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Re: [Xen-devel] About Xenoprof support in pvops

from [Konrad Rzeszutek Wilk]

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To:	Xiang Song <classicxsong@xxxxxxxxx>
Subject:	Re: [Xen-devel] About Xenoprof support in pvops
From:	Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Date:	Mon, 20 Sep 2010 11:16:59 -0400
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On Fri, Sep 10, 2010 at 12:13:29AM +0800, Xiang Song wrote:
> Hi, list:
> 
> I am trying to do some profile work on Xen 4.0 with pvops kernel on an AMD
> machine (equipped with *AMD* '*Istanbul*' Family 10h processors). I have
> found the dulloor's xenoprof patch for pvops kernel. But it does not contain
> supports for IBS. The only IBS support for xenoprofile posted by Wei Wang
> seems to be for 2.6.18-dom0 kernel. So is there any support for pvops kernel
> to use IBS on AMD?

Not likely. But we would welcome any patches to get it working again.

> 
> Another question is when i am using normal profiling event (such as L2_MISS)
> on my AMD machine, it seems that it does not generate interrupt when the
> performance counter overflows. Is there any problem with AMD processor or
> the xenoprofile patch?

Does it work under a baremetal kernel?

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