From 228e548e602061b08ee8e8966f567c12aa079682 Mon Sep 17 00:00:00 2001 From: Anton Blanchard Date: Mon, 2 May 2011 20:21:35 +0000 Subject: 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 Signed-off-by: David S. Miller --- include/linux/syscalls.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux/syscalls.h') diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index 83ecc1749ef..ab71447d0c5 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 *); -- cgit v1.2.3-70-g09d2 From 618e724b8d79c6232daac49cb39b0723bf5c4b08 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Wed, 11 May 2011 14:06:58 -0700 Subject: ns: Declare sys_setns in syscalls.h Ooops I overlooked this one, and missing it causes compile errors of the powerpc syscall. Signed-off-by: Eric W. Biederman --- include/linux/syscalls.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux/syscalls.h') diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index 83ecc1749ef..b8b380443d0 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -844,4 +844,5 @@ asmlinkage long sys_name_to_handle_at(int dfd, const char __user *name, asmlinkage long sys_open_by_handle_at(int mountdirfd, struct file_handle __user *handle, int flags); +asmlinkage long sys_setns(int fd, int nstype); #endif -- cgit v1.2.3-70-g09d2