Date: Thu, 23 Jun 2005 17:14:39 -0400 From: John Baldwin <jhb@FreeBSD.org> To: Jens Schweikhardt <schweikh@schweikhardt.net> Cc: freebsd-current@FreeBSD.org Subject: Re: Timekeeping hosed by factor 3, high lapic[01] interrupt rates Message-ID: <200506231714.40891.jhb@FreeBSD.org> In-Reply-To: <20050623205854.GA763@schweikhardt.net> References: <20050516113420.GA786@schweikhardt.net> <200506221057.48595.jhb@FreeBSD.org> <20050623205854.GA763@schweikhardt.net>
next in thread | previous in thread | raw e-mail | index | archive | help
On Thursday 23 June 2005 04:58 pm, Jens Schweikhardt wrote: > John et al, > > On Wed, Jun 22, 2005 at 10:57:47AM -0400, John Baldwin wrote: > # On Tuesday 21 June 2005 03:51 pm, Jens Schweikhardt wrote: > # > John, > # > > # > # > See > # > http://lists.freebsd.org/pipermail/freebsd-current/2005-May/050210.html > # > # > for the whole thread. > # > # > # > # I did glance over it, but I don't really have time to read every > e-mail # > on # current@ in detail. :( Do you have verbose dmesg's for > both cases? # > If so, # can you get the 'lapic: Divisor' lines from each > boot? # > > # > Sure, they are the same: > # > lapic: Divisor 2, Frequency 99829738 hz > # > > # > It appears Chris Gilbert has the same problem, see "Timekeeping gone > # > whack in 6-CURRENT" on this list. > # > # Ok, this is weird. Does this happen if you disable SMP via > # 'kern.smp.disabled=1' from the loader? > > No, with "set kern.smp.disabled=1" at the loader prompt, > timekeeping is ok and vmstat -i displays > > interrupt total rate > irq1: atkbd0 684 3 > irq13: npx0 1 0 > irq14: ata0 63 0 > irq15: ata1 109 0 > irq18: em0 27 0 > irq24: ahd0 23192 106 > irq25: ahc0 16 0 > lapic0: timer 430979 1986 > Total 455071 2097 > > Regards, > > Jens Ok. What timecounter does your UP kernel use, and does your UP kernel break if you change the timecounter to i8254? -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve" = http://www.FreeBSD.org
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200506231714.40891.jhb>