Date: Wed, 21 Sep 2011 11:56:51 +0300 From: Andriy Gapon <avg@FreeBSD.org> To: Alexander Motin <mav@FreeBSD.org> Cc: hackers@FreeBSD.org Subject: Re: SW_WATCHDOG vs new eventtimer code Message-ID: <4E79A6D3.2060102@FreeBSD.org> In-Reply-To: <4E79A2F9.4010802@FreeBSD.org> References: <4E78E755.8050404@FreeBSD.org> <4E78F1E7.7020502@FreeBSD.org> <4E78F762.5000906@FreeBSD.org> <4E79A2F9.4010802@FreeBSD.org>
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on 21/09/2011 11:40 Alexander Motin said the following: > It looks like your system was out for about 15 seconds or for some > reason system uptime jumped 15 seconds forward. Have you done anything > special at the moment or have you seen anything strange in system > behavior? Nope. I just looked away for a second :-) > What timecounter are you using? I see you are using HPET > eventtimer, but on what hardware (is it per-CPU or global)? The timecounter is the new TSC-low. The HPET eventtimer was global, I think. It is an ICH9-based system. > Building kernel with KTR_SPARE2 ktrace enabled should help to collect > valuable info about timers behavior before the crash. I will try to debug this further using your suggestion. Thank you! -- Andriy Gapon
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