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ntpd: fix offset adjustment after step; better step printing
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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@ -111,8 +111,8 @@
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#define MAXPOLL 12 /* maximum poll interval (12: 1.1h, 17: 36.4h). std ntpd uses 17 */
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/* Actively lower poll when we see such big offsets.
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* With STEP_THRESHOLD = 0.125, it means we try to sync more aggressively
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* if offset increases over 0.03 sec */
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#define POLLDOWN_OFFSET (STEP_THRESHOLD / 4)
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* if offset increases over ~0.04 sec */
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#define POLLDOWN_OFFSET (STEP_THRESHOLD / 3)
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#define MINDISP 0.01 /* minimum dispersion (sec) */
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#define MAXDISP 16 /* maximum dispersion (sec) */
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#define MAXSTRAT 16 /* maximum stratum (infinity metric) */
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@ -127,9 +127,9 @@
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* we grow a counter: += MINPOLL. When it goes over POLLADJ_LIMIT,
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* we poll_exp++. If offset isn't small, counter -= poll_exp*2,
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* and when it goes below -POLLADJ_LIMIT, we poll_exp--
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* (bumped from 30 to 36 since otherwise I often see poll_exp going *2* steps down)
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* (bumped from 30 to 40 since otherwise I often see poll_exp going *2* steps down)
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*/
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#define POLLADJ_LIMIT 36
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#define POLLADJ_LIMIT 40
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/* If offset < POLLADJ_GATE * discipline_jitter, then we can increase
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* poll interval (we think we can't improve timekeeping
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* by staying at smaller poll).
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@ -622,7 +622,11 @@ reset_peer_stats(peer_t *p, double offset)
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if (small_ofs) {
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p->filter_datapoint[i].d_recv_time += offset;
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if (p->filter_datapoint[i].d_offset != 0) {
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p->filter_datapoint[i].d_offset += offset;
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p->filter_datapoint[i].d_offset -= offset;
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//bb_error_msg("p->filter_datapoint[%d].d_offset %f -> %f",
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// i,
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// p->filter_datapoint[i].d_offset + offset,
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// p->filter_datapoint[i].d_offset);
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}
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} else {
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p->filter_datapoint[i].d_recv_time = G.cur_time;
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@ -808,22 +812,24 @@ step_time(double offset)
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{
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llist_t *item;
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double dtime;
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struct timeval tv;
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char buf[80];
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struct timeval tvc, tvn;
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char buf[sizeof("yyyy-mm-dd hh:mm:ss") + /*paranoia:*/ 4];
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time_t tval;
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gettimeofday(&tv, NULL); /* never fails */
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dtime = offset + tv.tv_sec;
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dtime += 1.0e-6 * tv.tv_usec;
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d_to_tv(dtime, &tv);
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if (settimeofday(&tv, NULL) == -1)
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gettimeofday(&tvc, NULL); /* never fails */
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dtime = tvc.tv_sec + (1.0e-6 * tvc.tv_usec) + offset;
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d_to_tv(dtime, &tvn);
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if (settimeofday(&tvn, NULL) == -1)
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bb_perror_msg_and_die("settimeofday");
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tval = tv.tv_sec;
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strftime(buf, sizeof(buf), "%a %b %e %H:%M:%S %Z %Y", localtime(&tval));
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bb_error_msg("setting clock to %s (offset %fs)", buf, offset);
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VERB2 {
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tval = tvc.tv_sec;
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strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", localtime(&tval));
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bb_error_msg("current time is %s.%06u", buf, (unsigned)tvc.tv_usec);
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}
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tval = tvn.tv_sec;
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strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", localtime(&tval));
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bb_error_msg("setting time to %s.%06u (offset %+fs)", buf, (unsigned)tvn.tv_usec, offset);
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/* Correct various fields which contain time-relative values: */
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