Date: Thu, 24 Jan 2008 02:25:15 +0900 (JST)
Message-Id: <20080124.022515.226770887.ryov@valinux.co.jp>
To: a.p.zijlstra@chello.nl
Cc: linux-kernel@vger.kernel.org, dm-devel@redhat.com,
       containers@lists.linux-foundation.org,
       virtualization@lists.linux-foundation.org,
       xen-devel@lists.xensource.com
Subject: Re: [PATCH 0/2] dm-band: The I/O bandwidth controller: Overview
From: Ryo Tsuruta <ryov@valinux.co.jp>
In-Reply-To: <1201098755.6341.54.camel@lappy>
References: <20080123.215350.193721890.ryov@valinux.co.jp>
	<1201098755.6341.54.camel@lappy>
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Hi Peter,

> What definition of bandwidth does it use? Does it for example account
> for seek latency?

The bandwidth in dm-band is determined by the proportion of the
processing time of each device's tokens(I/Os) to the processing time
of all device's tokens(I/Os).
The processing time of one token(I/O) is determined by one I/O cycle 
include seek latency, interrupt latency, etc...

Thanks,
Ryo Tsuruta <ryov@valinux.co.jp>
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