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timedated: adjust accuracy and slew values

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This commit is contained in:
Kay Sievers 2014-03-31 04:00:04 +02:00
parent 2ad7561f9f
commit 42742bf1ce
1 changed files with 12 additions and 12 deletions
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24
src/timedate/timedate-sntp.c
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@ -59,24 +59,24 @@
#define ADJ_SETOFFSET 0x0100 /* add 'time' to current time */
#endif
/* Maximum delta in seconds which the system clock is gradually adjusted
* to approach the network time. Deltas larger that this are set by letting
* the system time jump. The maximum for adjtime is 500ms.
*/
#define NTP_MAX_ADJUST 0.2
/* expected accuracy of time synchronization; used to adjust the poll interval */
#define NTP_ACCURACY_SEC 0.2
/*
* "Define the required accuracy of the system clock, then calculate the
* maximum timeout. Use the longest maximum timeout possible given the system
* constraints to minimize time server aggregate load."
*
* "A client MUST NOT under any conditions use a poll interval less
* than 15 seconds."
*/
#define NTP_POLL_INTERVAL_MIN_SEC 16
#define NTP_POLL_INTERVAL_MIN_SEC 32
#define NTP_POLL_INTERVAL_MAX_SEC 2048
#define NTP_ACCURACY_SEC 0.1
/*
* Maximum delta in seconds which the system clock is gradually adjusted
* (slew) to approach the network time. Deltas larger that this are set by
* letting the system time jump. The kernel's limit for adjtime is 0.5s.
*/
#define NTP_MAX_ADJUST 0.4
/* NTP protocol, packet header */
#define NTP_LEAP_PLUSSEC 1
#define NTP_LEAP_MINUSSEC 2
#define NTP_LEAP_NOTINSYNC 3
@ -666,7 +666,7 @@ int sntp_server_connect(SNTPContext *sntp, const char *server) {
sntp->server_addr.sin_family = AF_INET;
sntp->server_addr.sin_addr.s_addr = inet_addr(server);
sntp->poll_interval_usec = 2 * NTP_POLL_INTERVAL_MIN_SEC * USEC_PER_SEC;
sntp->poll_interval_usec = NTP_POLL_INTERVAL_MIN_SEC * USEC_PER_SEC;
return sntp_send_request(sntp);
}