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ntp: change minimum allowed poll to -7

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Change the minimum poll allowed in configuration from -6 to -7. This
matches some PTP profiles using 128 sync messages per second.
This commit is contained in:
Miroslav Lichvar 2022-07-18 13:11:27 +02:00
parent 4234732b08
commit 685d8f725b
2 changed files with 3 additions and 3 deletions
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4
doc/chrony.conf.adoc
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@ -72,7 +72,7 @@ server, or its IP address. It supports the following options:
This option specifies the minimum interval between requests sent to the server This option specifies the minimum interval between requests sent to the server
as a power of 2 in seconds. For example, *minpoll 5* would mean that the as a power of 2 in seconds. For example, *minpoll 5* would mean that the
polling interval should not drop below 32 seconds. The default is 6 (64 polling interval should not drop below 32 seconds. The default is 6 (64
seconds), the minimum is -6 (1/64th of a second), and the maximum is 24 (6 seconds), the minimum is -7 (1/128th of a second), and the maximum is 24 (6
months). Note that intervals shorter than 6 (64 seconds) should generally not months). Note that intervals shorter than 6 (64 seconds) should generally not
be used with public servers on the Internet, because it might be considered be used with public servers on the Internet, because it might be considered
abuse. A sub-second interval will be enabled only when the server is reachable abuse. A sub-second interval will be enabled only when the server is reachable
@ -82,7 +82,7 @@ should be in a local network.
This option specifies the maximum interval between requests sent to the server This option specifies the maximum interval between requests sent to the server
as a power of 2 in seconds. For example, *maxpoll 9* indicates that the polling as a power of 2 in seconds. For example, *maxpoll 9* indicates that the polling
interval should stay at or below 9 (512 seconds). The default is 10 (1024 interval should stay at or below 9 (512 seconds). The default is 10 (1024
seconds), the minimum is -6 (1/64th of a second), and the maximum is 24 (6 seconds), the minimum is -7 (1/128th of a second), and the maximum is 24 (6
months). months).
*iburst*::: *iburst*:::
With this option, *chronyd* will start with a burst of 4-8 requests in order to With this option, *chronyd* will start with a burst of 4-8 requests in order to

2
ntp_core.c
View file

@ -267,7 +267,7 @@ static ARR_Instance broadcasts;
#define MAX_MAXDELAYDEVRATIO 1.0e6 #define MAX_MAXDELAYDEVRATIO 1.0e6
/* Minimum and maximum allowed poll interval */ /* Minimum and maximum allowed poll interval */
#define MIN_POLL -6 #define MIN_POLL -7
#define MAX_POLL 24 #define MAX_POLL 24
/* Enable sub-second polling intervals only when the peer delay is not /* Enable sub-second polling intervals only when the peer delay is not