mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-03 09:00:21 +00:00
ping: use the monotonic clock to measure durations
Submitted by: Ján Sučan <sucanjan@gmail.com> MFC after: 2 weeks Sponsored by: Google, inc. (Google Summer of Code 2019) Differential Revision: https://reviews.freebsd.org/D21245
This commit is contained in:
Alan Somers
parent
42bf965528
commit
1ad76f1b60
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=350998
@ -96,6 +96,7 @@ __FBSDID("$FreeBSD$");
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <sysexits.h>
|
||||
#include <time.h>
|
||||
#include <unistd.h>
|
||||
|
||||
#define INADDR_LEN ((int)sizeof(in_addr_t))
|
||||
@ -119,7 +120,7 @@ __FBSDID("$FreeBSD$");
|
||||
|
||||
struct tv32 {
|
||||
int32_t tv32_sec;
|
||||
int32_t tv32_usec;
|
||||
int32_t tv32_nsec;
|
||||
};
|
||||
|
||||
/* various options */
|
||||
@ -217,11 +218,10 @@ static char *pr_addr(struct in_addr);
|
||||
static char *pr_ntime(n_time);
|
||||
static void pr_icmph(struct icmp *);
|
||||
static void pr_iph(struct ip *);
|
||||
static void pr_pack(char *, int, struct sockaddr_in *, struct timeval *);
|
||||
static void pr_pack(char *, int, struct sockaddr_in *, struct timespec *);
|
||||
static void pr_retip(struct ip *);
|
||||
static void status(int);
|
||||
static void stopit(int);
|
||||
static void tvsub(struct timeval *, const struct timeval *);
|
||||
static void usage(void) __dead2;
|
||||
|
||||
int
|
||||
@ -229,7 +229,7 @@ main(int argc, char *const *argv)
|
||||
{
|
||||
struct sockaddr_in from, sock_in;
|
||||
struct in_addr ifaddr;
|
||||
struct timeval last, intvl;
|
||||
struct timespec last, intvl;
|
||||
struct iovec iov;
|
||||
struct ip *ip;
|
||||
struct msghdr msg;
|
||||
@ -247,7 +247,7 @@ main(int argc, char *const *argv)
|
||||
long ltmp;
|
||||
int almost_done, ch, df, hold, i, icmp_len, mib[4], preload;
|
||||
int ssend_errno, srecv_errno, tos, ttl;
|
||||
char ctrl[CMSG_SPACE(sizeof(struct timeval))];
|
||||
char ctrl[CMSG_SPACE(sizeof(struct timespec))];
|
||||
char hnamebuf[MAXHOSTNAMELEN], snamebuf[MAXHOSTNAMELEN];
|
||||
#ifdef IP_OPTIONS
|
||||
char rspace[MAX_IPOPTLEN]; /* record route space */
|
||||
@ -871,19 +871,19 @@ main(int argc, char *const *argv)
|
||||
while (preload--) /* fire off them quickies */
|
||||
pinger();
|
||||
}
|
||||
(void)gettimeofday(&last, NULL);
|
||||
(void)clock_gettime(CLOCK_MONOTONIC, &last);
|
||||
|
||||
if (options & F_FLOOD) {
|
||||
intvl.tv_sec = 0;
|
||||
intvl.tv_usec = 10000;
|
||||
intvl.tv_nsec = 10000000;
|
||||
} else {
|
||||
intvl.tv_sec = interval / 1000;
|
||||
intvl.tv_usec = interval % 1000 * 1000;
|
||||
intvl.tv_nsec = interval % 1000 * 1000000;
|
||||
}
|
||||
|
||||
almost_done = 0;
|
||||
