manager: remove preimport stage (#38381)

openpilot/selfdrive/test/process_replay/process_replay.py

@@ -216,7 +216,6 @@ class ProcessContainer:
   def _start_process(self):
     if self.capture is not None:
       self.process.launcher = LauncherWithCapture(self.capture, self.process.launcher)  # ty: ignore[invalid-assignment]  # intentional wrapper
-    self.process.prepare()
     self.process.start()
 
   def start(

openpilot/system/manager/manager.py

@@ -87,11 +87,6 @@ def manager_init() -> None:
                        dirty=build_metadata.openpilot.is_dirty,
                        device=HARDWARE.get_device_type())
 
-  # preimport all processes
-  for p in managed_processes.values():
-    p.prepare()
-
-
 def manager_cleanup() -> None:
   # send signals to kill all procs
   for p in managed_processes.values():

openpilot/system/manager/process.py

@@ -70,10 +70,6 @@ class ManagerProcess(ABC):
   shutting_down = False
   restart_if_crash = False
 
-  @abstractmethod
-  def prepare(self) -> None:
-    pass
-
   @abstractmethod
   def start(self) -> None:
     pass
@@ -150,9 +146,6 @@ class NativeProcess(ManagerProcess):
     self.sigkill = sigkill
     self.launcher = nativelauncher
 
-  def prepare(self) -> None:
-    pass
-
   def start(self) -> None:
     # In case we only tried a non blocking stop we need to stop it before restarting
     if self.shutting_down:
@@ -178,11 +171,6 @@ class PythonProcess(ManagerProcess):
     self.launcher = launcher
     self.restart_if_crash = restart_if_crash
 
-  def prepare(self) -> None:
-    if self.enabled:
-      cloudlog.info(f"preimporting {self.module}")
-      importlib.import_module(self.module)
-
   def start(self) -> None:
     # In case we only tried a non blocking stop we need to stop it before restarting
     if self.shutting_down:
@@ -211,9 +199,6 @@ class DaemonProcess(ManagerProcess):
   def should_run(started, params, CP):
     return True
 
-  def prepare(self) -> None:
-    pass
-
   def start(self) -> None:
     if self.params is None:
       self.params = Params()