[linux-2.6-block.git] / tools / perf / util / hist.c

#include "hist.h"
#include "session.h"
#include "sort.h"

struct callchain_param	callchain_param = {
	.mode	= CHAIN_GRAPH_REL,
	.min_percent = 0.5
};

/*
 * histogram, sorted on item, collects counts
 */

struct hist_entry *__perf_session__add_hist_entry(struct perf_session *self,
						  struct addr_location *al,
						  struct symbol *sym_parent,
						  u64 count, bool *hit)
{
	struct rb_node **p = &self->hists.rb_node;
	struct rb_node *parent = NULL;
	struct hist_entry *he;
	struct hist_entry entry = {
		.thread	= al->thread,
		.map	= al->map,
		.sym	= al->sym,
		.ip	= al->addr,
		.level	= al->level,
		.count	= count,
		.parent = sym_parent,
	};
	int cmp;

	while (*p != NULL) {
		parent = *p;
		he = rb_entry(parent, struct hist_entry, rb_node);

		cmp = hist_entry__cmp(&entry, he);

		if (!cmp) {
			*hit = true;
			return he;
		}

		if (cmp < 0)
			p = &(*p)->rb_left;
		else
			p = &(*p)->rb_right;
	}

	he = malloc(sizeof(*he));
	if (!he)
		return NULL;
	*he = entry;
	rb_link_node(&he->rb_node, parent, p);
	rb_insert_color(&he->rb_node, &self->hists);
	*hit = false;
	return he;
}

int64_t
hist_entry__cmp(struct hist_entry *left, struct hist_entry *right)
{
	struct sort_entry *se;
	int64_t cmp = 0;

	list_for_each_entry(se, &hist_entry__sort_list, list) {
		cmp = se->cmp(left, right);
		if (cmp)
			break;
	}

	return cmp;
}

int64_t
hist_entry__collapse(struct hist_entry *left, struct hist_entry *right)
{
	struct sort_entry *se;
	int64_t cmp = 0;

	list_for_each_entry(se, &hist_entry__sort_list, list) {
		int64_t (*f)(struct hist_entry *, struct hist_entry *);

		f = se->collapse ?: se->cmp;

		cmp = f(left, right);
		if (cmp)
			break;
	}

	return cmp;
}

void hist_entry__free(struct hist_entry *he)
{
	free(he);
}

/*
 * collapse the histogram
 */

static void collapse__insert_entry(struct rb_root *root, struct hist_entry *he)
{
	struct rb_node **p = &root->rb_node;
	struct rb_node *parent = NULL;
	struct hist_entry *iter;
	int64_t cmp;

	while (*p != NULL) {
		parent = *p;
		iter = rb_entry(parent, struct hist_entry, rb_node);

		cmp = hist_entry__collapse(iter, he);

		if (!cmp) {
			iter->count += he->count;
			hist_entry__free(he);
			return;
		}

		if (cmp < 0)
			p = &(*p)->rb_left;
		else
			p = &(*p)->rb_right;
	}

	rb_link_node(&he->rb_node, parent, p);
	rb_insert_color(&he->rb_node, root);
}

void perf_session__collapse_resort(struct perf_session *self)
{
	struct rb_root tmp;
	struct rb_node *next;
	struct hist_entry *n;

	if (!sort__need_collapse)
		return;

	tmp = RB_ROOT;
	next = rb_first(&self->hists);

	while (next) {
		n = rb_entry(next, struct hist_entry, rb_node);
		next = rb_next(&n->rb_node);

		rb_erase(&n->rb_node, &self->hists);
		collapse__insert_entry(&tmp, n);
	}

	self->hists = tmp;
}

/*
 * reverse the map, sort on count.
 */

static void perf_session__insert_output_hist_entry(struct rb_root *root,
						   struct hist_entry *he,
						   u64 min_callchain_hits)
{
	struct rb_node **p = &root->rb_node;
	struct rb_node *parent = NULL;
	struct hist_entry *iter;

	if (symbol_conf.use_callchain)
		callchain_param.sort(&he->sorted_chain, &he->callchain,
				      min_callchain_hits, &callchain_param);

	while (*p != NULL) {
		parent = *p;
		iter = rb_entry(parent, struct hist_entry, rb_node);

		if (he->count > iter->count)
			p = &(*p)->rb_left;
		else
			p = &(*p)->rb_right;
	}

	rb_link_node(&he->rb_node, parent, p);
	rb_insert_color(&he->rb_node, root);
}

void perf_session__output_resort(struct perf_session *self, u64 total_samples)
{
	struct rb_root tmp;
	struct rb_node *next;
	struct hist_entry *n;
	u64 min_callchain_hits;

