From owner-freebsd-questions Wed Dec 24 15:41:01 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id PAA10123 for questions-outgoing; Wed, 24 Dec 1997 15:41:01 -0800 (PST) (envelope-from owner-freebsd-questions) Received: from gdi.uoregon.edu (cisco-ts12-line10.uoregon.edu [128.223.150.142]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id PAA10117 for ; Wed, 24 Dec 1997 15:40:56 -0800 (PST) (envelope-from dwhite@gdi.uoregon.edu) Received: from localhost (dwhite@localhost) by gdi.uoregon.edu (8.8.7/8.8.8) with SMTP id PAA10246; Wed, 24 Dec 1997 15:40:47 -0800 (PST) (envelope-from dwhite@gdi.uoregon.edu) Date: Wed, 24 Dec 1997 15:40:47 -0800 (PST) From: Doug White X-Sender: dwhite@localhost Reply-To: Doug White To: "Jay M. Richmond" cc: freebsd-questions@FreeBSD.ORG Subject: Re: npx0: the right flags (if any) for Intel pentium? In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-questions@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk On Tue, 23 Dec 1997, Jay M. Richmond wrote: > Hello, > I've built up an Intel pentium machine, and I remember reading something > about the recommended flags for npx0 being "0x0." What exactly does this > do? I've been searching the mailing lists for a while and have come up > short. Nothing; 0x0 is the stock default mode. Just leave it as is. > So my question is, what flags for npx0 will optimize it for the Pentium or > is it already OK by default. on my K6 i use 0x7, and that was easily > found by searching the mailing lists. what about an intel pentium? 0x7 disables the Pentium-optimized bcopy(), bzero(), and copyio() functions in the kernel. This is probably because they don't work as well as they do on the stock P5. On real Pentiums keep the flags at 0. Doug White | University of Oregon Internet: dwhite@resnet.uoregon.edu | Residence Networking Assistant http://gladstone.uoregon.edu/~dwhite | Computer Science Major