forked from luck/tmp_suning_uos_patched
9e3b6ec173
Enable perf evlist to use perf.data when it is not owned by current user
or root.
Example:
# perf record ls
# chown Yunlong.Song:Yunlong.Song perf.data
# ls -al perf.data
-rw------- 1 Yunlong.Song Yunlong.Song 28260 Apr 2 10:18 perf.data
# id
uid=0(root) gid=0(root) groups=0(root),64(pkcs11)
Before this patch:
# perf evlist
File perf.data not owned by current user or root (use -f to override)
# perf evlist -f
Error: unknown switch `f'
usage: perf evlist [<options>]
-i, --input <file> Input file name
-F, --freq Show the sample frequency
-v, --verbose Show all event attr details
-g, --group Show event group information
As shown above, the -f option does not work at all.
After this patch:
# perf evlist
File perf.data not owned by current user or root (use -f to override)
# perf evlist -f
cycles
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/1427982439-27388-2-git-send-email-yunlong.song@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
70 lines
1.8 KiB
C
70 lines
1.8 KiB
C
/*
|
|
* Builtin evlist command: Show the list of event selectors present
|
|
* in a perf.data file.
|
|
*/
|
|
#include "builtin.h"
|
|
|
|
#include "util/util.h"
|
|
|
|
#include <linux/list.h>
|
|
|
|
#include "perf.h"
|
|
#include "util/evlist.h"
|
|
#include "util/evsel.h"
|
|
#include "util/parse-events.h"
|
|
#include "util/parse-options.h"
|
|
#include "util/session.h"
|
|
#include "util/data.h"
|
|
#include "util/debug.h"
|
|
|
|
static int __cmd_evlist(const char *file_name, struct perf_attr_details *details)
|
|
{
|
|
struct perf_session *session;
|
|
struct perf_evsel *pos;
|
|
struct perf_data_file file = {
|
|
.path = file_name,
|
|
.mode = PERF_DATA_MODE_READ,
|
|
.force = details->force,
|
|
};
|
|
|
|
session = perf_session__new(&file, 0, NULL);
|
|
if (session == NULL)
|
|
return -1;
|
|
|
|
evlist__for_each(session->evlist, pos)
|
|
perf_evsel__fprintf(pos, details, stdout);
|
|
|
|
perf_session__delete(session);
|
|
return 0;
|
|
}
|
|
|
|
int cmd_evlist(int argc, const char **argv, const char *prefix __maybe_unused)
|
|
{
|
|
struct perf_attr_details details = { .verbose = false, };
|
|
const struct option options[] = {
|
|
OPT_STRING('i', "input", &input_name, "file", "Input file name"),
|
|
OPT_BOOLEAN('F', "freq", &details.freq, "Show the sample frequency"),
|
|
OPT_BOOLEAN('v', "verbose", &details.verbose,
|
|
"Show all event attr details"),
|
|
OPT_BOOLEAN('g', "group", &details.event_group,
|
|
"Show event group information"),
|
|
OPT_BOOLEAN('f', "force", &details.force, "don't complain, do it"),
|
|
OPT_END()
|
|
};
|
|
const char * const evlist_usage[] = {
|
|
"perf evlist [<options>]",
|
|
NULL
|
|
};
|
|
|
|
argc = parse_options(argc, argv, options, evlist_usage, 0);
|
|
if (argc)
|
|
usage_with_options(evlist_usage, options);
|
|
|
|
if (details.event_group && (details.verbose || details.freq)) {
|
|
pr_err("--group option is not compatible with other options\n");
|
|
usage_with_options(evlist_usage, options);
|
|
}
|
|
|
|
return __cmd_evlist(input_name, &details);
|
|
}
|