linux-kernel - RE: [PATCH V3 3/5] perf,tools: Dump per-sample freq/CPU%/CORE

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Message-ID: <37D7C6CF3E00A74B8858931C1DB2F077018D186D@SHSMSX103.ccr.corp.intel.com>
Date:	Tue, 4 Aug 2015 17:07:40 +0000
From:	"Liang, Kan" <kan.liang@...el.com>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Jiri Olsa <jolsa@...hat.com>
CC:	"a.p.zijlstra@...llo.nl" <a.p.zijlstra@...llo.nl>,
	"luto@...nel.org" <luto@...nel.org>,
	"mingo@...hat.com" <mingo@...hat.com>,
	"eranian@...gle.com" <eranian@...gle.com>,
	"ak@...ux.intel.com" <ak@...ux.intel.com>,
	"mark.rutland@....com" <mark.rutland@....com>,
	"Hunter, Adrian" <adrian.hunter@...el.com>,
	"jolsa@...nel.org" <jolsa@...nel.org>,
	"namhyung@...nel.org" <namhyung@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH V3 3/5] perf,tools: Dump per-sample freq/CPU%/CORE_BUSY%
 in report -D



> Em Wed, Jul 29, 2015 at 12:43:22PM -0300, Arnaldo Carvalho de Melo
> escreveu:
> > Em Wed, Jul 29, 2015 at 02:53:29PM +0200, Jiri Olsa escreveu:
> > > >  	switch (event->header.type) {
> > > >  	case PERF_RECORD_SAMPLE:
> > > > -		dump_sample(evsel, event, sample);
> > > >  		if (evsel == NULL) {
> > > >  			++evlist->stats.nr_unknown_id;
> > > >  			return 0;
> > > >  		}
> > > > +		dump_sample(session, evlist, evsel, event, sample);
> > >
> > > same here, you could pass only session all the way through
> >
> > I'll take a look at how interesting it would be to have a
> > evsel->evlist, that if NULL means the evsel is freestanding, but when
> > it is linked to an evlist, then it will be there. This way we wouldn't
> > have to pass (evlist, evsel) when the main purpose of a function is
> > about an evsel but we need information that is logically associated to
> > all evsels in a list, i.e. that is in evsel->evlist.
> 
> There are no cases where a function receives (evsel, evlist) with that evlist
> containing that evsel :-\
> 
> Perhaps this will be the first, i.e. rename perf_session_env to perf_env,
> then store it in evlist->env, then when processing something where we
> have a evsel or evlist we can access that env from:
> 
>     evsel->evlist->env;
> 
> Will continue after lunch, trying to prototype what I just described.
>
Hi Arnaldo,

Have you got a chance to implement the prototype for evlist->env?

Thanks,
Kan

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