tools/perf/ui/stdio/hist.c - kernel/msm-4.9 - Gitiles

 #include <stdio.h>

 #include "../../util/util.h"
 #include "../../util/hist.h"
 #include "../../util/sort.h"
 #include "../../util/evsel.h"


 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 period,
 				     u64 total_samples, u64 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 (!period && 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->ms.sym)
 		ret += fprintf(fp, "%s\n", chain->ms.sym->name);
 	else
 		ret += fprintf(fp, "0x%0" PRIx64 "\n", 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.ms.sym = rem_sq_bracket;
 }

 static size_t __callchain__fprintf_graph(FILE *fp, struct rb_root *root,
 					 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 remaining;
 	size_t ret = 0;
 	int i;
 	uint entries_printed = 0;

 	remaining = total_samples;

 	node = rb_first(root);
 	while (node) {
 		u64 new_total;
 		u64 cumul;

 		child = rb_entry(node, struct callchain_node, rb_node);
 		cumul = callchain_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 separator
 		 * 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) {
 			ret += ipchain__fprintf_graph(fp, chain, depth,
 						      new_depth_mask, i++,
 						      total_samples,
 						      cumul,
 						      left_margin);
 		}

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

 		ret += __callchain__fprintf_graph(fp, &child->rb_root, new_total,
 						  depth + 1,
 						  new_depth_mask | (1 << depth),
 						  left_margin);
 		node = next;
 		if (++entries_printed == callchain_param.print_limit)
 			break;
 	}

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

 		if (!rem_sq_bracket)
 			return ret;

 		new_depth_mask &= ~(1 << (depth - 1));
 		ret += ipchain__fprintf_graph(fp, &rem_hits, depth,
 					      new_depth_mask, 0, total_samples,
 					      remaining, left_margin);
 	}

 	return ret;
 }

 static size_t callchain__fprintf_graph(FILE *fp, struct rb_root *root,
 				       u64 total_samples, int left_margin)
 {
 	struct callchain_node *cnode;
 	struct callchain_list *chain;
 	u32 entries_printed = 0;
 	bool printed = false;
 	struct rb_node *node;
 	int i = 0;
 	int ret = 0;

 	/*
 	 * If have one single callchain root, don't bother printing
 	 * its percentage (100 % in fractal mode and the same percentage
 	 * than the hist in graph mode). This also avoid one level of column.
 	 */
 	node = rb_first(root);
 	if (node && !rb_next(node)) {
 		cnode = rb_entry(node, struct callchain_node, rb_node);
 		list_for_each_entry(chain, &cnode->val, list) {
 			/*
 			 * If we sort by symbol, the first entry is the same than
 			 * the symbol. No need to print it otherwise it appears as
 			 * displayed twice.
 			 */
 			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->ms.sym)
 				ret += fprintf(fp, " %s\n", chain->ms.sym->name);
 			else
 				ret += fprintf(fp, " %p\n", (void *)(long)chain->ip);

 			if (++entries_printed == callchain_param.print_limit)
 				break;
 		}
 		root = &cnode->rb_root;
 	}

 	ret += __callchain__fprintf_graph(fp, root, total_samples,
 					  1, 1, left_margin);
 	ret += fprintf(fp, "\n");

 	return ret;
 }

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

 	if (!node)
 		return 0;

 	ret += __callchain__fprintf_flat(fp, node->parent, total_samples);


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

 	return ret;
 }

 static size_t callchain__fprintf_flat(FILE *fp, struct rb_root *tree,
 				      u64 total_samples)
 {
 	size_t ret = 0;
 	u32 entries_printed = 0;
 	struct callchain_node *chain;
 	struct rb_node *rb_node = rb_first(tree);

 	while (rb_node) {
 		double percent;

 		chain = rb_entry(rb_node, struct callchain_node, rb_node);
 		percent = chain->hit * 100.0 / total_samples;

 		ret = percent_color_fprintf(fp, "           %6.2f%%\n", percent);
 		ret += __callchain__fprintf_flat(fp, chain, total_samples);
 		ret += fprintf(fp, "\n");
 		if (++entries_printed == callchain_param.print_limit)
 			break;

 		rb_node = rb_next(rb_node);
 	}

 	return ret;
 }

 static size_t hist_entry_callchain__fprintf(struct hist_entry *he,
 					    u64 total_samples, int left_margin,
 					    FILE *fp)
 {
 	switch (callchain_param.mode) {
 	case CHAIN_GRAPH_REL:
 		return callchain__fprintf_graph(fp, &he->sorted_chain, he->stat.period,
 						left_margin);
 		break;
 	case CHAIN_GRAPH_ABS:
 		return callchain__fprintf_graph(fp, &he->sorted_chain, total_samples,
 						left_margin);
 		break;
 	case CHAIN_FLAT:
 		return callchain__fprintf_flat(fp, &he->sorted_chain, total_samples);
 		break;
 	case CHAIN_NONE:
 		break;
 	default:
 		pr_err("Bad callchain mode\n");
 	}

 	return 0;
 }

 static size_t hist_entry__callchain_fprintf(struct hist_entry *he,
 					    struct hists *hists,
 					    FILE *fp)
 {
 	int left_margin = 0;
 	u64 total_period = hists->stats.total_period;

 	if (sort__first_dimension == SORT_COMM) {
 		struct sort_entry *se = list_first_entry(&hist_entry__sort_list,
 							 typeof(*se), list);
 		left_margin = hists__col_len(hists, se->se_width_idx);
 		left_margin -= thread__comm_len(he->thread);
 	}

 	return hist_entry_callchain__fprintf(he, total_period, left_margin, fp);
 }

 static int hist_entry__period_snprintf(struct perf_hpp *hpp,
 				       struct hist_entry *he)
 {
 	const char *sep = symbol_conf.field_sep;
 	struct perf_hpp_fmt *fmt;
 	char *start = hpp->buf;
 	int ret;
 	bool first = true;

