linux-kernel - Re: [RFC 0/6] perf tools: Report event parsing errors

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Date:	Wed, 22 Apr 2015 11:37:51 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	Ingo Molnar <mingo@...nel.org>, Jiri Olsa <jolsa@...nel.org>,
	lkml <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	David Ahern <dsahern@...il.com>,
	Namhyung Kim <namhyung@...nel.org>
Subject: Re: [RFC 0/6] perf tools: Report event parsing errors

Em Wed, Apr 22, 2015 at 04:08:50PM +0200, Jiri Olsa escreveu:
> On Mon, Apr 20, 2015 at 05:38:52PM -0300, Arnaldo Carvalho de Melo wrote:
> > Em Mon, Apr 20, 2015 at 10:15:39PM +0200, Jiri Olsa escreveu:
> > > On Mon, Apr 20, 2015 at 05:09:36PM -0300, Arnaldo Carvalho de Melo wrote:
> > > > Which is nice, wouldn't it be good to have it for the that as well, i.e.
> > > > for your example "ev=" would be a valid, and shorter form of "even=" or
> > > > "event=".

> > > hum, not sure I follow.. could you please explain in more details?

> > This would be considered valid:

> >     $ ./perf record -e 'cpu/even=0x1/' ls
> >     event syntax error: 'cpu/even=0x1/'
> >                              \___ unknown term
> >     valid terms: "event", "raw".

> > "even="  would be recognized as a shorter form of "event=", "evint="
> > would be invalid :-)

> hum I see.. seem to be touching the bison/flex core part, might not
> be that easy I'll think about it.. ;-)

This is just a "nice to have" feature, that would make it consistent
accross the tools, i.e. it works for long option processing, it would
work for event parsing, etc, but I guess you can leave it for when there
is a blizzard and you get stuck at home or something like that ;-)

- Arnaldo
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