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| 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 /arch/x86 | |
| parent | 1c5cae815d19ffe02bdfda1260949ef2b1806171 (diff) | |
| download | linux-228e548e602061b08ee8e8966f567c12aa079682.tar.gz linux-228e548e602061b08ee8e8966f567c12aa079682.tar.bz2 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/x86')
| -rw-r--r-- | arch/x86/ia32/ia32entry.S | 1 | ||||
| -rw-r--r-- | arch/x86/include/asm/unistd_32.h | 3 | ||||
| -rw-r--r-- | arch/x86/include/asm/unistd_64.h | 2 | ||||
| -rw-r--r-- | arch/x86/kernel/syscall_table_32.S | 1 |
4 files changed, 6 insertions, 1 deletions
diff --git a/arch/x86/ia32/ia32entry.S b/arch/x86/ia32/ia32entry.S index 849a9d23c71d..95f5826be458 100644 --- a/arch/x86/ia32/ia32entry.S +++ b/arch/x86/ia32/ia32entry.S @@ -848,4 +848,5 @@ ia32_sys_call_table: .quad compat_sys_open_by_handle_at .quad compat_sys_clock_adjtime .quad sys_syncfs + .quad compat_sys_sendmmsg /* 345 */ ia32_syscall_end: diff --git a/arch/x86/include/asm/unistd_32.h b/arch/x86/include/asm/unistd_32.h index a755ef5e5977..fb6a625c99bf 100644 --- a/arch/x86/include/asm/unistd_32.h +++ b/arch/x86/include/asm/unistd_32.h @@ -350,10 +350,11 @@ #define __NR_open_by_handle_at 342 #define __NR_clock_adjtime 343 #define __NR_syncfs 344 +#define __NR_sendmmsg 345 #ifdef __KERNEL__ -#define NR_syscalls 345 +#define NR_syscalls 346 #define __ARCH_WANT_IPC_PARSE_VERSION #define __ARCH_WANT_OLD_READDIR diff --git a/arch/x86/include/asm/unistd_64.h b/arch/x86/include/asm/unistd_64.h index 160fa76bd578..79f90eb15aad 100644 --- a/arch/x86/include/asm/unistd_64.h +++ b/arch/x86/include/asm/unistd_64.h @@ -677,6 +677,8 @@ __SYSCALL(__NR_open_by_handle_at, sys_open_by_handle_at) __SYSCALL(__NR_clock_adjtime, sys_clock_adjtime) #define __NR_syncfs 306 __SYSCALL(__NR_syncfs, sys_syncfs) +#define __NR_sendmmsg 307 +__SYSCALL(__NR_sendmmsg, sys_sendmmsg) #ifndef __NO_STUBS #define __ARCH_WANT_OLD_READDIR diff --git a/arch/x86/kernel/syscall_table_32.S b/arch/x86/kernel/syscall_table_32.S index abce34d5c79d..32cbffb0c494 100644 --- a/arch/x86/kernel/syscall_table_32.S +++ b/arch/x86/kernel/syscall_table_32.S @@ -344,3 +344,4 @@ ENTRY(sys_call_table) .long sys_open_by_handle_at .long sys_clock_adjtime .long sys_syncfs + .long sys_sendmmsg /* 345 */ |