Re: [RFC PATCHv3] perf tools: add event grouping capability to "perf stat"

[Arnaldo Carvalho de Melo <acme@ghostprotocols.net>]

Em Thu, Nov 25, 2010 at 03:18:58PM +0100, Stephane Eranian escreveu:
> On Thu, Nov 25, 2010 at 3:12 PM, Peter Zijlstra <a.p.zijlstra@chello.nl> wrote:
> > perf-record already does that:
> >
> >        if (nr_counters > 1)
> >                attr->sample_type |= PERF_SAMPLE_ID;
> >
> Ok, that's good.
> The other thing I saw, is that perf report assumes that sample_type is the
> same for all events, otherwise it dies.

Right, we need to have object attributes, and then pass them to
perf_session__new, so that it creates the counters, etc, instead of
having top, record, etc doing it in ad hoc ways.

I'll try to attack this soon, after tinishing the sample_type_id_all,
that in the kernel is per attribute, but in the tooling side suffers
from the one sample_type per session, not per attribute problem too.

- Arnaldo