while (!finish_up) {
|
||||
struct timeval now, timeout;
|
||||
struct timespec now, timeout;
|
||||
fd_set rfds;
|
||||
int cc, n;
|
||||
|
||||
@ -892,24 +892,16 @@ main(int argc, char *const *argv)
|
||||
errx(EX_OSERR, "descriptor too large");
|
||||
FD_ZERO(&rfds);
|
||||
FD_SET(srecv, &rfds);
|
||||
(void)gettimeofday(&now, NULL);
|
||||
timeout.tv_sec = last.tv_sec + intvl.tv_sec - now.tv_sec;
|
||||
timeout.tv_usec = last.tv_usec + intvl.tv_usec - now.tv_usec;
|
||||
while (timeout.tv_usec < 0) {
|
||||
timeout.tv_usec += 1000000;
|
||||
timeout.tv_sec--;
|
||||
}
|
||||
while (timeout.tv_usec >= 1000000) {
|
||||
timeout.tv_usec -= 1000000;
|
||||
timeout.tv_sec++;
|
||||
}
|
||||
(void)clock_gettime(CLOCK_MONOTONIC, &now);
|
||||
timespecadd(&last, &intvl, &timeout);
|
||||
timespecsub(&timeout, &now, &timeout);
|
||||
if (timeout.tv_sec < 0)
|
||||
timerclear(&timeout);
|
||||
n = select(srecv + 1, &rfds, NULL, NULL, &timeout);
|
||||
timespecclear(&timeout);
|
||||
n = pselect(srecv + 1, &rfds, NULL, NULL, &timeout, NULL);
|
||||
if (n < 0)
|
||||
continue; /* Must be EINTR. */
|
||||
if (n == 1) {
|
||||
struct timeval *tv = NULL;
|
||||
struct timespec *tv = NULL;
|
||||
#ifdef SO_TIMESTAMP
|
||||
struct cmsghdr *cmsg = (struct cmsghdr *)&ctrl;
|
||||
|
||||
@ -932,7 +924,7 @@ main(int argc, char *const *argv)
|
||||
}
|
||||
#endif
|
||||
if (tv == NULL) {
|
||||
(void)gettimeofday(&now, NULL);
|
||||
(void)clock_gettime(CLOCK_MONOTONIC, &now);
|
||||
tv = &now;
|
||||
}
|
||||
pr_pack((char *)packet, cc, &from, tv);
|
||||
@ -956,17 +948,17 @@ main(int argc, char *const *argv)
|
||||
if (almost_done)
|
||||
break;
|
||||
almost_done = 1;
|
||||
intvl.tv_usec = 0;
|
||||
intvl.tv_nsec = 0;
|
||||
if (nreceived) {
|
||||
intvl.tv_sec = 2 * tmax / 1000;
|
||||
if (!intvl.tv_sec)
|
||||
intvl.tv_sec = 1;
|
||||
} else {
|
||||
intvl.tv_sec = waittime / 1000;
|
||||
intvl.tv_usec = waittime % 1000 * 1000;
|
||||
intvl.tv_nsec = waittime % 1000 * 1000000;
|
||||
}
|
||||
}
|
||||
(void)gettimeofday(&last, NULL);
|
||||
(void)clock_gettime(CLOCK_MONOTONIC, &last);
|
||||
if (ntransmitted - nreceived - 1 > nmissedmax) {
|
||||
nmissedmax = ntransmitted - nreceived - 1;
|
||||
if (options & F_MISSED)
|
||||
@ -1003,13 +995,13 @@ stopit(int sig __unused)
|
||||
* Compose and transmit an ICMP ECHO REQUEST packet. The IP packet
|
||||
* will be added on by the kernel. The ID field is our UNIX process ID,
|
||||
* and the sequence number is an ascending integer. The first TIMEVAL_LEN
|
||||
* bytes of the data portion are used to hold a UNIX "timeval" struct in
|
||||
* bytes of the data portion are used to hold a UNIX "timespec" struct in
|
||||
* host byte-order, to compute the round-trip time.
