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54 commits

Author SHA1 Message Date
Miroslav Lichvar
6ca73bf670 Cleanup including of system headers 2013-06-14 13:41:16 +02:00
Miroslav Lichvar
359d444343 Remove unncessary return statements 2013-05-21 15:08:34 +02:00
Miroslav Lichvar
0c738d84af Update copyright years 2012-02-28 13:11:56 +01:00
Miroslav Lichvar
d4ce3f19c3 Reschedule fast slew timeout on offset change 2012-02-24 16:26:53 +01:00
Miroslav Lichvar
1b8deaf354 Control offset correction rate in Linux driver 
The kernel currently doesn't support a linear adjustment with
programmable rate, extend the use of the kernel PLL with locked
frequency instead.

Set the PLL time constant according to the correction time corresponding
to the correction rate and corrected offset.

On kernels with nano PLL adjtime() is no longer used.
 2011-11-15 12:30:59 +01:00
Miroslav Lichvar
c7d0232bb1 Introduce offset correction rate 
We want to correct the offset quickly, but we also want to keep the
frequency error caused by the correction itself low.

Define correction rate as the area of the region bounded by the graph of
offset corrected in time. Set the rate so that the time needed to correct
an offset equal to the current sourcestats stddev will be equal to the
update interval (assuming linear adjustment). The offset and the
time needed to make the correction are inversely proportional.

