[git commit] ntpd: promote log level 3 to production
Denys Vlasenko
vda.linux at googlemail.com
Wed Dec 4 15:32:09 UTC 2013
commit: http://git.busybox.net/busybox/commit/?id=a14958c69da798e2284e8ab29492bdbdd52a2278
branch: http://git.busybox.net/busybox/commit/?id=refs/heads/master
Without it, peer selection logic is hard to debug
function old new delta
update_local_clock 861 982 +121
select_and_cluster 962 1065 +103
common_ping_main 1788 1821 +33
huft_build 1287 1296 +9
chpst_main 708 704 -4
INET6_resolve 127 119 -8
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 4/2 up/down: 266/-12) Total: 254 bytes
Signed-off-by: Denys Vlasenko <vda.linux at googlemail.com>
---
networking/ntpd.c | 99 +++++++++++++++++++++++++++++------------------------
1 files changed, 54 insertions(+), 45 deletions(-)
diff --git a/networking/ntpd.c b/networking/ntpd.c
index 13cca3e..aeef043 100644
--- a/networking/ntpd.c
+++ b/networking/ntpd.c
@@ -57,10 +57,10 @@
/* Verbosity control (max level of -dddd options accepted).
- * max 5 is very talkative (and bloated). 2 is non-bloated,
+ * max 6 is very talkative (and bloated). 3 is non-bloated,
* production level setting.
*/
-#define MAX_VERBOSE 2
+#define MAX_VERBOSE 3
/* High-level description of the algorithm:
@@ -367,6 +367,7 @@ static const int const_IPTOS_LOWDELAY = IPTOS_LOWDELAY;
#define VERB3 if (MAX_VERBOSE >= 3 && G.verbose >= 3)
#define VERB4 if (MAX_VERBOSE >= 4 && G.verbose >= 4)
#define VERB5 if (MAX_VERBOSE >= 5 && G.verbose >= 5)
+#define VERB6 if (MAX_VERBOSE >= 6 && G.verbose >= 6)
static double LOG2D(int a)
@@ -568,7 +569,7 @@ filter_datapoints(peer_t *p)
got_newest = 0;
sum = 0;
for (i = 0; i < NUM_DATAPOINTS; i++) {
- VERB4 {
+ VERB5 {
bb_error_msg("datapoint[%d]: off:%f disp:%f(%f) age:%f%s",
i,
fdp[idx].d_offset,
@@ -665,7 +666,7 @@ filter_datapoints(peer_t *p)
sum = SQRT(sum / NUM_DATAPOINTS);
p->filter_jitter = sum > G_precision_sec ? sum : G_precision_sec;
- VERB3 bb_error_msg("filter offset:%+f disp:%f jitter:%f",
+ VERB4 bb_error_msg("filter offset:%+f disp:%f jitter:%f",
p->filter_offset,
p->filter_dispersion,
p->filter_jitter);
@@ -700,7 +701,7 @@ reset_peer_stats(peer_t *p, double offset)
p->lastpkt_recv_time = G.cur_time;
}
filter_datapoints(p); /* recalc p->filter_xxx */
- VERB5 bb_error_msg("%s->lastpkt_recv_time=%f", p->p_dotted, p->lastpkt_recv_time);
+ VERB6 bb_error_msg("%s->lastpkt_recv_time=%f", p->p_dotted, p->lastpkt_recv_time);
}
static void
@@ -972,20 +973,20 @@ fit(peer_t *p, double rd)
{
if ((p->reachable_bits & (p->reachable_bits-1)) == 0) {
/* One or zero bits in reachable_bits */
- VERB3 bb_error_msg("peer %s unfit for selection: unreachable", p->p_dotted);
+ VERB4 bb_error_msg("peer %s unfit for selection: unreachable", p->p_dotted);
return 0;
}
#if 0 /* we filter out such packets earlier */
if ((p->lastpkt_status & LI_ALARM) == LI_ALARM
|| p->lastpkt_stratum >= MAXSTRAT
) {
- VERB3 bb_error_msg("peer %s unfit for selection: bad status/stratum", p->p_dotted);
+ VERB4 bb_error_msg("peer %s unfit for selection: bad status/stratum", p->p_dotted);
