Improve reproduceability 2/3 (#1906)

* [Repro] Correct reproducability

* up

* up

* uP

* up

* need better image

* allow conversion from no state dict checkpoints

* up

* up

* up

* up

* check tensors

* check tensors

* check tensors

* check tensors

* next try

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* up

* better name

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* Apply suggestions from code review

* correct more

* up

* replace all torch randn

* fix

* correct

* correct

* finish

* fix more

* up

src/diffusers/experimental/rl/value_guided_sampling.py

@@ -19,6 +19,7 @@ import tqdm
 
 from ...models.unet_1d import UNet1DModel
 from ...pipelines import DiffusionPipeline
+from ...utils import randn_tensor
 from ...utils.dummy_pt_objects import DDPMScheduler
 
 
@@ -127,7 +128,7 @@ class ValueGuidedRLPipeline(DiffusionPipeline):
         shape = (batch_size, planning_horizon, self.state_dim + self.action_dim)
 
         # generate initial noise and apply our conditions (to make the trajectories start at current state)
-        x1 = torch.randn(shape, device=self.unet.device)
+        x1 = randn_tensor(shape, device=self.unet.device)
         x = self.reset_x0(x1, conditions, self.action_dim)
         x = self.to_torch(x)
 

src/diffusers/models/prior_transformer.py

@@ -95,7 +95,7 @@ class PriorTransformer(ModelMixin, ConfigMixin):
         self.proj_to_clip_embeddings = nn.Linear(inner_dim, embedding_dim)
 
         causal_attention_mask = torch.full(
-            [num_embeddings + additional_embeddings, num_embeddings + additional_embeddings], float("-inf")
+            [num_embeddings + additional_embeddings, num_embeddings + additional_embeddings], -10000.0
         )
         causal_attention_mask.triu_(1)
         causal_attention_mask = causal_attention_mask[None, ...]

src/diffusers/models/vae.py

@@ -18,7 +18,7 @@ import numpy as np
 import torch
 import torch.nn as nn
 
-from ..utils import BaseOutput
+from ..utils import BaseOutput, randn_tensor
 from .unet_2d_blocks import UNetMidBlock2D, get_down_block, get_up_block
 
 
@@ -323,11 +323,10 @@ class DiagonalGaussianDistribution(object):
             )
 
     def sample(self, generator: Optional[torch.Generator] = None) -> torch.FloatTensor:
-        device = self.parameters.device
-        sample_device = "cpu" if device.type == "mps" else device
-        sample = torch.randn(self.mean.shape, generator=generator, device=sample_device)
         # make sure sample is on the same device as the parameters and has same dtype
-        sample = sample.to(device=device, dtype=self.parameters.dtype)
+        sample = randn_tensor(
+            self.mean.shape, generator=generator, device=self.parameters.device, dtype=self.parameters.dtype
+        )
         x = self.mean + self.std * sample
         return x
 

src/diffusers/pipelines/alt_diffusion/pipeline_alt_diffusion.py

@@ -31,7 +31,7 @@ from ...schedulers import (
     LMSDiscreteScheduler,
     PNDMScheduler,
 )
-from ...utils import deprecate, logging, replace_example_docstring
+from ...utils import deprecate, logging, randn_tensor, replace_example_docstring
 from ..pipeline_utils import DiffusionPipeline
 from ..stable_diffusion.safety_checker import StableDiffusionSafetyChecker
 from . import AltDiffusionPipelineOutput, RobertaSeriesModelWithTransformation
@@ -401,20 +401,8 @@ class AltDiffusionPipeline(DiffusionPipeline):
             )
 
         if latents is None:
-            rand_device = "cpu" if device.type == "mps" else device
+            latents = randn_tensor(shape, generator=generator, device=device, dtype=dtype)
-
-            if isinstance(generator, list):
-                shape = (1,) + shape[1:]
-                latents = [
-                    torch.randn(shape, generator=generator[i], device=rand_device, dtype=dtype)
-                    for i in range(batch_size)
-                ]
-                latents = torch.cat(latents, dim=0).to(device)
         else:
-                latents = torch.randn(shape, generator=generator, device=rand_device, dtype=dtype).to(device)
-        else:
-            if latents.shape != shape:
-                raise ValueError(f"Unexpected latents shape, got {latents.shape}, expected {shape}")
             latents = latents.to(device)
 
         # scale the initial noise by the standard deviation required by the scheduler

src/diffusers/pipelines/alt_diffusion/pipeline_alt_diffusion_img2img.py

@@ -33,7 +33,7 @@ from ...schedulers import (
     LMSDiscreteScheduler,
     PNDMScheduler,
 )
-from ...utils import PIL_INTERPOLATION, deprecate, logging, replace_example_docstring
+from ...utils import PIL_INTERPOLATION, deprecate, logging, randn_tensor, replace_example_docstring
 from ..pipeline_utils import DiffusionPipeline
 from ..stable_diffusion.safety_checker import StableDiffusionSafetyChecker
 from . import AltDiffusionPipelineOutput, RobertaSeriesModelWithTransformation
@@ -461,16 +461,8 @@ class AltDiffusionImg2ImgPipeline(DiffusionPipeline):
         else:
             init_latents = torch.cat([init_latents], dim=0)
 
-        rand_device = "cpu" if device.type == "mps" else device
         shape = init_latents.shape
-        if isinstance(generator, list):
+        noise = randn_tensor(shape, generator=generator, device=device, dtype=dtype)
-            shape = (1,) + shape[1:]
-            noise = [
-                torch.randn(shape, generator=generator[i], device=rand_device, dtype=dtype) for i in range(batch_size)
-            ]
-            noise = torch.cat(noise, dim=0).to(device)
-        else:
-            noise = torch.randn(shape, generator=generator, device=rand_device, dtype=dtype).to(device)
 
         # get latents
         init_latents = self.scheduler.add_noise(init_latents, noise, timestep)

src/diffusers/pipelines/audio_diffusion/pipeline_audio_diffusion.py

@@ -23,6 +23,7 @@ from PIL import Image
 
 from ...models import AutoencoderKL, UNet2DConditionModel
 from ...schedulers import DDIMScheduler, DDPMScheduler
+from ...utils import randn_tensor
 from ..pipeline_utils import AudioPipelineOutput, BaseOutput, DiffusionPipeline, ImagePipelineOutput
 from .mel import Mel
 
@@ -126,7 +127,7 @@ class AudioDiffusionPipeline(DiffusionPipeline):
         input_dims = self.get_input_dims()
         self.mel.set_resolution(x_res=input_dims[1], y_res=input_dims[0])
         if noise is None:
-            noise = torch.randn(
+            noise = randn_tensor(
                 (
                     batch_size,
                     self.unet.in_channels,

src/diffusers/pipelines/dance_diffusion/pipeline_dance_diffusion.py

@@ -17,7 +17,7 @@ from typing import List, Optional, Tuple, Union
 
 import torch
 
-from ...utils import logging
+from ...utils import logging, randn_tensor
 from ..pipeline_utils import AudioPipelineOutput, DiffusionPipeline
 
 
@@ -100,16 +100,7 @@ class DanceDiffusionPipeline(DiffusionPipeline):
                 f" size of {batch_size}. Make sure the batch size matches the length of the generators."
             )
 
-        rand_device = "cpu" if self.device.type == "mps" else self.device
+        audio = randn_tensor(shape, generator=generator, device=self.device, dtype=dtype)
-        if isinstance(generator, list):
-            shape = (1,) + shape[1:]
-            audio = [
-                torch.randn(shape, generator=generator[i], device=rand_device, dtype=self.unet.dtype)
-                for i in range(batch_size)
-            ]
-            audio = torch.cat(audio, dim=0).to(self.device)
-        else:
-            audio = torch.randn(shape, generator=generator, device=rand_device, dtype=dtype).to(self.device)
 
         # set step values
         self.scheduler.set_timesteps(num_inference_steps, device=audio.device)

src/diffusers/pipelines/ddim/pipeline_ddim.py

@@ -16,7 +16,7 @@ from typing import List, Optional, Tuple, Union
 
 import torch
 
-from ...utils import deprecate
+from ...utils import deprecate, randn_tensor
 from ..pipeline_utils import DiffusionPipeline, ImagePipelineOutput
 
 
@@ -103,17 +103,7 @@ class DDIMPipeline(DiffusionPipeline):
                 f" size of {batch_size}. Make sure the batch size matches the length of the generators."
             )
 
-        rand_device = "cpu" if self.device.type == "mps" else self.device
+        image = randn_tensor(image_shape, generator=generator, device=self.device, dtype=self.unet.dtype)
-        if isinstance(generator, list):
-            shape = (1,) + image_shape[1:]
-            image = [
-                torch.randn(shape, generator=generator[i], device=rand_device, dtype=self.unet.dtype)
-                for i in range(batch_size)
-            ]
-            image = torch.cat(image, dim=0).to(self.device)
-        else:
-            image = torch.randn(image_shape, generator=generator, device=rand_device, dtype=self.unet.dtype)
-            image = image.to(self.device)
 
         # set step values
         self.scheduler.set_timesteps(num_inference_steps)

src/diffusers/pipelines/ddpm/pipeline_ddpm.py

@@ -18,7 +18,7 @@ from typing import List, Optional, Tuple, Union
 import torch
 
 from ...configuration_utils import FrozenDict
-from ...utils import deprecate
+from ...utils import deprecate, randn_tensor
 from ..pipeline_utils import DiffusionPipeline, ImagePipelineOutput
 
 
@@ -100,10 +100,10 @@ class DDPMPipeline(DiffusionPipeline):
 
         if self.device.type == "mps":
             # randn does not work reproducibly on mps
-            image = torch.randn(image_shape, generator=generator)
+            image = randn_tensor(image_shape, generator=generator)
             image = image.to(self.device)
         else:
-            image = torch.randn(image_shape, generator=generator, device=self.device)
+            image = randn_tensor(image_shape, generator=generator, device=self.device)
 
         # set step values
         self.scheduler.set_timesteps(num_inference_steps)

src/diffusers/pipelines/latent_diffusion/pipeline_latent_diffusion.py

@@ -26,6 +26,7 @@ from transformers.utils import logging
 
 from ...models import AutoencoderKL, UNet2DConditionModel, UNet2DModel, VQModel
 from ...schedulers import DDIMScheduler, LMSDiscreteScheduler, PNDMScheduler
+from ...utils import randn_tensor
 from ..pipeline_utils import DiffusionPipeline, ImagePipelineOutput
 
 
@@ -143,20 +144,7 @@ class LDMTextToImagePipeline(DiffusionPipeline):
             )
 
         if latents is None:
-            rand_device = "cpu" if self.device.type == "mps" else self.device
+            latents = randn_tensor(latents_shape, generator=generator, device=self.device, dtype=text_embeddings.dtype)
-
-            if isinstance(generator, list):
-                latents_shape = (1,) + latents_shape[1:]
-                latents = [
-                    torch.randn(latents_shape, generator=generator[i], device=rand_device, dtype=text_embeddings.dtype)
-                    for i in range(batch_size)
-                ]
-                latents = torch.cat(latents, dim=0)
-            else:
-                latents = torch.randn(
-                    latents_shape, generator=generator, device=rand_device, dtype=text_embeddings.dtype
-                )
-            latents = latents.to(self.device)
         else:
             if latents.shape != latents_shape:
                 raise ValueError(f"Unexpected latents shape, got {latents.shape}, expected {latents_shape}")

src/diffusers/pipelines/latent_diffusion/pipeline_latent_diffusion_superresolution.py

@@ -16,7 +16,7 @@ from ...schedulers import (
     LMSDiscreteScheduler,
     PNDMScheduler,
 )
-from ...utils import PIL_INTERPOLATION, deprecate
+from ...utils import PIL_INTERPOLATION, deprecate, randn_tensor
 from ..pipeline_utils import DiffusionPipeline, ImagePipelineOutput
 
 
@@ -121,12 +121,7 @@ class LDMSuperResolutionPipeline(DiffusionPipeline):
         latents_shape = (batch_size, self.unet.in_channels // 2, height, width)
         latents_dtype = next(self.unet.parameters()).dtype
 
-        if self.device.type == "mps":
+        latents = randn_tensor(latents_shape, generator=generator, device=self.device, dtype=latents_dtype)
-            # randn does not work reproducibly on mps
-            latents = torch.randn(latents_shape, generator=generator, device="cpu", dtype=latents_dtype)
-            latents = latents.to(self.device)
-        else:
-            latents = torch.randn(latents_shape, generator=generator, device=self.device, dtype=latents_dtype)
 
         image = image.to(device=self.device, dtype=latents_dtype)
 

src/diffusers/pipelines/latent_diffusion_uncond/pipeline_latent_diffusion_uncond.py

@@ -19,6 +19,7 @@ import torch
 
 from ...models import UNet2DModel, VQModel
 from ...schedulers import DDIMScheduler
+from ...utils import randn_tensor
 from ..pipeline_utils import DiffusionPipeline, ImagePipelineOutput
 
 
@@ -71,7 +72,7 @@ class LDMPipeline(DiffusionPipeline):
             True, otherwise a `tuple. When returning a tuple, the first element is a list with the generated images.
         """
 
-        latents = torch.randn(
+        latents = randn_tensor(
             (batch_size, self.unet.in_channels, self.unet.sample_size, self.unet.sample_size),
             generator=generator,
         )

src/diffusers/pipelines/paint_by_example/image_encoder.py

@@ -34,7 +34,7 @@ class PaintByExampleImageEncoder(CLIPPreTrainedModel):
         self.proj_out = nn.Linear(config.hidden_size, self.proj_size)
 
         # uncondition for scaling
-        self.uncond_vector = nn.Parameter(torch.rand((1, 1, self.proj_size)))
+        self.uncond_vector = nn.Parameter(torch.randn((1, 1, self.proj_size)))
 
     def forward(self, pixel_values):
         clip_output = self.model(pixel_values=pixel_values)

src/diffusers/pipelines/paint_by_example/pipeline_paint_by_example.py

@@ -24,7 +24,7 @@ from transformers import CLIPFeatureExtractor
 
 from ...models import AutoencoderKL, UNet2DConditionModel
 from ...schedulers import DDIMScheduler, LMSDiscreteScheduler, PNDMScheduler
-from ...utils import logging
+from ...utils import logging, randn_tensor
 from ..pipeline_utils import DiffusionPipeline
 from ..stable_diffusion import StableDiffusionPipelineOutput
 from ..stable_diffusion.safety_checker import StableDiffusionSafetyChecker
@@ -300,20 +300,8 @@ class PaintByExamplePipeline(DiffusionPipeline):
             )
 
         if latents is None:
-            rand_device = "cpu" if device.type == "mps" else device
+            latents = randn_tensor(shape, generator=generator, device=device, dtype=dtype)
-
-            if isinstance(generator, list):
-                shape = (1,) + shape[1:]
-                latents = [
-                    torch.randn(shape, generator=generator[i], device=rand_device, dtype=dtype)
-                    for i in range(batch_size)
-                ]
-                latents = torch.cat(latents, dim=0).to(device)
         else:
-                latents = torch.randn(shape, generator=generator, device=rand_device, dtype=dtype).to(device)
-        else:
-            if latents.shape != shape:
-                raise ValueError(f"Unexpected latents shape, got {latents.shape}, expected {shape}")
             latents = latents.to(device)
 
         # scale the initial noise by the standard deviation required by the scheduler

src/diffusers/pipelines/pndm/pipeline_pndm.py

@@ -19,6 +19,7 @@ import torch
 
 from ...models import UNet2DModel
 from ...schedulers import PNDMScheduler
+from ...utils import randn_tensor
 from ..pipeline_utils import DiffusionPipeline, ImagePipelineOutput
 
 
@@ -72,11 +73,11 @@ class PNDMPipeline(DiffusionPipeline):
         # the official paper: https://arxiv.org/pdf/2202.09778.pdf
 
