From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754475AbaEORXy (ORCPT ); Thu, 15 May 2014 13:23:54 -0400 Received: from mx1.redhat.com ([209.132.183.28]:33594 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752514AbaEORXv (ORCPT ); Thu, 15 May 2014 13:23:51 -0400 From: Jiri Olsa To: linux-kernel@vger.kernel.org Cc: Arnaldo Carvalho de Melo , Corey Ashford , David Ahern , Frederic Weisbecker , Ingo Molnar , Jean Pihet , Namhyung Kim , Paul Mackerras , Peter Zijlstra , Jiri Olsa Subject: [PATCHv2 00/14] perf tools: Speedup DWARF unwind Date: Thu, 15 May 2014 19:23:21 +0200 Message-Id: <1400174615-2121-1-git-send-email-jolsa@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 ;-). v2 changes: - adding limit for open dso objects with sort of LRU mechanism to pick up and close dso objects if we are over the limit - file mmaping changes are omitted, because I couldn't prove the improvement exactly, will resubmit later - added dso close logic in case of no memory - added tests On 10GB perf data file with dwarf unwind data I've got around 30% speed up. Also reachable in here: git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git perf/core_unwind_speedup thanks, jirka Cc: Arnaldo Carvalho de Melo Cc: Corey Ashford Cc: David Ahern Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Jean Pihet Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Signed-off-by: Jiri Olsa --- Jiri Olsa (14): 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 interface for dso data fd limit perf tests: Add test for caching dso file descriptors perf tests: Add test for closing dso objects on EMFILE error tools/perf/tests/builtin-test.c | 42 ++++++++++++++- tools/perf/tests/dso-data.c | 256 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-- tools/perf/tests/tests.h | 2 + tools/perf/util/dso.c | 274 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++--------- tools/perf/util/dso.h | 56 +++++++++++++++++++- tools/perf/util/event.h | 5 ++ tools/perf/util/perf_regs.c | 10 +++- tools/perf/util/perf_regs.h | 4 +- tools/perf/util/unwind-libunwind.c | 4 +- 9 files changed, 617 insertions(+), 36 deletions(-)