[Xen-devel] xenoprofile and multiplexing of events (AMD patch)

[Muhammad Atif <m_atif_s@xxxxxxxxx>]

Hi developers! especially xenoprofile gurus

Jason Yeh of AMD has just released a patch for multiplexing hardware events in oprofile for AMDs.  Has anybody looked into that with Xen's perspective? Is it trivial to be hooked on to our xen kernels?
Second question, is there any way we can get access of hardware performance counters even in a very raw form i.e. only available to dom0 (even if it is still a specialized domu).
Best Regards,
Muhammad Atif

----- Original Message ----
From: Muhammad Atif <m_atif_s@xxxxxxxxx>
To: Viren Kumar <virenk@xxxxxxx>; xen-devel@xxxxxxxxxxxxxxxxxxx
Sent: Thursday, June 12, 2008 11:34:52 PM
Subject: Re: [Xen-devel] Status of hardware performance counters in Xen

AFAIK nope.
I am also looking for a nice way to get hold of performance counters in Xen, but seems like its not making on to top of priority queue, perhaps one of us should try it or we can collaborate. :)
So, still the way to go is oprofile (xenoprofile).

 

Best Regards,
Muhammad Atif

----- Original Message ----
From: Viren Kumar <virenk@xxxxxxx>
To: xen-devel@xxxxxxxxxxxxxxxxxxx
Sent: Wednesday, June 11, 2008 9:41:42 AM
Subject: [Xen-devel] Status of hardware performance counters in Xen

Hello everyone,

I'm wondering what the current status of hardware performance counter
usability in Xen is. I see some old posts describing the diffculties of
virtualizing hardware counters within dom0 and the domUs, but not much else.

Have they been implemented or are they in the process of being implemented? Or
are there no future plans for implementation? Any help would be appreciated.

My platform would be Xen with Solaris x86 as the dom0 (xVM) and Solaris or
Linux as the domUs.

Thanks,
Viren


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