add cpu support & add intel ipex optimizations

configs/stable-diffusion/ipex/v2-inference-bf16.yaml

@@ -0,0 +1,68 @@
+model:
+  base_learning_rate: 1.0e-4
+  target: ldm.models.diffusion.ddpm.LatentDiffusion
+  params:
+    linear_start: 0.00085
+    linear_end: 0.0120
+    num_timesteps_cond: 1
+    log_every_t: 200
+    timesteps: 1000
+    first_stage_key: "jpg"
+    cond_stage_key: "txt"
+    image_size: 64
+    channels: 4
+    cond_stage_trainable: false
+    conditioning_key: crossattn
+    monitor: val/loss_simple_ema
+    scale_factor: 0.18215
+    use_ema: False # we set this to false because this is an inference only config
+
+    unet_config:
+      target: ldm.modules.diffusionmodules.openaimodel.UNetModel
+      params:
+        use_checkpoint: False
+        use_fp16: False
+        use_bf16: True
+        image_size: 32 # unused
+        in_channels: 4
+        out_channels: 4
+        model_channels: 320
+        attention_resolutions: [ 4, 2, 1 ]
+        num_res_blocks: 2
+        channel_mult: [ 1, 2, 4, 4 ]
+        num_head_channels: 64 # need to fix for flash-attn
+        use_spatial_transformer: True
+        use_linear_in_transformer: True
+        transformer_depth: 1
+        context_dim: 1024
+        legacy: False
+
+    first_stage_config:
+      target: ldm.models.autoencoder.AutoencoderKL
+      params:
+        embed_dim: 4
+        monitor: val/rec_loss
+        ddconfig:
+          #attn_type: "vanilla-xformers"
+          double_z: true
+          z_channels: 4
+          resolution: 256
+          in_channels: 3
+          out_ch: 3
+          ch: 128
+          ch_mult:
+          - 1
+          - 2
+          - 4
+          - 4
+          num_res_blocks: 2
+          attn_resolutions: []
+          dropout: 0.0
+        lossconfig:
+          target: torch.nn.Identity
+
+    cond_stage_config:
+      target: ldm.modules.encoders.modules.FrozenOpenCLIPEmbedder
+      params:
+        freeze: True
+        layer: "penultimate"

configs/stable-diffusion/ipex/v2-inference-fp32.yaml

@@ -0,0 +1,67 @@
+model:
+  base_learning_rate: 1.0e-4
+  target: ldm.models.diffusion.ddpm.LatentDiffusion
+  params:
+    linear_start: 0.00085
+    linear_end: 0.0120
+    num_timesteps_cond: 1
+    log_every_t: 200
+    timesteps: 1000
+    first_stage_key: "jpg"
+    cond_stage_key: "txt"
+    image_size: 64
+    channels: 4
+    cond_stage_trainable: false
+    conditioning_key: crossattn
+    monitor: val/loss_simple_ema
+    scale_factor: 0.18215
+    use_ema: False # we set this to false because this is an inference only config
+
+    unet_config:
+      target: ldm.modules.diffusionmodules.openaimodel.UNetModel
+      params:
+        use_checkpoint: False
+        use_fp16: False
+        image_size: 32 # unused
+        in_channels: 4
+        out_channels: 4
+        model_channels: 320
+        attention_resolutions: [ 4, 2, 1 ]
+        num_res_blocks: 2
+        channel_mult: [ 1, 2, 4, 4 ]
+        num_head_channels: 64 # need to fix for flash-attn
+        use_spatial_transformer: True
+        use_linear_in_transformer: True
+        transformer_depth: 1
+        context_dim: 1024
+        legacy: False
+
+    first_stage_config:
+      target: ldm.models.autoencoder.AutoencoderKL
+      params:
+        embed_dim: 4
+        monitor: val/rec_loss
+        ddconfig:
+          #attn_type: "vanilla-xformers"
+          double_z: true
+          z_channels: 4
+          resolution: 256
+          in_channels: 3
+          out_ch: 3
+          ch: 128
+          ch_mult:
+          - 1
+          - 2
+          - 4
+          - 4
+          num_res_blocks: 2
+          attn_resolutions: []
+          dropout: 0.0
+        lossconfig:
+          target: torch.nn.Identity
+
+    cond_stage_config:
+      target: ldm.modules.encoders.modules.FrozenOpenCLIPEmbedder
+      params:
+        freeze: True
+        layer: "penultimate"