	min_callchain_hits =
		total_samples * (callchain_param.min_percent / 100);

	tmp = RB_ROOT;
	next = rb_first(&self->hists);

	while (next) {
		n = rb_entry(next, struct hist_entry, rb_node);
		next = rb_next(&n->rb_node);

		rb_erase(&n->rb_node, &self->hists);
		perf_session__insert_output_hist_entry(&tmp, n,
						       min_callchain_hits);
	}

	self->hists = tmp;
}

static size_t callchain__fprintf_left_margin(FILE *fp, int left_margin)
{
	int i;
	int ret = fprintf(fp, "            ");

	for (i = 0; i < left_margin; i++)
		ret += fprintf(fp, " ");

	return ret;
}

static size_t ipchain__fprintf_graph_line(FILE *fp, int depth, int depth_mask,
					  int left_margin)
{
	int i;
	size_t ret = callchain__fprintf_left_margin(fp, left_margin);

	for (i = 0; i < depth; i++)
		if (depth_mask & (1 << i))
			ret += fprintf(fp, "|          ");
		else
			ret += fprintf(fp, "           ");

	ret += fprintf(fp, "\n");

	return ret;
}

static size_t ipchain__fprintf_graph(FILE *fp, struct callchain_list *chain,
				     int depth, int depth_mask, int count,
				     u64 total_samples, int hits,
				     int left_margin)
{
	int i;
	size_t ret = 0;

	ret += callchain__fprintf_left_margin(fp, left_margin);
	for (i = 0; i < depth; i++) {
		if (depth_mask & (1 << i))
			ret += fprintf(fp, "|");
		else
			ret += fprintf(fp, " ");
		if (!count && i == depth - 1) {
			double percent;

			percent = hits * 100.0 / total_samples;
			ret += percent_color_fprintf(fp, "--%2.2f%%-- ", percent);
		} else
			ret += fprintf(fp, "%s", "          ");
	}
	if (chain->sym)
		ret += fprintf(fp, "%s\n", chain->sym->name);
	else
		ret += fprintf(fp, "%p\n", (void *)(long)chain->ip);

	return ret;
}

static struct symbol *rem_sq_bracket;
static struct callchain_list rem_hits;

static void init_rem_hits(void)
{
	rem_sq_bracket = malloc(sizeof(*rem_sq_bracket) + 6);
	if (!rem_sq_bracket) {
		fprintf(stderr, "Not enough memory to display remaining hits\n");
		return;
	}

	strcpy(rem_sq_bracket->name, "[...]");
	rem_hits.sym = rem_sq_bracket;
}

static size_t __callchain__fprintf_graph(FILE *fp, struct callchain_node *self,
					 u64 total_samples, int depth,
					 int depth_mask, int left_margin)
{
	struct rb_node *node, *next;
	struct callchain_node *child;
	struct callchain_list *chain;
	int new_depth_mask = depth_mask;
	u64 new_total;
	u64 remaining;
	size_t ret = 0;
	int i;

	if (callchain_param.mode == CHAIN_GRAPH_REL)
		new_total = self->children_hit;
	else
		new_total = total_samples;

	remaining = new_total;

	node = rb_first(&self->rb_root);
	while (node) {
		u64 cumul;

		child = rb_entry(node, struct callchain_node, rb_node);
		cumul = cumul_hits(child);
		remaining -= cumul;

		/*
		 * The depth mask manages the output of pipes that show
		 * the depth. We don't want to keep the pipes of the current
		 * level for the last child of this depth.
		 * Except if we have remaining filtered hits. They will
		 * supersede the last child
		 */
		next = rb_next(node);
		if (!next && (callchain_param.mode != CHAIN_GRAPH_REL || !remaining))
			new_depth_mask &= ~(1 << (depth - 1));

		/*
		 * But we keep the older depth mask for the line seperator
		 * to keep the level link until we reach the last child
		 */
		ret += ipchain__fprintf_graph_line(fp, depth, depth_mask,
						   left_margin);
		i = 0;
		list_for_each_entry(chain, &child->val, list) {
			if (chain->ip >= PERF_CONTEXT_MAX)
				continue;
			ret += ipchain__fprintf_graph(fp, chain, depth,
						      new_depth_mask, i++,
						      new_total,
						      cumul,
						      left_margin);
		}
		ret += __callchain__fprintf_graph(fp, child, new_total,
						  depth + 1,
						  new_depth_mask | (1 << depth),
						  left_margin);
		node = next;
	}

