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From: ersatz splatt <ersatzsplatt@gmail.com>
To: jack_wang@usish.com, lindar_liu@usish.com
Cc: linux-scsi@vger.kernel.org
Subject: pm8001 performance degradation?
Date: Mon, 11 Jul 2011 12:06:15 -0700	[thread overview]
Message-ID: <CAHQAjVFuvh72uJ4x9g-P0XrihfWfUt1YtipTJgd9iXzTS+Vz=w@mail.gmail.com> (raw)

Hello Jack Wang and Lindar Liu,


I am running the pm8001 driver (on applicable hardware including a
several core SMP server).

When I run on an older kernel -- e.g. 2.6.34.7 -- I get about 73Kiops
via an fio test.

When I run a current kernel -- e.g. 2.6.39.2 -- on the same system and
same storage I get about 15Kiops running the same fio test.

Perhaps something has changes in the kernel that is not being accounted for?
Are you two still maintaining this driver?


Regards,
David

             reply	other threads:[~2011-07-11 19:06 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-07-11 19:06 ersatz splatt [this message]
2011-07-12  1:27 ` pm8001 performance degradation? Jack Wang
2011-07-12  2:44   ` ersatz splatt
2011-07-12  2:46     ` ersatz splatt
2011-07-12  4:18     ` Jack Wang
2011-07-12 19:34       ` ersatz splatt
2011-07-13  3:15         ` ersatz splatt
2011-07-13  4:08           ` Jack Wang

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