call torch_gc before/after each gpu gradio operation

webui.py

 import os
 import threading
 
+from modules import devices
 from modules.paths import script_path
 
 import signal
@@ -47,6 +48,8 @@ def wrap_queued_call(func):
 
 def wrap_gradio_gpu_call(func):
     def f(*args, **kwargs):
+        devices.torch_gc()
+
         shared.state.sampling_step = 0
         shared.state.job_count = -1
         shared.state.job_no = 0
@@ -62,6 +65,8 @@ def wrap_gradio_gpu_call(func):
         shared.state.job = ""
         shared.state.job_count = 0
 
+        devices.torch_gc()
+
         return res
 
     return modules.ui.wrap_gradio_call(f)