         # Sample gaussian noise to begin loop
-        image = torch.randn(
+        image = randn_tensor(
             (batch_size, self.unet.in_channels, self.unet.sample_size, self.unet.sample_size),
             generator=generator,
+            device=self.device,
         )
-        image = image.to(self.device)
 
         self.scheduler.set_timesteps(num_inference_steps)
         for t in self.progress_bar(self.scheduler.timesteps):

src/diffusers/pipelines/repaint/pipeline_repaint.py

@@ -22,7 +22,7 @@ import PIL
 
 from ...models import UNet2DModel
 from ...schedulers import RePaintScheduler
-from ...utils import PIL_INTERPOLATION, deprecate, logging
+from ...utils import PIL_INTERPOLATION, deprecate, logging, randn_tensor
 from ..pipeline_utils import DiffusionPipeline, ImagePipelineOutput
 
 
@@ -143,18 +143,8 @@ class RePaintPipeline(DiffusionPipeline):
                 f" size of {batch_size}. Make sure the batch size matches the length of the generators."
             )
 
-        rand_device = "cpu" if self.device.type == "mps" else self.device
         image_shape = original_image.shape
-        if isinstance(generator, list):
+        image = randn_tensor(image_shape, generator=generator, device=self.device, dtype=self.unet.dtype)
-            shape = (1,) + image_shape[1:]
-            image = [
-                torch.randn(shape, generator=generator[i], device=rand_device, dtype=self.unet.dtype)
-                for i in range(batch_size)
-            ]
-            image = torch.cat(image, dim=0).to(self.device)
-        else:
-            image = torch.randn(image_shape, generator=generator, device=rand_device, dtype=self.unet.dtype)
-            image = image.to(self.device)
 
         # set step values
         self.scheduler.set_timesteps(num_inference_steps, jump_length, jump_n_sample, self.device)

src/diffusers/pipelines/score_sde_ve/pipeline_score_sde_ve.py

@@ -18,6 +18,7 @@ import torch
 
 from ...models import UNet2DModel
 from ...schedulers import ScoreSdeVeScheduler
+from ...utils import randn_tensor
 from ..pipeline_utils import DiffusionPipeline, ImagePipelineOutput
 
 
@@ -69,7 +70,7 @@ class ScoreSdeVePipeline(DiffusionPipeline):
 
         model = self.unet
 
-        sample = torch.randn(*shape, generator=generator) * self.scheduler.init_noise_sigma
+        sample = randn_tensor(shape, generator=generator) * self.scheduler.init_noise_sigma
         sample = sample.to(self.device)
 
         self.scheduler.set_timesteps(num_inference_steps)

src/diffusers/pipelines/stable_diffusion/pipeline_cycle_diffusion.py

@@ -26,7 +26,7 @@ from transformers import CLIPFeatureExtractor, CLIPTextModel, CLIPTokenizer
 from ...configuration_utils import FrozenDict
 from ...models import AutoencoderKL, UNet2DConditionModel
 from ...schedulers import DDIMScheduler
-from ...utils import PIL_INTERPOLATION, deprecate, logging
+from ...utils import PIL_INTERPOLATION, deprecate, logging, randn_tensor
 from ..pipeline_utils import DiffusionPipeline
 from . import StableDiffusionPipelineOutput
 from .safety_checker import StableDiffusionSafetyChecker
@@ -76,7 +76,7 @@ def posterior_sample(scheduler, latents, timestep, clean_latents, generator, eta
     # direction pointing to x_t
     e_t = (latents - alpha_prod_t ** (0.5) * clean_latents) / (1 - alpha_prod_t) ** (0.5)
     dir_xt = (1.0 - alpha_prod_t_prev - std_dev_t**2) ** (0.5) * e_t
-    noise = std_dev_t * torch.randn(
+    noise = std_dev_t * randn_tensor(
         clean_latents.shape, dtype=clean_latents.dtype, device=clean_latents.device, generator=generator
     )
     prev_latents = alpha_prod_t_prev ** (0.5) * clean_latents + dir_xt + noise
@@ -472,16 +472,8 @@ class CycleDiffusionPipeline(DiffusionPipeline):
             init_latents = torch.cat([init_latents] * num_images_per_prompt, dim=0)
 
         # add noise to latents using the timestep
-        rand_device = "cpu" if device.type == "mps" else device
         shape = init_latents.shape
-        if isinstance(generator, list):
+        noise = randn_tensor(shape, generator=generator, device=device, dtype=dtype)
-            shape = (1,) + shape[1:]
-            noise = [
-                torch.randn(shape, generator=generator[i], device=rand_device, dtype=dtype) for i in range(batch_size)
-            ]
-            noise = torch.cat(noise, dim=0).to(device)
-        else:
-            noise = torch.randn(shape, generator=generator, device=rand_device, dtype=dtype).to(device)
 
         # get latents
         clean_latents = init_latents

src/diffusers/pipelines/stable_diffusion/pipeline_stable_diffusion.py

@@ -30,7 +30,7 @@ from ...schedulers import (
     LMSDiscreteScheduler,
     PNDMScheduler,
 )
-from ...utils import deprecate, is_accelerate_available, logging, replace_example_docstring
+from ...utils import deprecate, is_accelerate_available, logging, randn_tensor, replace_example_docstring
 from ..pipeline_utils import DiffusionPipeline
 from . import StableDiffusionPipelineOutput
 from .safety_checker import StableDiffusionSafetyChecker
@@ -398,20 +398,8 @@ class StableDiffusionPipeline(DiffusionPipeline):
             )
 
         if latents is None:
-            rand_device = "cpu" if device.type == "mps" else device
+            latents = randn_tensor(shape, generator=generator, device=device, dtype=dtype)
-
-            if isinstance(generator, list):
-                shape = (1,) + shape[1:]
-                latents = [
-                    torch.randn(shape, generator=generator[i], device=rand_device, dtype=dtype)
-                    for i in range(batch_size)
-                ]
-                latents = torch.cat(latents, dim=0).to(device)
         else:
-                latents = torch.randn(shape, generator=generator, device=rand_device, dtype=dtype).to(device)
-        else:
-            if latents.shape != shape:
-                raise ValueError(f"Unexpected latents shape, got {latents.shape}, expected {shape}")
             latents = latents.to(device)
 
         # scale the initial noise by the standard deviation required by the scheduler

src/diffusers/pipelines/stable_diffusion/pipeline_stable_diffusion_depth2img.py

@@ -20,7 +20,6 @@ import numpy as np
 import torch
 
 import PIL
-from diffusers.utils import is_accelerate_available
 from packaging import version
 from transformers import CLIPTextModel, CLIPTokenizer, DPTFeatureExtractor, DPTForDepthEstimation
 
@@ -34,7 +33,7 @@ from ...schedulers import (
     LMSDiscreteScheduler,
     PNDMScheduler,
 )
-from ...utils import PIL_INTERPOLATION, deprecate, logging
+from ...utils import PIL_INTERPOLATION, deprecate, is_accelerate_available, logging, randn_tensor
 from ..pipeline_utils import DiffusionPipeline, ImagePipelineOutput
 
 
@@ -381,16 +380,8 @@ class StableDiffusionDepth2ImgPipeline(DiffusionPipeline):
         else:
             init_latents = torch.cat([init_latents], dim=0)
 
-        rand_device = "cpu" if device.type == "mps" else device
         shape = init_latents.shape
-        if isinstance(generator, list):
+        noise = randn_tensor(shape, generator=generator, device=device, dtype=dtype)
-            shape = (1,) + shape[1:]
-            noise = [
-                torch.randn(shape, generator=generator[i], device=rand_device, dtype=dtype) for i in range(batch_size)
-            ]
-            noise = torch.cat(noise, dim=0).to(device)
-        else:
-            noise = torch.randn(shape, generator=generator, device=rand_device, dtype=dtype).to(device)
 
         # get latents
         init_latents = self.scheduler.add_noise(init_latents, noise, timestep)

src/diffusers/pipelines/stable_diffusion/pipeline_stable_diffusion_image_variation.py

@@ -18,7 +18,6 @@ from typing import Callable, List, Optional, Union
 import torch
 
 import PIL
-from diffusers.utils import is_accelerate_available
 from packaging import version
 from transformers import CLIPFeatureExtractor, CLIPVisionModelWithProjection
 
