Date: Sun, 23 Sep 2001 14:49:10 -0700 (PDT) From: Matt Dillon <dillon@earth.backplane.com> To: Julian Elischer <julian@elischer.org> Cc: Poul-Henning Kamp <phk@critter.freebsd.dk>, David Greenman <dg@root.com>, Seigo Tanimura <tanimura@r.dl.itc.u-tokyo.ac.jp>, bright@wintelcom.net, hackers@FreeBSD.ORG Subject: Re: Conclusions on... was Re: More on the cache_purgeleafdirs() routine Message-ID: <200109232149.f8NLnAV88904@earth.backplane.com> References: <1620.1001272770@critter> <200109232019.f8NKJZL88354@earth.backplane.com> <3BAE5283.C7B434CF@elischer.org>
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:Notice that both the user and system times increased..
:if there had been another parallel task, the overall system throughout may have
:decreased..
:
:I'm not saying this is wrong, just that we should look at other workloads too.
:no point in optimising the system for compiling itself.. that's not really a
:real-world task..
:lmost noo-one buys a freeBSD box so that they can compile freeBS.. they usually
:have other plans for what they want out of it...
:
:(of course this may effect other tasks in an even more positive way, but we
:should know that..)
Yah, but buildworld is all we can really do on test boxes. We will have
to wait for people to try these things on production squid, news, and
web server systems to get real-world numbers.
The timing difference is 1.1%. On two identical machines I got 1564
and 1553 seconds with the same config, which is 0.7%, so I expect the
std-dev is going to be, what, 1.4% or so? I'm running some comprehensive
buildworld tests now using /usr/bin/time -l and will post them when they
finish. These are very fast machines: 26 minute buildworld on -stable!
So I don't expect this to take very long.
-Matt
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