Date: Fri, 09 Jan 2004 13:31:39 +0100 From: Klaus Robert Suetterlin <krs@robert2.mpe-garching.mpg.de> To: freebsd-current@freebsd.org Subject: writing to 3ware escalade uses up 100% cpu time in system. Message-ID: <200401091231.i09CVdBG049283@robert2.mpe-garching.mpg.de>
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Hello,
I'm using a 3ware 8506-4LP controller with 4 250GB harddrives in
Raid 0. All space is in a single slice, separated into 1GB swap and
the rest into twed0s1d which is mounted under /space...
When I do
``dd if=/dev/zero of=/space/test bs=1000000 count=10000''
the twed0 maxes out at 70MB/sec and (according to systat) 70% usage.
Unfortunately my system goes to 100% cpu usage at the same time.
My kernel is running with all Whitnesses and Invariants switched
off. I had them on before, but then I got only 30% usage and
30MB/sec when cpu weht to 100%.
I would really love to be able to use the aproximate 100MB/sec at
100% usage of the twed0, without using all that much cpu.
-- Robert S.
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