Date: Tue, 25 Dec 2001 20:51:18 -0700 From: Nate Williams <nate@yogotech.com> To: Matthew Dillon <dillon@apollo.backplane.com> Cc: Poul-Henning Kamp <phk@critter.freebsd.dk>, Peter Jeremy <peter.jeremy@alcatel.com.au>, David Greenman <dg@root.com>, Bruce Evans <bde@zeta.org.au>, Mike Silbersack <silby@silby.com>, cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/dev/sio sio.c Message-ID: <15401.18742.50318.472163@caddis.yogotech.com> In-Reply-To: <200112241019.fBOAJDO05785@apollo.backplane.com> References: <83382.1009180276@critter.freebsd.dk> <200112241019.fBOAJDO05785@apollo.backplane.com>
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> In anycase, the difference between MEDH and HIGH is that MEDH gives > us 8 character times of slop before the FIFO overflows, while HIGH > gives us only 2 character times. For what it's worth, Windows (in all of it's incarnations) sets the trigger level to FreeBSD's old version (14) on 16550s, and people don't seem to have any problems with it. The implication is pretty sad when Windows 95/98/ME/NT/2K/XP *all* have better interrupt latency than FreeBSD. :( Nate To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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