Re: [PATCH -v3] perf, x86: try to handle unknown nmis with runningperfctrs

[Don Zickus]

On Fri, Aug 20, 2010 at 04:17:03PM +0200, Ingo Molnar wrote:
> 
> it's not working so well, i'm getting:
> 
>  Uhhuh. NMI received for unknown reason 00 on CPU 9.
>  Do you have a strange power saving mode enabled?
>  Dazed and confused, but trying to continue
> 
> on a nehalem box, after a perf top and perf stat run.

After applying the patch below, I ran the following commands on my nehalem
box without reproducing what you are seeing.  Any thing else I can run
that might trigger it? (I also ran them on an amd phenom quad-core box).

I used 2.6.32-rc2 plus Robert's and 2 of PeterZ's patches.

perf top
perf stat -a -e cycles -e instructions -e cache-references -e cache-misses -e branch-misses -- sleep 5
perf record -f -a -e cycles -e instructions -e cache-references -e cache-misses -e branch-misses -- sleep 5

Cheers,
Don