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local: reset daemon after unexpected time jump

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Add a new change type and use it when an unexpected time jump is
detected in the scheduler to reset reference times, offset and slewing,
NCR instances (with their polling interval), synchronization status, and
drop all sourcestats, manual, refclock and RTC samples.

This should make the recovery more graceful if the estimated jump has a
large error (e.g. select didn't timeout, or after system suspend).
This commit is contained in:
Miroslav Lichvar
2014-06-02 17:14:28 +02:00
parent a3e60c93da
commit a33a955163
10 changed files with 48 additions and 11 deletions
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9
sys_generic.c
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@@ -87,6 +87,7 @@ static double slew_error;
/* ================================================== */
static void handle_end_of_slew(void *anything);
static void update_slew(void);
/* ================================================== */
/* Adjust slew_start on clock step */
@@ -95,8 +96,14 @@ static void
handle_step(struct timeval *raw, struct timeval *cooked, double dfreq,
double doffset, LCL_ChangeType change_type, void *anything)
{
if (change_type == LCL_ChangeStep)
if (change_type == LCL_ChangeUnknownStep) {
/* Reset offset and slewing */
slew_start = *raw;
offset_register = 0.0;
update_slew();
} else if (change_type == LCL_ChangeStep) {
UTI_AddDoubleToTimeval(&slew_start, -doffset, &slew_start);
}
}
/* ================================================== */