Messages in this thread | | | Date | Mon, 3 Mar 2014 10:05:31 -0500 | From | Don Zickus <> | Subject | Re: [PATCH 08/19] perf c2c: Shared data analyser |
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On Fri, Feb 28, 2014 at 01:03:31PM -0800, Davidlohr Bueso wrote: > On Fri, 2014-02-28 at 14:46 -0500, Don Zickus wrote: > > On Fri, Feb 28, 2014 at 11:08:59AM -0800, Andi Kleen wrote: > > > Don Zickus <dzickus@redhat.com> writes: > > > > + > > > > +static const struct perf_evsel_str_handler handlers[] = { > > > > + { "cpu/mem-loads,ldlat=30/pp", perf_c2c__process_load, }, > > > > + { "cpu/mem-stores/pp", perf_c2c__process_store, }, > > > > > Hmm I'm getting this when running a simple record command. > > invalid or unsupported event: 'cpu/mem-loads/pp' > > This only occurs with c2c, other subcommands work normally. It's as if > it were an old kernel, but it's Linus' latest. Is this an issue with the > patch or something I'm missing? > > Furthermore, I see: > ls /sys/bus/event_source/devices/cpu/events > branch-instructions branch-misses cache-misses cache-references cpu-cycles instructions mem-loads
Hmm, so based on Andi's reply, I am assuming you are running on a Westmere (or Nehalem) due to the lack of mem-stores.
If you don't have mem-stores, this tool isn't going to work. The tool can only detect contention when sampling reads _and_ writes to the same addresses.
Cheers, Don
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