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[Xen-devel] [PATCH] add long interrupt measurement capability

To: "Xen-Devel (E-mail)" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Subject: [Xen-devel] [PATCH] add long interrupt measurement capability
From: Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>
Date: Wed, 29 Apr 2009 09:50:04 -0700 (PDT)
Delivery-date: Wed, 29 Apr 2009 09:51:07 -0700
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Hi Keir --

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


> From: Dan Magenheimer 
> Sent: Tuesday, April 14, 2009 9:39 AM
> To: Keir Fraser; Tian, Kevin; Xen-Devel (E-mail)
> Subject: RE: [Xen-devel] million cycle interrupt
> But first, Keir, would you take this patch so that this
> kind of issue can be more easily diagnosed in the future?
> If you're worried about the extra two global variable
> reads, you could wrap an "#ifndef NDEBUG" around it
> (with #else #define opt_measure_irqs 0), but it might
> be nice to have this diagnostic capability in released
> code.

Attachment: measure_irq.patch
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