@@ -32,7 +31,7 @@ from ...schedulers import (
     LMSDiscreteScheduler,
     PNDMScheduler,
 )
-from ...utils import deprecate, logging
+from ...utils import deprecate, is_accelerate_available, logging, randn_tensor
 from ..pipeline_utils import DiffusionPipeline
 from . import StableDiffusionPipelineOutput
 from .safety_checker import StableDiffusionSafetyChecker
@@ -267,20 +266,8 @@ class StableDiffusionImageVariationPipeline(DiffusionPipeline):
             )
 
         if latents is None:
-            rand_device = "cpu" if device.type == "mps" else device
+            latents = randn_tensor(shape, generator=generator, device=device, dtype=dtype)
-
-            if isinstance(generator, list):
-                shape = (1,) + shape[1:]
-                latents = [
-                    torch.randn(shape, generator=generator[i], device=rand_device, dtype=dtype)
-                    for i in range(batch_size)
-                ]
-                latents = torch.cat(latents, dim=0).to(device)
         else:
-                latents = torch.randn(shape, generator=generator, device=rand_device, dtype=dtype).to(device)
-        else:
-            if latents.shape != shape:
-                raise ValueError(f"Unexpected latents shape, got {latents.shape}, expected {shape}")
             latents = latents.to(device)
 
         # scale the initial noise by the standard deviation required by the scheduler

src/diffusers/pipelines/stable_diffusion/pipeline_stable_diffusion_img2img.py

@@ -32,7 +32,14 @@ from ...schedulers import (
     LMSDiscreteScheduler,
     PNDMScheduler,
 )
-from ...utils import PIL_INTERPOLATION, deprecate, is_accelerate_available, logging, replace_example_docstring
+from ...utils import (
+    PIL_INTERPOLATION,
+    deprecate,
+    is_accelerate_available,
+    logging,
+    randn_tensor,
+    replace_example_docstring,
+)
 from ..pipeline_utils import DiffusionPipeline
 from . import StableDiffusionPipelineOutput
 from .safety_checker import StableDiffusionSafetyChecker
@@ -464,16 +471,8 @@ class StableDiffusionImg2ImgPipeline(DiffusionPipeline):
         else:
             init_latents = torch.cat([init_latents], dim=0)
 
-        rand_device = "cpu" if device.type == "mps" else device
         shape = init_latents.shape
-        if isinstance(generator, list):
+        noise = randn_tensor(shape, generator=generator, device=device, dtype=dtype)
-            shape = (1,) + shape[1:]
-            noise = [
-                torch.randn(shape, generator=generator[i], device=rand_device, dtype=dtype) for i in range(batch_size)
-            ]
-            noise = torch.cat(noise, dim=0).to(device)
-        else:
-            noise = torch.randn(shape, generator=generator, device=rand_device, dtype=dtype).to(device)
 
         # get latents
         init_latents = self.scheduler.add_noise(init_latents, noise, timestep)

src/diffusers/pipelines/stable_diffusion/pipeline_stable_diffusion_inpaint.py

@@ -19,14 +19,13 @@ import numpy as np
 import torch
 
 import PIL
-from diffusers.utils import is_accelerate_available
 from packaging import version
 from transformers import CLIPFeatureExtractor, CLIPTextModel, CLIPTokenizer
 
 from ...configuration_utils import FrozenDict
 from ...models import AutoencoderKL, UNet2DConditionModel
 from ...schedulers import DDIMScheduler, LMSDiscreteScheduler, PNDMScheduler
-from ...utils import deprecate, logging
+from ...utils import deprecate, is_accelerate_available, logging, randn_tensor
 from ..pipeline_utils import DiffusionPipeline
 from . import StableDiffusionPipelineOutput
 from .safety_checker import StableDiffusionSafetyChecker
@@ -470,20 +469,8 @@ class StableDiffusionInpaintPipeline(DiffusionPipeline):
             )
 
         if latents is None:
-            rand_device = "cpu" if device.type == "mps" else device
+            latents = randn_tensor(shape, generator=generator, device=device, dtype=dtype)
-
-            if isinstance(generator, list):
-                shape = (1,) + shape[1:]
-                latents = [
-                    torch.randn(shape, generator=generator[i], device=rand_device, dtype=dtype)
-                    for i in range(batch_size)
-                ]
-                latents = torch.cat(latents, dim=0).to(device)
         else:
-                latents = torch.randn(shape, generator=generator, device=rand_device, dtype=dtype).to(device)
-        else:
-            if latents.shape != shape:
-                raise ValueError(f"Unexpected latents shape, got {latents.shape}, expected {shape}")
             latents = latents.to(device)
 
         # scale the initial noise by the standard deviation required by the scheduler

src/diffusers/pipelines/stable_diffusion/pipeline_stable_diffusion_inpaint_legacy.py

@@ -19,7 +19,6 @@ import numpy as np
 import torch
 
 import PIL
-from diffusers.utils import is_accelerate_available
 from packaging import version
 from transformers import CLIPFeatureExtractor, CLIPTextModel, CLIPTokenizer
 
@@ -33,7 +32,7 @@ from ...schedulers import (
     LMSDiscreteScheduler,
     PNDMScheduler,
 )
-from ...utils import PIL_INTERPOLATION, deprecate, logging
+from ...utils import PIL_INTERPOLATION, deprecate, is_accelerate_available, logging, randn_tensor
 from ..pipeline_utils import DiffusionPipeline
 from . import StableDiffusionPipelineOutput
 from .safety_checker import StableDiffusionSafetyChecker
@@ -414,7 +413,7 @@ class StableDiffusionInpaintPipelineLegacy(DiffusionPipeline):
         init_latents_orig = init_latents
 
         # add noise to latents using the timesteps
-        noise = torch.randn(init_latents.shape, generator=generator, device=self.device, dtype=dtype)
+        noise = randn_tensor(init_latents.shape, generator=generator, device=self.device, dtype=dtype)
         init_latents = self.scheduler.add_noise(init_latents, noise, timestep)
         latents = init_latents
         return latents, init_latents_orig, noise

src/diffusers/pipelines/stable_diffusion/pipeline_stable_diffusion_k_diffusion.py

@@ -21,7 +21,7 @@ from k_diffusion.external import CompVisDenoiser, CompVisVDenoiser
 
 from ...pipelines import DiffusionPipeline
 from ...schedulers import LMSDiscreteScheduler
-from ...utils import is_accelerate_available, logging
+from ...utils import is_accelerate_available, logging, randn_tensor
 from . import StableDiffusionPipelineOutput
 
 
@@ -308,11 +308,7 @@ class StableDiffusionKDiffusionPipeline(DiffusionPipeline):
     def prepare_latents(self, batch_size, num_channels_latents, height, width, dtype, device, generator, latents=None):
         shape = (batch_size, num_channels_latents, height // self.vae_scale_factor, width // self.vae_scale_factor)
         if latents is None:
-            if device.type == "mps":
+            latents = randn_tensor(shape, generator=generator, device=device, dtype=dtype)
-                # randn does not work reproducibly on mps
-                latents = torch.randn(shape, generator=generator, device="cpu", dtype=dtype).to(device)
-            else:
-                latents = torch.randn(shape, generator=generator, device=device, dtype=dtype)
         else:
             if latents.shape != shape:
                 raise ValueError(f"Unexpected latents shape, got {latents.shape}, expected {shape}")

src/diffusers/pipelines/stable_diffusion/pipeline_stable_diffusion_upscale.py

@@ -19,12 +19,11 @@ import numpy as np
 import torch
 
 import PIL
-from diffusers.utils import is_accelerate_available
 from transformers import CLIPTextModel, CLIPTokenizer
 
 from ...models import AutoencoderKL, UNet2DConditionModel
 from ...schedulers import DDIMScheduler, DDPMScheduler, LMSDiscreteScheduler, PNDMScheduler
-from ...utils import logging
+from ...utils import is_accelerate_available, logging, randn_tensor
 from ..pipeline_utils import DiffusionPipeline, ImagePipelineOutput
 
