"Thomas T. Veldhouse" wrote:
>
> Sounds like hardware to me. You probably want to run a time program via
> cron to periodically update the clock rate.
Well, that may be, but it was pretty well-behaved hardware until I used
plip--no clock drift whatsoever. I have the daemon running at boot to
update off of an external time source, but it seems pretty clear to me
that the timer tick interrupt is getting clobbered--else why the drift
only when plip is running a transfer?
jmc
> Tom Veldhouse
> [EMAIL PROTECTED]
>
> ----- Original Message -----
> From: "John Merryweather Cooper" <[EMAIL PROTECTED]>
> To: "FreeBSD-STABLE Mailing List" <[EMAIL PROTECTED]>
> Sent: Monday, April 30, 2001 10:29 AM
> Subject: problem with plip stealing clock
>
> > While using my main workstation as a local FTP for my laptop over plip,
> > I noticed that FreeBSD was losing track of time at a prodigious rate.
> > Over about five hours of downloading to my laptop, my main workstation
> > lost close to 3.5 hours of time off its clock. During pulses of IO, the
> > mouse also becomes very sluggish under X. I'd expect some slowdown
> > because FreeBSD doesn't appear to use the DMA channel, but I never
> > expected to see the affect on the clock--e.g., this message will say
> > about 8:30 when the real time here is more like 12:00. Sounds like a
> > bug to me . . .
> >
> > Any thoughts on how to work around/solve this?
> >
> > jmc
> >
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