	if (callchain_param.mode == CHAIN_GRAPH_REL &&
		remaining && remaining != new_total) {

		if (!rem_sq_bracket)
			return ret;

		new_depth_mask &= ~(1 << (depth - 1));

		ret += ipchain__fprintf_graph(fp, &rem_hits, depth,
					      new_depth_mask, 0, new_total,
					      remaining, left_margin);
	}

	return ret;
}

static size_t callchain__fprintf_graph(FILE *fp, struct callchain_node *self,
				       u64 total_samples, int left_margin)
{
	struct callchain_list *chain;
	bool printed = false;
	int i = 0;
	int ret = 0;

	list_for_each_entry(chain, &self->val, list) {
		if (chain->ip >= PERF_CONTEXT_MAX)
			continue;

		if (!i++ && sort__first_dimension == SORT_SYM)
			continue;

		if (!printed) {
			ret += callchain__fprintf_left_margin(fp, left_margin);
			ret += fprintf(fp, "|\n");
			ret += callchain__fprintf_left_margin(fp, left_margin);
			ret += fprintf(fp, "---");

			left_margin += 3;
			printed = true;
		} else
			ret += callchain__fprintf_left_margin(fp, left_margin);

		if (chain->sym)
			ret += fprintf(fp, " %s\n", chain->sym->name);
		else
			ret += fprintf(fp, " %p\n", (void *)(long)chain->ip);
	}

	ret += __callchain__fprintf_graph(fp, self, total_samples, 1, 1, left_margin);

	return ret;
}

static size_t callchain__fprintf_flat(FILE *fp, struct callchain_node *self,
				      u64 total_samples)
{
	struct callchain_list *chain;
	size_t ret = 0;

	if (!self)
		return 0;

	ret += callchain__fprintf_flat(fp, self->parent, total_samples);


	list_for_each_entry(chain, &self->val, list) {
		if (chain->ip >= PERF_CONTEXT_MAX)
			continue;
		if (chain->sym)
			ret += fprintf(fp, "                %s\n", chain->sym->name);
		else
			ret += fprintf(fp, "                %p\n",
					(void *)(long)chain->ip);
	}

	return ret;
}

static size_t hist_entry_callchain__fprintf(FILE *fp, struct hist_entry *self,
					    u64 total_samples, int left_margin)
{
	struct rb_node *rb_node;
	struct callchain_node *chain;
	size_t ret = 0;

	rb_node = rb_first(&self->sorted_chain);
	while (rb_node) {
		double percent;

		chain = rb_entry(rb_node, struct callchain_node, rb_node);
		percent = chain->hit * 100.0 / total_samples;
		switch (callchain_param.mode) {
		case CHAIN_FLAT:
			ret += percent_color_fprintf(fp, "           %6.2f%%\n",
						     percent);
			ret += callchain__fprintf_flat(fp, chain, total_samples);
			break;
		case CHAIN_GRAPH_ABS: /* Falldown */
		case CHAIN_GRAPH_REL:
			ret += callchain__fprintf_graph(fp, chain, total_samples,
							left_margin);
		case CHAIN_NONE:
		default:
			break;
		}
		ret += fprintf(fp, "\n");
		rb_node = rb_next(rb_node);
	}

	return ret;
}

static size_t hist_entry__fprintf(FILE *fp, struct hist_entry *self,
				  struct perf_session *session)
{
	struct sort_entry *se;
	size_t ret;

	if (symbol_conf.exclude_other && !self->parent)
		return 0;

	if (session->events_stats.total)
		ret = percent_color_fprintf(fp,
					    symbol_conf.field_sep ? "%.2f" : "   %6.2f%%",
					(self->count * 100.0) / session->events_stats.total);
	else
		ret = fprintf(fp, symbol_conf.field_sep ? "%lld" : "%12lld ", self->count);

	if (symbol_conf.show_nr_samples) {
		if (symbol_conf.field_sep)
			fprintf(fp, "%c%lld", *symbol_conf.field_sep, self->count);
		else
			fprintf(fp, "%11lld", self->count);
	}

	list_for_each_entry(se, &hist_entry__sort_list, list) {
		if (se->elide)
			continue;

		fprintf(fp, "%s", symbol_conf.field_sep ?: "  ");
		ret += se->print(fp, self, se->width ? *se->width : 0);
	}

	ret += fprintf(fp, "\n");

	if (symbol_conf.use_callchain) {
		int left_margin = 0;

		if (sort__first_dimension == SORT_COMM) {
			se = list_first_entry(&hist_entry__sort_list, typeof(*se),
						list);
			left_margin = se->width ? *se->width : 0;
			left_margin -= thread__comm_len(self->thread);
		}

