linux-kernel - Re: [PATCH 11/52] perf tools: Add stat config event

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Message-ID: <20151027141335.GC9405@kernel.org>
Date:	Tue, 27 Oct 2015 11:13:35 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	Jiri Olsa <jolsa@...nel.org>, lkml <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	"Liang, Kan" <kan.liang@...el.com>
Subject: Re: [PATCH 11/52] perf tools: Add stat config event

Em Tue, Oct 27, 2015 at 02:51:54PM +0100, Jiri Olsa escreveu:
> On Tue, Oct 27, 2015 at 10:44:40AM -0300, Arnaldo Carvalho de Melo wrote:
> > > I think we could easily add record specific event for this
> > > once it's needed.. there's plenty of free numbers in user
> > > events area ;-)

> > Shhh, don't ask PeterZ about it ;-)

> > But seriously, what makes this specific? Do you envision the stat code
> > needing 2^64-1 tags?

> nope ;-)

> it's just the read function perf_event__read_stat_config takes the
> 'struct perf_stat_config *' and updates it based on the event data.

> we would need to change the code to be more generic.. but as you said,
> it's future ;-)

Right, I applied the patch, I was just curious if I was missing some
detail that would prevent us from using this as a generic tag/value
perf.data storing facility.

- Arnaldo
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