linux-kernel - Re: [PATCH] perf/powerpc: Cache the DWARF debug info

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Message-ID: <20141023153322.GH14687@kernel.org>
Date:	Thu, 23 Oct 2014 12:33:22 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>,
	Anton Blanchard <anton@....ibm.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf/powerpc: Cache the DWARF debug info

Em Thu, Oct 23, 2014 at 05:13:06PM +0200, Jiri Olsa escreveu:
> On Thu, Oct 23, 2014 at 11:26:34AM -0300, Arnaldo Carvalho de Melo wrote:
> > That is why I thought it would be a compromise to put what he did, it
> > would not make the existing situation that much worse, work needs to be
> > done in this area :-\
 
> I think we just need to put that libdw handle into dso object
> as I suggested above

Isn't it there already?

The patch does:

+++ b/tools/perf/util/dso.h
@@ -127,6 +127,7 @@ struct dso {
        const char       *long_name;
        u16              long_name_len;
        u16              short_name_len;
+       void            *dwfl;                  /* DWARF debug info */


----------

What you want, on top of that, at a minimum, we somehow limit the number
of simultaneously dwfl_begin()'ed DSOs, right?

- Arnaldo
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