feat(mge): support python -m megengine.distributed.server

GitOrigin-RevId: f1e5c8e3cf441248157060efc04b8ff9a19b154b

imperative/python/megengine/distributed/server.py

@@ -49,7 +49,7 @@ class Methods:
     def set_is_grad(self, key, is_grad):
         """
         Mark send/recv need gradiants by key.
-        
+
         :param key: key to match send/recv op.
         :param is_grad: whether this op need grad.
         """
@@ -61,7 +61,7 @@ class Methods:
     def check_is_grad(self, key):
         """
         Check whether send/recv need gradiants.
-        
+
         :param key: key to match send/recv op.
         """
         with self.lock:
@@ -86,7 +86,7 @@ class Methods:
     def check_remote_tracer(self, key):
         """
         Get tracer dict for send/recv op.
-        
+
         :param key: key to match send/recv op.
         """
         with self.lock:
@@ -99,7 +99,7 @@ class Methods:
     def group_barrier(self, key, size):
         """
         A barrier wait for all group member.
-        
+
         :param key: group key to match each other.
         :param size: group size.
         """
@@ -136,7 +136,7 @@ class ThreadXMLRPCServer(ThreadingMixIn, SimpleXMLRPCServer):
 def _start_server(py_server_port, mm_server_port, queue):
     """
     Start python distributed server and multiple machine server.
-    
+
     :param py_server_port: python server port.
     :param mm_server_port: multiple machine server port.
     :param queue: server port will put in this queue, puts exception when process fails.
@@ -205,7 +205,7 @@ class Client:
     def set_is_grad(self, key, is_grad):
         """
         Mark send/recv need gradiants by key.
-        
+
         :param key: key to match send/recv op.
         :param is_grad: whether this op need grad.
         """
@@ -214,7 +214,7 @@ class Client:
     def check_is_grad(self, key):
         """
         Check whether send/recv need gradiants.
-        
+
         :param key: key to match send/recv op.
         """
         return self.proxy.check_is_grad(key)
@@ -231,7 +231,7 @@ class Client:
     def check_remote_tracer(self, key):
         """
         Get tracer dict for send/recv op.
-        
+
         :param key: key to match send/recv op.
         """
         return self.proxy.check_remote_tracer(key)
@@ -239,7 +239,7 @@ class Client:
     def group_barrier(self, key, size):
         """
         A barrier wait for all group member.
-        
+
         :param key: group key to match each other.
         :param size: group size.
         """
@@ -252,3 +252,22 @@ class Client:
     def user_get(self, key):
         """Get user defined key-value pairs across processes."""
         return self.proxy.user_get(key)
+
+
+def main(port=0, verbose=True):
+    mm_server_port = create_mm_server("0.0.0.0", 0)
+    server = ThreadXMLRPCServer(("0.0.0.0", port), logRequests=verbose)
+    server.register_instance(Methods(mm_server_port))
+    _, port = server.server_address
+    print("serving on port", port)
+    server.serve_forever()
+
+
+if __name__ == "__main__":
+    import argparse
+
+    ap = argparse.ArgumentParser()
+    ap.add_argument("-p", "--port", type=int, default=0)
+    ap.add_argument("-v", "--verbose", type=bool, default=True)
+    args = ap.parse_args()
+    main(port=args.port, verbose=args.verbose)