ui: measure ui state time in CPU time (#37983)

* all

* rename

selfdrive/ui/ui.py

@@ -1,5 +1,6 @@
 #!/usr/bin/env python3
 import os
+import time
 
 from cereal import messaging
 from openpilot.system.hardware import TICI
@@ -24,14 +25,10 @@ def main():
 
   pm = messaging.PubMaster(['uiDebug'])
   for should_render, frame_time, cpu_time in gui_app.render():
+    extra_start = time.monotonic()
     ui_state.update()
 
     if should_render:
-      msg = messaging.new_message('uiDebug')
-      msg.uiDebug.cpuTimeMillis = cpu_time * 1000
-      msg.uiDebug.frameTimeMillis = frame_time * 1000
-      pm.send('uiDebug', msg)
-
       # reaffine after power save offlines our core
       if TICI and os.sched_getaffinity(0) != cores:
         try:
@@ -39,6 +36,12 @@ def main():
         except OSError:
           pass
 
+      extra_cpu = time.monotonic() - extra_start
+      msg = messaging.new_message('uiDebug')
+      msg.uiDebug.cpuTimeMillis = (cpu_time + extra_cpu) * 1000
+      msg.uiDebug.frameTimeMillis = frame_time * 1000
+      pm.send('uiDebug', msg)
+
 
 if __name__ == "__main__":
   main()