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Date:      Tue, 7 Mar 2000 08:20:07 +0100
From:      Wilko Bulte <wilko@yedi.iaf.nl>
To:        Andrew Gallatin <gallatin@cs.duke.edu>
Cc:        "Waite, Michael" <Michael.Waite@compaq.com>, freebsd-alpha@FreeBSD.ORG
Subject:   Re: Alpha ISO is fantastic!
Message-ID:  <20000307082006.A52415@yedi.iaf.nl>
In-Reply-To: <14528.17265.955978.964252@grasshopper.cs.duke.edu>; from gallatin@cs.duke.edu on Fri, Mar 03, 2000 at 06:03:27PM -0500
References:  <212CC57E84B8D111AD780000F84AA049083C2C11@mroexc2.tay.dec.com> <20000303232726.A5993@yedi.iaf.nl> <14528.17265.955978.964252@grasshopper.cs.duke.edu>

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On Fri, Mar 03, 2000 at 06:03:27PM -0500, Andrew Gallatin wrote:
> 
> Wilko Bulte writes:
>  > I'd be very interested to see how the XP1000 behaves running X as I see
>  > problems on all my Alphas (Miata GL , Miata MX5 and EB64+/Aspen Alpine)
>  > when running X.
> 
> I suspect that it will do much better because a tsunami chipset
> behaves a lot like an x86 on bad accesses -- reads to bad addresses in
> device memory return -1 and writes are ignored.  All other platforms
> give you a machine check.  This confused the heck out of me when I was
> doing the tsunami support.
> 
> On a related note -- Wilko, can you try compiling X with either -O or
> -O0?  I just tracked down a nasty bug troubling somebody else which
> was caused by gcc generating bad code.  I have a sneaking suspicion
> that the compiler might be behind at least some of your pain.

Just tried the S3 server freshly compiled with -O0 and the same h/w
as my previous test. No joy, spontaneous reboot again.

-- 
Wilko Bulte 			Arnhem, The Netherlands	  
http://www.tcja.nl  		The FreeBSD Project: http://www.freebsd.org


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