From owner-freebsd-hackers Sat Apr 8 16:51:49 2000 Delivered-To: freebsd-hackers@freebsd.org Received: from salmon.maths.tcd.ie (salmon.maths.tcd.ie [134.226.81.11]) by hub.freebsd.org (Postfix) with SMTP id E0CFA37B710 for ; Sat, 8 Apr 2000 16:51:40 -0700 (PDT) (envelope-from dwmalone@maths.tcd.ie) Received: from walton.maths.tcd.ie by salmon.maths.tcd.ie with SMTP id ; 9 Apr 2000 00:51:33 +0100 (BST) Date: Sun, 9 Apr 2000 00:51:33 +0100 From: David Malone To: "Alexey N. Dokuchaev" Cc: freebsd-hackers@freebsd.org Subject: Re: What are the best gcc optimization options for Pentium 200 MMX Message-ID: <20000409005133.A86187@walton.maths.tcd.ie> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 1.0.1i In-Reply-To: ; from danfe@inet.ssc.nsu.ru on Sat, Apr 08, 2000 at 09:25:16PM +0700 Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Sat, Apr 08, 2000 at 09:25:16PM +0700, Alexey N. Dokuchaev wrote: > 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? I thought there was no floating point code in the kernel, and so -mfast-math wouldn't make any difference. I presume Linux doesn't have any FPU code in the kernel either, to save having to save/restore the registers on syscalls? David. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message