Date: Mon, 11 Jun 2007 14:51:14 +0400 (MSD) From: Dmitry Morozovsky <marck@rinet.ru> To: Matthew Dillon <dillon@apollo.backplane.com> Cc: freebsd-stable@freebsd.org, Ivan Voras <ivoras@fer.hr> Subject: Re: calcru: runtime went backwards, RELENG_6, SMP Message-ID: <20070610193708.W88437@woozle.rinet.ru> In-Reply-To: <20070610175748.L88437@woozle.rinet.ru> References: <20070606153542.Y76617@woozle.rinet.ru> <f46tmc$rgb$2@sea.gmane.org> <20070606231940.T91939@woozle.rinet.ru> <200706062127.l56LRYTe090137@apollo.backplane.com> <20070608111809.U97287@woozle.rinet.ru> <200706090809.l5989Mkj020033@apollo.backplane.com> <20070609163329.P4850@woozle.rinet.ru> <200706091957.l59JvDWR026822@apollo.backplane.com> <20070610175748.L88437@woozle.rinet.ru>
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DM> MD> :Well, I can of course shut the kernel up, but kernel time stability is still my
DM> MD> :concern. I run ntpd there and while sometimes it seems stable (well, sorta:
DM> MD> :drift are within several seconds...) there are cases of half-a-minute time
DM> MD> :steps.
DM> MD>
DM> MD> I think the only hope you have of getting the issue addressed is to
DM> MD> run FreeBSD current. If you can reproduce the time slips under current
DM> MD> the developers should be able to track the problem down and fix it. The
DM> MD> code is so different between those two releases that they are going to
DM> MD> have a hard time working the problem in FreeBSD-6.
DM>
DM> Well, quick compile'n'install HEAD into the swap does not reveal time slips for
DM> now. However, this is with WITNESS, I'll try to turn off most debugging kernel
DM> options and try again.
Not perfect:
`time make install clean' finished with
===> Cleaning for screen-4.0.3
21.671u 3.775s 0:28.95 87.8% -1542500797858546+3035018384651625k 3393131677337410024+8717906021891401862io 1045071671142449598pf+0w
Also, in /var/log/messages
Jun 11 06:56:52 ct-new ntpd[613]: time reset -320.107962 s
Jun 11 07:15:00 ct-new ntpd[613]: time reset -1.401627 s
ct-new# ntpq -c pe
remote refid st t when poll reach delay offset jitter
==============================================================================
cs3661.rinet.ru 192.38.7.240 2 u 354 1024 377 5.305 -66314. 4321.47
ns.rinet.ru 130.207.244.240 2 u 365 1024 377 6.913 -66316. 4305.33
whale.rinet.ru 195.2.64.5 2 u 358 1024 377 7.939 -66308. 4304.90
Any directions to debug this?
Sincerely,
D.Marck [DM5020, MCK-RIPE, DM3-RIPN]
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*** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck@rinet.ru ***
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