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ntpd: reduce poll interval increase rate

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2010-01-01 18:12:06 +01:00
parent dd6673bac5
commit bfc2a32d88
1 changed files with 19 additions and 16 deletions
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35
networking/ntpd.c
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@ -6,7 +6,7 @@
* Licensed under GPLv2, see file LICENSE in this tarball for details.
*
* Parts of OpenNTPD clock syncronization code is replaced by
* code which is based on ntp-4.2.6. It carries the following
* code which is based on ntp-4.2.6, whuch carries the following
* copyright notice:
*
***********************************************************************
@ -39,6 +39,13 @@
#endif
/* Verbosity control (max level of -dddd options accepted).
* max 5 is very talkative (and bloated). 2 is non-bloated,
* production level setting.
*/
#define MAX_VERBOSE 2
#define RETRY_INTERVAL 5 /* on error, retry in N secs */
#define QUERYTIME_MAX 15 /* wait for reply up to N secs */
@ -62,7 +69,7 @@
/* Poll-adjust threshold.
* When we see that offset is small enough compared to discipline jitter,
* we grow a counter: += poll_ext. When it goes over POLLADJ_LIMIT,
* we grow a counter: += MINPOLL. When it goes over POLLADJ_LIMIT,
* we poll_ext++. If offset isn't small, counter -= poll_ext*2,
* and when it goes below -POLLADJ_LIMIT, we poll_ext--
*/
@ -81,19 +88,6 @@
/* Parameter averaging constant */
#define AVG 4
/* Verbosity control (max level of -dddd options accepted).
* max 5 is very talkative (and bloated). 2 is non-bloated,
* production level setting.
*/
#define MAX_VERBOSE 2
#define VERB1 if (MAX_VERBOSE && G.verbose)
#define VERB2 if (MAX_VERBOSE >= 2 && G.verbose >= 2)
#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)
enum {
NTP_VERSION = 4,
NTP_MAXSTRATUM = 15,
@ -270,6 +264,13 @@ struct globals {
static const int const_IPTOS_LOWDELAY = IPTOS_LOWDELAY;
#define VERB1 if (MAX_VERBOSE && G.verbose)
#define VERB2 if (MAX_VERBOSE >= 2 && G.verbose >= 2)
#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)
static double LOG2D(int a)
{
if (a < 0)
@ -1420,7 +1421,9 @@ recv_and_process_peer_pkt(peer_t *p)
);
}
if (rc > 0 && fabs(q->filter_offset) < POLLADJ_GATE * G.discipline_jitter) {
G.polladj_count += G.poll_exp;
/* was += G.poll_exp but it is a bit
* too optimistic for my taste at high poll_exp's */
G.polladj_count += MINPOLL;
if (G.polladj_count > POLLADJ_LIMIT) {
G.polladj_count = 0;
if (G.poll_exp < MAXPOLL) {