		hist_entry_callchain__fprintf(fp, self, session->events_stats.total,
					      left_margin);
	}

	return ret;
}

size_t perf_session__fprintf_hists(struct perf_session *self, FILE *fp)
{
	struct hist_entry *pos;
	struct sort_entry *se;
	struct rb_node *nd;
	size_t ret = 0;
	unsigned int width;
	char *col_width = symbol_conf.col_width_list_str;

	init_rem_hits();

	fprintf(fp, "# Samples: %ld\n", self->events_stats.total);
	fprintf(fp, "#\n");

	fprintf(fp, "# Overhead");
	if (symbol_conf.show_nr_samples) {
		if (symbol_conf.field_sep)
			fprintf(fp, "%cSamples", *symbol_conf.field_sep);
		else
			fputs("  Samples  ", fp);
	}
	list_for_each_entry(se, &hist_entry__sort_list, list) {
		if (se->elide)
			continue;
		if (symbol_conf.field_sep) {
			fprintf(fp, "%c%s", *symbol_conf.field_sep, se->header);
			continue;
		}
		width = strlen(se->header);
		if (se->width) {
			if (symbol_conf.col_width_list_str) {
				if (col_width) {
					*se->width = atoi(col_width);
					col_width = strchr(col_width, ',');
					if (col_width)
						++col_width;
				}
			}
			width = *se->width = max(*se->width, width);
		}
		fprintf(fp, "  %*s", width, se->header);
	}
	fprintf(fp, "\n");

	if (symbol_conf.field_sep)
		goto print_entries;

	fprintf(fp, "# ........");
	if (symbol_conf.show_nr_samples)
		fprintf(fp, " ..........");
	list_for_each_entry(se, &hist_entry__sort_list, list) {
		unsigned int i;

		if (se->elide)
			continue;

		fprintf(fp, "  ");
		if (se->width)
			width = *se->width;
		else
			width = strlen(se->header);
		for (i = 0; i < width; i++)
			fprintf(fp, ".");
	}
	fprintf(fp, "\n");

	fprintf(fp, "#\n");

print_entries:
	for (nd = rb_first(&self->hists); nd; nd = rb_next(nd)) {
		pos = rb_entry(nd, struct hist_entry, rb_node);
		ret += hist_entry__fprintf(fp, pos, self);
	}

	if (sort_order == default_sort_order &&
			parent_pattern == default_parent_pattern) {
		fprintf(fp, "#\n");
		fprintf(fp, "# (For a higher level overview, try: perf report --sort comm,dso)\n");
		fprintf(fp, "#\n");
	}
	fprintf(fp, "\n");

	free(rem_sq_bracket);

