linux-kernel - Re: libperf interface stability

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Message-ID: <20111125104535.GN15738@erda.amd.com>
Date:	Fri, 25 Nov 2011 11:45:35 +0100
From:	Robert Richter <robert.richter@....com>
To:	Arnaldo Carvalho de Melo <acme@...hat.com>
CC:	<mingo@...hat.com>, <eranian@...gle.com>,
	<linux-kernel@...r.kernel.org>, <fweisbec@...il.com>,
	<efault@....de>, <peterz@...radead.org>
Subject: Re: libperf interface stability

On 24.11.11 16:10:52, Arnaldo Carvalho de Melo wrote:
> Em Thu, Nov 24, 2011 at 05:28:45PM +0100, Robert Richter escreveu:
> > It would be good to have a well defined, stable libperf interface for
> > tools other than perf.
> 
> Agreed, an effort in this direction was the perf python binding, that so
> far includes only:
> 
> tools/perf/util/setup.py
> 
> 	sources = ['util/python.c', 'util/ctype.c', 'util/evlist.c',
> 		   'util/evsel.c', 'util/cpumap.c', 'util/thread_map.c',
> 		   'util/util.c', 'util/xyarray.c', 'util/cgroup.c',
> 		   'util/debugfs.c'],
> 
> You need https://github.com/acmel/linux/commits/perf/urgent to build it
> tho, it has a fix for that:
> 
> In the end it generates a ~/build/perf/python/perf.so file (I use make
> -C tools/perf O=/home/acme/build/perf) that has all that is needed for
> simple tools like tools/perf/python/twatch.py.
> 
> I think of it as a precursor for a shared library for use with C and I
> have been working on untangling references such as the symbol_conf one
> you mentioned and making the 'perf_evlist' and 'perf_evsel' classes the
> main way to work with libperf.

Thanks Arnaldo, will then take this as a base to start with.

-Robert

-- 
Advanced Micro Devices, Inc.
Operating System Research Center

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