Date: Wed, 21 Jun 2006 11:52:10 -0700 From: "Nikolas Britton" <nikolas.britton@gmail.com> To: "Nikolas Britton" <nikolas.britton@gmail.com>, "Andy Reitz" <reitz@eecs.cwru.edu>, freebsd-questions@freebsd.org Subject: Re: migrating to 64-bit Message-ID: <ef10de9a0606211152o3be3e502y91264ed01ed39fe@mail.gmail.com> In-Reply-To: <20060621173253.GD7596@tigger.digitaltorque.ca> References: <20060620233551.GG11625@tigger.digitaltorque.ca> <Pine.SOL.4.53.0606201958420.14129@brak> <20060621011340.GI11625@tigger.digitaltorque.ca> <ef10de9a0606210342y67ff7c61le018aa6ffdd48313@mail.gmail.com> <20060621173253.GD7596@tigger.digitaltorque.ca>
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On 6/21/06, Michael P. Soulier <msoulier@digitaltorque.ca> wrote: > On 21/06/06 Nikolas Britton said: > > > IA64 = Itanium, Itanium2 = FreeBSD/ia64 > > EM64T = Intel CPUs with AMD64 (P4, Xeon, etc.) = FreeBSD/amd64 > > AMD64 = Opteron, Athlon 64, Turion 64, Sempron 64 = FreeBSD/amd64 > > > > http://en.wikipedia.org/wiki/EM64T > > > > Why do you need to run in 64-bit mode? > > I'm asking that myself. I'd like to do comparisons with and without 64-bit > support. > The consensus seems to be that FreeBSD/amd64 is a tad slower then FreeBSD/i386 because it has to deal with 32 extra bits. The primary reason to use FreeBSD/amd64 seems to be if you need greater then 4GB of RAM. This should give you the speed boost your looking for: CPUTYPE?=pentium2 CFLAGS+= -mtune=nocona COPTFLAGS+= -mtune=nocona Put that in /etc/make.conf and recompile ports/kern/world. -- BSD Podcasts @: http://bsdtalk.blogspot.com/ http://freebsdforall.blogspot.com/
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