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From "Shapira, Yoav" <Yoav.Shap...@mpi.com>
Subject RE: Hyperthreading performance dead !
Date Thu, 26 Feb 2004 13:44:48 GMT

Howdy,
Not a tomcat issue.  As (Ralph I think it was?) said, it's between the
JVM implementation and the OS threading library.  Others have noted bad
performance on HT machines.  Tiger (JDK 1.5) on Intel is supposed to be
better.

Yoav Shapira
Millennium ChemInformatics


>-----Original Message-----
>From: StokesP@quinn-direct.com [mailto:StokesP@quinn-direct.com]
>Sent: Thursday, February 26, 2004 7:30 AM
>To: tomcat-user@jakarta.apache.org
>Subject: Hyperthreading performance dead !
>
>Hi.
>
>I've been testing my Java app in Tomcat on a Hyperthreading Dell PC -
>identical to current production dell bar HT. The app runs more than 20x
as
>slow compared with existing system. There is no difference at all
hardware
>/ software apart from HT.
>
>Does Tomcat work on Hyperthreading PC's / any1 else had & solved this
>problem ??
>
>Thanks,
>Pete.
>
>QUINN-direct Insurance Limited is regulated by the Irish Financial
Services
>Regulatory Authority
>
>
>
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