Date: Fri, 13 May 2005 22:51:23 +0200 From: Peter Korsten <peterk@maltanet.net> To: =?ISO-8859-1?Q?Jo=E3o_Carlos_Mendes_Lu=EDs?= <jonny@jonny.eng.br>, freebsd-amd64@freebsd.org Subject: Re: Actual benefits of amd64 over i386 Message-ID: <4285134B.8000903@maltanet.net> In-Reply-To: <4284FD37.2070009@jonny.eng.br> References: <BEA97082.3CD55%michael.hopkins@hopkins-research.com> <42842F46.9040608@samsco.org> <4284FD37.2070009@jonny.eng.br>
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João Carlos Mendes Luís wrote: > What about a 64 bit kernel, and mixed mode (32bit and 64bit) > userland? Solaris does this, and it sounds efficient, from the comments > I've seen in this list. Yeah well... I'm still to see significant performance benefits of 64 bits applications over 32 bits ones on my Sun Blade 100 at work. > The bad part: Most (probably all) libraries would duplicated, and > the kernel and compiler should be modified to understand this "feature". True, but it's just a compiler flag, really, for the libraries. It works well enough in Solaris. The kernel is a different issue that I won't comment upon, mostly because I don't know much about it. :) - Peter
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