[ntp:questions] Re: Monitoring the leap second tonight

Hans Jørgen Jakobsen hjj at wheel.dk
Sun Jan 1 00:16:56 UTC 2006


On 31 Dec 2005 21:37:40 GMT, Hans Jørgen Jakobsen wrote:
> On 31 Dec 2005 21:02:44 GMT, Markus Kuhn wrote:
>> If you have nothing better to do around midnight UTC tonight, then
>> install
>>
>>   http://www.cl.cam.ac.uk/~mgk25/time/leap/timelog.c
>>
>> and run it with
>>
>>   ./timelog -w2005-12-31T23:59:00 -d180 >/tmp/leapsecond.log
>>
>> to record the last minute of this year and the first to of the next on
>> any potentially interesting NTP machine that you can get hold of.
>>
>> This records the BSD API, the POSIX API, and on Pentium CPUs also the
>> Pentium timestamp counter. Command-line options allow you specify start
>> time and duration of the recording.
>>
>> This is meant to be portable POSIX code, but has only been tested under
>> Linux so far.
>>
> Some output on FreeBSD 5.2.1:
> hjj at old:~/leap> cc -c timelog.c
> hjj at old:~/leap> cc timelog.o -o timelog
> hjj at old:~/leap> ./timelog -w2005-12-31T21:14:00 -d180
> #             gettimeofday         gettimeofday        TSC
> 0         2005-12-31T21:19:53Z 1136063993.028117 000438e310cad428
> 1         2005-12-31T21:19:53Z 1136063993.344206 000438e31491a11c
> 2         2005-12-31T21:19:53Z 1136063993.657504 000438e3184fe68a
> 3         2005-12-31T21:19:53Z 1136063993.970516 000438e31c0d4c39
> ....
> 574       2005-12-31T21:24:00Z 1136064240.497074 000438ee9d853b12
> 575       2005-12-31T21:24:00Z 1136064240.810569 000438eea1441b48
> 576       2005-12-31T21:24:01Z 1136064241.124419 000438eea50410a7
> hjj at old:~/leap> uname -a
> FreeBSD old.xxxx.dk 5.2.1-RELEASE FreeBSD 5.2.1-RELEASE #0: Fri Jun 18 22:37:02 CEST 2004     hjj at old.tele.dk:/usr/src/sys/i386/compile/OLD  i386
> hjj at old:~/leap>
>
Machine 1 FreeBSD 5.2.1  200MHz:
182       2005-12-31T23:59:57Z 1136073597.420321 00043aa350de46ec
183       2005-12-31T23:59:57Z 1136073597.731842 00043aa354971dbf
184       2005-12-31T23:59:58Z 1136073598.043459 00043aa358503f3a
185       2005-12-31T23:59:58Z 1136073598.354796 00043aa35c08846d
186       2005-12-31T23:59:58Z 1136073598.666899 00043aa35fc32214
187       2005-12-31T23:59:58Z 1136073598.978153 00043aa3637b2722
188       2005-12-31T23:59:59Z 1136073599.289804 00043aa367346276
189       2005-12-31T23:59:59Z 1136073599.601743 00043aa36aee7fc8
190       2005-12-31T23:59:59Z 1136073599.912980 00043aa36ea6776b
191       2005-12-31T23:59:59Z 1136073599.224605 00043aa3725f9e2e
192       2005-12-31T23:59:59Z 1136073599.536449 00043aa3761970e0
193       2005-12-31T23:59:59Z 1136073599.847850 00043aa379d1e96e
194       2006-01-01T00:00:00Z 1136073600.160102 00043aa37d8cfc73
195       2006-01-01T00:00:00Z 1136073600.471680 00043aa38145fdfd
196       2006-01-01T00:00:01Z 1136073601.082626 00043aa38892aa81
197       2006-01-01T00:00:01Z 1136073601.395280 00043aa38c4ef6bd

FreeBSD 5.4:
CPU: Intel(R) Xeon(TM) CPU 3.06GHz (3052.95-MHz 686-class CPU):
3476      2005-12-31T23:59:58Z 1136073598.922226 00d0bca4121f786a
3477      2005-12-31T23:59:58Z 1136073598.938604 00d0bca4151a188a
3478      2005-12-31T23:59:58Z 1136073598.955860 00d0bca4183da9a6
3479      2005-12-31T23:59:58Z 1136073598.976134 00d0bca41bedb716
3480      2005-12-31T23:59:58Z 1136073598.990737 00d0bca41e95cdde
3481      2005-12-31T23:59:59Z 1136073599.006386 00d0bca4216e7aea
3482      2005-12-31T23:59:59Z 1136073599.021528 00d0bca4242f94ca
....
3536      2005-12-31T23:59:59Z 1136073599.920014 00d0bca4c79f9b8a
3537      2005-12-31T23:59:59Z 1136073599.938273 00d0bca4caf1e94a
3538      2005-12-31T23:59:59Z 1136073599.955145 00d0bca4ce032c52
3539      2005-12-31T23:59:59Z 1136073599.971307 00d0bca4d0f43c82
3540      2005-12-31T23:59:59Z 1136073599.987840 00d0bca4d3f622f2
3541      2006-01-01T00:00:00Z 1136073600.003608 00d0bca4d6d47402
3542      2005-12-31T23:59:59Z 1136073599.019442 00d0bca4d9b5c756
3543      2005-12-31T23:59:59Z 1136073599.034824 00d0bca4dc82166e
3544      2005-12-31T23:59:59Z 1136073599.049513 00d0bca4df2e1626
....
3587      2005-12-31T23:59:59Z 1136073599.845912 00d0bca5700c7d6e
3588      2005-12-31T23:59:59Z 1136073599.861382 00d0bca572dce48e
3589      2005-12-31T23:59:59Z 1136073599.882819 00d0bca576c3258a
3590      2005-12-31T23:59:59Z 1136073599.899977 00d0bca579e2229e
3591      2005-12-31T23:59:59Z 1136073599.923741 00d0bca57e34c53e
3592      2005-12-31T23:59:59Z 1136073599.943775 00d0bca581d9aaa2
3593      2005-12-31T23:59:59Z 1136073599.966108 00d0bca585e9ab8e
3594      2005-12-31T23:59:59Z 1136073599.983840 00d0bca58923419a
3595      2006-01-01T00:00:00Z 1136073600.001210 00d0bca58c4c401e
3596      2006-01-01T00:00:00Z 1136073600.018617 00d0bca58f76e35e
3597      2006-01-01T00:00:00Z 1136073600.035573 00d0bca5928c8676
3598      2006-01-01T00:00:00Z 1136073600.050934 00d0bca59557cc52
3599      2006-01-01T00:00:00Z 1136073600.067111 00d0bca598491af6
3600      2006-01-01T00:00:00Z 1136073600.081464 00d0bca59ae58236
3601      2006-01-01T00:00:00Z 1136073600.102734 00d0bca59ec403be

/hjj




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