diff options
| author | Anton Blanchard <anton@samba.org> | 2011-05-02 22:21:35 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-05-05 20:10:14 +0200 |
| commit | 228e548e602061b08ee8e8966f567c12aa079682 (patch) | |
| tree | 4c79ecf071d6174d42da1557812a4646d0aaa5af /arch/powerpc/include/asm/unistd.h | |
| parent | net: call dev_alloc_name from register_netdevice (diff) | |
| download | linux-228e548e602061b08ee8e8966f567c12aa079682.tar.xz linux-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 'arch/powerpc/include/asm/unistd.h')
| -rw-r--r-- | arch/powerpc/include/asm/unistd.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/unistd.h b/arch/powerpc/include/asm/unistd.h index 3c215648ce6d..6d23c8193caa 100644 --- a/arch/powerpc/include/asm/unistd.h +++ b/arch/powerpc/include/asm/unistd.h @@ -371,10 +371,11 @@ #define __NR_open_by_handle_at 346 #define __NR_clock_adjtime 347 #define __NR_syncfs 348 +#define __NR_sendmmsg 349 #ifdef __KERNEL__ -#define __NR_syscalls 349 +#define __NR_syscalls 350 #define __NR__exit __NR_exit #define NR_syscalls __NR_syscalls |