Messages in this thread | | | Date | Mon, 21 Nov 2011 14:01:51 -0500 | From | Vince Weaver <> | Subject | Re: [tip:perf/urgent] perf/x86: Enable raw event access to Intel offcore events |
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On Mon, 21 Nov 2011, Peter Zijlstra wrote: > On Mon, 2011-11-21 at 13:24 -0500, Vince Weaver wrote:
> > Now I'll have to find something else > > to complain about, probably the scedulability issue introduced with the > > NMI watchdog. > > But you can disable that thing, right? > > echo 0 > /proc/sys/kernel/nmi_watchdog; > > or so should do the trick.
yes, if the user running PAPI has root.
That's unfortunately not always the case, and sometimes people want to have both the NMI watchdog operating and use PAPI simultaneously.
We have a workaround, but it currently disables kernel multiplexing and a few other nice features.
Vince vweaver1@eecs.utk.edu
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