diff options
| author | Anton Blanchard <anton@samba.org> | 2011-05-02 20:21:35 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-05-05 11:10:14 -0700 |
| commit | 228e548e602061b08ee8e8966f567c12aa079682 (patch) | |
| tree | 4c79ecf071d6174d42da1557812a4646d0aaa5af /include/linux/syscalls.h | |
| parent | 1c5cae815d19ffe02bdfda1260949ef2b1806171 (diff) | |
| download | lwn-228e548e602061b08ee8e8966f567c12aa079682.tar.gz lwn-228e548e602061b08ee8e8966f567c12aa079682.zip | |
net: Add sendmmsg socket system call
This patch adds a multiple message send syscall and is the send
version of the existing recvmmsg syscall. This is heavily
based on the patch by Arnaldo that added recvmmsg.
I wrote a microbenchmark to test the performance gains of using
this new syscall:
http://ozlabs.org/~anton/junkcode/sendmmsg_test.c
The test was run on a ppc64 box with a 10 Gbit network card. The
benchmark can send both UDP and RAW ethernet packets.
64B UDP
batch pkts/sec
1 804570
2 872800 (+ 8 %)
4 916556 (+14 %)
8 939712 (+17 %)
16 952688 (+18 %)
32 956448 (+19 %)
64 964800 (+20 %)
64B raw socket
batch pkts/sec
1 1201449
2 1350028 (+12 %)
4 1461416 (+22 %)
8 1513080 (+26 %)
16 1541216 (+28 %)
32 1553440 (+29 %)
64 1557888 (+30 %)
We see a 20% improvement in throughput on UDP send and 30%
on raw socket send.
[ Add sparc syscall entries. -DaveM ]
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/syscalls.h')
| -rw-r--r-- | include/linux/syscalls.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index 83ecc1749ef6..ab71447d0c5a 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -610,6 +610,8 @@ asmlinkage long sys_send(int, void __user *, size_t, unsigned); asmlinkage long sys_sendto(int, void __user *, size_t, unsigned, struct sockaddr __user *, int); asmlinkage long sys_sendmsg(int fd, struct msghdr __user *msg, unsigned flags); +asmlinkage long sys_sendmmsg(int fd, struct mmsghdr __user *msg, + unsigned int vlen, unsigned flags); asmlinkage long sys_recv(int, void __user *, size_t, unsigned); asmlinkage long sys_recvfrom(int, void __user *, size_t, unsigned, struct sockaddr __user *, int __user *); |