 
@@ -313,11 +312,7 @@ class StableDiffusionUpscalePipeline(DiffusionPipeline):
     def prepare_latents(self, batch_size, num_channels_latents, height, width, dtype, device, generator, latents=None):
         shape = (batch_size, num_channels_latents, height, width)
         if latents is None:
-            if device.type == "mps":
+            latents = randn_tensor(shape, generator=generator, device=device, dtype=dtype)
-                # randn does not work reproducibly on mps
-                latents = torch.randn(shape, generator=generator, device="cpu", dtype=dtype).to(device)
-            else:
-                latents = torch.randn(shape, generator=generator, device=device, dtype=dtype)
         else:
             if latents.shape != shape:
                 raise ValueError(f"Unexpected latents shape, got {latents.shape}, expected {shape}")
@@ -450,11 +445,7 @@ class StableDiffusionUpscalePipeline(DiffusionPipeline):
 
         # 5. Add noise to image
         noise_level = torch.tensor([noise_level], dtype=torch.long, device=device)
-        if device.type == "mps":
+        noise = randn_tensor(image.shape, generator=generator, device=device, dtype=text_embeddings.dtype)
-            # randn does not work reproducibly on mps
-            noise = torch.randn(image.shape, generator=generator, device="cpu", dtype=text_embeddings.dtype).to(device)
-        else:
-            noise = torch.randn(image.shape, generator=generator, device=device, dtype=text_embeddings.dtype)
         image = self.low_res_scheduler.add_noise(image, noise, noise_level)
 
         batch_multiplier = 2 if do_classifier_free_guidance else 1

src/diffusers/pipelines/stable_diffusion_safe/pipeline_stable_diffusion_safe.py

@@ -18,7 +18,7 @@ from ...schedulers import (
     LMSDiscreteScheduler,
     PNDMScheduler,
 )
-from ...utils import deprecate, is_accelerate_available, logging
+from ...utils import deprecate, is_accelerate_available, logging, randn_tensor
 from ..pipeline_utils import DiffusionPipeline
 from . import StableDiffusionSafePipelineOutput
 from .safety_checker import SafeStableDiffusionSafetyChecker
@@ -429,20 +429,8 @@ class StableDiffusionPipelineSafe(DiffusionPipeline):
             )
 
         if latents is None:
-            rand_device = "cpu" if device.type == "mps" else device
+            latents = randn_tensor(shape, generator=generator, device=device, dtype=dtype)
-
-            if isinstance(generator, list):
-                shape = (1,) + shape[1:]
-                latents = [
-                    torch.randn(shape, generator=generator[i], device=rand_device, dtype=dtype)
-                    for i in range(batch_size)
-                ]
-                latents = torch.cat(latents, dim=0).to(device)
         else:
-                latents = torch.randn(shape, generator=generator, device=rand_device, dtype=dtype).to(device)
-        else:
-            if latents.shape != shape:
-                raise ValueError(f"Unexpected latents shape, got {latents.shape}, expected {shape}")
             latents = latents.to(device)
 
         # scale the initial noise by the standard deviation required by the scheduler

src/diffusers/pipelines/stochastic_karras_ve/pipeline_stochastic_karras_ve.py

@@ -18,6 +18,7 @@ import torch
 
 from ...models import UNet2DModel
 from ...schedulers import KarrasVeScheduler
+from ...utils import randn_tensor
 from ..pipeline_utils import DiffusionPipeline, ImagePipelineOutput
 
 
@@ -81,8 +82,7 @@ class KarrasVePipeline(DiffusionPipeline):
         model = self.unet
 
         # sample x_0 ~ N(0, sigma_0^2 * I)
-        sample = torch.randn(*shape) * self.scheduler.init_noise_sigma
+        sample = randn_tensor(shape, device=self.device) * self.scheduler.init_noise_sigma
-        sample = sample.to(self.device)
 
         self.scheduler.set_timesteps(num_inference_steps)
 

src/diffusers/pipelines/unclip/pipeline_unclip.py

@@ -24,7 +24,7 @@ from transformers.models.clip.modeling_clip import CLIPTextModelOutput
 from ...models import PriorTransformer, UNet2DConditionModel, UNet2DModel
 from ...pipelines import DiffusionPipeline, ImagePipelineOutput
 from ...schedulers import UnCLIPScheduler
-from ...utils import is_accelerate_available, logging, torch_randn
+from ...utils import is_accelerate_available, logging, randn_tensor
 from .text_proj import UnCLIPTextProjModel
 
 
@@ -105,7 +105,7 @@ class UnCLIPPipeline(DiffusionPipeline):
 
     def prepare_latents(self, shape, dtype, device, generator, latents, scheduler):
         if latents is None:
-            latents = torch_randn(shape, generator=generator, device=device, dtype=dtype)
+            latents = randn_tensor(shape, generator=generator, device=device, dtype=dtype)
         else:
             if latents.shape != shape:
                 raise ValueError(f"Unexpected latents shape, got {latents.shape}, expected {shape}")
@@ -499,7 +499,6 @@ class UnCLIPPipeline(DiffusionPipeline):
             ).prev_sample
 
         image = super_res_latents
-
         # done super res
 
         # post processing

src/diffusers/pipelines/unclip/pipeline_unclip_image_variation.py

@@ -29,7 +29,7 @@ from transformers import (
 from ...models import UNet2DConditionModel, UNet2DModel
 from ...pipelines import DiffusionPipeline, ImagePipelineOutput
 from ...schedulers import UnCLIPScheduler
-from ...utils import is_accelerate_available, logging, torch_randn
+from ...utils import is_accelerate_available, logging, randn_tensor
 from .text_proj import UnCLIPTextProjModel
 
 
@@ -113,7 +113,7 @@ class UnCLIPImageVariationPipeline(DiffusionPipeline):
     # Copied from diffusers.pipelines.unclip.pipeline_unclip.UnCLIPPipeline.prepare_latents
     def prepare_latents(self, shape, dtype, device, generator, latents, scheduler):
         if latents is None:
-            latents = torch_randn(shape, generator=generator, device=device, dtype=dtype)
+            latents = randn_tensor(shape, generator=generator, device=device, dtype=dtype)
         else:
             if latents.shape != shape:
                 raise ValueError(f"Unexpected latents shape, got {latents.shape}, expected {shape}")

src/diffusers/pipelines/versatile_diffusion/pipeline_versatile_diffusion_dual_guided.py

@@ -29,7 +29,7 @@ from transformers import (
 
 from ...models import AutoencoderKL, DualTransformer2DModel, Transformer2DModel, UNet2DConditionModel
 from ...schedulers import DDIMScheduler, LMSDiscreteScheduler, PNDMScheduler
-from ...utils import is_accelerate_available, logging
+from ...utils import is_accelerate_available, logging, randn_tensor
 from ..pipeline_utils import DiffusionPipeline, ImagePipelineOutput
 from .modeling_text_unet import UNetFlatConditionModel
 
@@ -382,20 +382,8 @@ class VersatileDiffusionDualGuidedPipeline(DiffusionPipeline):
             )
 
         if latents is None:
-            rand_device = "cpu" if device.type == "mps" else device
+            latents = randn_tensor(shape, generator=generator, device=device, dtype=dtype)
-
-            if isinstance(generator, list):
-                shape = (1,) + shape[1:]
-                latents = [
-                    torch.randn(shape, generator=generator[i], device=rand_device, dtype=dtype)
-                    for i in range(batch_size)
-                ]
-                latents = torch.cat(latents, dim=0).to(device)
         else:
-                latents = torch.randn(shape, generator=generator, device=rand_device, dtype=dtype).to(device)
-        else:
-            if latents.shape != shape:
-                raise ValueError(f"Unexpected latents shape, got {latents.shape}, expected {shape}")
             latents = latents.to(device)
 
         # scale the initial noise by the standard deviation required by the scheduler

src/diffusers/pipelines/versatile_diffusion/pipeline_versatile_diffusion_image_variation.py

@@ -24,7 +24,7 @@ from transformers import CLIPFeatureExtractor, CLIPVisionModelWithProjection
 
 from ...models import AutoencoderKL, UNet2DConditionModel
 from ...schedulers import DDIMScheduler, LMSDiscreteScheduler, PNDMScheduler
-from ...utils import is_accelerate_available, logging
+from ...utils import is_accelerate_available, logging, randn_tensor
 from ..pipeline_utils import DiffusionPipeline, ImagePipelineOutput
 
