Re: [Xen-devel] Crash/trace when starting oprofile

[Pablo Llopis <pllopis@xxxxxxxxxxxxxxxxx>]

I tried the patches on a vanilla 3.2.13 kernel (patches applied cleanly \o/) with success!

In case this is helps anybody in the future, the issue here was that ubuntu's 3.0.0.x kernels with xen-hypervisor 4.1.1 and oprofile 0.9.6 did not work properly. 

In addition to building a stock kernel, I had to build the hypervisor from source in order to obtain the xen-syms image corresponding to hypervisor version 4.1.1, the one you specify with --xen to oprofile. (I did this with apt-get source in order to ensure that I was obtaining the same version).

Thank you for your help,

Pablo

On Wed, Mar 28, 2012 at 10:59 PM, Pablo Llopis <pllopis@xxxxxxxxxxxxxxxxx> wrote:

Thank you, I will try Michael's patches on a vanilla 3.0 or 3.2 kernel and report back.

However, on first sight the patches enable profiling on unprivileged guests (although the author calls it passive profiling, which as far as I know is the opposite), and I am trying to do unprivileged dom0 profiling. Lets hope this helps!

On Wed, Mar 28, 2012 at 5:43 PM, Wei Liu <wei.liu2@xxxxxxxxxx> wrote:

On Wed, 2012-03-28 at 15:55 +0100, Pablo Llopis wrote:
> Hello Xen developers,
>
>
> I sent a similar message to xen-users about a week ago, did not obtain
> any response and only now realized that I should have sent this here
> instead (http://xenoprof.sourceforge.net/ says to write to this list).
> Apologies if you see this message twice.
>

There are some patches floating around on xen-devel:

http://marc.info/?l=xen-devel&m=132779518918042&w=2
http://marc.info/?l=xen-devel&m=132708552318073&w=2



Wei.

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