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Date: Tue, 5 Nov 2013 15:07:03 +0100
Message-ID: <CAPjTQNF5Q=sPaTSpjnwpVOjiM9e70T0ve-GQ71Sv0zHx_Az7dg@mail.gmail.com>
Subject: [10-STABLE, 11-CURRENT] something wrong between cam and eventtimer or
 geom and eventtimer
From: Oliver Pinter <oliver.pntr@gmail.com>
To: freebsd-stable@freebsd.org, current@freebsd.org
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Cc: davide@freebsd.org, mav@freebsd.org
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Hi all!

The machine is a Haswell machine, the disc performance was very poor
(20-30MByte/sec).
When I change the kern.eventtimer.idletick from 0 to 1, the normal
performance restored back to normal (70-90MByte/sec).

The default eventtimer was LAPIC.

On other machine Q9300, this was fully reproducible.