From: Jiri Olsa <jolsa@redhat.com>
To: Jean Pihet <jean.pihet@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
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>
Subject: Re: [PATCHv2 00/14] perf tools: Speedup DWARF unwind
Date: Mon, 26 May 2014 19:36:46 +0200 [thread overview]
Message-ID: <20140526173646.GC2763@krava.brq.redhat.com> (raw)
In-Reply-To: <CAFrcx1k+dk2sjB4boHQtDSzTdutJ1pxMDnGTsFwh_2_gTgYa2g@mail.gmail.com>
On Fri, May 23, 2014 at 03:26:27PM +0200, Jean Pihet wrote:
> Jiri,
>
>
> On 23 May 2014 10:13, Jiri Olsa <jolsa@redhat.com> wrote:
> > ping ;-)
> This looks a ping to yourself ;-)
:-)
>
> Here are the results on ARMv7:
> - libunwind: between -29% in execution time for light load (i.e. using
> not-so-deep backtraces from the stress app.) and -49% for deep
> backtrace (the 'stress_bt' app.),
> - libdw: no significant improvement (0-2% improvement).
nice, thanks for testing!
>
> Cf. https://wiki.linaro.org/LEG/Engineering/TOOLS/perf-callstack-unwinding#Speed_improvement
> for more details.
>
> FWIW:
> Acked-by: Jean Pihet <jean.pihet@linaro.org>
thanks,
jirka
prev parent reply other threads:[~2014-05-26 17:37 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-15 17:23 Jiri Olsa
2014-05-15 17:23 ` [PATCH 01/14] perf tools: Cache register accesses for unwind processing Jiri Olsa
2014-05-15 17:23 ` [PATCH 02/14] perf tools: Separate dso data related variables Jiri Olsa
2014-05-15 17:23 ` [PATCH 03/14] perf tools: Add data_fd into dso object Jiri Olsa
2014-05-15 17:23 ` [PATCH 04/14] perf tools: Add global list of opened dso objects Jiri Olsa
2014-05-15 17:23 ` [PATCH 05/14] perf tools: Add global count " Jiri Olsa
2014-05-15 17:23 ` [PATCH 06/14] perf tools: Cache dso data file descriptor Jiri Olsa
2014-05-27 1:05 ` Namhyung Kim
2014-05-27 7:37 ` Jiri Olsa
2014-05-29 0:02 ` Namhyung Kim
2014-05-29 9:01 ` Jiri Olsa
2014-05-15 17:23 ` [PATCH 07/14] perf tools: Add file size check and factor dso__data_read_offset Jiri Olsa
2014-05-15 17:23 ` [PATCH 08/14] perf tools: Allow to close dso fd in case of open failure Jiri Olsa
2014-05-15 17:23 ` [PATCH 09/14] perf tools: Add dso__data_* interface descriptons Jiri Olsa
2014-05-27 1:06 ` Namhyung Kim
2014-05-27 7:38 ` Jiri Olsa
2014-05-15 17:23 ` [PATCH 10/14] perf tests: Spawn child for each test Jiri Olsa
2014-05-27 1:08 ` Namhyung Kim
2014-05-27 7:39 ` Jiri Olsa
2014-05-15 17:23 ` [PATCH 11/14] perf tests: Allow reuse of test_file function Jiri Olsa
2014-05-15 17:23 ` [PATCH 12/14] perf tests: Add test interface for dso data fd limit Jiri Olsa
2014-05-27 1:10 ` Namhyung Kim
2014-05-27 7:51 ` Jiri Olsa
2014-05-15 17:23 ` [PATCH 13/14] perf tests: Add test for caching dso file descriptors Jiri Olsa
2014-05-27 1:36 ` Namhyung Kim
2014-05-27 7:54 ` Jiri Olsa
2014-05-29 0:06 ` Namhyung Kim
2014-05-29 8:37 ` Jiri Olsa
2014-05-30 2:11 ` Namhyung Kim
2014-05-30 8:42 ` Jiri Olsa
2014-05-15 17:23 ` [PATCH 14/14] perf tests: Add test for closing dso objects on EMFILE error Jiri Olsa
2014-05-27 1:43 ` Namhyung Kim
2014-05-27 7:59 ` Jiri Olsa
2014-05-23 8:13 ` [PATCHv2 00/14] perf tools: Speedup DWARF unwind Jiri Olsa
2014-05-23 13:26 ` Jean Pihet
2014-05-26 17:36 ` Jiri Olsa [this message]
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