[CentOS] CentOS4_64 On Dell

On Tue, 3 May 2005, Peter Farrow wrote:

> Thanks Ryan,
>
> I have already posted a reply while you were typing your...
>
> go take a look......

Right, and while your comments are generally correct, specifically when 
discussing HPC applications for the processors concerned,
 	a) the original comments were not sufficiently useful to draw the 
distinction,
 	b) even if HPC specialists (this is my day job also) may decide to 
draw such a distinction between EM64T and opteron (and I would say that 
certainly not all of the folks on the various beowulf lists would use the term 
64bit the way you were using it), the fact is that the industry in general, 
and Intel/RedHat/Dell (the three comanies featuring in this discussion) have 
settled upon a different definition of a 64bit CPU than you have.

Also, as for the speed of EM64T when runnin 32bit versus 64bit, once again the 
HPC mantra must be "it depends upon your application", because I have seen a 
number of cases where it can go either way.

and yes, I use both EM64T and opteron, yet for much the same reasons that you 
have already given, we tend to lean heavily to the opteron.

regards,
-Ryan
>
> P.
>
>
> Ryan Sweet wrote:
>
>> On Tue, 3 May 2005, Peter Farrow wrote:
>> 
>>> You may of course believe what you like.......
>> 
>> 
>> M. Farrow,
>> 
>> I am quite convinced that M. Baker-LePain is not discussing matters of 
>> belief, but of fact (fact that was on Intel's roadmap two years ago and has 
>> been a released product for nine months).  Please it is preferable if you 
>> don't begin arguments, but if you choose to have an argument at least start 
>> with a remotely tenable position.
>> 
>> http://www.intel.com/products/processor/xeon/index.htm
>> 
>> It is true that the original xeons were 32bit cpus, but Intel chose to keep 
>> the Xeon name for its EM64T technology.
>> 
>> regards,
>> -Ryan
>> 
>>> 
>>> Joshua Baker-LePain wrote:
>>> 
>>>>> "based on the same x86_64 technology that AMD introduced with their 
>>>>> Opterons."
>>>> 
>>>> 
>>>> If you didn't top post, you wouldn't have to re-type my quote.
>>> 
>> 
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-- 
Ryan Sweet             <ryan.sweet at aoes.com>
Advanced Operations and Engineering Services
AOES Group BV            http://www.aoes.com
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