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conf: add option to set maximum slew rate

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With the generic driver, the maxslewrate directive sets the maximum
frequency offset that the driver is allowed to use to slew the time. By
default, it's set to 83333.333 (1/12). This is identical to what Linux
fast slewing used to use.
This commit is contained in:
Miroslav Lichvar
2014-05-21 16:23:30 +02:00
parent 3e1dc801b0
commit 9cf78b974a
4 changed files with 44 additions and 9 deletions
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11
conf.c
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@@ -88,6 +88,7 @@ static unsigned long command_key_id;
static double max_update_skew = 1000.0;
static double correction_time_ratio = 3.0;
static double max_clock_error = 1.0; /* in ppm */
static double max_slew_rate = 1e6 / 12.0; /* in ppm */
static double reselect_distance = 1e-4;
static double stratum_weight = 1.0;
@@ -422,6 +423,8 @@ CNF_ParseLine(const char *filename, int number, char *line)
parse_double(p, &max_clock_error);
} else if (!strcasecmp(command, "maxsamples")) {
parse_int(p, &max_samples);
} else if (!strcasecmp(command, "maxslewrate")) {
parse_double(p, &max_slew_rate);
} else if (!strcasecmp(command, "maxupdateskew")) {
parse_double(p, &max_update_skew);
} else if (!strcasecmp(command, "minsamples")) {
@@ -1390,6 +1393,14 @@ CNF_GetCorrectionTimeRatio(void)
/* ================================================== */
double
CNF_GetMaxSlewRate(void)
{
return max_slew_rate;
}
/* ================================================== */
double
CNF_GetReselectDistance(void)
{