Date: Fri, 30 Nov 2001 17:30:33 -0800 From: Luigi Rizzo <rizzo@aciri.org> To: Mike Silbersack <silby@silby.com> Cc: Leo Bicknell <bicknell@ufp.org>, Alfred Perlstein <bright@mu.org>, freebsd-hackers@FreeBSD.ORG Subject: Re: TCP Performance Graphs Message-ID: <20011130173033.G33041@iguana.aciri.org> In-Reply-To: <Pine.BSF.4.30.0111301717290.10049-100000@niwun.pair.com> References: <20011130171418.B96592@ussenterprise.ufp.org> <Pine.BSF.4.30.0111301717290.10049-100000@niwun.pair.com>
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On Fri, Nov 30, 2001 at 05:19:18PM -0500, Mike Silbersack wrote: > > On Fri, 30 Nov 2001, Leo Bicknell wrote: > > > * The logging at 90% usage should be investigated. I can probably ... > Luigi, Jonathan and I had already been discussing this idea before this > this thread even started. If you come up with a good patch to do this, I just committed to current (and soon to stable) some code to log _failures_ in mbuf allocations, but that is only meant as an aid to remove worse code in the drivers. I'd be inclined to say that the XX% monitoring is better done by userlevel daemons periodically polling the mbuf stats, rather than doing some extra work every time you allocate or free an mbuf. (Plus, just setting a threshold is not good, you also want some histeresys, because you can easily conceive a system that runs at XX % mbuf occupation, whatever XX you pick.) cheers luigi To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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