 
@@ -248,20 +248,8 @@ class VersatileDiffusionImageVariationPipeline(DiffusionPipeline):
             )
 
         if latents is None:
-            rand_device = "cpu" if device.type == "mps" else device
+            latents = randn_tensor(shape, generator=generator, device=device, dtype=dtype)
-
-            if isinstance(generator, list):
-                shape = (1,) + shape[1:]
-                latents = [
-                    torch.randn(shape, generator=generator[i], device=rand_device, dtype=dtype)
-                    for i in range(batch_size)
-                ]
-                latents = torch.cat(latents, dim=0).to(device)
         else:
-                latents = torch.randn(shape, generator=generator, device=rand_device, dtype=dtype).to(device)
-        else:
-            if latents.shape != shape:
-                raise ValueError(f"Unexpected latents shape, got {latents.shape}, expected {shape}")
             latents = latents.to(device)
 
         # scale the initial noise by the standard deviation required by the scheduler

src/diffusers/pipelines/versatile_diffusion/pipeline_versatile_diffusion_text_to_image.py

@@ -22,7 +22,7 @@ from transformers import CLIPFeatureExtractor, CLIPTextModelWithProjection, CLIP
 
 from ...models import AutoencoderKL, Transformer2DModel, UNet2DConditionModel
 from ...schedulers import DDIMScheduler, LMSDiscreteScheduler, PNDMScheduler
-from ...utils import is_accelerate_available, logging
+from ...utils import is_accelerate_available, logging, randn_tensor
 from ..pipeline_utils import DiffusionPipeline, ImagePipelineOutput
 from .modeling_text_unet import UNetFlatConditionModel
 
@@ -298,20 +298,8 @@ class VersatileDiffusionTextToImagePipeline(DiffusionPipeline):
             )
 
         if latents is None:
-            rand_device = "cpu" if device.type == "mps" else device
+            latents = randn_tensor(shape, generator=generator, device=device, dtype=dtype)
-
-            if isinstance(generator, list):
-                shape = (1,) + shape[1:]
-                latents = [
-                    torch.randn(shape, generator=generator[i], device=rand_device, dtype=dtype)
-                    for i in range(batch_size)
-                ]
-                latents = torch.cat(latents, dim=0).to(device)
         else:
-                latents = torch.randn(shape, generator=generator, device=rand_device, dtype=dtype).to(device)
-        else:
-            if latents.shape != shape:
-                raise ValueError(f"Unexpected latents shape, got {latents.shape}, expected {shape}")
             latents = latents.to(device)
 
         # scale the initial noise by the standard deviation required by the scheduler

src/diffusers/schedulers/scheduling_ddim.py

@@ -23,7 +23,7 @@ import numpy as np
 import torch
 
 from ..configuration_utils import ConfigMixin, register_to_config
-from ..utils import _COMPATIBLE_STABLE_DIFFUSION_SCHEDULERS, BaseOutput, deprecate
+from ..utils import _COMPATIBLE_STABLE_DIFFUSION_SCHEDULERS, BaseOutput, deprecate, randn_tensor
 from .scheduling_utils import SchedulerMixin
 
 
@@ -324,12 +324,7 @@ class DDIMScheduler(SchedulerMixin, ConfigMixin):
                 )
 
             if variance_noise is None:
-                if device.type == "mps":
+                variance_noise = randn_tensor(
-                    # randn does not work reproducibly on mps
-                    variance_noise = torch.randn(model_output.shape, dtype=model_output.dtype, generator=generator)
-                    variance_noise = variance_noise.to(device)
-                else:
-                    variance_noise = torch.randn(
                     model_output.shape, generator=generator, device=device, dtype=model_output.dtype
                 )
             variance = self._get_variance(timestep, prev_timestep) ** (0.5) * eta * variance_noise

src/diffusers/schedulers/scheduling_ddpm.py

@@ -22,7 +22,7 @@ import numpy as np
 import torch
 
 from ..configuration_utils import ConfigMixin, FrozenDict, register_to_config
-from ..utils import _COMPATIBLE_STABLE_DIFFUSION_SCHEDULERS, BaseOutput, deprecate
+from ..utils import _COMPATIBLE_STABLE_DIFFUSION_SCHEDULERS, BaseOutput, deprecate, randn_tensor
 from .scheduling_utils import SchedulerMixin
 
 
@@ -313,12 +313,7 @@ class DDPMScheduler(SchedulerMixin, ConfigMixin):
         variance = 0
         if t > 0:
             device = model_output.device
-            if device.type == "mps":
+            variance_noise = randn_tensor(
-                # randn does not work reproducibly on mps
-                variance_noise = torch.randn(model_output.shape, dtype=model_output.dtype, generator=generator)
-                variance_noise = variance_noise.to(device)
-            else:
-                variance_noise = torch.randn(
                 model_output.shape, generator=generator, device=device, dtype=model_output.dtype
             )
             if self.variance_type == "fixed_small_log":

src/diffusers/schedulers/scheduling_euler_ancestral_discrete.py

@@ -19,7 +19,7 @@ import numpy as np
 import torch
 
 from ..configuration_utils import ConfigMixin, register_to_config
-from ..utils import _COMPATIBLE_STABLE_DIFFUSION_SCHEDULERS, BaseOutput, logging
+from ..utils import _COMPATIBLE_STABLE_DIFFUSION_SCHEDULERS, BaseOutput, logging, randn_tensor
 from .scheduling_utils import SchedulerMixin
 
 
@@ -230,15 +230,7 @@ class EulerAncestralDiscreteScheduler(SchedulerMixin, ConfigMixin):
         prev_sample = sample + derivative * dt
 
         device = model_output.device
-        if device.type == "mps":
+        noise = randn_tensor(model_output.shape, dtype=model_output.dtype, device=device, generator=generator)
-            # randn does not work reproducibly on mps
-            noise = torch.randn(model_output.shape, dtype=model_output.dtype, device="cpu", generator=generator).to(
-                device
-            )
-        else:
-            noise = torch.randn(model_output.shape, dtype=model_output.dtype, device=device, generator=generator).to(
-                device
-            )
 
         prev_sample = prev_sample + noise * sigma_up
 

src/diffusers/schedulers/scheduling_euler_discrete.py

@@ -19,7 +19,7 @@ import numpy as np
 import torch
 
 from ..configuration_utils import ConfigMixin, register_to_config
-from ..utils import _COMPATIBLE_STABLE_DIFFUSION_SCHEDULERS, BaseOutput, logging
+from ..utils import _COMPATIBLE_STABLE_DIFFUSION_SCHEDULERS, BaseOutput, logging, randn_tensor
 from .scheduling_utils import SchedulerMixin
 
 
@@ -217,15 +217,8 @@ class EulerDiscreteScheduler(SchedulerMixin, ConfigMixin):
 
         gamma = min(s_churn / (len(self.sigmas) - 1), 2**0.5 - 1) if s_tmin <= sigma <= s_tmax else 0.0
 
-        device = model_output.device
+        noise = randn_tensor(
-        if device.type == "mps":
+            model_output.shape, dtype=model_output.dtype, device=model_output.device, generator=generator
-            # randn does not work reproducibly on mps
-            noise = torch.randn(model_output.shape, dtype=model_output.dtype, device="cpu", generator=generator).to(
-                device
-            )
-        else:
-            noise = torch.randn(model_output.shape, dtype=model_output.dtype, device=device, generator=generator).to(
-                device
         )
 
         eps = noise * s_noise

src/diffusers/schedulers/scheduling_k_dpm_2_ancestral_discrete.py

@@ -18,7 +18,7 @@ import numpy as np
 import torch
 
 from ..configuration_utils import ConfigMixin, register_to_config
-from ..utils import _COMPATIBLE_STABLE_DIFFUSION_SCHEDULERS
+from ..utils import _COMPATIBLE_STABLE_DIFFUSION_SCHEDULERS, randn_tensor
 from .scheduling_utils import SchedulerMixin, SchedulerOutput
 
