Date: Wed, 26 Dec 2001 11:33:34 -0800 From: Terry Lambert <tlambert2@mindspring.com> To: Luigi Rizzo <rizzo@aciri.org> Cc: John Baldwin <jhb@FreeBSD.org>, Bruce Evans <bde@zeta.org.au>, current@FreeBSD.org, Peter Wemm <peter@wemm.org> Subject: Re: vm_zeropage priority problems. Message-ID: <3C2A260E.D7F6E2CC@mindspring.com> References: <20011222023741.P5064-100000@gamplex.bde.org> <XFMail.011221090705.jhb@FreeBSD.org> <20011221095058.A17968@iguana.aciri.org>
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Luigi Rizzo wrote: > > Don't know how interesting this can be, but i am writing > (no plans to commit it, unless people find it interesting) > some code to implement a weight-based instead of priority-based > scheduler. The code is basically the WF2Q+ scheme which is > already part of dummynet, adapted to processes. > It is quite compact, and i think i can make it reasonably > compatible with the old scheme, i.e. a sysctl var can be > used to switch between one and the other with reasonably > little overhead. > > This would help removing the ugly property that priority-based > have, which is that one process can starve the rest of the system. Look for "QLINUX". There's a nice paper on "Weighted Fair Share" scheduling referenced on the page, as well as a couple of LRP references. Note that someone recently did a port of the LRP + Resource Containers code to FreeBSD 4.4 (Terrible Rice Univeristy License, though). -- Terry To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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