	return ret;
}
Commit	Line	Data
3d1d07ec	1	#include "hist.h"
4e4f06e4 ACM	2	#include "session.h"
4e4f06e4 ACM	3	#include "sort.h"
3d1d07ec JK	4
	5	struct callchain_param callchain_param = {
	6	.mode = CHAIN_GRAPH_REL,
	7	.min_percent = 0.5
	8	};
	9
3d1d07ec JK	10	/*
	11	* histogram, sorted on item, collects counts
	12	*/
	13
4e4f06e4 ACM	14	struct hist_entry __perf_session__add_hist_entry(struct perf_session self,
	15	struct addr_location *al,
	16	struct symbol *sym_parent,
	17	u64 count, bool *hit)
9735abf1	18	{
4e4f06e4	19	struct rb_node **p = &self->hists.rb_node;
9735abf1 ACM	20	struct rb_node *parent = NULL;
	21	struct hist_entry *he;
	22	struct hist_entry entry = {
1ed091c4 ACM	23	.thread = al->thread,
	24	.map = al->map,
	25	.sym = al->sym,
	26	.ip = al->addr,
	27	.level = al->level,
9735abf1 ACM	28	.count = count,
	29	.parent = sym_parent,
	30	};
	31	int cmp;
	32
	33	while (*p != NULL) {
	34	parent = *p;
	35	he = rb_entry(parent, struct hist_entry, rb_node);
	36
	37	cmp = hist_entry__cmp(&entry, he);
	38
	39	if (!cmp) {
	40	*hit = true;
	41	return he;
	42	}
	43
	44	if (cmp < 0)
	45	p = &(*p)->rb_left;
	46	else
	47	p = &(*p)->rb_right;
	48	}
	49
	50	he = malloc(sizeof(*he));
	51	if (!he)
	52	return NULL;
	53	*he = entry;
	54	rb_link_node(&he->rb_node, parent, p);
4e4f06e4	55	rb_insert_color(&he->rb_node, &self->hists);
9735abf1 ACM	56	*hit = false;
	57	return he;
	58	}
	59
3d1d07ec JK	60	int64_t
	61	hist_entry__cmp(struct hist_entry left, struct hist_entry right)
	62	{
	63	struct sort_entry *se;
	64	int64_t cmp = 0;
	65
	66	list_for_each_entry(se, &hist_entry__sort_list, list) {
	67	cmp = se->cmp(left, right);
	68	if (cmp)
	69	break;
	70	}
	71
	72	return cmp;
	73	}
	74
	75	int64_t
	76	hist_entry__collapse(struct hist_entry left, struct hist_entry right)
	77	{
	78	struct sort_entry *se;
	79	int64_t cmp = 0;
	80
	81	list_for_each_entry(se, &hist_entry__sort_list, list) {
	82	int64_t (f)(struct hist_entry , struct hist_entry *);
	83
	84	f = se->collapse ?: se->cmp;
	85
	86	cmp = f(left, right);
	87	if (cmp)
	88	break;
	89	}
	90
	91	return cmp;
	92	}
	93
	94	void hist_entry__free(struct hist_entry *he)
	95	{
	96	free(he);
	97	}
	98
	99	/*
	100	* collapse the histogram
	101	*/
	102
b9bf0892	103	static void collapse__insert_entry(struct rb_root root, struct hist_entry he)
3d1d07ec	104	{
b9bf0892	105	struct rb_node **p = &root->rb_node;
3d1d07ec JK	106	struct rb_node *parent = NULL;
	107	struct hist_entry *iter;
	108	int64_t cmp;
	109
	110	while (*p != NULL) {
	111	parent = *p;
	112	iter = rb_entry(parent, struct hist_entry, rb_node);
	113
	114	cmp = hist_entry__collapse(iter, he);
	115
	116	if (!cmp) {
	117	iter->count += he->count;
	118	hist_entry__free(he);
	119	return;
	120	}
	121
	122	if (cmp < 0)
	123	p = &(*p)->rb_left;
	124	else
	125	p = &(*p)->rb_right;
	126	}
	127
	128	rb_link_node(&he->rb_node, parent, p);
b9bf0892	129	rb_insert_color(&he->rb_node, root);
3d1d07ec JK	130	}
3d1d07ec JK	131
4e4f06e4	132	void perf_session__collapse_resort(struct perf_session *self)
3d1d07ec	133	{
b9bf0892	134	struct rb_root tmp;
3d1d07ec JK	135	struct rb_node *next;
	136	struct hist_entry *n;
	137
	138	if (!sort__need_collapse)
	139	return;
	140
b9bf0892	141	tmp = RB_ROOT;
4e4f06e4	142	next = rb_first(&self->hists);
b9bf0892	143
3d1d07ec JK	144	while (next) {
	145	n = rb_entry(next, struct hist_entry, rb_node);
	146	next = rb_next(&n->rb_node);
	147
4e4f06e4	148	rb_erase(&n->rb_node, &self->hists);
b9bf0892	149	collapse__insert_entry(&tmp, n);
3d1d07ec	150	}
b9bf0892	151
4e4f06e4	152	self->hists = tmp;
3d1d07ec JK	153	}
	154
	155	/*
	156	* reverse the map, sort on count.
	157	*/
	158
d599db3f	159	static void perf_session__insert_output_hist_entry(struct rb_root *root,
4e4f06e4 ACM	160	struct hist_entry *he,
4e4f06e4 ACM	161	u64 min_callchain_hits)
