linux-kernel - Re: [PATCH 5/5] perf buildid-list: New plumbing command

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Date:	Mon, 16 Nov 2009 19:58:52 +0100
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc:	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Mike Galbraith <efault@....de>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH 5/5] perf buildid-list: New plumbing command

On Mon, Nov 16, 2009 at 04:32:45PM -0200, Arnaldo Carvalho de Melo wrote:
> From: Arnaldo Carvalho de Melo <acme@...hat.com>
> 
> With this we can list the buildids in a perf.data file so that we can
> pipe them to other, distro specific tools that from the buildids can
> figure out separate packages (foo-debuginfo) where we can find the
> matching symtabs so that perf report can do its job.
> 
> E.g:
> 
> [acme@...pio linux-2.6-tip]$ perf buildid-list | head -5
> 8e08b117e5458ad3f85da16d42d0fc5cd21c5869
> 520c2387a587cc5acfcf881e27dba1caaeab4b1f
> ec8dd400904ddfcac8b1c343263a790f977159dc
> 7caedbca5a6d8ab39a7fe44bd28c07d3e14a3f3f
> 379bb828fd08859dbea73279f04abefabc95a6a3
> [acme@...pio linux-2.6-tip]$ perf buildid-list -v | head -5
> 8e08b117e5458ad3f85da16d42d0fc5cd21c5869 /sbin/init
> 520c2387a587cc5acfcf881e27dba1caaeab4b1f /lib64/ld-2.10.1.so
> ec8dd400904ddfcac8b1c343263a790f977159dc /lib64/libc-2.10.1.so
> 7caedbca5a6d8ab39a7fe44bd28c07d3e14a3f3f /sbin/udevd
> 379bb828fd08859dbea73279f04abefabc95a6a3 /lib64/libdl-2.10.1.so


I would rather see the effect of this -v option as the default.
It's very useful to see the dso resolved but hashes alone
don't pay much.

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