Date: Thu, 30 Jun 2005 00:01:51 +0200 From: Jens Schweikhardt <schweikh@schweikhardt.net> To: John Baldwin <jhb@FreeBSD.org> Cc: freebsd-current@freebsd.org Subject: Re: Timekeeping hosed by factor 3, high lapic[01] interrupt rates Message-ID: <20050629220151.GA760@schweikhardt.net> In-Reply-To: <200506291421.09040.jhb@FreeBSD.org> References: <20050516113420.GA786@schweikhardt.net> <200506281729.22302.jhb@FreeBSD.org> <20050629174243.GA762@schweikhardt.net> <200506291421.09040.jhb@FreeBSD.org>
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John et al, # Well, that's certainly weird. I got those types of numbers (~40 secs) when I # was using the broken patch. Without any patches at all, my adjustments were # -100 seconds, not +40. There probably should be at least some difference # between unpatched and patched. For the sake of my sanity, can you please # build a GENERIC kernel from scratch without any patches and capture the above # output (last cvsup about 2 weeks ago) Script started on Wed Jun 29 23:45:39 2005 # uname -a FreeBSD hal9000.schweikhardt.net 6.0-CURRENT FreeBSD 6.0-CURRENT #0: Wed Jun 29 23:32:05 CEST 2005 toor@hal9000.schweikhardt.net:/share/HEAD/obj/share/HEAD/src/sys/GENERIC i386 # /etc/rc.d/ntpd stop Stopping ntpd. # ntpdate 192.53.103.103; sleep 10; ntpdate 192.53.103.103 29 Jun 23:46:28 ntpdate[620]: adjust time server 192.53.103.103 offset -0.408871 sec 29 Jun 23:46:39 ntpdate[622]: adjust time server 192.53.103.103 offset -0.407218 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 23:47:01 ntpdate[624]: step time server 192.53.103.103 offset 1.356553 sec 29 Jun 23:48:02 ntpdate[626]: step time server 192.53.103.103 offset 50.226572 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 23:48:10 ntpdate[628]: step time server 192.53.103.103 offset 3.169196 sec 29 Jun 23:48:21 ntpdate[630]: adjust time server 192.53.103.103 offset 0.001696 sec Script done on Wed Jun 29 23:48:31 2005 # and then apply http://www.FreeBSD.org/~jhb/patches/i8254_lapic.patch # and rebuild and capture the same output again? 404. There's only a lapic_timer.patch dated 14-Jan-2005 20:29... Please don't lose your sanity :-) Regards, Jens -- Jens Schweikhardt http://www.schweikhardt.net/ SIGSIG -- signature too long (core dumped)
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