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Commit 9d3c02d7 authored by Namhyung Kim's avatar Namhyung Kim Committed by Jiri Olsa
Browse files

perf tools: Add callback function to hist_entry_iter 



The new ->add_entry_cb() will be called after an entry was added to
the histogram.  It's used for code sharing between perf report and
perf top.  Note that ops->add_*_entry() should set iter->he properly
in order to call the ->add_entry_cb.

Also pass @arg to the callback function.  It'll be used by perf top
later.

Signed-off-by: default avatarNamhyung Kim <namhyung@kernel.org>
Tested-by: default avatarArun Sharma <asharma@fb.com>
Tested-by: default avatarRodrigo Campos <rodrigo@sdfg.com.ar>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/87k393g999.fsf@sejong.aot.lge.com


Signed-off-by: default avatarJiri Olsa <jolsa@kernel.org>
parent 2bf1a123

tools/perf/builtin-report.c

+53 −8
Original line number Diff line number Diff line
@@ -80,16 +80,61 @@ static int report__config(const char *var, const char *value, void *cb) 
	return perf_default_config(var, value, cb);

}



static void report__inc_stats(struct report *rep,

			      struct hist_entry *he __maybe_unused)

static void report__inc_stats(struct report *rep, struct hist_entry *he)

{

	/*

	 * We cannot access @he at this time.  Just assume it's a new entry.

	 * It'll be fixed once we have a callback mechanism in hist_iter.

	 * The @he is either of a newly created one or an existing one

	 * merging current sample.  We only want to count a new one so

	 * checking ->nr_events being 1.

	 */

	if (he->stat.nr_events == 1)

		rep->nr_entries++;

}



static int hist_iter__report_callback(struct hist_entry_iter *iter,

				      struct addr_location *al, bool single,

				      void *arg)

{

	int err = 0;

	struct report *rep = arg;

	struct hist_entry *he = iter->he;

	struct perf_evsel *evsel = iter->evsel;

	struct mem_info *mi;

	struct branch_info *bi;



	report__inc_stats(rep, he);



	if (!ui__has_annotation())

		return 0;



	if (sort__mode == SORT_MODE__BRANCH) {

		bi = he->branch_info;

		err = addr_map_symbol__inc_samples(&bi->from, evsel->idx);

		if (err)

			goto out;



		err = addr_map_symbol__inc_samples(&bi->to, evsel->idx);



	} else if (rep->mem_mode) {

		mi = he->mem_info;

		err = addr_map_symbol__inc_samples(&mi->daddr, evsel->idx);

		if (err)

			goto out;



		err = hist_entry__inc_addr_samples(he, evsel->idx, al->addr);



	} else if (symbol_conf.cumulate_callchain) {

		if (single)

			err = hist_entry__inc_addr_samples(he, evsel->idx,

							   al->addr);

	} else {

		err = hist_entry__inc_addr_samples(he, evsel->idx, al->addr);

	}



out:

	return err;

}



static int process_sample_event(struct perf_tool *tool,

				union perf_event *event,

				struct perf_sample *sample,
@@ -100,6 +145,7 @@ static int process_sample_event(struct perf_tool *tool, 
	struct addr_location al;

	struct hist_entry_iter iter = {

		.hide_unresolved = rep->hide_unresolved,

		.add_entry_cb = hist_iter__report_callback,

	};

	int ret;
@@ -127,9 +173,8 @@ static int process_sample_event(struct perf_tool *tool, 
	if (al.map != NULL)

		al.map->dso->hit = 1;



	report__inc_stats(rep, NULL);



	ret = hist_entry_iter__add(&iter, &al, evsel, sample, rep->max_stack);

	ret = hist_entry_iter__add(&iter, &al, evsel, sample, rep->max_stack,

				   rep);

	if (ret < 0)

		pr_debug("problem adding hist entry, skipping event\n");

tools/perf/tests/hists_filter.c

+1 −1
Original line number Diff line number Diff line
@@ -82,7 +82,7 @@ static int add_hist_entries(struct perf_evlist *evlist, 
				goto out;



			if (hist_entry_iter__add(&iter, &al, evsel, &sample,

						 PERF_MAX_STACK_DEPTH) < 0)

						 PERF_MAX_STACK_DEPTH, NULL) < 0)

				goto out;



			fake_samples[i].thread = al.thread;

tools/perf/tests/hists_output.c

+1 −1
Original line number Diff line number Diff line
@@ -71,7 +71,7 @@ static int add_hist_entries(struct hists *hists, struct machine *machine) 
			goto out;



		if (hist_entry_iter__add(&iter, &al, evsel, &sample,

					 PERF_MAX_STACK_DEPTH) < 0)

					 PERF_MAX_STACK_DEPTH, NULL) < 0)

			goto out;



		fake_samples[i].thread = al.thread;

tools/perf/util/hist.c

+25 −42
Original line number Diff line number Diff line
@@ -517,27 +517,16 @@ iter_add_single_mem_entry(struct hist_entry_iter *iter, struct addr_location *al 
}



static int

iter_finish_mem_entry(struct hist_entry_iter *iter, struct addr_location *al)

iter_finish_mem_entry(struct hist_entry_iter *iter,

		      struct addr_location *al __maybe_unused)

{

	struct perf_evsel *evsel = iter->evsel;

	struct hist_entry *he = iter->he;

	struct mem_info *mx;

	int err = -EINVAL;



	if (he == NULL)

		goto out;



	if (ui__has_annotation()) {

		err = hist_entry__inc_addr_samples(he, evsel->idx, al->addr);

		if (err)

			goto out;



		mx = he->mem_info;

		err = addr_map_symbol__inc_samples(&mx->daddr, evsel->idx);

		if (err)

			goto out;