3d1d07ec	162	{
b9bf0892	163	struct rb_node **p = &root->rb_node;
3d1d07ec JK	164	struct rb_node *parent = NULL;
	165	struct hist_entry *iter;
	166
d599db3f	167	if (symbol_conf.use_callchain)
3d1d07ec JK	168	callchain_param.sort(&he->sorted_chain, &he->callchain,
	169	min_callchain_hits, &callchain_param);
	170
	171	while (*p != NULL) {
	172	parent = *p;
	173	iter = rb_entry(parent, struct hist_entry, rb_node);
	174
	175	if (he->count > iter->count)
	176	p = &(*p)->rb_left;
	177	else
	178	p = &(*p)->rb_right;
	179	}
	180
	181	rb_link_node(&he->rb_node, parent, p);
b9bf0892	182	rb_insert_color(&he->rb_node, root);
3d1d07ec JK	183	}
3d1d07ec JK	184
4e4f06e4	185	void perf_session__output_resort(struct perf_session *self, u64 total_samples)
3d1d07ec	186	{
b9bf0892	187	struct rb_root tmp;
3d1d07ec JK	188	struct rb_node *next;
3d1d07ec JK	189	struct hist_entry *n;
3d1d07ec JK	190	u64 min_callchain_hits;
	191
	192	min_callchain_hits =
	193	total_samples * (callchain_param.min_percent / 100);
	194
b9bf0892	195	tmp = RB_ROOT;
4e4f06e4	196	next = rb_first(&self->hists);
3d1d07ec JK	197
	198	while (next) {
	199	n = rb_entry(next, struct hist_entry, rb_node);
	200	next = rb_next(&n->rb_node);
	201
4e4f06e4	202	rb_erase(&n->rb_node, &self->hists);
d599db3f	203	perf_session__insert_output_hist_entry(&tmp, n,
4e4f06e4	204	min_callchain_hits);
3d1d07ec	205	}
b9bf0892	206
4e4f06e4	207	self->hists = tmp;
3d1d07ec	208	}
4ecf84d0 ACM	209
	210	static size_t callchain__fprintf_left_margin(FILE *fp, int left_margin)
	211	{
	212	int i;
	213	int ret = fprintf(fp, " ");
	214
	215	for (i = 0; i < left_margin; i++)
	216	ret += fprintf(fp, " ");
	217
	218	return ret;
	219	}
	220
	221	static size_t ipchain__fprintf_graph_line(FILE *fp, int depth, int depth_mask,
	222	int left_margin)
	223	{
	224	int i;
	225	size_t ret = callchain__fprintf_left_margin(fp, left_margin);
	226
	227	for (i = 0; i < depth; i++)
	228	if (depth_mask & (1 << i))
	229	ret += fprintf(fp, "\| ");
	230	else
	231	ret += fprintf(fp, " ");
	232
	233	ret += fprintf(fp, "\n");
	234
	235	return ret;
	236	}
	237
	238	static size_t ipchain__fprintf_graph(FILE fp, struct callchain_list chain,
	239	int depth, int depth_mask, int count,
	240	u64 total_samples, int hits,
	241	int left_margin)
	242	{
	243	int i;
	244	size_t ret = 0;
	245
	246	ret += callchain__fprintf_left_margin(fp, left_margin);
	247	for (i = 0; i < depth; i++) {
	248	if (depth_mask & (1 << i))
	249	ret += fprintf(fp, "\|");
	250	else
	251	ret += fprintf(fp, " ");
	252	if (!count && i == depth - 1) {
	253	double percent;
	254
	255	percent = hits * 100.0 / total_samples;
	256	ret += percent_color_fprintf(fp, "--%2.2f%%-- ", percent);
	257	} else
	258	ret += fprintf(fp, "%s", " ");
	259	}
	260	if (chain->sym)
	261	ret += fprintf(fp, "%s\n", chain->sym->name);
	262	else
	263	ret += fprintf(fp, "%p\n", (void *)(long)chain->ip);
	264
	265	return ret;
	266	}
	267
	268	static struct symbol *rem_sq_bracket;
	269	static struct callchain_list rem_hits;
	270
	271	static void init_rem_hits(void)
	272	{
273	rem_sq_bracket = malloc(sizeof(*rem_sq_bracket) + 6);
274	if (!rem_sq_bracket) {
275	fprintf(stderr, "Not enough memory to display remaining hits\n");
276	return;
277	}
278
279	strcpy(rem_sq_bracket->name, "[...]");
280	rem_hits.sym = rem_sq_bracket;
281	}
282
283	static size_t __callchain__fprintf_graph(FILE fp, struct callchain_node self,
284	u64 total_samples, int depth,
285	int depth_mask, int left_margin)
286	{
287	struct rb_node node, next;
288	struct callchain_node *child;
289	struct callchain_list *chain;
290	int new_depth_mask = depth_mask;
291	u64 new_total;
292	u64 remaining;
293	size_t ret = 0;
294	int i;
295
296	if (callchain_param.mode == CHAIN_GRAPH_REL)
297	new_total = self->children_hit;
298	else
299	new_total = total_samples;
