RE: [Xen-devel] More network tests with xenoprofile this time

To:	"Andrew Theurer" <habanero@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject:	RE: [Xen-devel] More network tests with xenoprofile this time
From:	"Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>
Date:	Tue, 31 May 2005 23:48:55 +0100
Delivery-date:	Tue, 31 May 2005 22:48:10 +0000
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> I have cpu util from polling xc_domain_get_cpu_usage() for 
> both domains, which is (an exerpt from the whole run, in 3 
> second intervals):
> 
>  cpu0:        [100.4] d0-0[100.4]
>  cpu2:        [045.1] d1-0[045.1]

OK, so you're confident idle time would be reported OK if there was any.
> > Is the Ethernet NIC sharing an interrupt with the USB 
> controller per 
> > chance?
> 
> Not as far as I can tell:
> 
>            CPU0
>  11:    6764395        Phys-irq  ohci_hcd
>  24:    6037311        Phys-irq  eth0
> 260:    1688517     Dynamic-irq  vif1.0

Anyone care to suggest hy ohci_hcd is taking so many interrupts? Looks
very fishy to me. I take it you're not using a USB Ethernet NIC? :-)

What happens if you boot 'nousb' ?

> > Seeing find_domain_by_id and copy_from_user so high up the list is 
> > pretty surprising.
> 
> Yes.

Definitely worth looking in to...

Sorry for all the questions. This work is much appreciated.

Ian

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