	}



	hists__inc_nr_samples(&evsel->hists, he->filtered);



	err = hist_entry__append_callchain(he, iter->sample);
@@ -575,6 +564,9 @@ static int 
iter_add_single_branch_entry(struct hist_entry_iter *iter __maybe_unused,

			     struct addr_location *al __maybe_unused)

{

	/* to avoid calling callback function */

	iter->he = NULL;



	return 0;

}
@@ -599,7 +591,7 @@ iter_next_branch_entry(struct hist_entry_iter *iter, struct addr_location *al) 
static int

iter_add_next_branch_entry(struct hist_entry_iter *iter, struct addr_location *al)

{

	struct branch_info *bi, *bx;

	struct branch_info *bi;

	struct perf_evsel *evsel = iter->evsel;

	struct hist_entry *he = NULL;

	int i = iter->curr;
@@ -619,17 +611,6 @@ iter_add_next_branch_entry(struct hist_entry_iter *iter, struct addr_location *a 
	if (he == NULL)

		return -ENOMEM;



	if (ui__has_annotation()) {

		bx = he->branch_info;

		err = addr_map_symbol__inc_samples(&bx->from, evsel->idx);

		if (err)

			goto out;



		err = addr_map_symbol__inc_samples(&bx->to, evsel->idx);

		if (err)

			goto out;

	}



	hists__inc_nr_samples(&evsel->hists, he->filtered);



out:
@@ -673,9 +654,9 @@ iter_add_single_normal_entry(struct hist_entry_iter *iter, struct addr_location 
}



static int

iter_finish_normal_entry(struct hist_entry_iter *iter, struct addr_location *al)

iter_finish_normal_entry(struct hist_entry_iter *iter,

			 struct addr_location *al __maybe_unused)

{

	int err;

	struct hist_entry *he = iter->he;

	struct perf_evsel *evsel = iter->evsel;

	struct perf_sample *sample = iter->sample;
@@ -685,12 +666,6 @@ iter_finish_normal_entry(struct hist_entry_iter *iter, struct addr_location *al) 


	iter->he = NULL;



	if (ui__has_annotation()) {

		err = hist_entry__inc_addr_samples(he, evsel->idx, al->addr);

		if (err)

			return err;

	}



	hists__inc_nr_samples(&evsel->hists, he->filtered);



	return hist_entry__append_callchain(he, sample);
@@ -746,13 +721,6 @@ iter_add_single_cumulative_entry(struct hist_entry_iter *iter, 
	 */

	callchain_cursor_commit(&callchain_cursor);



	/*

	 * The iter->he will be over-written after ->add_next_entry()

	 * called so inc stats for the original entry now.

	 */

	if (ui__has_annotation())

		err = hist_entry__inc_addr_samples(he, evsel->idx, al->addr);



	hists__inc_nr_samples(&evsel->hists, he->filtered);



	return err;
@@ -802,9 +770,12 @@ iter_add_next_cumulative_entry(struct hist_entry_iter *iter, 
	 * It's possible that it has cycles or recursive calls.

	 */

	for (i = 0; i < iter->curr; i++) {

		if (hist_entry__cmp(he_cache[i], &he_tmp) == 0)

		if (hist_entry__cmp(he_cache[i], &he_tmp) == 0) {

			/* to avoid calling callback function */

			iter->he = NULL;

			return 0;

		}

	}



	he = __hists__add_entry(&evsel->hists, al, iter->parent, NULL, NULL,

				sample->period, sample->weight,
@@ -863,7 +834,7 @@ const struct hist_iter_ops hist_iter_cumulative = { 


int hist_entry_iter__add(struct hist_entry_iter *iter, struct addr_location *al,

			 struct perf_evsel *evsel, struct perf_sample *sample,

			 int max_stack_depth)

			 int max_stack_depth, void *arg)

{

	int err, err2;
@@ -883,10 +854,22 @@ int hist_entry_iter__add(struct hist_entry_iter *iter, struct addr_location *al, 
	if (err)

		goto out;



	if (iter->he && iter->add_entry_cb) {

		err = iter->add_entry_cb(iter, al, true, arg);

		if (err)

			goto out;

	}



	while (iter->ops->next_entry(iter, al)) {

		err = iter->ops->add_next_entry(iter, al);

		if (err)

			break;



		if (iter->he && iter->add_entry_cb) {

			err = iter->add_entry_cb(iter, al, false, arg);

			if (err)

				goto out;

		}

	}



out:

tools/perf/util/hist.h

+4 −1
Original line number Diff line number Diff line
@@ -119,6 +119,9 @@ struct hist_entry_iter { 
	void *priv;



	const struct hist_iter_ops *ops;

	/* user-defined callback function (optional) */

	int (*add_entry_cb)(struct hist_entry_iter *iter,

			    struct addr_location *al, bool single, void *arg);

};



extern const struct hist_iter_ops hist_iter_normal;
@@ -135,7 +138,7 @@ struct hist_entry *__hists__add_entry(struct hists *hists, 
				      bool sample_self);

int hist_entry_iter__add(struct hist_entry_iter *iter, struct addr_location *al,

			 struct perf_evsel *evsel, struct perf_sample *sample,

			 int max_stack_depth);

			 int max_stack_depth, void *arg);



int64_t hist_entry__cmp(struct hist_entry *left, struct hist_entry *right);

int64_t hist_entry__collapse(struct hist_entry *left, struct hist_entry *right);