RE: [Xen-devel] Re: [PATCH] add long interrupt measurement capability

[Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>]

Perhaps.  However measuring cycles is important and, more
specifically, measuring MAX cycles spent across a set of
interrupts.  As a result, I suspect any code that measures
this (regardless of whether the result is reported by
xentrace or debug-key) would likely encounter the
same objection from Keir.

-----Original Message-----
From: Dulloor [mailto:dulloor@xxxxxxxxx]
Sent: Thursday, May 07, 2009 6:14 PM
To: Keir Fraser
Cc: Dan Magenheimer; Xen-Devel (E-mail)
Subject: Re: [Xen-devel] Re: [PATCH] add long interrupt measurement capability


Dan, Couldn't you add this to xentrace ?

-dulloor


On Wed, Apr 29, 2009 at 2:03 PM, Keir Fraser <keir.fraser@xxxxxxxxxxxxx> wrote:

On 29/04/2009 17:50, "Dan Magenheimer" <dan.magenheimer@xxxxxxxxxx> wrote:

> Since I see you are still taking boot-option patches
> for 3.4, I thought I'd retry this one which optionally
> measures cycles spent in each irq.  I thought
> you had just decided it was too late for 3.4... if
> you rejected it for another reason, please let me
> know.


I don't think it has sufficient general utility to be applied. Anyone who
would actually have the want and wit to run this option can apply the patch
themselves.

 -- Keir



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