linux-kernel - Re: [PATCH] perf tools: Delay loading symtabs till we hit a map with it

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Message-ID: <20091029072433.GF12874@elte.hu>
Date:	Thu, 29 Oct 2009 08:24:33 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Arnaldo Carvalho de Melo <acme@...radead.org>
Cc:	linux-kernel@...r.kernel.org,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Paul Mackerras <paulus@...ba.org>,
	Mike Galbraith <efault@....de>
Subject: Re: [PATCH] perf tools: Delay loading symtabs till we hit a map
	with it

* Arnaldo Carvalho de Melo <acme@...radead.org> wrote:

> From: Arnaldo Carvalho de Melo <acme@...hat.com>
> 
> So that we can have a quicker start on perf top and even speedups in the
> other tools, as we can have maps with no hits, so no need to load its
> symtabs.
> 
> Cc: Frederic Weisbecker <fweisbec@...il.com>
> Cc: Peter Zijlstra <peterz@...radead.org>
> Cc: Paul Mackerras <paulus@...ba.org>
> Cc: Mike Galbraith <efault@....de>
> Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
> ---
>  tools/perf/builtin-annotate.c |    4 ++--
>  tools/perf/builtin-report.c   |    4 ++--
>  tools/perf/builtin-top.c      |    5 ++---
>  tools/perf/util/event.h       |    4 +++-
>  tools/perf/util/map.c         |   40 ++++++++++++++++++++++++----------------
>  tools/perf/util/symbol.c      |   16 +++++++++-------
>  tools/perf/util/symbol.h      |    4 ++--
>  7 files changed, 44 insertions(+), 33 deletions(-)

ok, that's a really nice feature - i noticed the occasional symtab 
loading overhead in tools.

	Ingo
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