[Developers] Re: [Flesh-cvs] DEVELOPMENT CVS "Cactus/doc ReleaseNotes"

Tom Goodale goodale at cct.lsu.edu
Tue Nov 2 18:26:16 CST 2004


Interesting.  Would you be able to test/give us access to test, on one of 
these AMD boxes for the next beta release ?

Tom

On Tue, 2 Nov 2004, John Shalf wrote:

>
> Well one thing that is interesting is that the Intel beta 8.1 compilers for 
> the EMT64 generate code that outright refuses to run on our AMD boxes.  Intel 
> support told us that this was to protect us from the subtle differences 
> between the two architectures, but wasn't able to provide any depth to the 
> description.  It must be inserting some code to check some privileged/hidden 
> register on the nocona chips because I can't imagine how it would figure it 
> out otherwise.  The differing instructions are only invoked for OS activites 
> (its not something that makes sense to use in user space).
>
> -john
>
>
>
> On Nov 2, 2004, at 4:11 PM, Tom Goodale wrote:
>> I thought there were some subtle differences between them ?  So as the box 
>> we did test on was an intel one, it may be best to be precise.
>> 
>> Tom
>> 
>> On Wed, 3 Nov 2004, Jonathan Thornburg wrote:
>> 
>>> Hi, Tom,
>>> 
>>> In the beta15 release notes just committed to CVS, you wrote
>>>>   - We have tested Cactus on three new architectures, the SGI Altix,
>>>>     Intel's new Extended Memory 64 Technology, and Microsoft's XBox,
>>>>     ==========================================
>>>>     all running Linux.
>>> 
>>> Should we maybe mention that this is often called "AMD64"?
>>> Notably, that's what http://www.x86-64.org was calling it long before
>>> intel came up with the name "EMT64".
>>> As another exmaple, http://www.redhat.com/software/rhel/es/
>>> calls it "AMD64/EMT64".  I would suggest mentioning all three names:
>>> x86-64, AMD64, and EMT64.
>>> 
>>> ciao,
>>> 
>>> 
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