return 0;
}
#endif
/* rd is root_distance(p) */
if (rd > MAXDIST + FREQ_TOLERANCE * (1 << G.poll_exp)) {
- VERB3 bb_error_msg("peer %s unfit for selection: root distance too high", p->p_dotted);
+ VERB4 bb_error_msg("peer %s unfit for selection: root distance too high", p->p_dotted);
return 0;
}
//TODO
@@ -1025,7 +1026,7 @@ select_and_cluster(void)
continue;
}
- VERB4 bb_error_msg("interval: [%f %f %f] %s",
+ VERB5 bb_error_msg("interval: [%f %f %f] %s",
offset - rd,
offset,
offset + rd,
@@ -1050,7 +1051,7 @@ select_and_cluster(void)
}
num_candidates = num_points / 3;
if (num_candidates == 0) {
- VERB3 bb_error_msg("no valid datapoints, no peer selected");
+ VERB3 bb_error_msg("no valid datapoints%s", ", no peer selected");
return NULL;
}
//TODO: sorting does not seem to be done in reference code
@@ -1108,12 +1109,13 @@ select_and_cluster(void)
break;
num_falsetickers++;
if (num_falsetickers * 2 >= num_candidates) {
- VERB3 bb_error_msg("too many falsetickers:%d (candidates:%d), no peer selected",
- num_falsetickers, num_candidates);
+ VERB3 bb_error_msg("falsetickers:%d, candidates:%d%s",
+ num_falsetickers, num_candidates,
+ ", no peer selected");
return NULL;
}
}
- VERB3 bb_error_msg("selected interval: [%f, %f]; candidates:%d falsetickers:%d",
+ VERB4 bb_error_msg("selected interval: [%f, %f]; candidates:%d falsetickers:%d",
low, high, num_candidates, num_falsetickers);
/* Clustering */
@@ -1131,7 +1133,7 @@ select_and_cluster(void)
survivor[num_survivors].p = p;
/* x.opt_rd == root_distance(p); */
survivor[num_survivors].metric = MAXDIST * p->lastpkt_stratum + point[i].opt_rd;
- VERB4 bb_error_msg("survivor[%d] metric:%f peer:%s",
+ VERB5 bb_error_msg("survivor[%d] metric:%f peer:%s",
num_survivors, survivor[num_survivors].metric, p->p_dotted);
num_survivors++;
}
@@ -1141,8 +1143,9 @@ select_and_cluster(void)
* is acceptable.
*/
if (num_survivors < MIN_SELECTED) {
- VERB3 bb_error_msg("num_survivors %d < %d, no peer selected",
- num_survivors, MIN_SELECTED);
+ VERB3 bb_error_msg("survivors:%d%s",
+ num_survivors,
+ ", no peer selected");
return NULL;
}
@@ -1162,7 +1165,7 @@ select_and_cluster(void)
double min_jitter = min_jitter;
if (num_survivors <= MIN_CLUSTERED) {
- VERB3 bb_error_msg("num_survivors %d <= %d, not discarding more",
+ VERB4 bb_error_msg("num_survivors %d <= %d, not discarding more",
num_survivors, MIN_CLUSTERED);
break;
}
@@ -1188,11 +1191,11 @@ select_and_cluster(void)
max_selection_jitter = selection_jitter_sq;
max_idx = i;
}
- VERB5 bb_error_msg("survivor %d selection_jitter^2:%f",
+ VERB6 bb_error_msg("survivor %d selection_jitter^2:%f",
i, selection_jitter_sq);
}
max_selection_jitter = SQRT(max_selection_jitter / num_survivors);
- VERB4 bb_error_msg("max_selection_jitter (at %d):%f min_jitter:%f",
+ VERB5 bb_error_msg("max_selection_jitter (at %d):%f min_jitter:%f",
max_idx, max_selection_jitter, min_jitter);
/* If the maximum selection jitter is less than the
@@ -1201,7 +1204,7 @@ select_and_cluster(void)
* as well stop.
