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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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228e548e60
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>
64 lines
2.0 KiB
C
64 lines
2.0 KiB
C
#ifndef NET_COMPAT_H
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#define NET_COMPAT_H
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struct sock;
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#if defined(CONFIG_COMPAT)
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#include <linux/compat.h>
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struct compat_msghdr {
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compat_uptr_t msg_name; /* void * */
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compat_int_t msg_namelen;
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compat_uptr_t msg_iov; /* struct compat_iovec * */
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compat_size_t msg_iovlen;
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compat_uptr_t msg_control; /* void * */
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compat_size_t msg_controllen;
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compat_uint_t msg_flags;
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};
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struct compat_mmsghdr {
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struct compat_msghdr msg_hdr;
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compat_uint_t msg_len;
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};
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struct compat_cmsghdr {
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compat_size_t cmsg_len;
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compat_int_t cmsg_level;
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compat_int_t cmsg_type;
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};
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extern int compat_sock_get_timestamp(struct sock *, struct timeval __user *);
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extern int compat_sock_get_timestampns(struct sock *, struct timespec __user *);
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#else /* defined(CONFIG_COMPAT) */
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/*
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* To avoid compiler warnings:
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*/
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#define compat_msghdr msghdr
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#define compat_mmsghdr mmsghdr
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#endif /* defined(CONFIG_COMPAT) */
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extern int get_compat_msghdr(struct msghdr *, struct compat_msghdr __user *);
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extern int verify_compat_iovec(struct msghdr *, struct iovec *, struct sockaddr *, int);
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extern asmlinkage long compat_sys_sendmsg(int,struct compat_msghdr __user *,unsigned);
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extern asmlinkage long compat_sys_sendmmsg(int, struct compat_mmsghdr __user *,
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unsigned, unsigned);
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extern asmlinkage long compat_sys_recvmsg(int,struct compat_msghdr __user *,unsigned);
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extern asmlinkage long compat_sys_recvmmsg(int, struct compat_mmsghdr __user *,
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unsigned, unsigned,
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struct compat_timespec __user *);
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extern asmlinkage long compat_sys_getsockopt(int, int, int, char __user *, int __user *);
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extern int put_cmsg_compat(struct msghdr*, int, int, int, void *);
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extern int cmsghdr_from_user_compat_to_kern(struct msghdr *, struct sock *, unsigned char *, int);
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extern int compat_mc_setsockopt(struct sock *, int, int, char __user *, unsigned int,
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int (*)(struct sock *, int, int, char __user *, unsigned int));
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extern int compat_mc_getsockopt(struct sock *, int, int, char __user *,
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int __user *, int (*)(struct sock *, int, int, char __user *,
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int __user *));
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#endif /* NET_COMPAT_H */
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