Commit-ID: d1eeb77c1811fd178442ccb8f58004a19ec40dd3
Gitweb: http://git.kernel.org/tip/d1eeb77c1811fd178442ccb8f58004a19ec40dd3
Author: Yunlong Song <yunlong.s...@huawei.com>
AuthorDate: Thu, 2 Apr 2015 21:47:12 +0800
Committer: Arnaldo Carvalho de Melo <a...@redhat.com>
CommitDate: Thu, 2 Apr 2015 13:18:46 -0300
perf kmem: Support using -f to override perf.data file ownership
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.s...@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <a...@redhat.com>
Cc: Paul Mackerras <pau...@samba.org>
Cc: Peter Zijlstra <a.p.zijls...@chello.nl>
Cc: Wang Nan <wangn...@huawei.com>
Link:
http://lkml.kernel.org/r/1427982439-27388-4-git-send-email-yunlong.s...@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <a...@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 64d3623..ac303ef 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,
--
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