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Introduce the SO_BINTIME option which takes a high-resolution timestamp

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at packet arrival.

For benchmarking purposes SO_BINTIME is preferable to SO_TIMEVAL
since it has higher resolution and lower overhead.  Simultaneous
use of the two options is possible and they will return consistent
timestamps.

This introduces an extra test and a function call for SO_TIMEVAL, but I have
not been able to measure that.
This commit is contained in:
Poul-Henning Kamp 2004-01-31 10:40:25 +00:00
parent f191a0bcf6
commit be8a62e821
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=125264
4 changed files with 23 additions and 8 deletions
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2
sys/kern/uipc_socket.c
View File

@ -1357,6 +1357,7 @@ sosetopt(so, sopt)
case SO_REUSEPORT:
case SO_OOBINLINE:
case SO_TIMESTAMP:
case SO_BINTIME:
case SO_NOSIGPIPE:
error = sooptcopyin(sopt, &optval, sizeof optval,
sizeof optval);
@ -1555,6 +1556,7 @@ sogetopt(so, sopt)
case SO_BROADCAST:
case SO_OOBINLINE:
case SO_TIMESTAMP:
case SO_BINTIME:
case SO_NOSIGPIPE:
optval = so->so_options & sopt->sopt_name;
integer:

25
sys/netinet/ip_input.c
View File

@ -2062,14 +2062,25 @@ ip_savecontrol(inp, mp, ip, m)
register struct ip *ip;
register struct mbuf *m;
{
if (inp->inp_socket->so_options & SO_TIMESTAMP) {
struct timeval tv;
if (inp->inp_socket->so_options & (SO_BINTIME | SO_TIMESTAMP)) {
struct bintime bt;
microtime(&tv);
*mp = sbcreatecontrol((caddr_t) &tv, sizeof(tv),
SCM_TIMESTAMP, SOL_SOCKET);
if (*mp)
mp = &(*mp)->m_next;
bintime(&bt);
if (inp->inp_socket->so_options & SO_BINTIME) {
*mp = sbcreatecontrol((caddr_t) &bt, sizeof(bt),
SCM_BINTIME, SOL_SOCKET);
if (*mp)
mp = &(*mp)->m_next;
}
if (inp->inp_socket->so_options & SO_TIMESTAMP) {
struct timeval tv;
bintime2timeval(&bt, &tv);
*mp = sbcreatecontrol((caddr_t) &tv, sizeof(tv),
SCM_TIMESTAMP, SOL_SOCKET);
if (*mp)
mp = &(*mp)->m_next;
}
}
if (inp->inp_flags & INP_RECVDSTADDR) {
*mp = sbcreatecontrol((caddr_t) &ip->ip_dst,

2
sys/netinet/udp_usrreq.c
View File

@ -475,7 +475,7 @@ udp_append(last, ip, n, off)
}
#endif
if (last->inp_flags & INP_CONTROLOPTS ||
last->inp_socket->so_options & SO_TIMESTAMP) {
last->inp_socket->so_options & (SO_TIMESTAMP | SO_BINTIME)) {
#ifdef INET6
if (last->inp_vflag & INP_IPV6) {
int savedflags;

2
sys/sys/socket.h
View File

@ -120,6 +120,7 @@ typedef __uid_t uid_t;
#define SO_TIMESTAMP 0x0400 /* timestamp received dgram traffic */
#define SO_NOSIGPIPE 0x0800 /* no SIGPIPE from EPIPE */
#define SO_ACCEPTFILTER 0x1000 /* there is an accept filter */
#define SO_BINTIME 0x2000 /* timestamp received dgram traffic */
#endif
/*
@ -462,6 +463,7 @@ struct cmsgcred {
#if __BSD_VISIBLE
#define SCM_TIMESTAMP 0x02 /* timestamp (struct timeval) */
#define SCM_CREDS 0x03 /* process creds (struct cmsgcred) */
#define SCM_BINTIME 0x04 /* timestamp (struct bintime) */
#endif
#if __BSD_VISIBLE