 
@@ -243,15 +243,7 @@ class KDPM2AncestralDiscreteScheduler(SchedulerMixin, ConfigMixin):
         sigma_hat = sigma * (gamma + 1)  # Note: sigma_hat == sigma for now
 
         device = model_output.device
-        if device.type == "mps":
+        noise = randn_tensor(model_output.shape, dtype=model_output.dtype, device=device, generator=generator)
-            # randn does not work reproducibly on mps
-            noise = torch.randn(model_output.shape, dtype=model_output.dtype, device="cpu", generator=generator).to(
-                device
-            )
-        else:
-            noise = torch.randn(model_output.shape, dtype=model_output.dtype, device=device, generator=generator).to(
-                device
-            )
 
         # 1. compute predicted original sample (x_0) from sigma-scaled predicted noise
         if self.config.prediction_type == "epsilon":

src/diffusers/schedulers/scheduling_karras_ve.py

@@ -20,7 +20,7 @@ import numpy as np
 import torch
 
 from ..configuration_utils import ConfigMixin, register_to_config
-from ..utils import BaseOutput
+from ..utils import BaseOutput, randn_tensor
 from .scheduling_utils import SchedulerMixin
 
 
@@ -147,7 +147,7 @@ class KarrasVeScheduler(SchedulerMixin, ConfigMixin):
             gamma = 0
 
         # sample eps ~ N(0, S_noise^2 * I)
-        eps = self.config.s_noise * torch.randn(sample.shape, generator=generator).to(sample.device)
+        eps = self.config.s_noise * randn_tensor(sample.shape, generator=generator).to(sample.device)
         sigma_hat = sigma + gamma * sigma
         sample_hat = sample + ((sigma_hat**2 - sigma**2) ** 0.5 * eps)
 

src/diffusers/schedulers/scheduling_repaint.py

@@ -20,7 +20,7 @@ import numpy as np
 import torch
 
 from ..configuration_utils import ConfigMixin, register_to_config
-from ..utils import BaseOutput
+from ..utils import BaseOutput, randn_tensor
 from .scheduling_utils import SchedulerMixin
 
 
@@ -271,12 +271,7 @@ class RePaintScheduler(SchedulerMixin, ConfigMixin):
 
         # 5. Add noise
         device = model_output.device
-        if device.type == "mps":
+        noise = randn_tensor(model_output.shape, generator=generator, device=device, dtype=model_output.dtype)
-            # randn does not work reproducibly on mps
-            noise = torch.randn(model_output.shape, dtype=model_output.dtype, generator=generator)
-            noise = noise.to(device)
-        else:
-            noise = torch.randn(model_output.shape, generator=generator, device=device, dtype=model_output.dtype)
         std_dev_t = self.eta * self._get_variance(timestep) ** 0.5
 
         variance = 0
@@ -311,10 +306,10 @@ class RePaintScheduler(SchedulerMixin, ConfigMixin):
             beta = self.betas[timestep + i]
             if sample.device.type == "mps":
                 # randn does not work reproducibly on mps
-                noise = torch.randn(sample.shape, dtype=sample.dtype, generator=generator)
+                noise = randn_tensor(sample.shape, dtype=sample.dtype, generator=generator)
                 noise = noise.to(sample.device)
             else:
-                noise = torch.randn(sample.shape, generator=generator, device=sample.device, dtype=sample.dtype)
+                noise = randn_tensor(sample.shape, generator=generator, device=sample.device, dtype=sample.dtype)
 
             # 10. Algorithm 1 Line 10 https://arxiv.org/pdf/2201.09865.pdf
             sample = (1 - beta) ** 0.5 * sample + beta**0.5 * noise

src/diffusers/schedulers/scheduling_sde_ve.py

@@ -21,7 +21,7 @@ from typing import Optional, Tuple, Union
 import torch
 
 from ..configuration_utils import ConfigMixin, register_to_config
-from ..utils import BaseOutput
+from ..utils import BaseOutput, randn_tensor
 from .scheduling_utils import SchedulerMixin, SchedulerOutput
 
 
@@ -201,7 +201,9 @@ class ScoreSdeVeScheduler(SchedulerMixin, ConfigMixin):
         drift = drift - diffusion**2 * model_output
 
         #  equation 6: sample noise for the diffusion term of
-        noise = torch.randn(sample.shape, layout=sample.layout, generator=generator).to(sample.device)
+        noise = randn_tensor(
+            sample.shape, layout=sample.layout, generator=generator, device=sample.device, dtype=sample.dtype
+        )
         prev_sample_mean = sample - drift  # subtract because `dt` is a small negative timestep
         # TODO is the variable diffusion the correct scaling term for the noise?
         prev_sample = prev_sample_mean + diffusion * noise  # add impact of diffusion field g
@@ -241,7 +243,7 @@ class ScoreSdeVeScheduler(SchedulerMixin, ConfigMixin):
 
         # For small batch sizes, the paper "suggest replacing norm(z) with sqrt(d), where d is the dim. of z"
         # sample noise for correction
-        noise = torch.randn(sample.shape, layout=sample.layout, generator=generator).to(sample.device)
+        noise = randn_tensor(sample.shape, layout=sample.layout, generator=generator).to(sample.device)
 
         # compute step size from the model_output, the noise, and the snr
         grad_norm = torch.norm(model_output.reshape(model_output.shape[0], -1), dim=-1).mean()

src/diffusers/schedulers/scheduling_sde_vp.py

@@ -20,6 +20,7 @@ from typing import Union
 import torch
 
 from ..configuration_utils import ConfigMixin, register_to_config
+from ..utils import randn_tensor
 from .scheduling_utils import SchedulerMixin
 
 
@@ -80,7 +81,7 @@ class ScoreSdeVpScheduler(SchedulerMixin, ConfigMixin):
         x_mean = x + drift * dt
 
         # add noise
-        noise = torch.randn(x.shape, layout=x.layout, generator=generator).to(x.device)
+        noise = randn_tensor(x.shape, layout=x.layout, generator=generator, device=x.device, dtype=x.dtype)
         x = x_mean + diffusion * math.sqrt(-dt) * noise
 
         return x, x_mean

src/diffusers/schedulers/scheduling_unclip.py

@@ -20,7 +20,7 @@ import numpy as np
 import torch
 
 from ..configuration_utils import ConfigMixin, register_to_config
-from ..utils import BaseOutput, torch_randn
+from ..utils import BaseOutput, randn_tensor
 from .scheduling_utils import SchedulerMixin
 
 
@@ -273,7 +273,7 @@ class UnCLIPScheduler(SchedulerMixin, ConfigMixin):
         # 6. Add noise
         variance = 0
         if t > 0:
-            variance_noise = torch_randn(
+            variance_noise = randn_tensor(
                 model_output.shape, dtype=model_output.dtype, generator=generator, device=model_output.device
             )
 

src/diffusers/utils/__init__.py

@@ -64,7 +64,7 @@ from .import_utils import (
 from .logging import get_logger
 from .outputs import BaseOutput
 from .pil_utils import PIL_INTERPOLATION
-from .torch_utils import torch_randn
+from .torch_utils import randn_tensor
 
 
 if is_torch_available():

src/diffusers/utils/torch_utils.py

@@ -26,11 +26,12 @@ if is_torch_available():
 logger = logging.get_logger(__name__)  # pylint: disable=invalid-name
 
 
-def torch_randn(
+def randn_tensor(
     shape: Union[Tuple, List],
     generator: Optional[Union[List["torch.Generator"], "torch.Generator"]] = None,
     device: Optional["torch.device"] = None,
     dtype: Optional["torch.dtype"] = None,
+    layout: Optional["torch.layout"] = None,
 ):
     """This is a helper function that allows to create random tensors on the desired `device` with the desired `dtype`. When
     passing a list of generators one can seed each batched size individually. If CPU generators are passed the tensor
@@ -40,8 +41,12 @@ def torch_randn(
     rand_device = device
     batch_size = shape[0]
 
