chore: import upstream snapshot with attribution

python/paddle/distributed/launch/context/node.py

@@ -0,0 +1,99 @@
+# Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+import random
+import socket
+import struct
+from contextlib import closing
+
+from .device import Device
+
+
+class Node:
+    def __init__(self):
+        # self.device = Device.detect_device()
+        self.device = Device.parse_device()
+        self.ip = self.get_host_ip()
+        self.free_ports = []
+        self._allocated_ports = []
+
+        port_range = os.getenv('PORT_RANGE', '35100:64000')
+        port_range = port_range.split(':')
+        self._port_start = int(port_range[0])
+        self._port_end = int(port_range[1])
+        self._port_cur = random.randint(self._port_start, self._port_end)
+
+    def get_host_ip(self):
+        try:
+            self.hostname = socket.gethostname()
+            self.ip = socket.gethostbyname(socket.getfqdn(self.hostname))
+            return self.ip
+        except:
+            return '127.0.0.1'
+
+    def get_free_ports(self, n=1, rank=0):
+        if os.environ.get('FLAGS_FIXED_PORT') is None:
+            free_ports = [self.get_free_port() for i in range(n)]
+            self.free_ports += free_ports
+        else:
+            start_port = int(os.environ.get('FLAGS_FIXED_PORT'))
+            free_ports = list(
+                range(start_port + rank, start_port + rank + n, 1)
+            )
+            self.free_ports += free_ports
+        return free_ports
+
+    def get_ports_occupied(self):
+        return self.free_ports
+
+    def _get_free_port(self, port=0):
+        with closing(socket.socket(socket.AF_INET, socket.SOCK_STREAM)) as s:
+            s.setsockopt(
+                socket.SOL_SOCKET, socket.SO_LINGER, struct.pack('ii', 1, 0)
+            )
+            try:
+                s.bind(('', port))
+                return s.getsockname()[1]
+            except:
+                return -1
+
+    def _update_port_cur(self):
+        self._port_cur += 1
+        if self._port_cur > self._port_end:
+            self._port_cur = self._port_start
+
+    def get_free_port(self):
+        for _ in range(100):
+            ret = self._get_free_port(self._port_cur)
+            if ret > 0:
+                self._update_port_cur()
+                return ret
+            else:
+                self._update_port_cur()
+
+        return self._port_cur
+
+    @classmethod
+    def is_server_ready(self, ip, port):
+        with closing(socket.socket(socket.AF_INET, socket.SOCK_STREAM)) as sock:
+            # sock.settimeout(0.01)
+            # sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+            if hasattr(socket, 'SO_REUSEPORT'):
+                sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1)
+            result = sock.connect_ex((ip, int(port)))
+            if result == 0:
+                return True
+            else:
+                return False