Date: Sat, 22 Dec 2001 21:48:42 -0500 (EST) From: Mike Silbersack <silby@silby.com> To: Bruce Evans <bde@zeta.org.au> Cc: Matt Dillon <dillon@FreeBSD.org>, <cvs-committers@FreeBSD.org>, <cvs-all@FreeBSD.org> Subject: Re: cvs commit: src/sys/dev/sio sio.c Message-ID: <Pine.BSF.4.30.0112222142580.51733-100000@niwun.pair.com> In-Reply-To: <20011223132947.K10139-100000@gamplex.bde.org>
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On Sun, 23 Dec 2001, Bruce Evans wrote: > This setting is intentional. The default setting provides twice as much > slop as the 8250 UARTs which the driver was designed to support on systems > hundreds of times slower than current ones. Making it twice as large > again doesn't help much. > > This commit will was not approved or even sent for review to the maintainer > and will be backed out in a minute. > > Bruce Ok, I'll buy into the idea that we shouldn't have interrupt latency. However, people have indicated that more frequent interrupts solve their overflow problems. Is there real harm in using more frequent interrupts? If no, then Matt's change should be left in. If yes, explain why. References to old hardware are not relevant - the performance of 4.5-prerelease on modern hardware are. Thanks, Mike "Silby" Silbersack To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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