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Subject: Re: IA-64 vs OOOE (attn Taylor, Hyatt)

Author: Tom Kerrigan

Date: 18:37:19 02/15/03

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On February 13, 2003 at 15:46:26, Eugene Nalimov wrote:

>Some time ago I wrote in the (lost) thread: please compare Itanium2 not with
>P4/Athlon/etc., but with server CPUs. I.e. with 4-way Xeons, Power4, etc.

I don't know how I got dragged into talking about x86 at all. Everybody seems to
assume that I want to prove that the P4 is better than the I2 in all cases no
matter what. The comparison I'm interested in is Opteron vs. I2...

>benchmarks it resembles real-world server-like code a most: it's (relatively)
>large, execution time not spent in several functions but heavily spread across
>lot of functions, lot of loops across pointer chains, lot of calls,
>unpredictable branches, etc.

In other words, it's suited to chips with lots of cache or low latency memory
and low branch mispredict penalties. Opteron addresses all of these issues.

-Tom



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