|
||||
*/
|
||||
static void
|
||||
pinger(void)
|
||||
{
|
||||
struct timeval now;
|
||||
struct timespec now;
|
||||
struct tv32 tv32;
|
||||
struct ip *ip;
|
||||
struct icmp *icp;
|
||||
@ -1027,13 +1019,18 @@ pinger(void)
|
||||
CLR(ntransmitted % mx_dup_ck);
|
||||
|
||||
if ((options & F_TIME) || timing) {
|
||||
(void)gettimeofday(&now, NULL);
|
||||
|
||||
tv32.tv32_sec = htonl(now.tv_sec);
|
||||
tv32.tv32_usec = htonl(now.tv_usec);
|
||||
(void)clock_gettime(CLOCK_MONOTONIC, &now);
|
||||
/*
|
||||
* Truncate seconds down to 32 bits in order
|
||||
* to fit the timestamp within 8 bytes of the
|
||||
* packet. We're only concerned with
|
||||
* durations, not absolute times.
|
||||
*/
|
||||
tv32.tv32_sec = (uint32_t)htonl(now.tv_sec);
|
||||
tv32.tv32_nsec = (uint32_t)htonl(now.tv_nsec);
|
||||
if (options & F_TIME)
|
||||
icp->icmp_otime = htonl((now.tv_sec % (24*60*60))
|
||||
* 1000 + now.tv_usec / 1000);
|
||||
* 1000 + now.tv_nsec / 1000000);
|
||||
if (timing)
|
||||
bcopy((void *)&tv32,
|
||||
(void *)&outpack[ICMP_MINLEN + phdr_len],
|
||||
@ -1079,7 +1076,7 @@ pinger(void)
|
||||
* program to be run without having intermingled output (or statistics!).
|
||||
*/
|
||||
static void
|
||||
pr_pack(char *buf, int cc, struct sockaddr_in *from, struct timeval *tv)
|
||||
pr_pack(char *buf, int cc, struct sockaddr_in *from, struct timespec *tv)
|
||||
{
|
||||
struct in_addr ina;
|
||||
u_char *cp, *dp;
|
||||
@ -1112,7 +1109,7 @@ pr_pack(char *buf, int cc, struct sockaddr_in *from, struct timeval *tv)
|
||||
++nreceived;
|
||||
triptime = 0.0;
|
||||
if (timing) {
|
||||
struct timeval tv1;
|
||||
struct timespec tv1;
|
||||
struct tv32 tv32;
|
||||
#ifndef icmp_data
|
||||
tp = &icp->icmp_ip;
|
||||
@ -1126,10 +1123,10 @@ pr_pack(char *buf, int cc, struct sockaddr_in *from, struct timeval *tv)
|
||||
/* Copy to avoid alignment problems: */
|
||||
memcpy(&tv32, tp, sizeof(tv32));
|
||||
tv1.tv_sec = ntohl(tv32.tv32_sec);
|
||||
tv1.tv_usec = ntohl(tv32.tv32_usec);
|
||||
tvsub(tv, &tv1);
|
||||
tv1.tv_nsec = ntohl(tv32.tv32_nsec);
|
||||
timespecsub(tv, &tv1, tv);
|
||||
triptime = ((double)tv->tv_sec) * 1000.0 +
|
||||
((double)tv->tv_usec) / 1000.0;
|
||||
((double)tv->tv_nsec) / 1000000.0;
|
||||
tsum += triptime;
|
||||
tsumsq += triptime * triptime;
|
||||
if (triptime < tmin)
|
||||
@ -1383,22 +1380,6 @@ in_cksum(u_short *addr, int len)
|
||||
return(answer);
|
||||
}
|
||||
|
||||
/*
|
||||
* tvsub --
|
||||
* Subtract 2 timeval structs: out = out - in. Out is assumed to
|
||||
* be >= in.
|
||||
*/
|
||||
static void
|
||||
tvsub(struct timeval *out, const struct timeval *in)
|
||||
{
|
||||
|
||||
if ((out->tv_usec -= in->tv_usec) < 0) {
|
||||
--out->tv_sec;
|
||||
out->tv_usec += 1000000;
|
||||
}
|
||||
out->tv_sec -= in->tv_sec;
|
||||
}
|
||||
|
||||
/*
|
||||
* status --
|
||||
* Print out statistics when SIGINFO is received.
|
||||
|
||||
Loading…
Reference in New Issue
Block a user