*/
if (max_selection_jitter < min_jitter) {
- VERB3 bb_error_msg("max_selection_jitter:%f < min_jitter:%f, num_survivors:%d, not discarding more",
+ VERB4 bb_error_msg("max_selection_jitter:%f < min_jitter:%f, num_survivors:%d, not discarding more",
max_selection_jitter, min_jitter, num_survivors);
break;
}
@@ -1209,7 +1212,7 @@ select_and_cluster(void)
/* Delete survivor[max_idx] from the list
* and go around again.
*/
- VERB5 bb_error_msg("dropping survivor %d", max_idx);
+ VERB6 bb_error_msg("dropping survivor %d", max_idx);
num_survivors--;
while (max_idx < num_survivors) {
survivor[max_idx] = survivor[max_idx + 1];
@@ -1251,7 +1254,7 @@ select_and_cluster(void)
/* Starting from 1 is ok here */
for (i = 1; i < num_survivors; i++) {
if (G.last_update_peer == survivor[i].p) {
- VERB4 bb_error_msg("keeping old synced peer");
+ VERB5 bb_error_msg("keeping old synced peer");
p = G.last_update_peer;
goto keep_old;
}
@@ -1259,7 +1262,7 @@ select_and_cluster(void)
}
G.last_update_peer = p;
keep_old:
- VERB3 bb_error_msg("selected peer %s filter_offset:%+f age:%f",
+ VERB4 bb_error_msg("selected peer %s filter_offset:%+f age:%f",
p->p_dotted,
p->filter_offset,
G.cur_time - p->lastpkt_recv_time
@@ -1278,7 +1281,7 @@ set_new_values(int disc_state, double offset, double recv_time)
* of the last clock filter sample, which must be earlier than
* the current time.
*/
- VERB3 bb_error_msg("disc_state=%d last update offset=%f recv_time=%f",
+ VERB4 bb_error_msg("disc_state=%d last update offset=%f recv_time=%f",
disc_state, offset, recv_time);
G.discipline_state = disc_state;
G.last_update_offset = offset;
@@ -1316,8 +1319,8 @@ update_local_clock(peer_t *p)
* an old sample or the same sample twice.
*/
if (recv_time <= G.last_update_recv_time) {
- VERB3 bb_error_msg("same or older datapoint: %f >= %f, not using it",
- G.last_update_recv_time, recv_time);
+ VERB3 bb_error_msg("update from %s: same or older datapoint, not using it",
+ p->p_dotted);
return 0; /* "leave poll interval as is" */
}
@@ -1333,7 +1336,7 @@ update_local_clock(peer_t *p)
if (G.discipline_state == STATE_FREQ) {
/* Ignore updates until the stepout threshold */
if (since_last_update < WATCH_THRESHOLD) {
- VERB3 bb_error_msg("measuring drift, datapoint ignored, %f sec remains",
+ VERB4 bb_error_msg("measuring drift, datapoint ignored, %f sec remains",
WATCH_THRESHOLD - since_last_update);
return 0; /* "leave poll interval as is" */
}
@@ -1349,10 +1352,15 @@ update_local_clock(peer_t *p)
if (abs_offset > STEP_THRESHOLD) {
double remains;
+// TODO: this "spike state" seems to be useless, peer selection already drops
+// occassional "bad" datapoints. If we are here, there were _many_ large offsets -
+// looks like _our_ clock is off.
