New Silicon Insider Article

Article: Sizing up the Super Heavyweights
By: Michael S (already5chosen.delete@this.yahoo.com), October 23, 2004 1:40 pm
Room: Moderated Discussions
Paul DeMone (pdemone@igs.net) on 10/23/04 wrote:
---------------------------
>Michael S (already5chosen@yahoo.com) on 10/23/04 wrote:
>---------------------------
>>Paul DeMone (pdemone@igs.net) on 10/22/04 wrote:
>>>
>>>Yep, that's probably the biggest reason. I also suspect
>>>it will give a noticable boost to IA-32 EL performance.
>>
>>According to my understanding, IA-32 EL put heavier pressure on the D-cache and
>>lighter pressure on the I-cache that the native IA-64 applications because all cold
>>spots which constitute >80% of the typical code are cached via D-side.
>>
>>Also split L2 cache probably increases the penalty on self-modifying code. That
>>will hurt performance for both IA-32 EL and Java. Performance of .Net will not be
>>hurt that much due to coarser-grained JITting.
>
>IA32 EL is not a combination emulator/translator like
>FX!32 or CMS. It does a first pass translation on newly
>encountered code and executes it. A native app has just
>the app code in icache. An IA32 EL app has both the code
>of the translator/optimizer and the app itself in icache. I
>think the big icache in Montecito will be a net win for IA32
>EL compared to McKinley/Madison.

I forgot that IA32 EL translates cold spots, sorry. Thank you for pointing it out.
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New Silicon Insider ArticleDavid Kanter2004/10/11 05:43 AM
  Good read. Thanks again Paul. (NT)Michael Menietti2004/10/11 06:36 AM
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