linux-kernel - Re: [PATCH 06/23] perf mem: Check for memory events support

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Message-ID: <20160223153442.GE15284@kernel.org>
Date:	Tue, 23 Feb 2016 12:34:42 -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>,
	Stephane Eranian <eranian@...gle.com>,
	Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 06/23] perf mem: Check for memory events support

Em Tue, Feb 23, 2016 at 04:29:57PM +0100, Jiri Olsa escreveu:
> On Tue, Feb 23, 2016 at 12:18:14PM -0300, Arnaldo Carvalho de Melo wrote:
> > Em Mon, Feb 15, 2016 at 09:34:36AM +0100, Jiri Olsa escreveu:
> > > Check if current kernel support available memory events
> > > and display the status within -e  list option:
> > > 
> > >   $ perf mem record -e list
> > >   [ok] ldlat-loads
> > >   [ok] ldlat-stores

> > Can't this be:

> >   $ perf mem record -e list
> >   ldlat-loads:  Available on this machine
> >   ldlat-stores: Available on this machine
 
> hum IMO that would be quite long list if DATALA events will
> get in, so I wanted something short and punchy ;-)
 
> how about plaing it into back as you suggested
> with just 'available'
> 
> 	$ perf mem record -e list
> 	ldlat-loads:  available
> 	ldlat-stores: available

Fair enough, this is more in line with, say, 'perf test' output, i.e.:

  $ perf foo
  something: status/result

- Arnaldo