faraphel/chrony
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

refclock: set default precision to precision of system clock

Browse source
This commit is contained in:
Miroslav Lichvar 2017-06-16 13:39:01 +02:00
parent 018a1c42b0
commit 0dbfe020ad
2 changed files with 4 additions and 9 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
doc/chrony.conf.adoc
View file

@ -505,9 +505,8 @@ algorithm. Increasing the delay is useful to avoid having no majority in the
source selection or to make it prefer other sources. The default is 1e-9 (1
nanosecond).
*precision* _precision_:::
This option sets the refclock precision (in seconds). The default is 1e-6 (1
microsecond) for SHM refclock, and 1e-9 (1 nanosecond) for SOCK, PPS and PHC
refclocks.
This option sets the precision of the reference clock (in seconds). The default
value is the estimated precision of the system clock.
*maxdispersion* _dispersion_:::
Maximum allowed dispersion for filtered samples (in seconds). Samples with
larger estimated dispersion are ignored. By default, this limit is disabled.

8
refclock.c
View file

@ -173,16 +173,12 @@ RCL_AddRefclock(RefclockParameters *params)
if (strcmp(params->driver_name, "SHM") == 0) {
inst->driver = &RCL_SHM_driver;
inst->precision = 1e-6;
} else if (strcmp(params->driver_name, "SOCK") == 0) {
inst->driver = &RCL_SOCK_driver;
inst->precision = 1e-9;
} else if (strcmp(params->driver_name, "PPS") == 0) {
inst->driver = &RCL_PPS_driver;
inst->precision = 1e-9;
} else if (strcmp(params->driver_name, "PHC") == 0) {
inst->driver = &RCL_PHC_driver;
inst->precision = 1e-9;
} else {
LOG_FATAL("unknown refclock driver %s", params->driver_name);
return 0;
@ -207,8 +203,8 @@ RCL_AddRefclock(RefclockParameters *params)
inst->lock_ref = params->lock_ref_id;
inst->offset = params->offset;
inst->delay = params->delay;
if (params->precision > 0.0)
inst->precision = params->precision;
inst->precision = LCL_GetSysPrecisionAsQuantum();
inst->precision = MAX(inst->precision, params->precision);
inst->pulse_width = params->pulse_width;
inst->timeout_id = -1;
inst->source = NULL;