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SubjectRe: Oprofile : need to adjust PC by 16 bytes
Andi Kleen a écrit :
>>> And no, blindly subtracting 16 from IP is not a fix.
>> Who mentioned a fix ? I am only giving more fuel to Intel guys so they
>> hopefully can give us a working oprofile.
> You would need to implement PEBS support to avoid that problem. But it's a big
> task. perfmon2 implements it already.

Thanks for the information.

Hum, so I grabbed perfmon2 git tree, installed various tools...

I am quite new to pfmon and tried :

# pfmon --system-wide
sizeof=64 44
<press ENTER to stop session>

Then started "tbench 8", and got a kernel panic after 6 seconds.

I was using oprofile like this

opcontrol --vmlinux=/path/vmlinux --start
// doing some benchmarking...
opreport -l vmlinux | head -n 40

What would be a working equivalent for perfmon2 based tools ?


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