Date: Fri, 12 Oct 2007 12:11:05 +0200 From: Erik Trulsson <ertr1013@student.uu.se> To: Artem Kuchin <matrix@itlegion.ru> Cc: freebsd-stable@freebsd.org Subject: Re: how to compiel kernel and world to maxium optimization Message-ID: <20071012101105.GA29978@owl.midgard.homeip.net> In-Reply-To: <024901c80cb6$f49696b0$0c00a8c0@Artem> References: <024901c80cb6$f49696b0$0c00a8c0@Artem>
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On Fri, Oct 12, 2007 at 02:02:09PM +0400, Artem Kuchin wrote: > Hello! > > Somehow, i cannot find info now how to build kernel and world > very optimized to a particular machine. Maybe i am not looking > hard enough? > > The point is that if i have Xeon HT cpus (not very new, but > definitelly not Pentium PRO :) i can build kernel and world > using insttructions for this CPU and optimization for it, so > i would get myself a speedy system and less memory hungry, right? > > The only option known to me which is related to the isee is cpu > setting in kernel config file. Anything else? > > Thank you very much in advance You can set CPUTYPE in /etc/make.conf to have the compiler do some CPU-specific optimizations. You can also set CFLAGS/COPTFLAGS (for world/kernel) in /etc/make.conf to whatever flags the compiler supports. Don't complain if anything breaks though - you are only supposed to touch those flags if you know what you are doing. Don't expect any major (or even noticable) improvements from these settings though. -- <Insert your favourite quote here.> Erik Trulsson ertr1013@student.uu.se
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