Software / code / prosody
Diff
net/server_epoll.lua @ 12512:b7f07585ec4c
net.server_epoll: Add support for TCP Fast Open
Requires a patch to LuaSocket adding this socket option,
https://github.com/lunarmodules/luasocket/pull/378
sysctl tweaks
net.ipv4.tcp_fastopen=3
net.ipv4.tcp_fastopen_blackhole_timeout_sec = 0
net.ipv4.tcp_fastopen_key=$(</proc/sys/kernel/random/uuid)
Disabled by default since it an advanced performance tweak unlikely to
be needed by most servers.
| author | Kim Alvefur <zash@zash.se> |
|---|---|
| date | Thu, 08 Jul 2021 12:29:50 +0200 |
| parent | 12481:2ee27587fec7 |
| child | 12513:6efbcd52db21 |
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line diff
--- a/net/server_epoll.lua Mon May 16 14:51:58 2022 +0200 +++ b/net/server_epoll.lua Thu Jul 08 12:29:50 2021 +0200 @@ -92,6 +92,9 @@ --- How long to wait after getting the shutdown signal before forcefully tearing down every socket shutdown_deadline = 5; + + -- TCP Fast Open + tcp_fastopen = false; }}; local cfg = default_config.__index; @@ -906,6 +909,9 @@ log = logger.init(("serv%s"):format(new_id())); }, interface_mt); server:debug("Server %s created", server); + if cfg.tcp_fastopen then + server:setoption("tcp-fastopen", cfg.tcp_fastopen); + end server:add(true, false); return server; end @@ -962,6 +968,9 @@ if not conn then return conn, err; end local ok, err = conn:settimeout(0); if not ok then return ok, err; end + if cfg.tcp_fastopen then + pcall(conn.setoption, conn, "tcp-fastopen-connect", 1); + end local ok, err = conn:setpeername(addr, port); if not ok and err ~= "timeout" then return ok, err; end local client = wrapsocket(conn, nil, read_size, listeners, tls_ctx, extra)
