summaryrefslogtreecommitdiff
path: root/include
diff options
context:
space:
mode:
authorAnton Blanchard <anton@samba.org>2011-05-03 00:21:35 +0400
committerDavid S. Miller <davem@davemloft.net>2011-05-05 22:10:14 +0400
commit228e548e602061b08ee8e8966f567c12aa079682 (patch)
tree4c79ecf071d6174d42da1557812a4646d0aaa5af /include
parent1c5cae815d19ffe02bdfda1260949ef2b1806171 (diff)
downloadlinux-228e548e602061b08ee8e8966f567c12aa079682.tar.xz
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 'include')
-rw-r--r--include/linux/net.h1
-rw-r--r--include/linux/socket.h2
-rw-r--r--include/linux/syscalls.h2
-rw-r--r--include/net/compat.h2
4 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/net.h b/include/linux/net.h
index 94de83c0f877..1da55e9b6f01 100644
--- a/include/linux/net.h
+++ b/include/linux/net.h
@@ -42,6 +42,7 @@
#define SYS_RECVMSG 17 /* sys_recvmsg(2) */
#define SYS_ACCEPT4 18 /* sys_accept4(2) */
#define SYS_RECVMMSG 19 /* sys_recvmmsg(2) */
+#define SYS_SENDMMSG 20 /* sys_sendmmsg(2) */
typedef enum {
SS_FREE = 0, /* not allocated */
diff --git a/include/linux/socket.h b/include/linux/socket.h
index d2b5e982f079..4ef98e422fde 100644
--- a/include/linux/socket.h
+++ b/include/linux/socket.h
@@ -333,5 +333,7 @@ struct timespec;
extern int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen,
unsigned int flags, struct timespec *timeout);
+extern int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg,
+ unsigned int vlen, unsigned int flags);
#endif /* not kernel and not glibc */
#endif /* _LINUX_SOCKET_H */
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 83ecc1749ef6..ab71447d0c5a 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 *);
diff --git a/include/net/compat.h b/include/net/compat.h
index 28d5428ec6a2..9ee75edcc295 100644
--- a/include/net/compat.h
+++ b/include/net/compat.h
@@ -43,6 +43,8 @@ extern int compat_sock_get_timestampns(struct sock *, struct timespec __user *);
extern int get_compat_msghdr(struct msghdr *, struct compat_msghdr __user *);
extern int verify_compat_iovec(struct msghdr *, struct iovec *, struct sockaddr *, int);
extern asmlinkage long compat_sys_sendmsg(int,struct compat_msghdr __user *,unsigned);
+extern asmlinkage long compat_sys_sendmmsg(int, struct compat_mmsghdr __user *,
+ unsigned, unsigned);
extern asmlinkage long compat_sys_recvmsg(int,struct compat_msghdr __user *,unsigned);
extern asmlinkage long compat_sys_recvmmsg(int, struct compat_mmsghdr __user *,
unsigned, unsigned,