Date: Wed, 24 Dec 1997 15:40:47 -0800 (PST) From: Doug White <dwhite@gdi.uoregon.edu> To: "Jay M. Richmond" <jayrich@room101.sysc.com> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: npx0: the right flags (if any) for Intel pentium? Message-ID: <Pine.BSF.3.96.971224153643.10003e-100000@localhost> In-Reply-To: <Pine.BSF.3.96.971223224859.5400A-100000@room101.sysc.com>
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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
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