From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S266154AbTIKG2w (ORCPT ); Thu, 11 Sep 2003 02:28:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S266160AbTIKG2v (ORCPT ); Thu, 11 Sep 2003 02:28:51 -0400 Received: from hermes.fachschaften.tu-muenchen.de ([129.187.202.12]:29157 "HELO hermes.fachschaften.tu-muenchen.de") by vger.kernel.org with SMTP id S266154AbTIKG2W (ORCPT ); Thu, 11 Sep 2003 02:28:22 -0400 Date: Thu, 11 Sep 2003 08:28:16 +0200 From: Adrian Bunk To: Alan Cox Cc: Linux Kernel Mailing List Subject: Re: RFC: [2.6 patch] better i386 CPU selection Message-ID: <20030911062816.GX27368@fs.tum.de> References: <200309071647.h87Glp4t014359@harpo.it.uu.se> <20030907174341.GA21260@mail.jlokier.co.uk> <1062958188.16972.49.camel@dhcp23.swansea.linux.org.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1062958188.16972.49.camel@dhcp23.swansea.linux.org.uk> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Sep 07, 2003 at 07:09:49PM +0100, Alan Cox wrote: >... > > I'm not sure if an Athlon is "lower" than a PII or not.... Which do I > > option do I pick, to run on either of those without including > > redundant stuff for older CPUs? > > Right now its ordered > > 386 - 486 - 586 - 586+TSC - 686 - PPro - PII - PIII - PIV > > Geode is a branch off 586+TSC and supports 686+ too > Athlon branches off from PIII if I remember rightly > Winchip branches off from 586 and supports all later x86 too > ELAN is its own weird world > Xmeta comes off 686 somewhere depending how you handle PGE x86 is a complicated family... My current list of CPU specific questions is: - Does the Cyrix III support 686 instructions? - Do -march=winchip{2,-c6} and -march=c3{,-2} add anything not in -march=i686 (except optimizations of otherwise compatible code)? - Which CPUs exactly need X86_ALIGNMENT_16? - X86_GOOD_APIC: Are there really that many processors with a bad APIC? TIA Adrian -- "Is there not promise of rain?" Ling Tan asked suddenly out of the darkness. There had been need of rain for many days. "Only a promise," Lao Er said. Pearl S. Buck - Dragon Seed