void
PrecisionRecallM::addStopTime() {
struct timeval end, elapsed;
gettimeofday(&end, NULL);
TIMEVAL_SUB(&end, &begin, &elapsed);
t += elapsed.tv_sec * 1000000 + elapsed.tv_usec;
}
struct timeval *
rtadvd_timer_rest(struct rtadvd_timer *rat)
{
static struct timeval returnval, now;
gettimeofday(&now, NULL);
if (TIMEVAL_LEQ(&rat->rat_tm, &now)) {
syslog(LOG_DEBUG,
"<%s> a timer must be expired, but not yet",
__func__);
returnval.tv_sec = returnval.tv_usec = 0;
}
else
TIMEVAL_SUB(&rat->rat_tm, &now, &returnval);
return (&returnval);
}
int main(int argc, char *argv[])
{
int fd;
struct sockaddr_in locAddr;
struct sockaddr_in remAddr;
socklen_t remAddrLen;
ssize_t nBytes;
static char buf[PRIORITY_MESSAGE_SIZE_BYTES];
int msgCnt;
parse_options(argc, argv);
if (opt_help)
usage();
if (opt_port == 0)
opt_port = PRIORITY_PORT_DEFAULT;
if (opt_prio != 0)
{
struct sched_param param;
memset(¶m, 0, sizeof(param));
param.sched_priority = opt_prio;
/* SCHED_RR introduces lots of jitter */
if (sched_setscheduler(0, SCHED_FIFO, ¶m) != 0)
{
perror("sched_setscheduler");
exit(1);
}
}
fd = socket(AF_INET, SOCK_DGRAM, 0);
if (fd == -1)
{
perror("socket");
exit(1);
}
memset(&locAddr, 0, sizeof(locAddr));
locAddr.sin_family = AF_INET;
locAddr.sin_addr.s_addr = htonl(INADDR_ANY);
locAddr.sin_port = htons(opt_port);
if (bind(fd, (struct sockaddr *)&locAddr, sizeof(locAddr)) != 0)
{
perror("bind");
close(fd);
exit(1);
}
for (msgCnt = 0; msgCnt < MESSAGE_CNT; msgCnt++)
{
memset(&remAddr, 0, sizeof(remAddr));
remAddrLen = sizeof(remAddr);
nBytes = recvfrom(fd, buf, sizeof(buf), 0,
(struct sockaddr *)&remAddr, &remAddrLen);
if (nBytes < 0)
{
perror("recv");
close(fd);
exit(1);
}
/* message arrival time */
if (gettimeofday(&msgTimevals[msgCnt], NULL) != 0)
{
perror("gettimeofday");
close(fd);
exit(1);
}
if (opt_verbose)
printf("message received\n");
} /* for (msgCnt...) */
/* convert all times to useconds after the first message */
for (msgCnt = 0; msgCnt < MESSAGE_CNT; msgCnt++)
TIMEVAL_SUB(msgTimes[msgCnt], msgTimevals[msgCnt], msgTimevals[0]);
/* fit line to samples 1..(MESSAGE_CNT-1)
* http://faculty.cs.niu.edu/~hutchins/csci230/best-fit.htm
*/
{
double sumX = 0.0;
double sumY = 0.0;
double sumX2 = 0.0;
double sumXY = 0.0;
double xMean, yMean, slope, yInt;
double jLo, jHi, jSum;
for (msgCnt = 1; msgCnt < MESSAGE_CNT; msgCnt++)
{
sumX += msgCnt;
sumY += msgTimes[msgCnt];
sumX2 += (msgCnt * msgCnt);
sumXY += ((double)msgCnt * (double)msgTimes[msgCnt]);
}
xMean = sumX / (MESSAGE_CNT - 1);
yMean = sumY / (MESSAGE_CNT - 1);
slope = (sumXY - sumX * yMean) / (sumX2 - sumX * xMean);
yInt = yMean - slope * xMean;
/* find max jitter */
jLo = 0.0;
jHi = 0.0;
jSum = 0.0;
for (msgCnt = 1; msgCnt < MESSAGE_CNT; msgCnt++)
{
double j = msgTimes[msgCnt] - (slope * msgCnt + yInt);
if (jLo > j)
jLo = j;
if (jHi < j)
jHi = j;
if (j < 0)
j = -j;
jSum += j;
}
printf("jitter: %0.1f...%0.1f usec\n", jLo, jHi);
printf(" %0.1f avg\n", jSum / (MESSAGE_CNT - 1));
}
exit(0);
} /* main */
static struct timeval *
rtsol_check_timer(void)
{
static struct timeval returnval;
struct timeval now, rtsol_timer;
struct ifinfo *ifinfo;
int flags;
gettimeofday(&now, NULL);
rtsol_timer = tm_max;
for (ifinfo = iflist; ifinfo; ifinfo = ifinfo->next) {
if (TIMEVAL_LEQ(ifinfo->expire, now)) {
if (dflag > 1)
warnmsg(LOG_DEBUG, __func__,
"timer expiration on %s, "
"state = %d", ifinfo->ifname,
ifinfo->state);
switch (ifinfo->state) {
case IFS_DOWN:
case IFS_TENTATIVE:
/* interface_up returns 0 on success */
flags = interface_up(ifinfo->ifname);
if (flags == 0)
ifinfo->state = IFS_DELAY;
else if (flags == IFS_TENTATIVE)
ifinfo->state = IFS_TENTATIVE;
else
ifinfo->state = IFS_DOWN;
break;
case IFS_IDLE:
{
int oldstatus = ifinfo->active;
int probe = 0;
ifinfo->active =
interface_status(ifinfo);
if (oldstatus != ifinfo->active) {
warnmsg(LOG_DEBUG, __func__,
"%s status is changed"
" from %d to %d",
ifinfo->ifname,
oldstatus, ifinfo->active);
probe = 1;
ifinfo->state = IFS_DELAY;
}
else if (ifinfo->probeinterval &&
(ifinfo->probetimer -=
ifinfo->timer.tv_sec) <= 0) {
/* probe timer expired */
ifinfo->probetimer =
ifinfo->probeinterval;
probe = 1;
ifinfo->state = IFS_PROBE;
}
if (probe && mobile_node)
defrouter_probe(ifinfo->sdl->sdl_index);
break;
}
case IFS_DELAY:
ifinfo->state = IFS_PROBE;
sendpacket(ifinfo);
break;
case IFS_PROBE:
if (ifinfo->probes < MAX_RTR_SOLICITATIONS)
sendpacket(ifinfo);
else {
warnmsg(LOG_INFO, __func__,
"No answer "
"after sending %d RSs",
ifinfo->probes);
ifinfo->probes = 0;
ifinfo->state = IFS_IDLE;
}
break;
}
rtsol_timer_update(ifinfo);
}
if (TIMEVAL_LT(ifinfo->expire, rtsol_timer))
rtsol_timer = ifinfo->expire;
}
if (TIMEVAL_EQ(rtsol_timer, tm_max)) {
warnmsg(LOG_DEBUG, __func__, "there is no timer");
return(NULL);
}
else if (TIMEVAL_LT(rtsol_timer, now))
/* this may occur when the interval is too small */
returnval.tv_sec = returnval.tv_usec = 0;
else
TIMEVAL_SUB(&rtsol_timer, &now, &returnval);
if (dflag > 1)
warnmsg(LOG_DEBUG, __func__, "New timer is %ld:%08ld",
(long)returnval.tv_sec, (long)returnval.tv_usec);
return(&returnval);
}
