[Xen-devel] Accuracy of xentop

To: "xen-devel@xxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxx>
From: Candid Shot <candid_shot_1@xxxxxxxxx>
Date: Mon, 17 Mar 2014 15:40:04 -0700 (PDT)
Delivery-date: Mon, 17 Mar 2014 22:40:21 +0000
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List-id: Xen developer discussion <xen-devel.lists.xen.org>

Hi.

Is xentop accurate? Can it be 100% relied upon its CPU usage and other statistics?

Clearly there is a lot going on besides what the CPUs of dom_0 and dom_U see in their own realm.

Thanks, any heuristic or anecdotal information would be also of interest, if there is no gospel from the authors/care-takers of this code.

(There is some thread from 2010 http://old-list-archives.xenproject.org/archives/html/xen-devel/2010-08/msg01197.html, and some older threads that refer to accuracy issues with Xentop. I don't know if there is some truth to these threads.)

(Sorry, I have not looked at the code).

=Raj

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