Date: Sat, 18 May 1996 02:40:13 +1000 From: Bruce Evans <bde@zeta.org.au> To: freebsd-current@freebsd.org, syssgm@devetir.qld.gov.au Subject: Re: Wildly inaccurate clock calibration. Message-ID: <199605171640.CAA29856@godzilla.zeta.org.au>
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>I don't know how much you care about my ancient hardware, but I got this >from the new clock calibration code when run on my 16Mhz 386sx: >May 15 13:02:44 stupid /kernel: FreeBSD 2.2-CURRENT #45: Wed May 15 01:06:31 EST 1996 >May 15 13:02:44 stupid /kernel: syssgm@stupid.devetir.qld.gov.au:/usr/src/sys/compile/STUPID >May 15 13:02:44 stupid /kernel: Calibrating clock(s) relative to mc146818A clock ... i8254 clock: 63817 Hz >May 15 13:02:45 stupid /kernel: 63817 Hz differs from default of 1193182 Hz by more than 1% >May 15 13:02:45 stupid /kernel: CPU: i386DX (386-class CPU) >and on a subsequent reboot: >May 16 17:01:33 stupid /kernel: 63814 Hz differs from default of 1193182 Hz by more than 1% You are experienced enough to debug it :-). Start by defining option CLK_CALIBRATION_LOOP and booting with -v. Each calibration should take about 1 second if the mc14* clock is working. Bruce
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