blob: 4afd7e134962e216aa8501e686a4bd46ef69d01a
1 | This patch scales down small offsets quadratically. Reduces sensitivity to jitter |
2 | |
3 | diff --git a/networking/ntpd.c b/networking/ntpd.c |
4 | index 4695c33..ac05815 100644 |
5 | --- a/networking/ntpd.c |
6 | +++ b/networking/ntpd.c |
7 | @@ -1654,6 +1654,17 @@ update_local_clock(peer_t *p) |
8 | */ |
9 | if (G.offset_to_jitter_ratio >= TIMECONST_HACK_GATE) |
10 | tmx.constant--; |
11 | + |
12 | +{ |
13 | + double d = p->lastpkt_delay; |
14 | + if (d > SLEW_THRESHOLD) |
15 | + d = SLEW_THRESHOLD; |
16 | + d /= 2; |
17 | + if ((abs_offset / d) < 1) { |
18 | + offset *= (abs_offset / d); |
19 | + } |
20 | +} |
21 | + |
22 | tmx.offset = (long)(offset * 1000000); /* usec */ |
23 | if (SLEW_THRESHOLD < STEP_THRESHOLD) { |
24 | if (tmx.offset > (long)(SLEW_THRESHOLD * 1000000)) { |
25 |