Your action on perf bug report is requested was Re: Basic perf PMUsupport for Haswell v11
From: Andi Kleen
Date: Wed May 01 2013 - 06:10:53 EST
> I found a similar system (not same stepping, but same model) and tested
> perf top works fine here. Also on a couple of other systems.
>
> Since I cannot reproduce I would need your help debugging it.
Ingo, I haven't heard back from you on this.
You reported an unreproducable bug. I gave you several steps to
diagnose the problem, so that we can make progress on this.
You've had several days time now to to this, but I have not
heard from you.
If you don't report back from 5/3/2013 I'll assume it was some
other mistake on your side.
As a reminder:
I assume it worked before my patches. If you don't know
please double check. Also I assume there's no general
problem between the user land perf you used and the kernel.
The only patch I could think of which may affect other systems
is the moving of the APIC ack.
So does it work if you revert
perf, x86: Move NMI clearing to end of PMI handler after ...
If that is it we could white list it for Haswell.
If that's not it I may need a bisect, assuming the problem is stable.
Thanks for your cooperation.
-Andi
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