Date: Fri, 22 Sep 2000 09:56:44 +0700 From: John Indra <john@indocyber.com> To: Glenn Johnson <gjohnson@nola.srrc.usda.gov> Cc: "S. David Pullara" <sdpullara@telus.net>, freebsd-questions@FreeBSD.ORG Subject: Re: Intel cpu's and the -march switch Message-ID: <20000922095644.A43762@indocyber.com> In-Reply-To: <20000921134425.A91788@node1.cluster.srrc.usda.gov>; from gjohnson@nola.srrc.usda.gov on Thu, Sep 21, 2000 at 01:44:25PM -0500 References: <14794.8801.494001.718949@yuggoth.warpedspace.org> <20000921134425.A91788@node1.cluster.srrc.usda.gov>
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On Thu, Sep 21, 2000 at 01:44:25PM -0500, Glenn Johnson wrote: |You will not notice any perceptible performance improvement but you may |notice your kernel and/or programs acting strangely after compiling with |those options. I would recommend that you _not_ bother with the -march |or -mcpu options. How strange? I've been having this /etc/make.conf entry on my personal workstation since the day FreeBSD 4.1-RELEASE (now, it's FreeBSD 4.1-STABLE) was out: CFLAGS= -O6 -march=pentiumpro -funroll-loops -fstrength-reduce -ffast-math -fexpensive-optimizations -fomit-frame-pointer -pipe COPTFLAGS= -O6 -march=pentiumpro -funroll-loops -fstrength-reduce -ffast-math -fexpensive-optimizations -fomit-frame-pointer -pipe CXXFLAGS+= -fmemoize-lookups -fsave-memoized This is not my production machine, only the machine I used daily as: web servers, proxy, firewall&NAT, mail server, DNS, and I use GIMP and XMMS a lot. In working hours, my baby is ``tortured'' really bad, a lot of request from approximately 40 other Windows based PC. It's a Compaq Deskpro with Pentium III 500 MHz and 256 MB of RAM. Days of uptime, without any unintentional reboots, and my feeling tells me that with those optimization, my machine runs faster :))) Regards, John To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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