xenoprof with 2.6.9 kernel - "timer mode" problem

["jowkju" <jowkju@postech.ac.kr>]

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Hello, xen users,

I installed XenServer-v3.2.0 on my Dell PowerEdge 6850 and compiled dom0
kernel with oprofile support enabled.

I also made a guest VM -Centos 4.5 with kernel 2.6.9 through "p2v".  And
then I newly compiled the guest VM kernel 

with "oprofile support enabled" using the following source RPM for xenoprof
test

 

kernel-2.6.9-42.0.8.EL.xs3.2.0.284.src.rpm

 

During compiling the kernel, the xen.patch file doesn't activate the
"profiling support" when X86_XEN is enabled. So I fixed it

to enable "profiling support" even though it sets X86_XEN.

 

-----

Just remove the "!" on the following code

 

>> xen.patch

arch/i386/Kconfig

 

274 +if !X86_XEN

    275  source "arch/i386/oprofile/Kconfig"

    276 +endif

 

----

 

And then I try to use oprofile on both dom0 kernel and domU kernel. But when
I start a profiling daemon on the 

domU kernel with the event "GLOBAL_POWER_EVENT", the messages said,

 

You cannot specify any performance counter events

because OProfile is in timer mode.

 

How can I get solved this problem? Is there anybody who let me know how to
enter the event counter mode 

instead of timer mode?? 

 

Thank you!!


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