[git commit] htpd: increase MIN_FREQHOLD by 3

[Denys Vlasenko]

commit: https://git.busybox.net/busybox/commit/?id=79153cb6bc5a39b00e3c43988a265804ac609837
branch: https://git.busybox.net/busybox/commit/?id=refs/heads/master

This means we'll start correcting frequency ~5 minutes after start,
not ~3.5 ones.

With previos settings I still often see largish ~0.7s initial offsets
only about 1/2 corrected before frequency correction kicks in,
resulting in ~200ppm "correction" which is then slowly undone.

Signed-off-by: Denys Vlasenko <vda.linux at googlemail.com>
---
 networking/ntpd.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/networking/ntpd.c b/networking/ntpd.c
index 7b800369e..7462113ce 100644
--- a/networking/ntpd.c
+++ b/networking/ntpd.c
@@ -149,7 +149,7 @@
  */
 
 #define INITIAL_SAMPLES    4    /* how many samples do we want for init */
-#define MIN_FREQHOLD      10    /* adjust offset, but not freq in this many first adjustments */
+#define MIN_FREQHOLD      12    /* adjust offset, but not freq in this many first adjustments */
 #define BAD_DELAY_GROWTH   4    /* drop packet if its delay grew by more than this */
 
 #define RETRY_INTERVAL    32    /* on send/recv error, retry in N secs (need to be power of 2) */
@@ -1777,9 +1777,9 @@ update_local_clock(peer_t *p)
 //15:31:53.473 update from:<IP> offset:+0.000007 delay:0.158142 jitter:0.010922 clock drift:+9.343ppm tc:6
 //15:32:58.902 update from:<IP> offset:-0.000728 delay:0.158222 jitter:0.009454 clock drift:+9.298ppm tc:6
 			/*
-			 * This expression would choose MIN_FREQHOLD + 7 in the above example.
+			 * This expression would choose MIN_FREQHOLD + 8 in the above example.
 			 */
-			G.FREQHOLD_cnt = MIN_FREQHOLD + ((unsigned)(abs(tmx.offset)) >> 16);
+			G.FREQHOLD_cnt = 1 + MIN_FREQHOLD + ((unsigned)(abs(tmx.offset)) >> 16);
 		}
 		G.FREQHOLD_cnt--;
 		tmx.status |= STA_FREQHOLD;