PMU in xen enviroment

PMU in xen enviroment

[蒋雄伟(蒋冲)]

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Hi，everyone


We would like to obtain the distribution of CPU-specific hardware events
such as clock cycles and cache and TLB misses and branch-miss and etc. in
Xen environment . It is said that Xenoprof can be used to do so. We use
Intel's Ivy Bridge Processor which is released in 2012, so I think it is
better to use oprofile 0.9.8 or above. But http://xenoprof.sourceforge.net/
only released oprofile-0.9.5-xen.patch which is released in 2009. Does it
mean no patch is needed since OProfile 0.9.6 ? is there a detailed document
describing how to use oprofile in xen environment ? is there any other tools
to do so ?


Thanks a lot. 


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Re: PMU in xen enviroment

[William Cohen]

On 04/13/2015 12:21 AM, 蒋雄伟(蒋冲) wrote:
> 
>   Hi，everyone
> 
> 
>   We would like to obtain the distribution of CPU-specific hardware events such as clock cycles and cache and TLB misses and branch-miss and etc. in Xen environment . It is said that Xenoprof can be used to do so. We use Intel's Ivy Bridge Processor which is released in 2012, so I think it is better to use oprofile 0.9.8 or above. But http://xenoprof.sourceforge.net/ only released oprofile-0.9.5-xen.patch which is released in 2009. Does it mean no patch is needed since OProfile 0.9.6 ? is there a detailed document describing how to use oprofile in xen environment ? is there any other tools to do so ?
> 
> 
>   Thanks a lot.


Hi,

There is a version of oprofile-0.9.9 for recent versions of fedora that include the xen patch:

http://koji.fedoraproject.org/koji/buildinfo?buildID=606050

That might be a reasonable starting point.  However I don't think that the patch has been tested as most people are using KVM based virtualization on fedora.

IIRC is it somewhat complex to get everything setup and running for xenoprof because both host and guest need to be setup to do the monitoring:

http://www-archive.xenproject.org/files/summit_3/xenoprof_tutorial.pdf

-Will

> 
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Re: PMU in xen enviroment

[Konrad Rzeszutek Wilk]

On Mon, Apr 13, 2015 at 12:21:42PM +0800, 蒋雄伟(蒋冲) wrote:
> 
> Hi，everyone
> 
> 
> We would like to obtain the distribution of CPU-specific hardware events
> such as clock cycles and cache and TLB misses and branch-miss and etc. in
> Xen environment . It is said that Xenoprof can be used to do so. We use
> Intel's Ivy Bridge Processor which is released in 2012, so I think it is
> better to use oprofile 0.9.8 or above. But http://xenoprof.sourceforge.net/
> only released oprofile-0.9.5-xen.patch which is released in 2009. Does it
> mean no patch is needed since OProfile 0.9.6 ? is there a detailed document
> describing how to use oprofile in xen environment ? is there any other tools
> to do so ?

Boris (CCed) is working on making perf work under Linux + Xen.

Boris, would it make sense to have an Linux git tree with the set of patches
that use the Xen new hypercalls ?

> 
> 
> Thanks a lot. 
> 

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> Xen-devel mailing list
> Xen-devel@lists.xen.org
> http://lists.xen.org/xen-devel


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Re: PMU in xen enviroment

[Boris Ostrovsky]

On 04/15/2015 10:09 AM, Konrad Rzeszutek Wilk wrote:
> On Mon, Apr 13, 2015 at 12:21:42PM +0800, 蒋雄伟(蒋冲) wrote:
>> Hi，everyone
>>
>>
>> We would like to obtain the distribution of CPU-specific hardware events
>> such as clock cycles and cache and TLB misses and branch-miss and etc. in
>> Xen environment . It is said that Xenoprof can be used to do so. We use
>> Intel's Ivy Bridge Processor which is released in 2012, so I think it is
>> better to use oprofile 0.9.8 or above. But http://xenoprof.sourceforge.net/
>> only released oprofile-0.9.5-xen.patch which is released in 2009. Does it
>> mean no patch is needed since OProfile 0.9.6 ? is there a detailed document
>> describing how to use oprofile in xen environment ? is there any other tools
>> to do so ?
> Boris (CCed) is working on making perf work under Linux + Xen.
>
> Boris, would it make sense to have an Linux git tree with the set of patches
> that use the Xen new hypercalls ?

Yes, I probably should do this.

-boris

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