switch (G.discipline_state) {
case STATE_SYNC:
/* The first outlyer: ignore it, switch to SPIK state */
- VERB2 bb_error_msg("offset:%+f - spike", offset);
+ VERB3 bb_error_msg("update from %s: offset:%+f, spike%s",
+ p->p_dotted, offset,
+ "");
G.discipline_state = STATE_SPIK;
return -1; /* "decrease poll interval" */
@@ -1362,8 +1370,9 @@ update_local_clock(peer_t *p)
*/
remains = WATCH_THRESHOLD - since_last_update;
if (remains > 0) {
- VERB2 bb_error_msg("spike, datapoint ignored, %f sec remains",
- remains);
+ VERB3 bb_error_msg("update from %s: offset:%+f, spike%s",
+ p->p_dotted, offset,
+ ", datapoint ignored");
return -1; /* "decrease poll interval" */
}
/* fall through: we need to step */
@@ -1390,7 +1399,7 @@ update_local_clock(peer_t *p)
* is always suppressed, even at the longer poll
* intervals.
*/
- VERB3 bb_error_msg("stepping time by %+f; poll_exp=MINPOLL", offset);
+ VERB4 bb_error_msg("stepping time by %+f; poll_exp=MINPOLL", offset);
step_time(offset);
if (option_mask32 & OPT_q) {
/* We were only asked to set time once. Done. */
@@ -1415,7 +1424,7 @@ update_local_clock(peer_t *p)
} else { /* abs_offset <= STEP_THRESHOLD */
if (G.poll_exp < MINPOLL && G.initial_poll_complete) {
- VERB3 bb_error_msg("small offset:%+f, disabling burst mode", offset);
+ VERB4 bb_error_msg("small offset:%+f, disabling burst mode", offset);
G.polladj_count = 0;
G.poll_exp = MINPOLL;
}
@@ -1444,7 +1453,7 @@ update_local_clock(peer_t *p)
#else
set_new_values(STATE_SYNC, offset, recv_time);
#endif
- VERB3 bb_error_msg("transitioning to FREQ, datapoint ignored");
+ VERB4 bb_error_msg("transitioning to FREQ, datapoint ignored");
return 0; /* "leave poll interval as is" */
#if 0 /* this is dead code for now */
@@ -1513,7 +1522,7 @@ update_local_clock(peer_t *p)
dtemp = p->filter_jitter; // SQRT(SQUARE(p->filter_jitter) + SQUARE(G.cluster_jitter));
dtemp += MAXD(p->filter_dispersion + FREQ_TOLERANCE * (G.cur_time - p->lastpkt_recv_time) + abs_offset, MINDISP);
G.rootdisp = p->lastpkt_rootdisp + dtemp;
- VERB3 bb_error_msg("updating leap/refid/reftime/rootdisp from peer %s", p->p_dotted);
+ VERB4 bb_error_msg("updating leap/refid/reftime/rootdisp from peer %s", p->p_dotted);
/* We are in STATE_SYNC now, but did not do adjtimex yet.
* (Any other state does not reach this, they all return earlier)
@@ -1533,13 +1542,13 @@ update_local_clock(peer_t *p)
dtemp = SQUARE(dtemp);
G.discipline_wander = SQRT(etemp + (dtemp - etemp) / AVG);
- VERB3 bb_error_msg("discipline freq_drift=%.9f(int:%ld corr:%e) wander=%f",
+ VERB4 bb_error_msg("discipline freq_drift=%.9f(int:%ld corr:%e) wander=%f",
G.discipline_freq_drift,
(long)(G.discipline_freq_drift * 65536e6),
freq_drift,
G.discipline_wander);
#endif
- VERB3 {
+ VERB4 {
memset(&tmx, 0, sizeof(tmx));
if (adjtimex(&tmx) < 0)
bb_perror_msg_and_die("adjtimex");
@@ -1587,7 +1596,7 @@ update_local_clock(peer_t *p)
/* NB: here kernel returns constant == G.poll_exp, not == G.poll_exp - 4.
