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Date: Wed, 23 Apr 2014 22:16:42 +0200
From: Jiri Olsa <jolsa@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>,
        David Ahern <dsahern@gmail.com>,
        Frederic Weisbecker <fweisbec@gmail.com>,
        Ingo Molnar <mingo@kernel.org>, Namhyung Kim <namhyung@kernel.org>,
        Paul Mackerras <paulus@samba.org>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>,
        Arnaldo Carvalho de Melo <acme@ghostprotocols.net>,
        Jean Pihet <jean.pihet@linaro.org>
Subject: Re: [PATCH 0/3] perf tools: Speedup DWARF unwind
Message-ID: <20140423201642.GA1123@krava.redhat.com>
References: <1397756352-26694-1-git-send-email-jolsa@redhat.com>
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On Thu, Apr 17, 2014 at 07:39:09PM +0200, Jiri Olsa wrote:
> hi,
> trying to speedup DWARF unwind report code by factoring
> related code:
>   - caching sample's registers access
>   - keep dso data file descriptor open for the
>     life of the dso object
>   - replace dso cache code by mapping dso data file
>     directly for the life of the dso object
> 
> The speedup is mainly for libunwind unwind. The libdw will benefit
> mainly from cached registers access, because it handles dso data
> accesses by itself.. and anyway it's still faster ;-).
> 
> Also reachable in here:
>   git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git
>   perf/core_unwind_speedup

rebased to latest tip perf/core, review appreciated ;-)

jirka