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Commit 26252ea6 authored by Arnaldo Carvalho de Melo's avatar Arnaldo Carvalho de Melo
Browse files

perf evlist: Show event attribute details 

There was no easy way to see the frequency used, and with the change of
default, we better provide one.

[root@sandy linux]# perf evlist -F
cycles: sample_freq=4000
[root@sandy linux]# perf evlist -v
cycles: sample_freq=4000, size: 80, sample_type: 391, read_format: 7, disabled: 1, inherit: 1, mmap: 1, comm: 1, freq: 1, sample_id_all: 1, exclude_guest: 1
[root@sandy linux]#

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-e1p9poez3nwrgycbmwqmhlsu@git.kernel.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 447a6013

tools/perf/Documentation/perf-evlist.txt

+8 −0
Original line number Diff line number Diff line
@@ -20,6 +20,14 @@ OPTIONS 
--input=::

        Input file name. (default: perf.data unless stdin is a fifo)



-F::

--freq=::

	Show just the sample frequency used for each event.



-v::

--verbose=::

	Show all fields.



SEE ALSO

--------

linkperf:perf-record[1], linkperf:perf-list[1],

tools/perf/builtin-evlist.c

+92 −11
Original line number Diff line number Diff line
@@ -15,9 +15,40 @@ 
#include "util/parse-options.h"

#include "util/session.h"



static const char *input_name;

struct perf_attr_details {

	bool freq;

	bool verbose;

};



static int comma_printf(bool *first, const char *fmt, ...)

{

	va_list args;

	int ret = 0;



	if (!*first) {

		ret += printf(",");

	} else {

		ret += printf(":");

		*first = false;

	}



	va_start(args, fmt);

	ret += vprintf(fmt, args);

	va_end(args);

	return ret;

}



static int __if_print(bool *first, const char *field, u64 value)

{

	if (value == 0)

		return 0;



	return comma_printf(first, " %s: %" PRIu64, field, value);

}



static int __cmd_evlist(void)

#define if_print(field) __if_print(&first, #field, pos->attr.field)



static int __cmd_evlist(const char *input_name, struct perf_attr_details *details)

{

	struct perf_session *session;

	struct perf_evsel *pos;
@@ -26,8 +57,52 @@ static int __cmd_evlist(void) 
	if (session == NULL)

		return -ENOMEM;



	list_for_each_entry(pos, &session->evlist->entries, node)

		printf("%s\n", event_name(pos));

	list_for_each_entry(pos, &session->evlist->entries, node) {

		bool first = true;



		printf("%s", event_name(pos));



		if (details->verbose || details->freq) {

			comma_printf(&first, " sample_freq=%" PRIu64,

				     (u64)pos->attr.sample_freq);

		}



		if (details->verbose) {

			if_print(type);

			if_print(config);

			if_print(config1);

			if_print(config2);

			if_print(size);

			if_print(sample_type);

			if_print(read_format);

			if_print(disabled);

			if_print(inherit);

			if_print(pinned);

			if_print(exclusive);

			if_print(exclude_user);

			if_print(exclude_kernel);

			if_print(exclude_hv);

			if_print(exclude_idle);

			if_print(mmap);

			if_print(comm);

			if_print(freq);

			if_print(inherit_stat);

			if_print(enable_on_exec);

			if_print(task);

			if_print(watermark);

			if_print(precise_ip);

			if_print(mmap_data);

			if_print(sample_id_all);

			if_print(exclude_host);

			if_print(exclude_guest);

			if_print(__reserved_1);

			if_print(wakeup_events);

			if_print(bp_type);

			if_print(branch_sample_type);

		}



		putchar('\n');

	}



	perf_session__delete(session);

	return 0;
@@ -38,17 +113,23 @@ static const char * const evlist_usage[] = { 
	NULL

};



static const struct option options[] = {

int cmd_evlist(int argc, const char **argv, const char *prefix __used)

{

	struct perf_attr_details details = { .verbose = false, };

	const char *input_name;

	const struct option options[] = {

		OPT_STRING('i', "input", &input_name, "file",

		    "input file name"),

			    "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_END()

	};



int cmd_evlist(int argc, const char **argv, const char *prefix __used)

{

	argc = parse_options(argc, argv, options, evlist_usage, 0);

	if (argc)

		usage_with_options(evlist_usage, options);



	return __cmd_evlist();

	return __cmd_evlist(input_name, &details);

}