From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753200AbbDBW3q (ORCPT ); Thu, 2 Apr 2015 18:29:46 -0400 Received: from mail.kernel.org ([198.145.29.136]:33635 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753071AbbDBW3m (ORCPT ); Thu, 2 Apr 2015 18:29:42 -0400 From: Arnaldo Carvalho de Melo To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, Yunlong Song , Paul Mackerras , Peter Zijlstra , Wang Nan , Arnaldo Carvalho de Melo Subject: [PATCH 08/15] perf kmem: Support using -f to override perf.data file ownership Date: Thu, 2 Apr 2015 19:28:59 -0300 Message-Id: <1428013746-2037-9-git-send-email-acme@kernel.org> X-Mailer: git-send-email 1.9.3 In-Reply-To: <1428013746-2037-1-git-send-email-acme@kernel.org> References: <1428013746-2037-1-git-send-email-acme@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Yunlong Song Enable perf kmem to use perf.data when it is not owned by current user or root. Example: # perf kmem record ls # chown Yunlong.Song:Yunlong.Song perf.data # ls -al perf.data -rw------- 1 Yunlong.Song Yunlong.Song 5315665 Apr 2 10:54 perf.data # id uid=0(root) gid=0(root) groups=0(root),64(pkcs11) Before this patch: # perf kmem stat File perf.data not owned by current user or root (use -f to override) # perf kmem stat -f Error: unknown switch `f' usage: perf kmem [] {record|stat} -i, --input input file name -v, --verbose be more verbose (show symbol address, etc) --caller show per-callsite statistics --alloc show per-allocation statistics -s, --sort sort by keys: ptr, call_site, bytes, hit, pingpong, frag -l, --line show n lines --raw-ip show raw ip instead of symbol As shown above, the -f option does not work at all. After this patch: # perf kmem stat File perf.data not owned by current user or root (use -f to override) # perf kmem stat -f SUMMARY ======= Total bytes requested: 437599 Total bytes allocated: 615472 Total bytes wasted on internal fragmentation: 177873 Internal fragmentation: 28.900259% Cross CPU allocations: 6/1192 As shown above, the -f option really works now. Signed-off-by: Yunlong Song Tested-by: Arnaldo Carvalho de Melo Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Wang Nan Link: http://lkml.kernel.org/r/1427982439-27388-4-git-send-email-yunlong.song@huawei.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-kmem.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/tools/perf/builtin-kmem.c b/tools/perf/builtin-kmem.c index 64d3623d45a0..ac303ef9f2f0 100644 --- a/tools/perf/builtin-kmem.c +++ b/tools/perf/builtin-kmem.c @@ -662,6 +662,10 @@ static int __cmd_record(int argc, const char **argv) int cmd_kmem(int argc, const char **argv, const char *prefix __maybe_unused) { const char * const default_sort_order = "frag,hit,bytes"; + struct perf_data_file file = { + .path = input_name, + .mode = PERF_DATA_MODE_READ, + }; const struct option kmem_options[] = { OPT_STRING('i', "input", &input_name, "file", "input file name"), OPT_INCR('v', "verbose", &verbose, @@ -675,6 +679,7 @@ int cmd_kmem(int argc, const char **argv, const char *prefix __maybe_unused) parse_sort_opt), OPT_CALLBACK('l', "line", NULL, "num", "show n lines", parse_line_opt), OPT_BOOLEAN(0, "raw-ip", &raw_ip, "show raw ip instead of symbol"), + OPT_BOOLEAN('f', "force", &file.force, "don't complain, do it"), OPT_END() }; const char *const kmem_subcommands[] = { "record", "stat", NULL }; @@ -683,10 +688,6 @@ int cmd_kmem(int argc, const char **argv, const char *prefix __maybe_unused) NULL }; struct perf_session *session; - struct perf_data_file file = { - .path = input_name, - .mode = PERF_DATA_MODE_READ, - }; int ret = -1; argc = parse_options_subcommand(argc, argv, kmem_options, -- 1.9.3