Date: Tue, 11 Jun 1996 10:18:21 +1000 From: Bruce Evans <bde@zeta.org.au> To: bde@zeta.org.au, nate@sri.MT.net Cc: current@freebsd.org Subject: Re: CLOCK stuff at bootup Message-ID: <199606110018.KAA02186@godzilla.zeta.org.au>
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>> Because defining one or both might work better. Using sysctl to set the >> actual (current) value might work better still. >Umm, what am I supposed to set using sysctl? I don't remember ever >seeing this kind of detail in old email. Clock nominal frequencies. >> The i8254 clock determines long term accuracy. Run for a while and >> determine the drift and/or the time daemon adjustments. >How? Compare the output of `date` with an accurate clock or look in the time deaemon log files. >> Use sysctl to >> specify the i8254 clock frequency that minimizes the drift and/or the >How? Look in the output of `sysctl -a` to find the relevant variable and set it as usual. >> The i586 clock determines intra-clock-interrupt times. Specify the i586 >> clock frequency that minimizes the jitter in getttimeofday(). >How? First find the frequency. Set it as above. Bruce
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