Date: Thu, 12 Feb 2015 14:36:52 -0800 From: Rick Thomas <rbthomas@pobox.com> To: FreeBSD PowerPC ML <freebsd-ppc@freebsd.org> Cc: danfe@nsu.ru Subject: Re: System clock falls behind quickly on Mac mini G4 Message-ID: <9BE10E2F-D281-4E4F-9575-1A41F61AA068@pobox.com>
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Hi! Did you ever get a solution for this? I’m having the same problem on a PowerMac G4 “quicksilver” machine. Thanks! Rick > On Tue, Apr 08, 2014 at 10:41:44AM -0400, John Baldwin wrote: > > It wouldn’t be tsc_freq on a powerpc box. You'd need to see what your > > time counter is and what frequency it is using (kern.timecounter nodes) > > and see if that is adjustable. > > Yup, sorry; I forgot that our TSC maps to actual x86 Time Stamp Counter, > not being some aggregated MI relatively high-precision time keeping thing. > > Does not look I can do much about it though: > > $ sysctl kern.timecounter > kern.timecounter.fast_gettime: 1 > kern.timecounter.tick: 2 > kern.timecounter.choice: timebase(0) dummy(-1000000) > kern.timecounter.hardware: timebase > kern.timecounter.alloweddeviation: 5 > kern.timecounter.stepwarnings: 0 > kern.timecounter.tc.timebase.mask: 4294967295 > kern.timecounter.tc.timebase.counter: 3224483187 > kern.timecounter.tc.timebase.frequency: 41620907 > kern.timecounter.tc.timebase.quality: 0 > > ./danfehome | help
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