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Date:      Wed, 1 Nov 2000 02:09:31 +0000
From:      Tony Finch <dot@dotat.at>
To:        Andre Oppermann <oppermann@telehouse.ch>
Cc:        Nat Lanza <magus@cs.cmu.edu>, Alfred Perlstein <bright@wintelcom.net>, Bosko Milekic <bmilekic@dsuper.net>, freebsd-net@FreeBSD.ORG
Subject:   Re: MP: per-CPU mbuf allocation lists
Message-ID:  <20001101020931.D18414@hand.dotat.at>
In-Reply-To: <39FEA159.EB774F1E@telehouse.ch>
References:  <Pine.BSF.4.21.0010301256580.30271-100000@jehovah.technokratis.com> <20001030104457.E22110@fw.wintelcom.net> <39FDD039.594CED43@telehouse.ch> <uoc7l6pyail.fsf@hurlame.pdl.cs.cmu.edu> <39FEA159.EB774F1E@telehouse.ch>

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Andre Oppermann <oppermann@telehouse.ch> wrote:
>
>Depends, if you look at Apache 2.0 it will run multithreaded. In the
>Apache case it could also make sense to keep the childs on the same
>CPU to avoid cache line thrashing. There are a lot of informations
>that flow between the parent Apache and the Childs (requests, filters,
>log entries...). It makes sense to run cgi's on a different CPU.

Very little information passes between the parent and children
processes of Apache. If you turn on Extended Status the children do
update some more information in shared memory (the "scoreboard") as
they proceed through a request, but other than restart signals that is
it.

Tony.
-- 
en oeccget g mtcaa    f.a.n.finch
v spdlkishrhtewe y    dot@dotat.at
eatp o v eiti i d.    fanf@covalent.net


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