Re: LBR callchains from tracepoints

[Peter Zijlstra]

On Tue, Apr 26, 2016 at 03:20:32PM -0300, Arnaldo Carvalho de Melo wrote:
> Yeah, and that already works in perf, its just that it doesn't work from some
> points (PERF_TYPE_SOFTWARE, PERF_TYPE_TRACEPOINT, etc), as described in the
> changeset I mentioned.

Look at it the other way around, it _only_ works for intel cpu events,
_nothing_ else.

There is only a single PMU that supports LBR callgraph thingies, all the
others do not.