Timekeeping hosed by factor 3, high lapic[01] interrupt rates
Jens Schweikhardt
schweikh at schweikhardt.net
Wed Jun 29 17:43:11 GMT 2005
John et al,
# Can you get the same ntpdate output for the kernel without the patch?
Sure; boot with kern.smp.disabled=1.
Script started on Wed Jun 29 19:33:39 2005
# /etc/rc.d/ntpd stop
Stopping ntpd.
# ntpdate 192.53.103.103; sleep 10; ntpdate 192.53.103.103
29 Jun 19:34:10 ntpdate[602]: adjust time server 192.53.103.103 offset -0.393914 sec
29 Jun 19:34:21 ntpdate[604]: adjust time server 192.53.103.103 offset -0.391510 sec
# sysctl kern.timecounter.hardware=i8254
kern.timecounter.hardware: TSC -> i8254
# ntpdate 192.53.103.103; sleep 10; ntpdate 192.53.103.103
29 Jun 19:35:09 ntpdate[616]: step time server 192.53.103.103 offset 7.003573 sec
29 Jun 19:36:02 ntpdate[618]: step time server 192.53.103.103 offset 42.615163 sec
# sysctl kern.timecounter.hardware=TSC
kern.timecounter.hardware: i8254 -> TSC
# ntpdate 192.53.103.103; sleep 10; ntpdate 192.53.103.103
29 Jun 19:36:21 ntpdate[620]: step time server 192.53.103.103 offset 9.605683 sec
29 Jun 19:36:31 ntpdate[622]: adjust time server 192.53.103.103 offset 0.002316 sec
Script done on Wed Jun 29 19:36:53 2005
Regards,
Jens
--
Jens Schweikhardt http://www.schweikhardt.net/
SIGSIG -- signature too long (core dumped)
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