mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-29 23:53:32 +00:00
96aea4daa6
Likewise, perf evlist command should print event attributes by reading
PERF_RECORD_HEADER_ATTR records.
Before:
$ perf record -o- true | ./perf evlist -i-
(prints nothing)
After:
$ perf record -o- true | ./perf evlist -i-
cycles:pppH
Committer testing:
Verbose mode also works as expected:
$ perf record -o- true | perf evlist -i-
cycles:uhH
$ perf record -o- true | perf evlist -vi-
cycles:uhH: size: 120, { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|ID|PERIOD, read_format: ID, disabled: 1, inherit: 1, exclude_kernel: 1, mmap: 1, comm: 1, freq: 1, enable_on_exec: 1, task: 1, sample_id_all: 1, exclude_guest: 1, mmap2: 1, comm_exec: 1, ksymbol: 1, bpf_event: 1
$
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: https://lore.kernel.org/r/20201210061302.88213-2-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
95 lines
2.5 KiB
C
95 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Builtin evlist command: Show the list of event selectors present
|
|
* in a perf.data file.
|
|
*/
|
|
#include "builtin.h"
|
|
|
|
#include <linux/list.h>
|
|
|
|
#include "perf.h"
|
|
#include "util/evlist.h"
|
|
#include "util/evsel.h"
|
|
#include "util/evsel_fprintf.h"
|
|
#include "util/parse-events.h"
|
|
#include <subcmd/parse-options.h>
|
|
#include "util/session.h"
|
|
#include "util/data.h"
|
|
#include "util/debug.h"
|
|
#include <linux/err.h>
|
|
#include "util/tool.h"
|
|
|
|
static int process_header_feature(struct perf_session *session __maybe_unused,
|
|
union perf_event *event __maybe_unused)
|
|
{
|
|
session_done = 1;
|
|
return 0;
|
|
}
|
|
|
|
static int __cmd_evlist(const char *file_name, struct perf_attr_details *details)
|
|
{
|
|
struct perf_session *session;
|
|
struct evsel *pos;
|
|
struct perf_data data = {
|
|
.path = file_name,
|
|
.mode = PERF_DATA_MODE_READ,
|
|
.force = details->force,
|
|
};
|
|
struct perf_tool tool = {
|
|
/* only needed for pipe mode */
|
|
.attr = perf_event__process_attr,
|
|
.feature = process_header_feature,
|
|
};
|
|
bool has_tracepoint = false;
|
|
|
|
session = perf_session__new(&data, 0, &tool);
|
|
if (IS_ERR(session))
|
|
return PTR_ERR(session);
|
|
|
|
if (data.is_pipe)
|
|
perf_session__process_events(session);
|
|
|
|
evlist__for_each_entry(session->evlist, pos) {
|
|
evsel__fprintf(pos, details, stdout);
|
|
|
|
if (pos->core.attr.type == PERF_TYPE_TRACEPOINT)
|
|
has_tracepoint = true;
|
|
}
|
|
|
|
if (has_tracepoint && !details->trace_fields)
|
|
printf("# Tip: use 'perf evlist --trace-fields' to show fields for tracepoint events\n");
|
|
|
|
perf_session__delete(session);
|
|
return 0;
|
|
}
|
|
|
|
int cmd_evlist(int argc, const char **argv)
|
|
{
|
|
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_BOOLEAN(0, "trace-fields", &details.trace_fields, "Show tracepoint fields"),
|
|
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)) {
|
|
usage_with_options_msg(evlist_usage, options,
|
|
"--group option is not compatible with other options\n");
|
|
}
|
|
|
|
return __cmd_evlist(input_name, &details);
|
|
}
|