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Subject: Re: Hammer info. And som SMP musings.

Author: Eugene Nalimov

Date: 17:29:19 03/26/02

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I would not trust POWER4 SPECint number too much. It was obtained at a multi-CPU
system with shared L3 cache when all CPUs but one were idle, so that one CPU
actually could use 16*8 == 128Mb of L3 cache. I doubt anybody ever will use
similar system for single-process calculations.

Eugene


On March 26, 2002 at 17:24:45, Tom Kerrigan wrote:

>On March 26, 2002 at 14:29:28, Vincent Diepeveen wrote:
>
>>If a 64 bits processor isn't faster than a 32 bits processor the processor
>>is nothing more than a bad joke of course.
>
>Why is that? You might as well say any processor that's not the fastest in the
>world is a bad joke. I don't see why the datapath width matters. And you're
>saying "faster" now instead of "clocked higher." If you want to talk faster, the
>POWER4 posts higher SPECint numbers than all current 32-bit processors.
>
>>>No matter how hard you backpedal, you're not going to get out of your idiot
>>>statement that "not a single 64 bits processor is clocked *near* 32 bits
>>>processors."
>>
>>I'm very right here. fastest 32 bits processor which i can buy is
>>clocked at 2.4Ghz now. Fastest 64 bits processor (let's not even
>>mention its insane price) is the power4 or something 1.3Ghz if
>>i remember well?
>
>You said "32 bits processors," not the fastest 32-bit processor. The POWER4, at
>1.3GHz, is most certainly clocked *near* (your word) the 1.7GHz Athlon, which is
>a perfectly good 32-bit processor.
>
>-Tom



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