Date: Fri, 07 Sep 2001 14:58:10 -0500 From: Douglas Egan <degan@calcon.net> To: FreeBSD Questions <questions@FreeBSD.ORG> Subject: Re: microuptime() went backwards Message-ID: <3B9926D2.8428DA9F@calcon.net> References: <20010830060127.L19000@spotteswoode.yi.org> <20010831111324.A57354@wantadilla.lemis.com> <20010901002955.C708@spotteswoode.yi.org> <3B92EC6D.6CC4BCD0@calcon.net> <3B983405.BDE54121@calcon.net>
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Douglas Egan wrote: > Rebuilt without APM and the problem goes away. Thank you current list mail and archives. Doug Egan > Using ABit KT7A-Raid MoBo. Drives on HPT370 are ad4 and ad6. > > I can get this to happen as soon as I access my drives on the HPT370 ATA > bus. I am using 2 Western Digital 60G ATA-100 drives. I am configuring > a vinum mirror on them. As soon as I 'newfs -v /dev/vinum/mirror' the > messages start coming out. It is not just a vinum problem, as it > happened when I wasn't running vinum. Accessing the drives with vinum > is a guarantee of getting it to happen. > > I am going to remove APM from the kernel to see if it goes away. Is the > comment from a June 28, 2000 post to 'FreeBSD-stable' true? > > " > I explained this to you at Usenix, actually. It has nothing to do > with > > APM, it has to do with the selection of clocks available with/without APM > > compiled into the kernel - there is probably either a bug in the TSC > > hardware on this CPU, or (more likely) a bug in the timecounter code > > (since people see this on !APM systems already). > > s/TSC hardware/i8254 hardware/ > > (the TSC is disabled when APM is compiled in, and this forces the use of > the i8254) > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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