Date: Mon, 15 Jan 2007 12:39:21 -0800 From: Garrett Cooper <youshi10@u.washington.edu> To: freebsd-questions@freebsd.org Subject: Re: FreeBSD 6.2, rebuild the system with CPUTYPE=prescott? Message-ID: <45ABE679.6080207@u.washington.edu> In-Reply-To: <200701151515.34005.lists@jnielsen.net> References: <200701152042.35724.daniel.tourde@spray.se> <200701151515.34005.lists@jnielsen.net>
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John Nielsen wrote: > On Monday 15 January 2007 14:42, Daniel Tourde wrote: > >> Hello, >> >> Let me present myself: >> - I am an advanced user of Gentoo Linux. I know quiet a lot about that >> system and about how to optimize it to fit the hardware the best possible >> way. - I am a casual FreeBSD user. I like it a lot though, it is lean and >> very well structured. >> >> I am the happy own of a Dell Inspiron 9400 with a Dual Core processor in it >> (note, not a Dual Core 2). >> >> http://gentoo-wiki.com/Safe_Cflags gives some information about this >> processor and about the parameter to give to gcc to obtain the best out of >> it: >> >> Intel Core Solo/Duo (Yonah) >> vendor_id : GenuineIntel >> cpu family : 6 >> model : 14 >> model name : Genuine Intel(R) CPU [Model] @ XXXGHz >> (the above info is from a T2400, other models may have different cpu >> families and model numbers) >> CHOST="i686-pc-linux-gnu" >> CFLAGS="-march=prescott -O2 -pipe -fomit-frame-pointer" >> >> This is a 32bit chip >> Note: It has been confirmed by hongjiu.lu@intel.com that prescott is the >> correct microarchitecture to use with this CPU. >> >> So now, I am trying to rebuild my FreeBSD 6.2 system playing a bit with the >> parameters in the make.conf file (see /usr/share/examples/etc/make.conf) to >> get the best out of my machine (double processor, MMX, SSE[1-3] and co...) >> #CPUTYPE?=pentium3 >> #NO_CPU_CFLAGS= # Don't add -march=<cpu> to CFLAGS automatically >> #NO_CPU_COPTFLAGS= # Don't add -march=<cpu> to COPTFLAGS automatically >> >> >> So far, the only thing I did was to set CPUTYPE to pentium4 but I am pretty >> sure, it can be done in a better way. The question being 'how?' >> > > "prescott" is listed as an option for CPUTYPE > in /usr/share/examples/etc/make.conf. So "CPUTYPE?=prescott" > in /etc/make.conf should do fine for you. > > JN > Another thread to read: <http://lists.freebsd.org/pipermail/freebsd-questions/2007-January/139296.html>. -Garrett
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