300
301	remaining = new_total;
302
303	node = rb_first(&self->rb_root);
304	while (node) {
305	u64 cumul;
306
307	child = rb_entry(node, struct callchain_node, rb_node);
308	cumul = cumul_hits(child);
309	remaining -= cumul;
310
311	/*
312	* The depth mask manages the output of pipes that show
313	* the depth. We don't want to keep the pipes of the current
314	* level for the last child of this depth.
315	* Except if we have remaining filtered hits. They will
316	* supersede the last child
317	*/
318	next = rb_next(node);
319	if (!next && (callchain_param.mode != CHAIN_GRAPH_REL \|\| !remaining))
320	new_depth_mask &= ~(1 << (depth - 1));
321
322	/*
323	* But we keep the older depth mask for the line seperator
324	* to keep the level link until we reach the last child
325	*/
326	ret += ipchain__fprintf_graph_line(fp, depth, depth_mask,
327	left_margin);
328	i = 0;
329	list_for_each_entry(chain, &child->val, list) {
330	if (chain->ip >= PERF_CONTEXT_MAX)
331	continue;
332	ret += ipchain__fprintf_graph(fp, chain, depth,
333	new_depth_mask, i++,
334	new_total,
335	cumul,
336	left_margin);
337	}
338	ret += __callchain__fprintf_graph(fp, child, new_total,
339	depth + 1,
340	new_depth_mask \| (1 << depth),
341	left_margin);
342	node = next;
343	}
344
345	if (callchain_param.mode == CHAIN_GRAPH_REL &&
346	remaining && remaining != new_total) {
347
348	if (!rem_sq_bracket)
349	return ret;
350
351	new_depth_mask &= ~(1 << (depth - 1));
352
353	ret += ipchain__fprintf_graph(fp, &rem_hits, depth,
354	new_depth_mask, 0, new_total,
355	remaining, left_margin);
356	}
357
358	return ret;
359	}
360
361	static size_t callchain__fprintf_graph(FILE fp, struct callchain_node self,
362	u64 total_samples, int left_margin)
363	{
364	struct callchain_list *chain;
365	bool printed = false;
366	int i = 0;
367	int ret = 0;
368
369	list_for_each_entry(chain, &self->val, list) {
370	if (chain->ip >= PERF_CONTEXT_MAX)
371	continue;
372
373	if (!i++ && sort__first_dimension == SORT_SYM)
374	continue;
375
376	if (!printed) {
377	ret += callchain__fprintf_left_margin(fp, left_margin);
378	ret += fprintf(fp, "\|\n");
379	ret += callchain__fprintf_left_margin(fp, left_margin);
380	ret += fprintf(fp, "---");
381
382	left_margin += 3;
383	printed = true;
384	} else
385	ret += callchain__fprintf_left_margin(fp, left_margin);
386
387	if (chain->sym)
388	ret += fprintf(fp, " %s\n", chain->sym->name);
389	else
390	ret += fprintf(fp, " %p\n", (void *)(long)chain->ip);
391	}
392
393	ret += __callchain__fprintf_graph(fp, self, total_samples, 1, 1, left_margin);
394
395	return ret;
396	}
397
398	static size_t callchain__fprintf_flat(FILE fp, struct callchain_node self,
399	u64 total_samples)
400	{
401	struct callchain_list *chain;
402	size_t ret = 0;
403
404	if (!self)
405	return 0;
406
407	ret += callchain__fprintf_flat(fp, self->parent, total_samples);
408
409
410	list_for_each_entry(chain, &self->val, list) {
411	if (chain->ip >= PERF_CONTEXT_MAX)
412	continue;
413	if (chain->sym)
414	ret += fprintf(fp, " %s\n", chain->sym->name);
415	else
416	ret += fprintf(fp, " %p\n",
417	(void *)(long)chain->ip);
418	}
419
420	return ret;
421	}
422
423	static size_t hist_entry_callchain__fprintf(FILE fp, struct hist_entry self,
424	u64 total_samples, int left_margin)
425	{
426	struct rb_node *rb_node;
427	struct callchain_node *chain;
428	size_t ret = 0;
429
430	rb_node = rb_first(&self->sorted_chain);
431	while (rb_node) {
432	double percent;
433
434	chain = rb_entry(rb_node, struct callchain_node, rb_node);
435	percent = chain->hit * 100.0 / total_samples;
436	switch (callchain_param.mode) {
437	case CHAIN_FLAT:
438	ret += percent_color_fprintf(fp, " %6.2f%%\n",
439	percent);
440	ret += callchain__fprintf_flat(fp, chain, total_samples);
441	break;
