From owner-freebsd-alpha  Fri Dec 28 23:28:46 2001
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Date: Fri, 28 Dec 2001 23:28:28 -0800 (PST)
From: John Baldwin <jhb@FreeBSD.org>
To: "Murphy, Patrick" <murphyp1@ais.msu.edu>
Subject: RE: Clock Skew on 5.0-CURRENT SMP Alpha 2100A/250 3 engine machi
Cc: "freebsd-alpha@freebsd.org" <freebsd-alpha@freebsd.org>
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On 28-Dec-01 Murphy, Patrick wrote:
> Does anyone know a way to fix the clock skew on an SMP alpha machine?  I am
> running 5.0-CURRENT as of 2001/12/27.  The system clock is falling behind
> quickly.  The machine has 3 250Mhz engines.  Running a "sleep 10" command
> actually sleeps for 20 seconds.
> 
> I am not as concerned about sleep taking so long as I am keeping the clock
> accurate for system processes and file time stamps.
> 
> Patrick Murphy
> Michigan State University

Hmm, the clock on the 2100A is known to run at about 1/2 speed (or so it feels
like) on an SMP kernel.  Not sure how to fix this.  You can try playing around
with it.  Perhaps halving the clock freq if SMP is detected for the 2100 family?

-- 

John Baldwin <jhb@FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve!"  -  http://www.FreeBSD.org/

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