+    layout = layout or torch.strided
+    device = device or torch.device("cpu")
+
     if generator is not None:
-        if generator.device != device and generator.device.type == "cpu":
+        gen_device_type = generator.device.type if not isinstance(generator, list) else generator[0].device.type
+        if gen_device_type != device.type and gen_device_type == "cpu":
             rand_device = "cpu"
             if device != "mps":
                 logger.info(
@@ -49,16 +54,17 @@ def torch_randn(
                     f" Tensors will be created on 'cpu' and then moved to {device}. Note that one can probably"
                     f" slighly speed up this function by passing a generator that was created on the {device} device."
                 )
-        elif generator.device.type != device.type and generator.device.type == "cuda":
+        elif gen_device_type != device.type and gen_device_type == "cuda":
-            raise ValueError(f"Cannot generate a {device} tensor from a generator of type {generator.device.type}.")
+            raise ValueError(f"Cannot generate a {device} tensor from a generator of type {gen_device_type}.")
 
     if isinstance(generator, list):
         shape = (1,) + shape[1:]
         latents = [
-            torch.randn(shape, generator=generator[i], device=rand_device, dtype=dtype) for i in range(batch_size)
+            torch.randn(shape, generator=generator[i], device=rand_device, dtype=dtype, layout=layout)
+            for i in range(batch_size)
         ]
         latents = torch.cat(latents, dim=0).to(device)
     else:
-        latents = torch.randn(shape, generator=generator, device=rand_device, dtype=dtype).to(device)
+        latents = torch.randn(shape, generator=generator, device=rand_device, dtype=dtype, layout=layout).to(device)
 
     return latents

tests/pipelines/karras_ve/test_karras_ve.py

@@ -25,44 +25,6 @@ from diffusers.utils.testing_utils import require_torch, slow, torch_device
 torch.backends.cuda.matmul.allow_tf32 = False
 
 
-class KarrasVePipelineFastTests(unittest.TestCase):
-    @property
-    def dummy_uncond_unet(self):
-        torch.manual_seed(0)
-        model = UNet2DModel(
-            block_out_channels=(32, 64),
-            layers_per_block=2,
-            sample_size=32,
-            in_channels=3,
-            out_channels=3,
-            down_block_types=("DownBlock2D", "AttnDownBlock2D"),
-            up_block_types=("AttnUpBlock2D", "UpBlock2D"),
-        )
-        return model
-
-    def test_inference(self):
-        unet = self.dummy_uncond_unet
-        scheduler = KarrasVeScheduler()
-
-        pipe = KarrasVePipeline(unet=unet, scheduler=scheduler)
-        pipe.to(torch_device)
-        pipe.set_progress_bar_config(disable=None)
-
-        generator = torch.manual_seed(0)
-        image = pipe(num_inference_steps=2, generator=generator, output_type="numpy").images
-
-        generator = torch.manual_seed(0)
-        image_from_tuple = pipe(num_inference_steps=2, generator=generator, output_type="numpy", 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
-
-
 @slow
 @require_torch
 class KarrasVePipelineIntegrationTests(unittest.TestCase):

tests/pipelines/paint_by_example/test_paint_by_example.py

@@ -132,7 +132,7 @@ class PaintByExamplePipelineFastTests(PipelineTesterMixin, unittest.TestCase):
         image_slice = image[0, -3:, -3:, -1]
 
         assert image.shape == (1, 64, 64, 3)
-        expected_slice = np.array([0.4397, 0.5553, 0.3802, 0.5222, 0.5811, 0.4342, 0.494, 0.4577, 0.4428])
+        expected_slice = np.array([0.4701, 0.5555, 0.3994, 0.5107, 0.5691, 0.4517, 0.5125, 0.4769, 0.4539])
 
         assert np.abs(image_slice.flatten() - expected_slice).max() < 1e-2
 

tests/pipelines/unclip/test_unclip.py

@@ -21,7 +21,7 @@ import torch
 
 from diffusers import PriorTransformer, UnCLIPPipeline, UnCLIPScheduler, UNet2DConditionModel, UNet2DModel
 from diffusers.pipelines.unclip.text_proj import UnCLIPTextProjModel
-from diffusers.utils import load_numpy, slow, torch_device
+from diffusers.utils import load_numpy, nightly, slow, torch_device
 from diffusers.utils.testing_utils import require_torch_gpu
 from transformers import CLIPTextConfig, CLIPTextModelWithProjection, CLIPTokenizer
 
@@ -363,6 +363,37 @@ class UnCLIPPipelineFastTests(unittest.TestCase):
         assert np.abs(image - image_from_text).max() < 1e-4
 
 
+@nightly
+class UnCLIPPipelineCPUIntegrationTests(unittest.TestCase):
+    def tearDown(self):
+        # clean up the VRAM after each test
+        super().tearDown()
+        gc.collect()
+        torch.cuda.empty_cache()
+
+    def test_unclip_karlo_cpu_fp32(self):
+        expected_image = load_numpy(
+            "https://huggingface.co/datasets/hf-internal-testing/diffusers-images/resolve/main"
+            "/unclip/karlo_v1_alpha_horse_cpu.npy"
+        )
+
+        pipeline = UnCLIPPipeline.from_pretrained("kakaobrain/karlo-v1-alpha")
+        pipeline.set_progress_bar_config(disable=None)
+
+        generator = torch.manual_seed(0)
+        output = pipeline(
+            "horse",
+            num_images_per_prompt=1,
+            generator=generator,
+            output_type="np",
+        )
+
+        image = output.images[0]
+
+        assert image.shape == (256, 256, 3)
+        assert np.abs(expected_image - image).max() < 1e-1
+
+
 @slow
 @require_torch_gpu
 class UnCLIPPipelineIntegrationTests(unittest.TestCase):
@@ -385,15 +416,19 @@ class UnCLIPPipelineIntegrationTests(unittest.TestCase):
         generator = torch.Generator(device="cpu").manual_seed(0)
         output = pipeline(
             "horse",
-            num_images_per_prompt=1,
             generator=generator,
             output_type="np",
         )
 
-        image = output.images[0]
+        image = np.asarray(pipeline.numpy_to_pil(output.images)[0], dtype=np.float32)
+        expected_image = np.asarray(pipeline.numpy_to_pil(expected_image)[0], dtype=np.float32)
 
+        # Karlo is extremely likely to strongly deviate depending on which hardware is used
+        # Here we just check that the image doesn't deviate more than 10 pixels from the reference image on average
+        avg_diff = np.abs(image - expected_image).mean()
+
+        assert avg_diff < 10, f"Error image deviates {avg_diff} pixels on average"
         assert image.shape == (256, 256, 3)
-        assert np.abs(expected_image - image).max() < 1e-2
 
     def test_unclip_pipeline_with_sequential_cpu_offloading(self):
         torch.cuda.empty_cache()

tests/pipelines/unclip/test_unclip_image_variation.py

@@ -475,20 +475,25 @@ class UnCLIPImageVariationPipelineIntegrationTests(unittest.TestCase):
             "/unclip/karlo_v1_alpha_cat_variation_fp16.npy"
         )
 
-        pipeline = UnCLIPImageVariationPipeline.from_pretrained("fusing/karlo-image-variations-diffusers")
+        pipeline = UnCLIPImageVariationPipeline.from_pretrained(
+            "fusing/karlo-image-variations-diffusers", torch_dtype=torch.float16
+        )
         pipeline = pipeline.to(torch_device)
         pipeline.set_progress_bar_config(disable=None)
-        pipeline.enable_sequential_cpu_offload()
 
         generator = torch.Generator(device="cpu").manual_seed(0)
         output = pipeline(
             input_image,
-            num_images_per_prompt=1,
             generator=generator,
             output_type="np",
         )
 
-        image = output.images[0]
+        image = np.asarray(pipeline.numpy_to_pil(output.images)[0], dtype=np.float32)
+        expected_image = np.asarray(pipeline.numpy_to_pil(expected_image)[0], dtype=np.float32)
 
+        # Karlo is extremely likely to strongly deviate depending on which hardware is used
+        # Here we just check that the image doesn't deviate more than 10 pixels from the reference image on average
+        avg_diff = np.abs(image - expected_image).mean()
+
+        assert avg_diff < 10, f"Error image deviates {avg_diff} pixels on average"
         assert image.shape == (256, 256, 3)
-        assert np.abs(expected_image - image).max() < 5e-2