linux-kernel - Re: 3ware disk latency?

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Message-ID: <b1bc6a000607261507g663ad95cwcc4a2ae4622e0fa2@mail.gmail.com>
Date:	Wed, 26 Jul 2006 15:07:28 -0700
From:	"adam radford" <aradford@...il.com>
To:	"dean gaudet" <dean@...tic.org>
Cc:	"Alan Cox" <alan@...rguk.ukuu.org.uk>,
	"Jan Kasprzak" <kas@...muni.cz>, linux-kernel@...r.kernel.org
Subject: Re: 3ware disk latency?

On 7/26/06, dean gaudet <dean@...tic.org> wrote:
>
> unfortunately when i did the experiment i neglected to perform
> simultaneous tests on more than one 3ware unit on the same controller.  i
> got great results from a raid1 or from a raid10 (even a raid5)... but
> never i only tested one unit at a time.
>

Did you try setting /sys/class/scsi_host/hostX/cmd_per_lun to 256 / num_units ?

-Adam
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