Added TeaCache support

README.md

@@ -20,7 +20,8 @@ In this repository, we present **Wan2.1**, a comprehensive and open suite of vid
 
 ## 🔥 Latest News!!
 
-* Mar 03, 2025: 👋 Wan2.1GP by DeepBeepMeep v1 brings: 
+* Mar 03, 2025: 👋 Wan2.1GP v1.1: added Tea Cache support for faster generations:  optimization of kijai's implementation (https://github.com/kijai/ComfyUI-WanVideoWrapper/) of teacache (https://github.com/ali-vilab/TeaCache)  
+* Mar 02, 2025: 👋 Wan2.1GP by DeepBeepMeep v1 brings: 
     - Support for all Wan including the Image to Video model
     - Reduced memory consumption by 2, with possiblity to generate more than 10s of video at 720p with a RTX 4090 and 10s of video at 480p with less than 12GB of VRAM. Many thanks to REFLEx (https://github.com/thu-ml/RIFLEx) for their algorithm that allows generating nice looking video longer than 5s.
     - The usual perks: web interface, multiple generations, loras support, sage attebtion, auto download of models, ...
@@ -162,7 +163,7 @@ You will find prebuilt Loras on https://civitai.com/ or you will be able to buil
 
 ### Profiles (for power users only)
 You can choose between 5 profiles, but two are really relevant here :
-- LowRAM_HighVRAM  (3): loads entirely the model in VRAM, slighty faster, but less VRAM
+- LowRAM_HighVRAM  (3): loads entirely the model in VRAM, slightly faster, but less VRAM
 - LowRAM_LowVRAM  (4): load only the part of the models that is needed, low VRAM and low RAM requirement but slightly slower
 
 

gradio_server.py

@@ -19,7 +19,7 @@ from wan.modules.attention import get_attention_modes
 import torch
 import gc
 import traceback
-
+import math
 
 def _parse_args():
     parser = argparse.ArgumentParser(
@@ -650,6 +650,7 @@ def generate_video(
     embedded_guidance_scale,
     repeat_generation,
     tea_cache,
+    tea_cache_start_step_perc,    
     loras_choices,
     loras_mult_choices,
     image_to_continue,
@@ -783,12 +784,15 @@ def generate_video(
                 break
 
             if trans.enable_teacache:
-                trans.num_steps = num_inference_steps
-                trans.cnt = 0
-                trans.rel_l1_thresh = tea_cache #0.15 # 0.1 for 1.6x speedup, 0.15 for 2.1x speedup
-                trans.accumulated_rel_l1_distance = 0
-                trans.previous_modulated_input = None
-                trans.previous_residual = None
+                trans.teacache_counter = 0
+                trans.rel_l1_thresh = tea_cache
+                trans.teacache_start_step =  max(math.ceil(tea_cache_start_step_perc*num_inference_steps/100),2)
+                trans.previous_residual_uncond = None
+                trans.previous_modulated_input_uncond = None                
+                trans.previous_residual_cond = None
+                trans.previous_modulated_input_cond= None                
+
+                trans.teacache_cache_device = "cuda" if profile==3 or profile==1 else "cpu"                                 
 
             video_no += 1
             status = f"Video {video_no}/{total_video}"
@@ -799,6 +803,7 @@ def generate_video(
 
             gc.collect()
             torch.cuda.empty_cache()
+            wan_model._interrupt = False
             try:
                 if use_image2video:
                     samples = wan_model.generate(
@@ -858,6 +863,9 @@ def generate_video(
                 else:
                     raise gr.Error(f"The generation of the video has encountered an error, please check your terminal for more information. '{s}'")
 
+            if trans.enable_teacache:
+                trans.previous_residual_uncond = None
+                trans.previous_residual_cond = None
 
             if samples != None:
                 samples = samples.to("cpu")
@@ -874,7 +882,10 @@ def generate_video(
                 # video = rearrange(sample.cpu().numpy(), "c t h w -> t h w c")
 
