bitbake: hashserv: server: Add support for SO_REUSEPORT

SO_REUSEPORT is a socket option that allows multiple servers to listen
on the same TCP port, and the kernel will automatically load balance the
connections between them. This is particularly helpful for the hash
server since it runs in a single thread. To take advantage of a
multi-core server, multiple servers can be started in parallel with this
option (up to 1 per CPU) and the kernel will load balance between them.

(Bitbake rev: d72d5a7decb489e2af0ebc43cfea0ca3e4353e9b)

Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 27 insertions, 7 deletions

diff --git a/bitbake/lib/bb/asyncrpc/serv.py b/bitbake/lib/bb/asyncrpc/serv.py
index a66117acad..46d54fb511 100644
--- a/bitbake/lib/bb/asyncrpc/serv.py
+++ b/bitbake/lib/bb/asyncrpc/serv.py
@@ -138,14 +138,20 @@ class StreamServer(object):
 
 
 class TCPStreamServer(StreamServer):
-    def __init__(self, host, port, handler, logger):
+    def __init__(self, host, port, handler, logger, *, reuseport=False):
         super().__init__(handler, logger)
         self.host = host
         self.port = port
+        self.reuseport = reuseport
 
     def start(self, loop):
         self.server = loop.run_until_complete(
-            asyncio.start_server(self.handle_stream_client, self.host, self.port)
+            asyncio.start_server(
+                self.handle_stream_client,
+                self.host,
+                self.port,
+                reuse_port=self.reuseport,
+            )
         )
 
         for s in self.server.sockets:
@@ -209,11 +215,12 @@ class UnixStreamServer(StreamServer):
 
 
 class WebsocketsServer(object):
-    def __init__(self, host, port, handler, logger):
+    def __init__(self, host, port, handler, logger, *, reuseport=False):
         self.host = host
         self.port = port
         self.handler = handler
         self.logger = logger
+        self.reuseport = reuseport
 
     def start(self, loop):
         import websockets.server
@@ -224,6 +231,7 @@ class WebsocketsServer(object):
                 self.host,
                 self.port,
                 ping_interval=None,
+                reuse_port=self.reuseport,
             )
         )
 
@@ -262,14 +270,26 @@ class AsyncServer(object):
         self.loop = None
         self.run_tasks = []
 
-    def start_tcp_server(self, host, port):
-        self.server = TCPStreamServer(host, port, self._client_handler, self.logger)
+    def start_tcp_server(self, host, port, *, reuseport=False):
+        self.server = TCPStreamServer(
+            host,
+            port,
+            self._client_handler,
+            self.logger,
+            reuseport=reuseport,
+        )
 
     def start_unix_server(self, path):
         self.server = UnixStreamServer(path, self._client_handler, self.logger)
 
-    def start_websocket_server(self, host, port):
-        self.server = WebsocketsServer(host, port, self._client_handler, self.logger)
+    def start_websocket_server(self, host, port, reuseport=False):
+        self.server = WebsocketsServer(
+            host,
+            port,
+            self._client_handler,
+            self.logger,
+            reuseport=reuseport,
+        )
 
     async def _client_handler(self, socket):
         address = socket.address