* Not sure why. Perhaps it is normal.
*/
- VERB3 bb_error_msg("adjtimex:%d freq:%ld offset:%+ld status:0x%x",
+ VERB4 bb_error_msg("adjtimex:%d freq:%ld offset:%+ld status:0x%x",
rc, tmx.freq, tmx.offset, tmx.status);
G.kernel_freq_drift = tmx.freq / 65536;
VERB2 bb_error_msg("update from:%s offset:%+f jitter:%f clock drift:%+.3fppm tc:%d",
@@ -1609,7 +1618,7 @@ retry_interval(void)
interval = RETRY_INTERVAL;
r = random();
interval += r % (unsigned)(RETRY_INTERVAL / 4);
- VERB3 bb_error_msg("chose retry interval:%u", interval);
+ VERB4 bb_error_msg("chose retry interval:%u", interval);
return interval;
}
static unsigned
@@ -1622,7 +1631,7 @@ poll_interval(int exponent)
interval = 1 << exponent;
r = random();
interval += ((r & (interval-1)) >> 4) + ((r >> 8) & 1); /* + 1/16 of interval, max */
- VERB3 bb_error_msg("chose poll interval:%u (poll_exp:%d exp:%d)", interval, G.poll_exp, exponent);
+ VERB4 bb_error_msg("chose poll interval:%u (poll_exp:%d exp:%d)", interval, G.poll_exp, exponent);
return interval;
}
static NOINLINE void
@@ -1716,7 +1725,7 @@ recv_and_process_peer_pkt(peer_t *p)
T4 = G.cur_time;
p->lastpkt_recv_time = T4;
- VERB5 bb_error_msg("%s->lastpkt_recv_time=%f", p->p_dotted, p->lastpkt_recv_time);
+ VERB6 bb_error_msg("%s->lastpkt_recv_time=%f", p->p_dotted, p->lastpkt_recv_time);
/* The delay calculation is a special case. In cases where the
* server and client clocks are running at different rates and
@@ -1779,7 +1788,7 @@ recv_and_process_peer_pkt(peer_t *p)
* drop poll interval one step down.
*/
if (fabs(q->filter_offset) >= POLLDOWN_OFFSET) {
- VERB3 bb_error_msg("offset:%+f > POLLDOWN_OFFSET", q->filter_offset);
+ VERB4 bb_error_msg("offset:%+f > POLLDOWN_OFFSET", q->filter_offset);
goto poll_down;
}
}
@@ -1801,11 +1810,11 @@ recv_and_process_peer_pkt(peer_t *p)
G.polladj_count = 0;
if (G.poll_exp < MAXPOLL) {
G.poll_exp++;
- VERB3 bb_error_msg("polladj: discipline_jitter:%f ++poll_exp=%d",
+ VERB4 bb_error_msg("polladj: discipline_jitter:%f ++poll_exp=%d",
G.discipline_jitter, G.poll_exp);
}
} else {
- VERB3 bb_error_msg("polladj: incr:%d", G.polladj_count);
+ VERB4 bb_error_msg("polladj: incr:%d", G.polladj_count);
}
} else {
G.polladj_count -= G.poll_exp * 2;
@@ -1827,11 +1836,11 @@ recv_and_process_peer_pkt(peer_t *p)
if (pp->p_fd < 0)
pp->next_action_time -= (1 << G.poll_exp);
}
- VERB3 bb_error_msg("polladj: discipline_jitter:%f --poll_exp=%d",
+ VERB4 bb_error_msg("polladj: discipline_jitter:%f --poll_exp=%d",
G.discipline_jitter, G.poll_exp);
}
} else {
- VERB3 bb_error_msg("polladj: decr:%d", G.polladj_count);
+ VERB4 bb_error_msg("polladj: decr:%d", G.polladj_count);
}
}
}
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