                 time_flag = datetime.fromtimestamp(time.time()).strftime("%Y-%m-%d-%Hh%Mm%Ss")
-                file_name = f"{time_flag}_seed{seed}_{prompt[:100].replace('/','').strip()}.mp4".replace(':',' ').replace('\\',' ')
+                if os.name == 'nt':
+                    file_name = f"{time_flag}_seed{seed}_{prompt[:50].replace('/','').strip()}.mp4".replace(':',' ').replace('\\',' ')
+                else:
+                    file_name = f"{time_flag}_seed{seed}_{prompt[:100].replace('/','').strip()}.mp4".replace(':',' ').replace('\\',' ')
                 video_path = os.path.join(os.getcwd(), "gradio_outputs", file_name)        
                 cache_video(
                     tensor=sample[None],
@@ -1189,14 +1200,16 @@ def create_demo():
                             flow_shift = gr.Slider(0.0, 25.0, value= default_flow_shift, step=0.1, label="Shift Scale") 
                         tea_cache_setting = gr.Dropdown(
                             choices=[
-                                ("Disabled", 0),
-                                ("Fast (x1.6 speed up)", 0.1), 
-                                ("Faster (x2.1 speed up)", 0.15), 
+                                ("Tea Cache Disabled", 0),
+                                ("0.03 (around x1.6 speed up)", 0.03), 
+                                ("0.05 (around x2 speed up)", 0.05), 
+                                ("0.10 (around x3 speed up)", 0.1), 
                             ],
                             value=default_tea_cache,
-                            visible=False,
-                            label="Tea Cache acceleration (the faster the acceleration the higher the degradation of the quality of the video. Consumes VRAM)"
+                            visible=True,
+                            label="Tea Cache Threshold to Skip Steps (the higher, the more steps are skipped but the lower the quality of the video (Tea Cache Consumes VRAM)"
                         )
+                        tea_cache_start_step_perc = gr.Slider(2, 100, value=20, step=1, label="Tea Cache starting moment in percentage of generation (the later, the higher the quality but also the lower the speed gain)") 
 
                         RIFLEx_setting = gr.Dropdown(
                             choices=[
@@ -1241,6 +1254,7 @@ def create_demo():
                 embedded_guidance_scale,
                 repeat_generation,
                 tea_cache_setting,
+                tea_cache_start_step_perc,
                 loras_choices,
                 loras_mult_choices,
                 image_to_continue,

wan/image2video.py

@@ -316,7 +316,6 @@ class WanI2V:
         if callback != None:
             callback(-1, None)
 
-        self._interrupt = False
         for i, t in enumerate(tqdm(timesteps)):
             latent_model_input = [latent.to(self.device)]
             timestep = [t]
@@ -324,13 +323,13 @@ class WanI2V:
             timestep = torch.stack(timestep).to(self.device)
 
             noise_pred_cond = self.model(
-                latent_model_input, t=timestep, **arg_c)[0]
+                latent_model_input, t=timestep, current_step=i, is_uncond = False, **arg_c)[0]
             if self._interrupt:
                 return None                
             if offload_model:
                 torch.cuda.empty_cache()
             noise_pred_uncond = self.model(
-                latent_model_input, t=timestep, **arg_null)[0]
+                latent_model_input, t=timestep, current_step=i, is_uncond = True, **arg_null)[0]
             if self._interrupt:
                 return None                
             del latent_model_input

wan/modules/model.py

@@ -146,6 +146,11 @@ def rope_apply(x, grid_sizes, freqs):
         output.append(x_i)
     return torch.stack(output) #.float()
 
+def relative_l1_distance(last_tensor, current_tensor):
+    l1_distance = torch.abs(last_tensor - current_tensor).mean()
+    norm = torch.abs(last_tensor).mean()
+    relative_l1_distance = l1_distance / norm
+    return relative_l1_distance.to(torch.float32)
 
 class WanRMSNorm(nn.Module):
 
@@ -662,6 +667,7 @@ class WanModel(ModelMixin, ConfigMixin):
 
         return freqs
 
+
     def forward(
         self,
         x,
@@ -672,6 +678,8 @@ class WanModel(ModelMixin, ConfigMixin):
         y=None,
         freqs = None,
         pipeline = None,
+        current_step = 0,
+        is_uncond=False        
     ):
         r"""
         Forward pass through the diffusion model
@@ -723,7 +731,6 @@ class WanModel(ModelMixin, ConfigMixin):
         e = self.time_embedding(
             sinusoidal_embedding_1d(self.freq_dim, t))
         e0 = self.time_projection(e).unflatten(1, (6, self.dim)).to(torch.bfloat16)
-            # assert e.dtype == torch.float32 and e0.dtype == torch.float32
 
