Date: Sat, 14 Sep 1996 10:28:00 -0700 (PDT) From: "Rodney W. Grimes" <rgrimes@GndRsh.aac.dev.com> To: simonm@dcs.gla.ac.uk (Simon Marlow) Cc: jmb@freefall.freebsd.org, michaelh@cet.co.jp, mrcpu@cdsnet.net, jhs@freebsd.org, sysseh@devetir.qld.gov.au, current@freebsd.org Subject: Re: VM/kernel problems? Message-ID: <199609141728.KAA04566@GndRsh.aac.dev.com> In-Reply-To: <199609141315.GAA04505@GndRsh.aac.dev.com> from Simon Marlow at "Sep 14, 96 02:15:40 pm"
next in thread | previous in thread | raw e-mail | index | archive | help
> > Rod Grimes writes: > > > The default value could still be 64K incase none of the cache sizeable > > chipsets are found, but in my experience the only things that ever had > > 64K or 128K caches on them are old 386 boards and some of the earlier > > 486 boards. Thus if CPU >= I586 your going to have a 256K cache.... > > What about laptops that don't have a cache at all? If it doesn't hurt > too much, then fair enough, but otherwise we still need a way to > fiddle the setting at boot or kernel-compile time. Hummm... okay, but more correctly, what about laptops that only have an internal cache of either 0K, 4K or 8K-I/8K-D. (Any Pentium PRO laptops out there yet :-) :-)) I really doubt that this cache coloring is going to have much effect on machines without external cache, infact now that I think about it a little it should not matter what address patern is giving to external memory, it just won't effect performance. -- Rod Grimes rgrimes@gndrsh.aac.dev.com Accurate Automation Company Reliable computers for FreeBSD
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199609141728.KAA04566>