Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753506AbaFLUz5 (ORCPT ); Thu, 12 Jun 2014 16:55:57 -0400 Received: from mail-vc0-f172.google.com ([209.85.220.172]:42859 "EHLO mail-vc0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752080AbaFLUz4 (ORCPT ); Thu, 12 Jun 2014 16:55:56 -0400 MIME-Version: 1.0 In-Reply-To: <1402587045-5461-1-git-send-email-jolsa@kernel.org> References: <1402587045-5461-1-git-send-email-jolsa@kernel.org> Date: Thu, 12 Jun 2014 22:55:55 +0200 Message-ID: Subject: Re: [GIT PULL 00/14] perf/core improvements and fixes From: Jean Pihet To: Jiri Olsa Cc: Ingo Molnar , "linux-kernel@vger.kernel.org" , Andi Kleen , Arnaldo Carvalho de Melo , Corey Ashford , David Ahern , Frederic Weisbecker , Namhyung Kim , Paul Mackerras , Peter Zijlstra Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Jiri, On 12 June 2014 17:30, Jiri Olsa wrote: > hi Ingo, > please consider pulling > > thanks, > jirka > > The following changes since commit 7184062b94b4bfac08715fb786fd2df399c5d6ee: > > Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core (2014-06-12 13:54:42 +0200) > > are available in the git repository at: > > > git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git tags/perf-core-for-mingo > > for you to fetch changes up to 45dc1bb5c1d47f9519e2101f6b073bb4bb1d1f99: > > perf tests: Add test for closing dso objects on EMFILE error (2014-06-12 16:53:23 +0200) > > ---------------------------------------------------------------- > perf/core improvements and fixes: > > . Honor user freq/interval properly in record command (Namhyung Kim) > > . Speedup DWARF unwind (Jiri Olsa) Here are the results of the performance assessment on ARMv7, FWIW: The results for unwind_speedup (v4) on ARMv7 are: - libunwind: between -17% in execution time for light load (i.e. using not-so-deep backtraces from the stress app.) and -25% for deep backtrace (the stress_bt app.), - libdw: no significant improvement (0-3% improvement). The results for unwind_speedup (v3) on ARMv7 are: - 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). Note: v3 is faster than v4 by 13-25%, with and without the speed-up patches. The real cause has been investigated, yet. Cf. https://wiki.linaro.org/LEG/Engineering/TOOLS/perf-callstack-unwinding#Speed_improvement for the details. Regards, Jean > > Signed-off-by: Jiri Olsa > > ---------------------------------------------------------------- > Jiri Olsa (13): > perf tools: Cache register accesses for unwind processing > perf tools: Separate dso data related variables > perf tools: Add data_fd into dso object > perf tools: Add global list of opened dso objects > perf tools: Add global count of opened dso objects > perf tools: Cache dso data file descriptor > perf tools: Add file size check and factor dso__data_read_offset > perf tools: Allow to close dso fd in case of open failure > perf tools: Add dso__data_* interface descriptons > perf tests: Spawn child for each test > perf tests: Allow reuse of test_file function > perf tests: Add test for caching dso file descriptors > perf tests: Add test for closing dso objects on EMFILE error > > Namhyung Kim (1): > perf record: Fix to honor user freq/interval properly > > tools/perf/tests/builtin-test.c | 42 +++++- > tools/perf/tests/dso-data.c | 214 +++++++++++++++++++++++++++- > tools/perf/tests/tests.h | 2 + > tools/perf/util/dso.c | 279 +++++++++++++++++++++++++++++++++---- > tools/perf/util/dso.h | 50 ++++++- > tools/perf/util/event.h | 5 + > tools/perf/util/evsel.c | 4 +- > tools/perf/util/perf_regs.c | 10 +- > tools/perf/util/perf_regs.h | 4 +- > tools/perf/util/unwind-libunwind.c | 2 - > 10 files changed, 574 insertions(+), 38 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/