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Subject: Re: Question for Bob Hyatt

Author: Robert Hyatt

Date: 15:27:49 02/19/03

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On February 19, 2003 at 17:42:53, Pavel Blokhine wrote:

>On February 19, 2003 at 12:53:30, Robert Hyatt wrote:
>
>>On February 19, 2003 at 11:32:21, Pavel Blokhine wrote:
>>
>>>You seem to know about computer more than anyone here, so i would like to know
>>>how well this computer will do using Deep Junior 7 or Deep Fritz 7 and Frizt 8?
>>>
>>>From IBM
>>>
>>>pSeries 690
>>>
>>>8- to 32-way SMP server utilizing the first ever POWER4 dual processor on a chip
>>>using IBM advanced silicon-on-insulator and copper technologies.
>>
>>The problem is that this is not a SMP server as the world defines SMP.  I have
>>not looked
>>at it closely, but in the past, such machines from IBM were based on a
>>message-passing
>>architecture rather than shared memory.  Whether this machine fits that
>>description or
>>whether it is another NUMA system is something I'll try to look into and post a
>>follow-up
>>here...
>>
>>
>>>
>>>
>>>Processor
>>>64-bit POWER4
>>>
>>>Clock rates (Min/Max)
>>>1.1GHz / 1.3GHz
>>>
>>>System memory (Std/Max)
>>>8GB / 256GB
>>>
>>>Internal storage (Std/Max)
>>>36.4GB / 18.7TB
>>>
>>>Performance (rPerf range)***
>
>>>12.72 to 50.56
>
>
>I found them in the IBM website. I just wanted to know how well a computer using
>32 processors and 256 GB of ram will perform against a GM or a Dual.


If it is a NUMA machine, the dual will probably kill it until the program is
modified to
work on that kind of architecture.  In a classic NUMA machine, it is possible
for 32 processors
to run slower than one processor, if memory usage is not very carefully
controlled.



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