Date: Thu, 31 Oct 2013 11:57:59 +0100
From: Ingo Molnar <mingo@kernel.org>
To: Mark Wielaard <mjw@redhat.com>
Cc: Pekka Enberg <penberg@iki.fi>,
        Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
        "Frank Ch. Eigler" <fche@redhat.com>,
        Pekka Enberg <penberg@kernel.org>,
        Hemant Kumar <hkshaw@linux.vnet.ibm.com>,
        LKML <linux-kernel@vger.kernel.org>,
        Srikar Dronamraju <srikar@linux.vnet.ibm.com>,
        Peter Zijlstra <peterz@infradead.org>, Oleg Nesterov <oleg@redhat.com>,
        hegdevasant@linux.vnet.ibm.com, Ingo Molnar <mingo@redhat.com>,
        anton@redhat.com, systemtap@sourceware.org,
        Namhyung Kim <namhyung@kernel.org>, aravinda@linux.vnet.ibm.com,
        dsahern@gmail.com,
        "yrl.pp-manager.tt@hitachi.com" <yrl.pp-manager.tt@hitachi.com>
Subject: Re: [PATCH v4 2/3] Support for perf to probe into SDT markers:
Message-ID: <20131031105759.GB12066@gmail.com>
References: <20131023044511.1886.82571.stgit@hemant-fedora>
 <20131023050502.1886.15779.stgit@hemant-fedora>
 <CAOJsxLFKm3TxeTmGjbpr1r4sZ8fHcM481-5BM_Cq0J8hhtvBqQ@mail.gmail.com>
 <y0mbo2cs2oa.fsf@fche.csb>
 <5270D9F7.3090105@hitachi.com>
 <5270F2DE.6040505@iki.fi>
 <1383216886.6521.5910.camel@bordewijk.wildebeest.org>
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* Mark Wielaard <mjw@redhat.com> wrote:

> On Wed, 2013-10-30 at 13:51 +0200, Pekka Enberg wrote:
> > On 10/30/13 12:05 PM, Masami Hiramatsu wrote:
> > > To find all system libraries, we can use ldconfig.
> > >
> > > $ ldconfig --print-cache
> > >
> > > shows what dynamic libraries will be loaded. On my own laptop (running
> > > ubuntu13.04) shows ~1000 libs.
> > 
> > Good point. That definitely narrows down the scanned set.
> 
> It is fast. But that would miss the various libjvm.so variants for 
> example. Or other programs, like libreoffice, which have SDT 
> probes in their internal shared libraries that aren't in the 
> default ldconfig paths.

I suppose those Java libraries ought to show up in 
/etc/prelink.cache though, right?

Thanks,

	Ingo
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