add the xm.mark_step for the first denosing loop (#10530)

* Update rerender_a_video.py

* Update rerender_a_video.py

* Update examples/community/rerender_a_video.py

Co-authored-by: hlky <[email protected]>

* Update rerender_a_video.py

* make style

---------

Co-authored-by: hlky <[email protected]>
Co-authored-by: YiYi Xu <[email protected]>

Author: 3 people

examples/community/rerender_a_video.py

@@ -908,6 +908,9 @@ def __call__(
                     if callback is not None and i % callback_steps == 0:
                         callback(i, t, latents)
 
+                if XLA_AVAILABLE:
+                    xm.mark_step()
+
         if not output_type == "latent":
             image = self.vae.decode(latents / self.vae.config.scaling_factor, return_dict=False)[0]
         else: