From: Helge Hafting <helgehaf@idb.hist.no>
To: elenstev@mesatop.com, linux-kernel@vger.kernel.org
Subject: Re: UP 2.2.18 makes kernels 3% faster than UP 2.4.0-test12
Date: Tue, 12 Dec 2000 12:01:11 +0100 [thread overview]
Message-ID: <3A360577.CC5E776E@idb.hist.no> (raw)
In-Reply-To: <Pine.Linu.4.10.10012120529110.970-100000@mikeg.weiden.de> <00121122173600.03488@localhost.localdomain>
Steven Cole wrote:
[...]
> Simple question here, and risking displaying great ignorance:
> Does it make sense to use make -jN where N is much greater than the
> number of CPUs?
No, but it makes sense to have N at least one more than the number of
cpus,
if you have the memory. This because your processes occationally
will wait for disk io, and this time may then be utilized to
run the "extra" task. But don't overdo it, as you get less disk
cache this way. make -j3 seems to be fastest on my 2-cpu machine
with 128M ram.
Helge Hafting
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next prev parent reply other threads:[~2000-12-12 11:32 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-12-10 15:31 UP 2.2.18 makes kernels 3% faster than UP 2.4.0-test12 Steven Cole
2000-12-10 19:52 ` Aaron Tiensivu
2000-12-11 23:02 ` Steven Cole
2000-12-12 4:40 ` Mike Galbraith
2000-12-12 5:17 ` Steven Cole
2000-12-12 5:20 ` Mike Galbraith
2000-12-12 11:01 ` Helge Hafting [this message]
2000-12-12 10:27 ` Rik van Riel
2000-12-12 14:15 ` Mike Galbraith
-- strict thread matches above, loose matches on Subject: below --
2000-12-10 20:36 Steven Cole
2000-12-11 18:16 ` John Fremlin
2000-12-11 18:38 ` Rik van Riel
2000-12-11 18:46 ` Alan Cox
2000-12-11 19:50 ` Zdenek Kabelac
2000-12-11 20:15 ` Arjan van de Ven
2000-12-11 20:23 ` Rik van Riel
2000-12-11 22:03 ` Gerhard Mack
2000-12-11 22:06 ` Alan Cox
2000-12-13 9:44 ` Rogier Wolff
2000-12-14 13:08 ` Russell King
2000-12-16 0:40 ` george anzinger
2000-12-12 14:49 ` Steven Cole
2000-12-12 18:18 ` Steven Cole
2000-12-12 18:40 ` Linus Torvalds
2000-12-12 20:19 ` Steven Cole
2000-12-12 20:38 ` Linus Torvalds
2000-12-12 22:09 ` Steven Cole
2000-12-11 22:12 ` Gabor Lenart
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