From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752859AbcAGANc (ORCPT ); Wed, 6 Jan 2016 19:13:32 -0500 Received: from LGEAMRELO13.lge.com ([156.147.23.53]:34018 "EHLO lgeamrelo13.lge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752388AbcAGAMc (ORCPT ); Wed, 6 Jan 2016 19:12:32 -0500 X-Original-SENDERIP: 156.147.1.125 X-Original-MAILFROM: namhyung@kernel.org X-Original-SENDERIP: 10.177.227.17 X-Original-MAILFROM: namhyung@kernel.org From: Namhyung Kim To: Arnaldo Carvalho de Melo Cc: Ingo Molnar , Peter Zijlstra , Jiri Olsa , LKML , David Ahern , Steven Rostedt , Frederic Weisbecker , Andi Kleen , Wang Nan Subject: [PATCH v4 3/5] perf tools: Fix dynamic sort keys to sort properly Date: Thu, 7 Jan 2016 09:12:27 +0900 Message-Id: <1452125549-1511-3-git-send-email-namhyung@kernel.org> X-Mailer: git-send-email 2.6.4 In-Reply-To: <1452125549-1511-1-git-send-email-namhyung@kernel.org> References: <1452125549-1511-1-git-send-email-namhyung@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Currently, the dynamic sort keys compares trace data using memcmp(). But for output sorting, it should check data size and compare by word. Also it sorted strings in reverse order, fix it. Before) $ perf report -F overhead -s prev_pid,next_pid ... # Overhead prev_pid next_pid # ........ .......... .......... # 0.39% 490 0 9.12% 225 0 0.04% 224 0 0.51% 731 189 0.08% 731 3 0.12% 731 0 4.82% 729 0 0.08% 1229 0 0.20% 715 0 4.78% 189 225 ... After) $ perf report -F overhead -s prev_pid,next_pid ... # Overhead prev_pid next_pid # ........ .......... .......... # 0.43% 0 7 0.04% 0 11 0.04% 0 12 0.08% 0 14 0.04% 0 17 0.08% 0 19 0.04% 0 22 0.04% 0 27 0.04% 0 37 0.04% 0 42 ... Reported-by: Arnaldo Carvalho de Melo Signed-off-by: Namhyung Kim --- tools/perf/util/sort.c | 23 ++++++++++++++++++++++- 1 file changed, 22 insertions(+), 1 deletion(-) diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c index e8a5cdee3f0d..4d05b13aeac8 100644 --- a/tools/perf/util/sort.c +++ b/tools/perf/util/sort.c @@ -1804,6 +1804,9 @@ static int64_t __sort__hde_sort(struct perf_hpp_fmt *fmt, struct hpp_dynamic_entry *hde; struct format_field *field; unsigned offset, size; + int64_t *a64, *b64; + int32_t *a32, *b32; + int16_t *a16, *b16; hde = container_of(fmt, struct hpp_dynamic_entry, hpp); @@ -1819,7 +1822,25 @@ static int64_t __sort__hde_sort(struct perf_hpp_fmt *fmt, size = field->size; } - return memcmp(b->raw_data + offset, a->raw_data + offset, size); + if (field->flags & FIELD_IS_STRING) + return strcmp(b->raw_data + offset, a->raw_data + offset); + + switch (size) { + case 8: + a64 = a->raw_data + offset; + b64 = b->raw_data + offset; + return *b64 - *a64; + case 4: + a32 = a->raw_data + offset; + b32 = b->raw_data + offset; + return *b32 - *a32; + case 2: + a16 = a->raw_data + offset; + b16 = b->raw_data + offset; + return *b16 - *a16; + default: + return memcmp(b->raw_data + offset, a->raw_data + offset, size); + } } bool perf_hpp__is_dynamic_entry(struct perf_hpp_fmt *fmt) -- 2.6.4