configs/stable-diffusion/ipex/v2-inference-v-bf16.yaml

@@ -0,0 +1,69 @@
+model:
+  base_learning_rate: 1.0e-4
+  target: ldm.models.diffusion.ddpm.LatentDiffusion
+  params:
+    parameterization: "v"
+    linear_start: 0.00085
+    linear_end: 0.0120
+    num_timesteps_cond: 1
+    log_every_t: 200
+    timesteps: 1000
+    first_stage_key: "jpg"
+    cond_stage_key: "txt"
+    image_size: 64
+    channels: 4
+    cond_stage_trainable: false
+    conditioning_key: crossattn
+    monitor: val/loss_simple_ema
+    scale_factor: 0.18215
+    use_ema: False # we set this to false because this is an inference only config
+
+    unet_config:
+      target: ldm.modules.diffusionmodules.openaimodel.UNetModel
+      params:
+        use_checkpoint: False
+        use_fp16: False
+        use_bf16: True
+        image_size: 32 # unused
+        in_channels: 4
+        out_channels: 4
+        model_channels: 320
+        attention_resolutions: [ 4, 2, 1 ]
+        num_res_blocks: 2
+        channel_mult: [ 1, 2, 4, 4 ]
+        num_head_channels: 64 # need to fix for flash-attn
+        use_spatial_transformer: True
+        use_linear_in_transformer: True
+        transformer_depth: 1
+        context_dim: 1024
+        legacy: False
+
+    first_stage_config:
+      target: ldm.models.autoencoder.AutoencoderKL
+      params:
+        embed_dim: 4
+        monitor: val/rec_loss
+        ddconfig:
+          #attn_type: "vanilla-xformers"
+          double_z: true
+          z_channels: 4
+          resolution: 256
+          in_channels: 3
+          out_ch: 3
+          ch: 128
+          ch_mult:
+          - 1
+          - 2
+          - 4
+          - 4
+          num_res_blocks: 2
+          attn_resolutions: []
+          dropout: 0.0
+        lossconfig:
+          target: torch.nn.Identity
+
+    cond_stage_config:
+      target: ldm.modules.encoders.modules.FrozenOpenCLIPEmbedder
+      params:
+        freeze: True
+        layer: "penultimate"

configs/stable-diffusion/ipex/v2-inference-v-fp32.yaml

@@ -0,0 +1,68 @@
+model:
+  base_learning_rate: 1.0e-4
+  target: ldm.models.diffusion.ddpm.LatentDiffusion
+  params:
+    parameterization: "v"
+    linear_start: 0.00085
+    linear_end: 0.0120
+    num_timesteps_cond: 1
+    log_every_t: 200
+    timesteps: 1000
+    first_stage_key: "jpg"
+    cond_stage_key: "txt"
+    image_size: 64
+    channels: 4
+    cond_stage_trainable: false
+    conditioning_key: crossattn
+    monitor: val/loss_simple_ema
+    scale_factor: 0.18215
+    use_ema: False # we set this to false because this is an inference only config
+
+    unet_config:
+      target: ldm.modules.diffusionmodules.openaimodel.UNetModel
+      params:
+        use_checkpoint: False
+        use_fp16: False
+        image_size: 32 # unused
+        in_channels: 4
+        out_channels: 4
+        model_channels: 320
+        attention_resolutions: [ 4, 2, 1 ]
+        num_res_blocks: 2
+        channel_mult: [ 1, 2, 4, 4 ]
+        num_head_channels: 64 # need to fix for flash-attn
+        use_spatial_transformer: True
+        use_linear_in_transformer: True
+        transformer_depth: 1
+        context_dim: 1024
+        legacy: False
+
+    first_stage_config:
+      target: ldm.models.autoencoder.AutoencoderKL
+      params:
+        embed_dim: 4
+        monitor: val/rec_loss
+        ddconfig:
+          #attn_type: "vanilla-xformers"
+          double_z: true
+          z_channels: 4
+          resolution: 256
+          in_channels: 3
+          out_ch: 3
+          ch: 128
+          ch_mult:
+          - 1
+          - 2
+          - 4
+          - 4
+          num_res_blocks: 2
+          attn_resolutions: []
+          dropout: 0.0
+        lossconfig:
+          target: torch.nn.Identity
+
+    cond_stage_config:
+      target: ldm.modules.encoders.modules.FrozenOpenCLIPEmbedder
+      params:
+        freeze: True
+        layer: "penultimate"

