Commit 9ede473c authored by Jiri Olsa's avatar Jiri Olsa Committed by Arnaldo Carvalho de Melo
Browse files

perf tools: Add support for parsing PERF_SAMPLE_READ sample type 



Adding support to parse out the PERF_SAMPLE_READ sample bits.  The code
contains both single and group format specification.

This code parse out and prepare PERF_SAMPLE_READ data into the
perf_sample struct. It will be used for group leader sampling feature
comming in shortly.

Signed-off-by: default avatarJiri Olsa <jolsa@redhat.com>
Acked-by: default avatarNamhyung Kim <namhyung@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/n/tip-0tgdoln5rwk3wocshb442cl3@git.kernel.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent e2b5abe0

tools/perf/util/event.h

+18 −0
Original line number Diff line number Diff line
@@ -80,6 +80,23 @@ struct stack_dump { 
	char *data;

};



struct sample_read_value {

	u64 value;

	u64 id;

};



struct sample_read {

	u64 time_enabled;

	u64 time_running;

	union {

		struct {

			u64 nr;

			struct sample_read_value *values;

		} group;

		struct sample_read_value one;

	};

};



struct perf_sample {

	u64 ip;

	u32 pid, tid;
@@ -97,6 +114,7 @@ struct perf_sample { 
	struct branch_stack *branch_stack;

	struct regs_dump  user_regs;

	struct stack_dump user_stack;

	struct sample_read read;

};



#define PERF_MEM_DATA_SRC_NONE \

tools/perf/util/evlist.c

+26 −0
Original line number Diff line number Diff line
@@ -676,6 +676,32 @@ u64 perf_evlist__sample_type(struct perf_evlist *evlist) 
	return first->attr.sample_type;

}



bool perf_evlist__valid_read_format(struct perf_evlist *evlist)

{

	struct perf_evsel *first = perf_evlist__first(evlist), *pos = first;

	u64 read_format = first->attr.read_format;

	u64 sample_type = first->attr.sample_type;



	list_for_each_entry_continue(pos, &evlist->entries, node) {

		if (read_format != pos->attr.read_format)

			return false;

	}



	/* PERF_SAMPLE_READ imples PERF_FORMAT_ID. */

	if ((sample_type & PERF_SAMPLE_READ) &&

	    !(read_format & PERF_FORMAT_ID)) {

		return false;

	}



	return true;

}



u64 perf_evlist__read_format(struct perf_evlist *evlist)

{

	struct perf_evsel *first = perf_evlist__first(evlist);

	return first->attr.read_format;

}



u16 perf_evlist__id_hdr_size(struct perf_evlist *evlist)

{

	struct perf_evsel *first = perf_evlist__first(evlist);

tools/perf/util/evlist.h

+2 −0
Original line number Diff line number Diff line
@@ -118,6 +118,7 @@ int perf_evlist__apply_filters(struct perf_evlist *evlist); 
void __perf_evlist__set_leader(struct list_head *list);

void perf_evlist__set_leader(struct perf_evlist *evlist);



u64 perf_evlist__read_format(struct perf_evlist *evlist);

u64 perf_evlist__sample_type(struct perf_evlist *evlist);

bool perf_evlist__sample_id_all(struct perf_evlist *evlist);

u16 perf_evlist__id_hdr_size(struct perf_evlist *evlist);
@@ -127,6 +128,7 @@ int perf_evlist__parse_sample(struct perf_evlist *evlist, union perf_event *even 


bool perf_evlist__valid_sample_type(struct perf_evlist *evlist);

bool perf_evlist__valid_sample_id_all(struct perf_evlist *evlist);

bool perf_evlist__valid_read_format(struct perf_evlist *evlist);



void perf_evlist__splice_list_tail(struct perf_evlist *evlist,

				   struct list_head *list,

tools/perf/util/evsel.c

+28 −2
Original line number Diff line number Diff line
@@ -1096,8 +1096,34 @@ int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event, 
	}



	if (type & PERF_SAMPLE_READ) {

		fprintf(stderr, "PERF_SAMPLE_READ is unsupported for now\n");

		return -1;

		u64 read_format = evsel->attr.read_format;



		if (read_format & PERF_FORMAT_GROUP)

			data->read.group.nr = *array;

		else

			data->read.one.value = *array;



		array++;



		if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {

			data->read.time_enabled = *array;

			array++;

		}



		if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {

			data->read.time_running = *array;

			array++;

		}



		/* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */

		if (read_format & PERF_FORMAT_GROUP) {

			data->read.group.values = (struct sample_read_value *) array;

			array = (void *) array + data->read.group.nr *

				sizeof(struct sample_read_value);

		} else {

			data->read.one.id = *array;

			array++;

		}

	}



	if (type & PERF_SAMPLE_CALLCHAIN) {

tools/perf/util/session.c

+38 −0
Original line number Diff line number Diff line
@@ -71,6 +71,11 @@ static int perf_session__open(struct perf_session *self, bool force) 
		goto out_close;

	}



	if (!perf_evlist__valid_read_format(self->evlist)) {

		pr_err("non matching read_format");

		goto out_close;

	}



	self->size = input_stat.st_size;

	return 0;
@@ -749,6 +754,36 @@ static void perf_session__print_tstamp(struct perf_session *session, 
		printf("%" PRIu64 " ", sample->time);

}



static void sample_read__printf(struct perf_sample *sample, u64 read_format)

{

	printf("... sample_read:\n");



	if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)

		printf("...... time enabled %016" PRIx64 "\n",

		       sample->read.time_enabled);



	if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)

		printf("...... time running %016" PRIx64 "\n",

		       sample->read.time_running);



	if (read_format & PERF_FORMAT_GROUP) {

		u64 i;



		printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);



		for (i = 0; i < sample->read.group.nr; i++) {

			struct sample_read_value *value;



			value = &sample->read.group.values[i];

			printf("..... id %016" PRIx64

			       ", value %016" PRIx64 "\n",

			       value->id, value->value);

		}

	} else

		printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",

			sample->read.one.id, sample->read.one.value);

}



static void dump_event(struct perf_session *session, union perf_event *event,

		       u64 file_offset, struct perf_sample *sample)

{
@@ -798,6 +833,9 @@ static void dump_sample(struct perf_evsel *evsel, union perf_event *event, 


	if (sample_type & PERF_SAMPLE_DATA_SRC)

		printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);



	if (sample_type & PERF_SAMPLE_READ)

		sample_read__printf(sample, evsel->attr.read_format);

}



static struct machine *

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