linux/arch/x86/ia32
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
..
audit.c x86: coding style fixes in arch/x86/ia32/audit.c 2008-01-30 13:32:54 +01:00
ia32_aout.c x86: mark associated mm when running a task in 32 bit compatibility mode 2011-03-23 16:36:53 -04:00
ia32_signal.c x86: ia32_signal: introduce {get|set}_user_seg() 2009-02-22 17:54:47 +01:00
ia32entry.S net: Add sendmmsg socket system call 2011-05-05 11:10:14 -07:00
ipc32.c x86: introducing asm/sys_ia32.h 2008-12-29 13:18:40 +01:00
Makefile x86: compat_binfmt_elf 2008-01-30 13:31:55 +01:00
sys_ia32.c BKL: remove extraneous #include <smp_lock.h> 2010-11-17 08:59:32 -08:00