Date: Sat, 8 Apr 2000 21:25:16 +0700 (NOVST) From: "Alexey N. Dokuchaev" <danfe@inet.ssc.nsu.ru> Cc: freebsd-hackers@freebsd.org Subject: What are the best gcc optimization options for Pentium 200 MMX Message-ID: <Pine.LNX.4.10.10004082114170.23805-100000@inet.ssc.nsu.ru> In-Reply-To: <Pine.BSF.4.10.10004080851240.59286-100000@pawn.primelocation.net>
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Hi! AFAIK, Linux Mandrake has it's kernel and userland highly optimized for Pentium architecture. However, they have additional gcc optimization flags turned on by default, including -O3 and -mfast_math. I'm trying to achive maximum performance of my FreeBSD 4.0-RELEASE box, and going to recompile kernel and world using -Os -pipe options. Is there any additional flags I might consider turning on (like -mfast_math) to make both kernel and world work at the top performance I can achieve? Of course, I could just man gcc and turn every option I find useful, but I don't have _that_ much experience with gcc as (I am sure) certain people on this maillist have. So not to run into any problems in the future caused by my 'overoptimized' system, I would like to get deep and full answer here. Thank you in advance. System is: genuine intel Pentium 200 MMX proc, 64M memory, FreeBSD 4.0-R P.S. Please cc me directly, since I am not the member of this list. Cheers, /* Alexey N. Dokuchaev, more commonly | */ /* known as DAN Fe | mailto:danfe@inet.ssc.nsu.ru */ /* | ICQ UIN: 38934845 */ /* Novosibirsk State University | http://inet.ssc.nsu.ru/~danfe/ */ /* Scientific Study Center Computer Lab | */ [Team Assembler] [Team BSD] [Team DooM] [Team Quake] -----BEGIN GEEK CODE BLOCK----- Version: 3.12 GCS d-@ s+: a--- C++(+++) UBL++++$ P++>$ L+ E-- W++ N++ o? K? w-- O- M V- PS PE Y+ PGP+ t+ 5+ X+ R- !tv b++ DI+ D+++ G++ e h !r !y+ ------END GEEK CODE BLOCK------ Microsoft: Where do you want to go today? Linux: Where do you want to go tomorrow? FreeBSD: Are you guys coming or what? Microsoft: What are we going to rip off today and claim as our own? Microsoft: Where do you want to be taken today? To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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