Date: Tue, 22 Feb 2005 22:48:21 +0100 From: cpghost@cordula.ws To: Robert Watson <rwatson@FreeBSD.org> Cc: freebsd-stable@freebsd.org Subject: HZ=1000 on slow CPUs considered harmful? Message-ID: <20050222214821.GA66879@epia2.farid-hajji.net> In-Reply-To: <Pine.NEB.3.96L.1050222195429.68237B-100000@fledge.watson.org> References: <20050222193858.1C18C5D07@ptavv.es.net> <Pine.NEB.3.96L.1050222195429.68237B-100000@fledge.watson.org>
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On Tue, Feb 22, 2005 at 07:56:03PM +0000, Robert Watson wrote: > In 6-CURRENT, HZ is 1000 for amd64, i386, and ia64, but 100 for other > platforms (i.e., ppc, arm, and alpha). I'm not opposed to merging the HZ > change to RELENG_5 at some point, but given that occasional nits, such as > the TCP nit, are turning up, I think it's worth waiting until after 5.4. Wouldn't that be a problem for slow CPUs like VIA C3 (EPIA) or GEODE (Soekris)? For fast CPUs, it's not that much overhead, but for slow CPUs? Can HZ remain user-configurable? > Robert N M Watson Thanks, -cpghost. -- Cordula's Web. http://www.cordula.ws/
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