442	case CHAIN_GRAPH_ABS: /* Falldown */
443	case CHAIN_GRAPH_REL:
444	ret += callchain__fprintf_graph(fp, chain, total_samples,
445	left_margin);
446	case CHAIN_NONE:
447	default:
448	break;
449	}
450	ret += fprintf(fp, "\n");
451	rb_node = rb_next(rb_node);
452	}
453
454	return ret;
455	}
456
457	static size_t hist_entry__fprintf(FILE fp, struct hist_entry self,
458	struct perf_session *session)
459	{
460	struct sort_entry *se;
461	size_t ret;
462
463	if (symbol_conf.exclude_other && !self->parent)
464	return 0;
465
466	if (session->events_stats.total)
467	ret = percent_color_fprintf(fp,
468	symbol_conf.field_sep ? "%.2f" : " %6.2f%%",
469	(self->count * 100.0) / session->events_stats.total);
470	else
471	ret = fprintf(fp, symbol_conf.field_sep ? "%lld" : "%12lld ", self->count);
472
473	if (symbol_conf.show_nr_samples) {
474	if (symbol_conf.field_sep)
475	fprintf(fp, "%c%lld", *symbol_conf.field_sep, self->count);
476	else
477	fprintf(fp, "%11lld", self->count);
478	}
479
480	list_for_each_entry(se, &hist_entry__sort_list, list) {
481	if (se->elide)
482	continue;
483
484	fprintf(fp, "%s", symbol_conf.field_sep ?: " ");
485	ret += se->print(fp, self, se->width ? *se->width : 0);
486	}
487
488	ret += fprintf(fp, "\n");
489
490	if (symbol_conf.use_callchain) {
491	int left_margin = 0;
492
493	if (sort__first_dimension == SORT_COMM) {
494	se = list_first_entry(&hist_entry__sort_list, typeof(*se),
495	list);
496	left_margin = se->width ? *se->width : 0;
497	left_margin -= thread__comm_len(self->thread);
498	}
499
500	hist_entry_callchain__fprintf(fp, self, session->events_stats.total,
501	left_margin);
502	}
503
504	return ret;
505	}
506
507	size_t perf_session__fprintf_hists(struct perf_session self, FILE fp)
508	{
509	struct hist_entry *pos;
510	struct sort_entry *se;
511	struct rb_node *nd;
512	size_t ret = 0;
513	unsigned int width;
514	char *col_width = symbol_conf.col_width_list_str;
515
516	init_rem_hits();
517
518	fprintf(fp, "# Samples: %ld\n", self->events_stats.total);
519	fprintf(fp, "#\n");
520
521	fprintf(fp, "# Overhead");
522	if (symbol_conf.show_nr_samples) {
523	if (symbol_conf.field_sep)
524	fprintf(fp, "%cSamples", *symbol_conf.field_sep);
525	else
526	fputs(" Samples ", fp);
527	}
528	list_for_each_entry(se, &hist_entry__sort_list, list) {
529	if (se->elide)
530	continue;
531	if (symbol_conf.field_sep) {
532	fprintf(fp, "%c%s", *symbol_conf.field_sep, se->header);
533	continue;
534	}
535	width = strlen(se->header);
536	if (se->width) {
537	if (symbol_conf.col_width_list_str) {
538	if (col_width) {
539	*se->width = atoi(col_width);
540	col_width = strchr(col_width, ',');
541	if (col_width)
542	++col_width;
543	}
544	}
545	width = se->width = max(se->width, width);
546	}
547	fprintf(fp, " %*s", width, se->header);
548	}
549	fprintf(fp, "\n");
550
551	if (symbol_conf.field_sep)
552	goto print_entries;
553
554	fprintf(fp, "# ........");
555	if (symbol_conf.show_nr_samples)
556	fprintf(fp, " ..........");
557	list_for_each_entry(se, &hist_entry__sort_list, list) {
558	unsigned int i;
559
560	if (se->elide)
561	continue;
562
563	fprintf(fp, " ");
564	if (se->width)
565	width = *se->width;
566	else
567	width = strlen(se->header);
568	for (i = 0; i < width; i++)
569	fprintf(fp, ".");
570	}
571	fprintf(fp, "\n");
572
573	fprintf(fp, "#\n");
574
575	print_entries:
576	for (nd = rb_first(&self->hists); nd; nd = rb_next(nd)) {
577	pos = rb_entry(nd, struct hist_entry, rb_node);
578	ret += hist_entry__fprintf(fp, pos, self);
579	}
580
581	if (sort_order == default_sort_order &&
582	parent_pattern == default_parent_pattern) {
583	fprintf(fp, "#\n");
584	fprintf(fp, "# (For a higher level overview, try: perf report --sort comm,dso)\n");
585	fprintf(fp, "#\n");
586	}
587	fprintf(fp, "\n");
588
589	free(rem_sq_bracket);
590
591	return ret;
592	}