Commit 7a13aa28 authored by Namhyung Kim's avatar Namhyung Kim Committed by Jiri Olsa
Browse files

perf hists: Accumulate hist entry stat based on the callchain 



Call __hists__add_entry() for each callchain node to get an
accumulated stat for an entry.  Introduce new cumulative_iter ops to
process them properly.

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/1401335910-16832-6-git-send-email-namhyung@kernel.org


Signed-off-by: default avatarJiri Olsa <jolsa@kernel.org>
parent a0b51af3

tools/perf/builtin-report.c

+2 −0
Original line number Diff line number Diff line
@@ -115,6 +115,8 @@ static int process_sample_event(struct perf_tool *tool, 
		iter.ops = &hist_iter_branch;

	else if (rep->mem_mode)

		iter.ops = &hist_iter_mem;

	else if (symbol_conf.cumulate_callchain)

		iter.ops = &hist_iter_cumulative;

	else

		iter.ops = &hist_iter_normal;

tools/perf/util/callchain.c

+2 −1
Original line number Diff line number Diff line
@@ -616,7 +616,8 @@ int sample__resolve_callchain(struct perf_sample *sample, struct symbol **parent 
	if (sample->callchain == NULL)

		return 0;



	if (symbol_conf.use_callchain || sort__has_parent) {

	if (symbol_conf.use_callchain || symbol_conf.cumulate_callchain ||

	    sort__has_parent) {

		return machine__resolve_callchain(al->machine, evsel, al->thread,

						  sample, parent, al, max_stack);

	}

tools/perf/util/hist.c

+96 −0
Original line number Diff line number Diff line
@@ -696,6 +696,94 @@ iter_finish_normal_entry(struct hist_entry_iter *iter, struct addr_location *al) 
	return hist_entry__append_callchain(he, sample);

}



static int

iter_prepare_cumulative_entry(struct hist_entry_iter *iter __maybe_unused,

			      struct addr_location *al __maybe_unused)

{

	callchain_cursor_commit(&callchain_cursor);

	return 0;

}



static int

iter_add_single_cumulative_entry(struct hist_entry_iter *iter,

				 struct addr_location *al)

{

	struct perf_evsel *evsel = iter->evsel;

	struct perf_sample *sample = iter->sample;

	struct hist_entry *he;

	int err = 0;



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

				sample->period, sample->weight,

				sample->transaction, true);

	if (he == NULL)

		return -ENOMEM;



	iter->he = he;



	/*

	 * 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;

}



static int

iter_next_cumulative_entry(struct hist_entry_iter *iter,

			   struct addr_location *al)

{

	struct callchain_cursor_node *node;



	node = callchain_cursor_current(&callchain_cursor);

	if (node == NULL)

		return 0;



	al->map = node->map;

	al->sym = node->sym;

	if (node->map)

		al->addr = node->map->map_ip(node->map, node->ip);

	else

		al->addr = node->ip;



	if (iter->hide_unresolved && al->sym == NULL)

		return 0;



	callchain_cursor_advance(&callchain_cursor);

	return 1;

}



static int

iter_add_next_cumulative_entry(struct hist_entry_iter *iter,

			       struct addr_location *al)

{

	struct perf_evsel *evsel = iter->evsel;

	struct perf_sample *sample = iter->sample;

	struct hist_entry *he;



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

				sample->period, sample->weight,

				sample->transaction, false);

	if (he == NULL)

		return -ENOMEM;



	iter->he = he;



	return 0;

}



static int

iter_finish_cumulative_entry(struct hist_entry_iter *iter,

			     struct addr_location *al __maybe_unused)

{

	iter->he = NULL;

	return 0;

}



const struct hist_iter_ops hist_iter_mem = {

	.prepare_entry 		= iter_prepare_mem_entry,

	.add_single_entry 	= iter_add_single_mem_entry,
@@ -720,6 +808,14 @@ const struct hist_iter_ops hist_iter_normal = { 
	.finish_entry 		= iter_finish_normal_entry,

};



const struct hist_iter_ops hist_iter_cumulative = {

	.prepare_entry 		= iter_prepare_cumulative_entry,

	.add_single_entry 	= iter_add_single_cumulative_entry,

	.next_entry 		= iter_next_cumulative_entry,

	.add_next_entry 	= iter_add_next_cumulative_entry,

	.finish_entry 		= iter_finish_cumulative_entry,

};



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)

tools/perf/util/hist.h

+1 −0
Original line number Diff line number Diff line
@@ -124,6 +124,7 @@ struct hist_entry_iter { 
extern const struct hist_iter_ops hist_iter_normal;

extern const struct hist_iter_ops hist_iter_branch;

extern const struct hist_iter_ops hist_iter_mem;

extern const struct hist_iter_ops hist_iter_cumulative;



struct hist_entry *__hists__add_entry(struct hists *hists,

				      struct addr_location *al,

CRA Git | Maintained and supported by SUSTech CRA and CCSE