From: Rob Gardner <rob.gardner@hp.com>
To: "Dave Thompson (davetho)" <davetho@cisco.com>
Cc: xen-devel@lists.xensource.com
Subject: Re: CPU Utilization
Date: Mon, 12 Dec 2005 14:10:53 -0700 [thread overview]
Message-ID: <439DE75D.7080109@hp.com> (raw)
In-Reply-To: <5440A5A36B8CED4B9F54524343CB6B68FD133F@xmb-rtp-215.amer.cisco.com>
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Dave Thompson (davetho) wrote:
>
>Doesn't top's CPU summary line show both? I thought us=user space,
>sy=system, ni=nice, id=idle, hi=hwintr, si=softintr. So in my
>example 1% in user space, 7.3% in system level, 3.3% in h/w intr,
>and 15% in soft intr. Total of 26.6% utilized of which 25.6% is
>in kernel.
>
>
>
I think that 'top' shows system time spent on behalf of user processes.
Dom0 has stuff going on in the kernel that has nothing to do with user
processes. For instance, when you generate lan traffic to/from another
domain, it causes the dom0 kernel to use a bunch of cpu time, and this
may not show up using 'top'. That's my guess about what is happening.
Rob
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next prev parent reply other threads:[~2005-12-12 21:10 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-12-12 19:41 CPU Utilization Dave Thompson (davetho)
2005-12-12 21:10 ` Rob Gardner [this message]
2005-12-12 23:01 ` Anthony Liguori
2005-12-13 13:41 ` Rik van Riel
-- strict thread matches above, loose matches on Subject: below --
2020-07-24 17:05 CPU utilization Vijay Khemka
2005-12-13 14:15 CPU Utilization Dave Thompson (davetho)
2005-12-13 15:35 ` Andrew Theurer
2005-12-12 23:19 Dave Thompson (davetho)
2005-12-13 3:23 ` Andrew Theurer
2005-12-12 19:07 Dave Thompson (davetho)
2005-12-12 19:23 ` Rob Gardner
2005-10-04 23:59 Preethi M
2005-10-06 16:22 ` Rob Gardner
2005-05-01 13:51 CPU utilization Brian Hays
2005-05-01 17:14 ` Keir Fraser
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