From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Alan D. Brunelle" Date: Mon, 26 Mar 2007 15:09:56 +0000 Subject: Re: how to understand the Q2Q in btt result? Message-Id: <4607E244.7060000@hp.com> List-Id: References: <1174876819.6887.2.camel@localhost.localdomain> In-Reply-To: <1174876819.6887.2.camel@localhost.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-btrace@vger.kernel.org Ming Zhang wrote: > On Mon, 2007-03-26 at 09:58 -0400, Alan D. Brunelle wrote: > >>> maybe a similar D2D will be a nice >>> device indicator as well. >>> >>> >> This would be an indicator of how quickly lower-layer device drivers are >> getting issued IOs. It would be trivial to implement, if you are >> interested in it, I can do it... >> > > i think this will be interesting when compare with Q2Q to see how block > layer smooth/intense the io. > > I will look into adding this later today. Alan