From owner-freebsd-smp  Wed Apr 21 12:21:13 1999
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From: Soren Schmidt <sos@freebsd.dk>
Message-Id: <199904211917.VAA34556@freebsd.dk>
Subject: Re: Really slow SMP
In-Reply-To: <19990421145208.8A7571F2A@spinner.netplex.com.au> from Peter Wemm at "Apr 21, 1999 10:52: 6 pm"
To: peter@netplex.com.au (Peter Wemm)
Date: Wed, 21 Apr 1999 21:17:50 +0200 (CEST)
Cc: darius@dons.net.au, freebsd-smp@FreeBSD.ORG
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It seems Peter Wemm wrote:
> > I have a dual pii-350 system, and I updated to -current on the 13th, it was
> > running -current before (on the 7th or so).
> Hmm!  Also, consider this from my dmesg:
> [..]
> Preloaded elf kernel "kernel" at 0xc02c8000.
> Pentium Pro MTRR support enabled, default memory type is uncacheable
> Probing for PnP devices:
> [..]
> 
> Memory type is uncacheable?!?  Is that saying what it sounds like?

I think it only refers to video memory etc, as my SMP box still 
runs at its normal pace, I'd be very surpriced if caching was
turned off altogether.

> (There is no MTRR synchronization like there was before.  Previously the
>  BSP would dump all it's MTRR registers to a table and all the other AP
>  cpus would load that table on startup.  That table doesn't exist anymore.)

That should be done again, havnt checked the new code for what it actually
does though...

-Søren


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