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Add temperature compensation

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A new tempcomp directive can be used to specify a file for reading
current temperature, update interval and compensation coefficients. The
clock frequency corrections are applied in local module and are invisible
in upper layers. The measurements and corrections can be logged to
tempcomp.log file.
This commit is contained in:
Miroslav Lichvar
2010-04-12 17:07:57 +02:00
parent f12bc10917
commit c386d11765
10 changed files with 324 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

61
conf.c
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@@ -105,6 +105,7 @@ static void parse_linux_hz(const char *);
static void parse_linux_freq_scale(const char *);
static void parse_sched_priority(const char *);
static void parse_lockall(const char *);
static void parse_tempcomp(const char *);
/* ================================================== */
/* Configuration variables */
@@ -125,6 +126,7 @@ static int do_log_statistics = 0;
static int do_log_tracking = 0;
static int do_log_rtc = 0;
static int do_log_refclocks = 0;
static int do_log_tempcomp = 0;
static int do_dump_on_exit = 0;
static char *logdir = ".";
static char *dumpdir = ".";
@@ -183,6 +185,11 @@ static IPAddr bind_cmd_address4, bind_cmd_address6;
* chronyds being started. */
static char *pidfile = "/var/run/chronyd.pid";
/* Temperature sensor, update interval and compensation coefficients */
static char *tempcomp_file = NULL;
static double tempcomp_interval;
static double tempcomp_T0, tempcomp_k0, tempcomp_k1, tempcomp_k2;
/* Boolean for whether the Linux HZ value has been overridden, and the
* new value. */
static int set_linux_hz = 0;
@@ -239,6 +246,7 @@ static const Command commands[] = {
{"rtcdevice", 9, parse_rtcdevice},
{"pidfile", 7, parse_pidfile},
{"broadcast", 9, parse_broadcast},
{"tempcomp", 8, parse_tempcomp},
{"linux_hz", 8, parse_linux_hz},
{"linux_freq_scale", 16, parse_linux_freq_scale},
{"sched_priority", 14, parse_sched_priority},
@@ -679,6 +687,9 @@ parse_log(const char *line)
} else if (!strncmp(line, "refclocks", 9)) {
do_log_refclocks = 1;
line += 9;
} else if (!strncmp(line, "tempcomp", 8)) {
do_log_tempcomp = 1;
line += 8;
} else {
break;
}
@@ -1114,6 +1125,34 @@ parse_broadcast(const char *line)
/* ================================================== */
static void
parse_tempcomp(const char *line)
{
const char *tmp;
while (isspace(line[0]))
line++;
tmp = line;
while (line[0] != '\0' && !isspace(line[0]))
line++;
if (line == tmp) {
LOG(LOGS_WARN, LOGF_Configure, "Could not read tempcomp filename at line %d", line_number);
return;
}
if (sscanf(line, "%lf %lf %lf %lf %lf", &tempcomp_interval, &tempcomp_T0, &tempcomp_k0, &tempcomp_k1, &tempcomp_k2) != 5) {
LOG(LOGS_WARN, LOGF_Configure, "Could not read tempcomp interval or coefficients at line %d", line_number);
return;
}
tempcomp_file = MallocArray(char, 1 + line - tmp);
strncpy(tempcomp_file, tmp, line - tmp);
tempcomp_file[line - tmp] = '\0';
}
/* ================================================== */
static void
parse_linux_hz(const char *line)
{
@@ -1273,6 +1312,7 @@ CNF_GetLogRtc(void)
}
/* ================================================== */
int
CNF_GetLogRefclocks(void)
{
@@ -1281,6 +1321,14 @@ CNF_GetLogRefclocks(void)
/* ================================================== */
int
CNF_GetLogTempComp(void)
{
return do_log_tempcomp;
}
/* ================================================== */
char *
CNF_GetKeysFile(void)
{
@@ -1514,3 +1562,16 @@ CNF_GetLockMemory(void)
{
return lock_memory;
}
/* ================================================== */
void
CNF_GetTempComp(char **file, double *interval, double *T0, double *k0, double *k1, double *k2)
{
*file = tempcomp_file;
*interval = tempcomp_interval;
*T0 = tempcomp_T0;
*k0 = tempcomp_k0;
*k1 = tempcomp_k1;
*k2 = tempcomp_k2;
}