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Code Issues Releases Wiki Activity

netlink-socket: Make caller provide message receive buffers.

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Typically an nl_sock client can stack-allocate the buffer for receiving
a Netlink message, which provides a performance boost.

Signed-off-by: Ben Pfaff <blp@nicira.com>
This commit is contained in:
Ben Pfaff
2012-04-09 15:35:29 -07:00
parent 8843668ae5
commit 72d32ac0b3
6 changed files with 210 additions and 172 deletions
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10
lib/netlink-notifier.c
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@@ -1,5 +1,5 @@
/*
* Copyright (c) 2009, 2010, 2011 Nicira Networks.
* Copyright (c) 2009, 2010, 2011, 2012 Nicira Networks.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -164,18 +164,20 @@ nln_run(struct nln *nln)
nln->has_run = true;
for (;;) {
struct ofpbuf *buf;
uint64_t buf_stub[4096 / 8];
struct ofpbuf buf;
int error;
ofpbuf_use_stub(&buf, buf_stub, sizeof buf_stub);
error = nl_sock_recv(nln->notify_sock, &buf, false);
if (!error) {
if (nln->parse(buf, nln->change)) {
if (nln->parse(&buf, nln->change)) {
nln_report(nln, nln->change);
} else {
VLOG_WARN_RL(&rl, "received bad netlink message");
nln_report(nln, NULL);
}
ofpbuf_delete(buf);
ofpbuf_uninit(&buf);
} else if (error == EAGAIN) {
return;
} else {