From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Ingo Molnar <mingo@kernel.org>
Cc: linux-kernel@vger.kernel.org,
Yunlong Song <yunlong.song@huawei.com>,
Paul Mackerras <paulus@samba.org>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Wang Nan <wangnan0@huawei.com>,
Arnaldo Carvalho de Melo <acme@redhat.com>
Subject: [PATCH 08/15] perf kmem: Support using -f to override perf.data file ownership
Date: Thu, 2 Apr 2015 19:28:59 -0300 [thread overview]
Message-ID: <1428013746-2037-9-git-send-email-acme@kernel.org> (raw)
In-Reply-To: <1428013746-2037-1-git-send-email-acme@kernel.org>
From: Yunlong Song <yunlong.song@huawei.com>
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 [<options>] {record|stat}
-i, --input <file> input file name
-v, --verbose be more verbose (show symbol address, etc)
--caller show per-callsite statistics
--alloc show per-allocation statistics
-s, --sort <key[,key2...]>
sort by keys: ptr, call_site, bytes, hit,
pingpong, frag
-l, --line <num> 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 <yunlong.song@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1427982439-27388-4-git-send-email-yunlong.song@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
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
next prev parent reply other threads:[~2015-04-02 22:29 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-02 22:28 [GIT PULL 00/15] perf/core improvements and fixes Arnaldo Carvalho de Melo
2015-04-02 22:28 ` [PATCH 01/15] perf script: No need to lookup thread twice Arnaldo Carvalho de Melo
2015-04-02 22:28 ` [PATCH 02/15] perf scripting: No need to pass thread twice to the scripting callbacks Arnaldo Carvalho de Melo
2015-04-02 22:28 ` [PATCH 03/15] perf db-export: No need to pass thread twice to db_export__sample Arnaldo Carvalho de Melo
2015-04-02 22:28 ` [PATCH 04/15] perf db-export: No need to have ->thread twice in struct export_sample Arnaldo Carvalho de Melo
2015-04-02 22:28 ` [PATCH 05/15] perf probe: Fix to track down unnamed union/structure members Arnaldo Carvalho de Melo
2015-04-02 22:28 ` [PATCH 06/15] perf evlist: Support using -f to override perf.data file ownership Arnaldo Carvalho de Melo
2015-04-02 22:28 ` [PATCH 07/15] perf inject: " Arnaldo Carvalho de Melo
2015-04-02 22:28 ` Arnaldo Carvalho de Melo [this message]
2015-04-02 22:29 ` [PATCH 09/15] perf kvm: Support using -f to override perf.data.guest " Arnaldo Carvalho de Melo
2015-04-02 22:29 ` [PATCH 10/15] perf lock: Support using -f to override perf.data " Arnaldo Carvalho de Melo
2015-04-02 22:29 ` [PATCH 11/15] perf mem: " Arnaldo Carvalho de Melo
2015-04-02 22:29 ` [PATCH 12/15] perf script: " Arnaldo Carvalho de Melo
2015-04-02 22:29 ` [PATCH 13/15] perf timechart: " Arnaldo Carvalho de Melo
2015-04-02 22:29 ` [PATCH 14/15] perf trace: " Arnaldo Carvalho de Melo
2015-04-02 22:29 ` [PATCH 15/15] perf data: Support using -f to override perf.data file ownership for 'convert' Arnaldo Carvalho de Melo
2015-04-03 5:02 ` [GIT PULL 00/15] perf/core improvements and fixes Ingo Molnar
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