ldm/models/diffusion/ddim.py

@@ -8,16 +8,17 @@ from ldm.modules.diffusionmodules.util import make_ddim_sampling_parameters, mak
 
 
 class DDIMSampler(object):
-    def __init__(self, model, schedule="linear", **kwargs):
+    def __init__(self, model, schedule="linear", device=torch.device("cuda"), **kwargs):
         super().__init__()
         self.model = model
         self.ddpm_num_timesteps = model.num_timesteps
         self.schedule = schedule
+        self.device = device
 
     def register_buffer(self, name, attr):
         if type(attr) == torch.Tensor:
-            if attr.device != torch.device("cuda"):
+            if attr.device != self.device:
-                attr = attr.to(torch.device("cuda"))
+                attr = attr.to(self.device)
         setattr(self, name, attr)
 
     def make_schedule(self, ddim_num_steps, ddim_discretize="uniform", ddim_eta=0., verbose=True):

ldm/models/diffusion/ddpm.py

@@ -1326,6 +1326,12 @@ class DiffusionWrapper(pl.LightningModule):
                 cc = torch.cat(c_crossattn, 1)
             else:
                 cc = c_crossattn
+            if hasattr(self, "scripted_diffusion_model"):
+                # TorchScript changes names of the arguments
+                # with argument cc defined as context=cc scripted model will produce
+                # an error: RuntimeError: forward() is missing value for argument 'argument_3'.
+                out = self.scripted_diffusion_model(x, t, cc)
+            else:
                 out = self.diffusion_model(x, t, context=cc)
         elif self.conditioning_key == 'hybrid':
             xc = torch.cat([x] + c_concat, dim=1)

ldm/models/diffusion/dpm_solver/sampler.py

@@ -11,16 +11,17 @@ MODEL_TYPES = {
 
 
 class DPMSolverSampler(object):
-    def __init__(self, model, **kwargs):
+    def __init__(self, model, device=torch.device("cuda"), **kwargs):
         super().__init__()
         self.model = model
+        self.device = device
         to_torch = lambda x: x.clone().detach().to(torch.float32).to(model.device)
         self.register_buffer('alphas_cumprod', to_torch(model.alphas_cumprod))
 
     def register_buffer(self, name, attr):
         if type(attr) == torch.Tensor:
-            if attr.device != torch.device("cuda"):
+            if attr.device != self.device:
-                attr = attr.to(torch.device("cuda"))
+                attr = attr.to(self.device)
         setattr(self, name, attr)
 
     @torch.no_grad()

ldm/models/diffusion/plms.py

@@ -10,16 +10,17 @@ from ldm.models.diffusion.sampling_util import norm_thresholding
 
 
 class PLMSSampler(object):
-    def __init__(self, model, schedule="linear", **kwargs):
+    def __init__(self, model, schedule="linear", device=torch.device("cuda"), **kwargs):
         super().__init__()
         self.model = model
         self.ddpm_num_timesteps = model.num_timesteps
         self.schedule = schedule
+        self.device = device
 
