linux/arch
Anton Blanchard 228e548e60 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>
2011-05-05 11:10:14 -07:00
..
alpha
arm Merge branch 'rmobile-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6 2011-04-07 12:49:01 -07:00
avr32
blackfin
cris
frv
h8300
ia64
m32r
m68k
microblaze
mips ethtool: Call ethtool's get/set_settings callbacks with cleaned data 2011-04-29 14:01:30 -07:00
mn10300
parisc
powerpc net: Add sendmmsg socket system call 2011-05-05 11:10:14 -07:00
s390 Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6 2011-04-08 07:36:14 -07:00
score
sh Merge branch 'fbdev-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/fbdev-2.6 2011-04-07 12:49:17 -07:00
sparc net: Add sendmmsg socket system call 2011-05-05 11:10:14 -07:00
tile
um
unicore32
x86 net: Add sendmmsg socket system call 2011-05-05 11:10:14 -07:00
xtensa
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