What versions of Xen and oprofile are you running?
I'm running xen 3.1.0 and oprofile 0.9.3 (patched for xen).
Any oprofile related message in the kernel log or in the output of "xm
dmesg"
No...none. Although the cpu type is correctly recognized as a xeon in xm
dmesg.
What is on /dev/oprofile/cpu_type after you run opcontrol?
"i386/piii"
Also take a look at /var/lib/oprofile/samples/oprofiled.log for any
error message
There are a lot of CPU_SWITCH messages in during some runs in the
oprofiled.log. I saw another post with the same problem on an embedded
processor, but couldn't find any follow up to it.
Meenakshi