mirror of
https://github.com/topjohnwu/ndk-busybox.git
synced 2024-12-11 13:35:00 +00:00
25 lines
679 B
Diff
25 lines
679 B
Diff
This patch scales down small offsets quadratically. Reduces sensitivity to jitter
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diff --git a/networking/ntpd.c b/networking/ntpd.c
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index 4695c33..ac05815 100644
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--- a/networking/ntpd.c
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+++ b/networking/ntpd.c
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@@ -1654,6 +1654,17 @@ update_local_clock(peer_t *p)
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*/
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if (G.offset_to_jitter_ratio >= TIMECONST_HACK_GATE)
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tmx.constant--;
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+
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+{
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+ double d = p->lastpkt_delay;
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+ if (d > SLEW_THRESHOLD)
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+ d = SLEW_THRESHOLD;
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+ d /= 2;
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+ if ((abs_offset / d) < 1) {
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+ offset *= (abs_offset / d);
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+ }
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+}
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+
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tmx.offset = (long)(offset * 1000000); /* usec */
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if (SLEW_THRESHOLD < STEP_THRESHOLD) {
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if (tmx.offset > (long)(SLEW_THRESHOLD * 1000000)) {
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