This is only a suggestion and it's up to the system driver how the
adjustment will be executed.
 2011-11-15 12:27:44 +01:00
Miroslav Lichvar
78fc17c661 Use ADJ_OFFSET_SS_READ mode only with kernels 2.6.28 and later 2011-09-13 16:39:08 +02:00
Miroslav Lichvar
d42addf746 Add macro for maximum fastslew timeout 2011-09-01 18:08:45 +02:00
Miroslav Lichvar
6ab3d1daa3 Add support for ADJ_SETOFFSET mode 
This adjtimex mode allows precise stepping of the system clock.
 2011-09-01 15:31:11 +02:00
Miroslav Lichvar
c6e9065498 Fix current_total_tick calculation 2011-06-15 15:35:15 +02:00
Miroslav Lichvar
2b7e4d645f Don't reset kernel frequency on start without drift file 2011-06-15 15:35:00 +02:00
Miroslav Lichvar
6a2a837ede Remove kernel version check from rtc code 
It should work with all currently supported kernels (>= 2.2.0).
 2011-06-06 21:33:59 +02:00
Miroslav Lichvar
eca08a281c Determine hz and shift from sysconf(_SC_CLK_TCK) when available 2011-06-06 17:41:14 +02:00
Miroslav Lichvar
9fd8f76fa0 Log final version specific details 2011-06-06 17:12:31 +02:00
Miroslav Lichvar
50de930730 Drop support for old readonly adjtime 2011-06-06 17:12:31 +02:00
Miroslav Lichvar
da1097095c Drop support for pre 2.2 Linux kernels 2011-06-06 17:12:31 +02:00
Miroslav Lichvar
ec7d302a6c Support Linux 3.0 and later 2011-06-06 13:56:27 +02:00
Miroslav Lichvar
da2c8d9076 Use config.h 2011-05-24 18:07:06 +02:00
Miroslav Lichvar
2a0c35646c Allow changing tick up to max_tick_bias 2011-04-12 16:40:22 +02:00
Miroslav Lichvar
680612cf09 Reduce Linux driver verbosity 2011-02-15 17:22:40 +01:00
Miroslav Lichvar
e8c5d15690 Remove CVS headers 2011-01-28 12:56:09 +01:00
Miroslav Lichvar
e63cba05b2 Update copyright 2011-01-27 13:05:26 +01:00
Miroslav Lichvar
2f2e524bc6 Don't use timezone parameter in gettimeofday and settimeofday calls 2010-08-12 14:43:26 +02:00
Miroslav Lichvar
6b0198c2d7 Replace all CROAK calls with assert or LOG_FATAL 
Remove croak() and use assert() or LOG_FATAL() everywhere. Hopefully
the problems with debugging mentioned in the croak() comment are long gone.
 2010-08-12 14:30:05 +02:00
Miroslav Lichvar
1faeb45063 Update offset correction errors only when needed 2010-08-11 17:16:16 +02:00
Miroslav Lichvar
fa84496423 Fix updating of nano slew offset correction error 2010-08-11 16:57:19 +02:00
Miroslav Lichvar
cb28aeeacc Add nanosecond slewing to Linux driver 
For offset adjustments below 10 microseconds use kernel PLL with
locked frequency and 1s time constant.
 2010-08-06 11:50:35 +02:00
Miroslav Lichvar
7994b31de4 Reset adjtime offset on start 2010-08-05 13:27:52 +02:00
Miroslav Lichvar
f6320e7050 Don't hang in our_round 
The routine could loop infinitely when rounding a large value, replace
it with our_lround.
 2010-06-07 14:19:58 +02:00
Miroslav Lichvar
a080d00352 Add rtcsync directive 
The directive enables the 11 minute kernel mode. It cannot be used
when the normal RTC tracking is enabled.
 2010-05-14 14:41:11 +02:00
Miroslav Lichvar
be4369936b Clamp tick value before calling adjtimex 
If tick is outside allowed adjtimex range, clamp it and log a warning
instead of aborting.
 2010-04-27 14:35:27 +02:00
Miroslav Lichvar
1a7415a6ab Return actual frequency in drv_set_freq functions 
This is needed to keep sourcestats accurate when the actual frequency is
different from the requested frequency due to clamping (or possibly
rounding in future system drivers).
 2010-04-27 14:35:27 +02:00
Miroslav Lichvar
c15db71f9e Add dispersion after Linux makestep 2010-04-27 14:35:27 +02:00
Miroslav Lichvar
fd375ca55b Estimate offset correction error in Linux driver 2010-02-18 14:17:16 +01:00
Miroslav Lichvar
20d898d182 Prepare for handling offset correction error 2010-02-16 17:46:42 +01:00
Miroslav Lichvar
15e154c09d Handle immediate step in local module instead of system driver 
This fixes the problem where scheduler wasn't notified about performed
steps and it also makes the command available on all supported systems.
 2010-01-25 15:51:15 +01:00
Miroslav Lichvar
52d0c9a057 Limit timeout for end of slew to avoid overflow 2010-01-25 15:50:45 +01:00
Miroslav Lichvar
e3234465e2 Clean up system options code 
Abort with error message when trying to use unsupported/disabled
system specific option.
 2009-11-25 14:37:41 +01:00
Miroslav Lichvar
62fe343990 Reduce adjtime calling 
Don't call adjtime to determine remaining offset when there is no slewing
running.
 2009-11-23 17:23:43 +01:00
Miroslav Lichvar
8e23110aec Update COPYING and FSF address 2009-10-28 17:53:33 +01:00
Miroslav Lichvar
f7e08d0c30 Update copyrights 2009-10-28 17:53:10 +01:00
Miroslav Lichvar
d06f02be1c Don't forget to free capability object 2009-09-21 12:47:17 +02:00
Miroslav Lichvar
dd4fb511a5 Don't lose remaining adjtime in initiate_slew 
initiate_slew is called also from set_frequency which doesn't read
the remaining adjtime. This wasn't a problem before commit 8c0f3f4
as offset_register was 0.0 and initiate_slew immediately returned.
 2009-08-26 17:58:57 +02:00
Miroslav Lichvar
8c0f3f4042 Try to minimize adjtime error 
The offset is rounded before calling adjtime and the error below
microsecond is accumulated.
 2009-07-01 15:56:00 +02:00
Miroslav Lichvar
032d1db883 Add support for ADJ_OFFSET_SS_READ mode 
Also assume that kernels >= 2.6.27 don't need frequency scaling.
 2009-05-20 17:43:09 +02:00
John Hasler
35e662d810 Add mlockall and SCHED_FIFO support 
The attached patch adds support for mlockall() as well as the SCHED_FIFO
real-time scheduler. It should result in reduced (and more consistent)
latency. Usage is documented in all the documents.
 2009-02-10 18:02:28 +01:00
Miroslav Lichvar
8f9c237010 Leap second support 
Leap second status is accepted and forwarded to clients if majority
of selectable sources agree. The actual insertion/deletion is supported
only on Linux now.
 2009-01-08 13:33:15 +01:00
Miroslav Lichvar
be42b4eeea Linux capabilities support 
Attached is a patch adding a linux capabilities support to chronyd. It
adds -u option which can be used to specify the user which chronyd
should switch to.
 2008-11-05 23:50:48 +00:00
Richard P. Curnow
1a4fa3330a Rename round() function to avoid clash with builtin 2006-04-15 00:34:04 +01:00
richard
22a309efe3 Output to syslog more debugging information at startup 2006-01-19 21:37:13 +00:00