19 @@ class ScoreSdeVeSchedulerTest(unittest.TestCase):
             for _ in range(scheduler.correct_steps):
                 with torch.no_grad():
                     model_output = model(sample, sigma_t)
-                sample = scheduler.step_correct(model_output, sample, **kwargs).prev_sample
+                sample = scheduler.step_correct(model_output, sample, generator=generator, **kwargs).prev_sample
 
             with torch.no_grad():
                 model_output = model(sample, sigma_t)
 
-            output = scheduler.step_pred(model_output, t, sample, **kwargs)
+            output = scheduler.step_pred(model_output, t, sample, generator=generator, **kwargs)
             sample, _ = output.prev_sample, output.prev_sample_mean
 
         result_sum = torch.sum(torch.abs(sample))
         result_mean = torch.mean(torch.abs(sample))
 
-        assert abs(result_sum.item() - 14379591680.0) < 1e-2
+        assert np.isclose(result_sum.item(), 14372758528.0)
-        assert abs(result_mean.item() - 18723426.0) < 1e-3
+        assert np.isclose(result_mean.item(), 18714530.0)
 
     def test_step_shape(self):
         kwargs = dict(self.forward_default_kwargs)
@@ -817,8 +831,8 @@ class ScoreSdeVeSchedulerTest(unittest.TestCase):
             elif num_inference_steps is not None and not hasattr(scheduler, "set_timesteps"):
                 kwargs["num_inference_steps"] = num_inference_steps
 
-            output_0 = scheduler.step_pred(residual, 0, sample, **kwargs).prev_sample
+            output_0 = scheduler.step_pred(residual, 0, sample, generator=torch.manual_seed(0), **kwargs).prev_sample
-            output_1 = scheduler.step_pred(residual, 1, sample, **kwargs).prev_sample
+            output_1 = scheduler.step_pred(residual, 1, sample, generator=torch.manual_seed(0), **kwargs).prev_sample
 
             self.assertEqual(output_0.shape, sample.shape)
             self.assertEqual(output_0.shape, output_1.shape)