Date: Fri, 15 May 1998 12:52:52 +0200 From: Eivind Eklund <eivind@yes.no> To: "Daniel O'Connor" <doconnor@gsoft.com.au> Cc: current@FreeBSD.ORG Subject: Re: People having problems with X windows? Message-ID: <19980515125252.54648@follo.net> In-Reply-To: <199805150902.SAA24178@cain.gsoft.com.au>; from Daniel O'Connor on Fri, May 15, 1998 at 06:32:57PM %2B0930 References: <19980515180916.J1953@freebie.lemis.com> <199805150902.SAA24178@cain.gsoft.com.au>
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On Fri, May 15, 1998 at 06:32:57PM +0930, Daniel O'Connor wrote: > > > > The code is still in there, but I guess there is the need for more > > > research into the issue. > > > > Excuse my ignorance, but what's WC in this context? > > It means Write-Combining, which you can enable on Pentium Pro and Pentium II > machine... It makes things Go Faster(tm) but I;m not sure what it does.. (ie > can someone please explain :) (Part of this is extrapolation and all of it is based on things I don't remember as well as I should. Take with a grain of salt.) It caches writes and do them as a single write, basically. This allow you to use e.g. burst modes, where an address is written into a RAM address line and then a series of RAM cells are written using an auto-increment mode for the address. The problems occur when you have control registers for an external device (e.g, a display adapter) - these don't tend to like being written this way. Eivind. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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