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Date: Sun, 15 Jan 2006 15:38:11 -0700
From: Greg Lewis <glewis@eyesbeyond.com>
To: Huang wen hui <hwh@gddsn.org.cn>
Message-ID: <20060115223811.GA66735@misty.eyesbeyond.com>
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Cc: java@freebsd.org
Subject: Re: Performance patch for jdk1.5.0/amd64
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On Sun, Jan 15, 2006 at 05:45:40PM +0800, Huang wen hui wrote:
> Huang wen hui wrote:
> 
> >hi,
> >I recently notice that jdk1.5.0-p2/amd64 is slower than jdk1.5.0-p2/i386
> >on the same hardware in some situation.
> >  
> >
> I only got this problem on EM64T box, the "real" amd64 box do not affect.

It looks like something to do with AMD64 having prefetchw and EM64T needing
to use prefetcht0 instead.

-- 
Greg Lewis                          Email   : glewis@eyesbeyond.com
Eyes Beyond                         Web     : http://www.eyesbeyond.com
Information Technology              FreeBSD : glewis@FreeBSD.org