     def register_buffer(self, name, attr):
         if type(attr) == torch.Tensor:
-            if attr.device != torch.device("cuda"):
+            if attr.device != self.device:
-                attr = attr.to(torch.device("cuda"))
+                attr = attr.to(self.device)
         setattr(self, name, attr)
 
     def make_schedule(self, ddim_num_steps, ddim_discretize="uniform", ddim_eta=0., verbose=True):

ldm/modules/diffusionmodules/openaimodel.py

@@ -454,6 +454,7 @@ class UNetModel(nn.Module):
         num_classes=None,
         use_checkpoint=False,
         use_fp16=False,
+        use_bf16=False,
         num_heads=-1,
         num_head_channels=-1,
         num_heads_upsample=-1,
@@ -518,6 +519,7 @@ class UNetModel(nn.Module):
         self.num_classes = num_classes
         self.use_checkpoint = use_checkpoint
         self.dtype = th.float16 if use_fp16 else th.float32
+        self.dtype = th.bfloat16 if use_bf16 else self.dtype
         self.num_heads = num_heads
         self.num_head_channels = num_head_channels
         self.num_heads_upsample = num_heads_upsample

scripts/txt2img.py

@@ -25,7 +25,7 @@ def chunk(it, size):
     return iter(lambda: tuple(islice(it, size)), ())
 
 
-def load_model_from_config(config, ckpt, verbose=False):
+def load_model_from_config(config, ckpt, device=torch.device("cuda"), verbose=False):
     print(f"Loading model from {ckpt}")
     pl_sd = torch.load(ckpt, map_location="cpu")
     if "global_step" in pl_sd:
@@ -40,7 +40,13 @@ def load_model_from_config(config, ckpt, verbose=False):
         print("unexpected keys:")
         print(u)
 
+    if device == torch.device("cuda"):
         model.cuda()
+    elif device == torch.device("cpu"):
+        model.cpu()
+        model.cond_stage_model.device = "cpu"
+    else:
+        raise ValueError(f"Incorrect device name. Received: {device}")
     model.eval()
     return model
 
@@ -171,6 +177,28 @@ def parse_args():
         default=1,
         help="repeat each prompt in file this often",
     )
+    parser.add_argument(
+        "--device",
+        type=str,
+        help="Device on which Stable Diffusion will be run",
+        choices=["cpu", "cuda"],
+        default="cpu"
+    )
+    parser.add_argument(
+        "--torchscript",
+        action='store_true',
+        help="Use TorchScript",
+    )
+    parser.add_argument(
+        "--ipex",
+        action='store_true',
+        help="Use Intel® Extension for PyTorch*",
+    )
+    parser.add_argument(
+        "--bf16",
+        action='store_true',
+        help="Use bfloat16",
+    )
     opt = parser.parse_args()
     return opt
 
@@ -187,17 +215,15 @@ def main(opt):
     seed_everything(opt.seed)
 
     config = OmegaConf.load(f"{opt.config}")
-    model = load_model_from_config(config, f"{opt.ckpt}")
+    device = torch.device("cuda") if opt.device == "cuda" else torch.device("cpu")
-
+    model = load_model_from_config(config, f"{opt.ckpt}", device)
-    device = torch.device("cuda") if torch.cuda.is_available() else torch.device("cpu")
-    model = model.to(device)
 
     if opt.plms:
-        sampler = PLMSSampler(model)
+        sampler = PLMSSampler(model, device=device)
     elif opt.dpm:
-        sampler = DPMSolverSampler(model)
+        sampler = DPMSolverSampler(model, device=device)
     else:
-        sampler = DDIMSampler(model)
+        sampler = DDIMSampler(model, device=device)
 
     os.makedirs(opt.outdir, exist_ok=True)
     outpath = opt.outdir
@@ -231,9 +257,82 @@ def main(opt):
     if opt.fixed_code:
         start_code = torch.randn([opt.n_samples, opt.C, opt.H // opt.f, opt.W // opt.f], device=device)
 