         # context
         context_lens = None
@@ -737,21 +744,71 @@ class WanModel(ModelMixin, ConfigMixin):
         if clip_fea is not None:
             context_clip = self.img_emb(clip_fea)  # bs x 257 x dim
             context = torch.concat([context_clip, context], dim=1)
-
-        # arguments
-        kwargs = dict(
-            e=e0,
-            seq_lens=seq_lens,
-            grid_sizes=grid_sizes,
-            freqs=freqs,
-            context=context,
-            context_lens=context_lens)
-
-        for block in self.blocks:
-            if pipeline._interrupt:
-                return [None]
-
-            x = block(x, **kwargs)
+        # deepbeepmeep optimization of kijai's implementation (https://github.com/kijai/ComfyUI-WanVideoWrapper/) of teacache (https://github.com/ali-vilab/TeaCache)
+        should_calc = True
+        if self.enable_teacache and current_step >= self.teacache_start_step:
+            if current_step == self.teacache_start_step:
+                self.accumulated_rel_l1_distance_cond = 0
+                self.accumulated_rel_l1_distance_uncond = 0
+                self.teacache_skipped_cond_steps = 0
+                self.teacache_skipped_uncond_steps = 0
+            else:
+                prev_input = self.previous_modulated_input_uncond if is_uncond else self.previous_modulated_input_cond
+                acc_distance_attr = 'accumulated_rel_l1_distance_uncond' if is_uncond else 'accumulated_rel_l1_distance_cond'
+
+                temb_relative_l1 = relative_l1_distance(prev_input, e0)
+                setattr(self, acc_distance_attr, getattr(self, acc_distance_attr) + temb_relative_l1)
+
+                if getattr(self, acc_distance_attr) < self.rel_l1_thresh:
+                    should_calc = False
+                    self.teacache_counter += 1
+                else:
+                    should_calc = True
+                    setattr(self, acc_distance_attr, 0)
+            
+            if is_uncond:                
+                self.previous_modulated_input_uncond = e0.clone()
+                if should_calc:
+                    self.previous_residual_uncond = None
+                else:
+                    x += self.previous_residual_uncond
+                    self.teacache_skipped_cond_steps += 1
+                    # print(f"Skipped uncond:{self.teacache_skipped_cond_steps}/{current_step}" )
+            else:
+                self.previous_modulated_input_cond = e0.clone()
+                if should_calc:
+                    self.previous_residual_cond = None
+                else:
+                    x += self.previous_residual_cond
+                    self.teacache_skipped_uncond_steps += 1
+                    # print(f"Skipped uncond:{self.teacache_skipped_uncond_steps}/{current_step}" )
+
+        if should_calc:
+            if self.enable_teacache:
+                ori_hidden_states = x.clone()
+            # arguments
+            kwargs = dict(
+                e=e0,
+                seq_lens=seq_lens,
+                grid_sizes=grid_sizes,
+                freqs=freqs,
+                context=context,
+                context_lens=context_lens)
+
+            for block in self.blocks:
+                if pipeline._interrupt:
+                    return [None]
+
+                x = block(x, **kwargs)
+
+            if self.enable_teacache:
+                residual = ori_hidden_states # just to have a readable code
+                torch.sub(x, ori_hidden_states, out=residual)
+                if is_uncond:
+                    self.previous_residual_uncond = residual
+                else:
+                    self.previous_residual_cond = residual
+                del residual, ori_hidden_states
 
         # head
         x = self.head(x, e)

wan/text2video.py

@@ -248,7 +248,6 @@ class WanT2V:
 
         if callback != None:
             callback(-1, None)
-        self._interrupt = False
         for i, t in enumerate(tqdm(timesteps)):
             latent_model_input = latents
             timestep = [t]
@@ -257,11 +256,11 @@ class WanT2V:
 
             # self.model.to(self.device)
             noise_pred_cond = self.model(
-                latent_model_input, t=timestep, **arg_c)[0]
+                latent_model_input, t=timestep,current_step=i, is_uncond = False, **arg_c)[0]
             if self._interrupt:
                 return None               
             noise_pred_uncond = self.model(
-                latent_model_input, t=timestep, **arg_null)[0]
+                latent_model_input, t=timestep,current_step=i, is_uncond = True, **arg_null)[0]
             if self._interrupt:
                 return None