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Don't reset kernel frequency on start without drift file

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This commit is contained in:
Miroslav Lichvar
2011-06-14 21:03:16 +02:00
parent a5f63180fc
commit 2b7e4d645f
4 changed files with 26 additions and 15 deletions
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28
sys_linux.c
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@@ -720,15 +720,17 @@ read_frequency(void)
double tick_term;
double unscaled_freq;
double freq_term;
long tick;
if (TMX_GetFrequency(&unscaled_freq) < 0) {
if (TMX_GetFrequency(&unscaled_freq, &tick) < 0) {
LOG_FATAL(LOGF_SysLinux, "adjtimex() failed");
}
/* Use current_tick here rather than txc.tick, otherwise we're
thrown off course when doing a fast slew (in which case, txc.tick
is nowhere near the nominal value) */
tick_term = dhz * (double)(nominal_tick - current_tick);
if (fast_slewing) {
tick -= slewing_tick - current_tick;
}
tick_term = dhz * (double)(nominal_tick - tick);
freq_term = unscaled_freq / freq_scale;
#if 0
@@ -1043,19 +1045,13 @@ void
SYS_Linux_Initialise(void)
{
long offset;
double freq;
offset_register = 0.0;
fast_slewing = 0;
get_version_specific_details();
current_tick = nominal_tick;
current_total_tick = 1.0 / dhz;
lcl_RegisterSystemDrivers(read_frequency, set_frequency,
accrue_offset, apply_step_offset,
get_offset_correction, set_leap);
offset = 0;
if (TMX_ApplyOffset(&offset) < 0) {
LOG_FATAL(LOGF_SysLinux, "adjtimex() failed");
@@ -1072,6 +1068,14 @@ SYS_Linux_Initialise(void)
}
TMX_SetSync(CNF_GetRTCSync());
/* Read current kernel frequency */
TMX_GetFrequency(&freq, &current_tick);
current_total_tick = (current_tick + freq / freq_scale / dhz) / 1.0e6;
lcl_RegisterSystemDrivers(read_frequency, set_frequency,
accrue_offset, apply_step_offset,
get_offset_correction, set_leap);
}
/* ================================================== */