-    precision_scope = autocast if opt.precision == "autocast" else nullcontext
+    if opt.torchscript or opt.ipex:
+        transformer = model.cond_stage_model.model
+        unet = model.model.diffusion_model
+        decoder = model.first_stage_model.decoder
+        additional_context = torch.cpu.amp.autocast() if opt.bf16 else nullcontext()
+        shape = [opt.C, opt.H // opt.f, opt.W // opt.f]
+
+        if opt.bf16 and not opt.torchscript and not opt.ipex:
+            raise ValueError('Bfloat16 is supported only for torchscript+ipex')
+        if opt.bf16 and unet.dtype != torch.bfloat16:
+            raise ValueError("Use configs/stable-diffusion/ipex/ configs with bf16 enabled if " +
+                             "you'd like to use bfloat16 with CPU.")
+        if unet.dtype == torch.float16 and device == torch.device("cpu"):
+            raise ValueError("Use configs/stable-diffusion/ipex/ configs for your model if you'd like to run it on CPU.")
+
+        if opt.ipex:
+            import intel_extension_for_pytorch as ipex
+            bf16_dtype = torch.bfloat16 if opt.bf16 else None
+            transformer = transformer.to(memory_format=torch.channels_last)
+            transformer = ipex.optimize(transformer, level="O1", inplace=True)
+
+            unet = unet.to(memory_format=torch.channels_last)
+            unet = ipex.optimize(unet, level="O1", auto_kernel_selection=True, inplace=True, dtype=bf16_dtype)
+
+            decoder = decoder.to(memory_format=torch.channels_last)
+            decoder = ipex.optimize(decoder, level="O1", auto_kernel_selection=True, inplace=True, dtype=bf16_dtype)
+
+        if opt.torchscript:
+            with torch.no_grad(), additional_context:
+                # get UNET scripted
+                if unet.use_checkpoint:
+                    raise ValueError("Gradient checkpoint won't work with tracing. " +
+                    "Use configs/stable-diffusion/ipex/ configs for your model or disable checkpoint in your config.")
+
+                img_in = torch.ones(2, 4, 96, 96, dtype=torch.float32)
+                t_in = torch.ones(2, dtype=torch.int64)
+                context = torch.ones(2, 77, 1024, dtype=torch.float32)
+                scripted_unet = torch.jit.trace(unet, (img_in, t_in, context))
+                scripted_unet = torch.jit.optimize_for_inference(scripted_unet)
+                print(type(scripted_unet))
+                model.model.scripted_diffusion_model = scripted_unet
+
+                # get Decoder for first stage model scripted
+                samples_ddim = torch.ones(1, 4, 96, 96, dtype=torch.float32)
+                scripted_decoder = torch.jit.trace(decoder, (samples_ddim))
+                scripted_decoder = torch.jit.optimize_for_inference(scripted_decoder)
+                print(type(scripted_decoder))
+                model.first_stage_model.decoder = scripted_decoder
+
+        prompts = data[0]
+        print("Running a forward pass to initialize optimizations")
+        uc = None
+        if opt.scale != 1.0:
+            uc = model.get_learned_conditioning(batch_size * [""])
+        if isinstance(prompts, tuple):
+            prompts = list(prompts)
+
+        with torch.no_grad(), additional_context:
+            for _ in range(3):
+                c = model.get_learned_conditioning(prompts)
+            samples_ddim, _ = sampler.sample(S=5,
+                                             conditioning=c,
+                                             batch_size=batch_size,
+                                             shape=shape,
+                                             verbose=False,
+                                             unconditional_guidance_scale=opt.scale,
+                                             unconditional_conditioning=uc,
+                                             eta=opt.ddim_eta,
+                                             x_T=start_code)
+            print("Running a forward pass for decoder")
+            for _ in range(3):
+                x_samples_ddim = model.decode_first_stage(samples_ddim)
+
+    precision_scope = autocast if opt.precision=="autocast" or opt.bf16 else nullcontext
     with torch.no_grad(), \
-        precision_scope("cuda"), \
+        precision_scope(opt.device), \
         model.ema_scope():
             all_samples = list()
             for n in trange(opt.n_iter, desc="Sampling"):