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

 	perf_hpp__for_each_format(fmt) {
 		/*
 		 * If there's no field_sep, we still need
 		 * to display initial '  '.
 		 */
 		if (!sep || !first) {
 			ret = scnprintf(hpp->buf, hpp->size, "%s", sep ?: "  ");
 			advance_hpp(hpp, ret);
 		} else
 			first = false;

 		if (perf_hpp__use_color() && fmt->color)
 			ret = fmt->color(fmt, hpp, he);
 		else
 			ret = fmt->entry(fmt, hpp, he);

 		advance_hpp(hpp, ret);
 	}

 	return hpp->buf - start;
 }

 static int hist_entry__fprintf(struct hist_entry *he, size_t size,
 			       struct hists *hists,
 			       char *bf, size_t bfsz, FILE *fp)
 {
 	int ret;
 	struct perf_hpp hpp = {
 		.buf		= bf,
 		.size		= size,
 	};

 	if (size == 0 || size > bfsz)
 		size = hpp.size = bfsz;

 	ret = hist_entry__period_snprintf(&hpp, he);
 	hist_entry__sort_snprintf(he, bf + ret, size - ret, hists);

 	ret = fprintf(fp, "%s\n", bf);

 	if (symbol_conf.use_callchain)
 		ret += hist_entry__callchain_fprintf(he, hists, fp);

 	return ret;
 }

 size_t hists__fprintf(struct hists *hists, bool show_header, int max_rows,
 		      int max_cols, float min_pcnt, FILE *fp)
 {
 	struct perf_hpp_fmt *fmt;
 	struct sort_entry *se;
 	struct rb_node *nd;
 	size_t ret = 0;
 	unsigned int width;
 	const char *sep = symbol_conf.field_sep;
 	const char *col_width = symbol_conf.col_width_list_str;
 	int nr_rows = 0;
 	char bf[96];
 	struct perf_hpp dummy_hpp = {
 		.buf	= bf,
 		.size	= sizeof(bf),
 	};
 	bool first = true;
 	size_t linesz;
 	char *line = NULL;

 	init_rem_hits();

 	if (!show_header)
 		goto print_entries;

 	fprintf(fp, "# ");

 	perf_hpp__for_each_format(fmt) {
 		if (!first)
 			fprintf(fp, "%s", sep ?: "  ");
 		else
 			first = false;

 		fmt->header(fmt, &dummy_hpp, hists_to_evsel(hists));
 		fprintf(fp, "%s", bf);
 	}

 	list_for_each_entry(se, &hist_entry__sort_list, list) {
 		if (se->elide)
 			continue;
 		if (sep) {
 			fprintf(fp, "%c%s", *sep, se->se_header);
 			continue;
 		}
 		width = strlen(se->se_header);
 		if (symbol_conf.col_width_list_str) {
 			if (col_width) {
 				hists__set_col_len(hists, se->se_width_idx,
 						   atoi(col_width));
 				col_width = strchr(col_width, ',');
 				if (col_width)
 					++col_width;
 			}
 		}
 		if (!hists__new_col_len(hists, se->se_width_idx, width))
 			width = hists__col_len(hists, se->se_width_idx);
 		fprintf(fp, "  %*s", width, se->se_header);
 	}

 	fprintf(fp, "\n");
 	if (max_rows && ++nr_rows >= max_rows)
 		goto out;

 	if (sep)
 		goto print_entries;

 	first = true;

 	fprintf(fp, "# ");

 	perf_hpp__for_each_format(fmt) {
 		unsigned int i;

 		if (!first)
 			fprintf(fp, "%s", sep ?: "  ");
 		else
 			first = false;

 		width = fmt->width(fmt, &dummy_hpp, hists_to_evsel(hists));
 		for (i = 0; i < width; i++)
 			fprintf(fp, ".");
 	}

 	list_for_each_entry(se, &hist_entry__sort_list, list) {
 		unsigned int i;

 		if (se->elide)
 			continue;

 		fprintf(fp, "  ");
 		width = hists__col_len(hists, se->se_width_idx);
 		if (width == 0)
 			width = strlen(se->se_header);
 		for (i = 0; i < width; i++)
 			fprintf(fp, ".");
 	}

 	fprintf(fp, "\n");
 	if (max_rows && ++nr_rows >= max_rows)
 		goto out;

 	fprintf(fp, "#\n");
 	if (max_rows && ++nr_rows >= max_rows)
 		goto out;

 print_entries:
 	linesz = hists__sort_list_width(hists) + 3 + 1;
 	linesz += perf_hpp__color_overhead();
 	line = malloc(linesz);
 	if (line == NULL) {
 		ret = -1;
 		goto out;
 	}

 	for (nd = rb_first(&hists->entries); nd; nd = rb_next(nd)) {
 		struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
 		float percent = h->stat.period * 100.0 /
 					hists->stats.total_period;

 		if (h->filtered)
 			continue;

 		if (percent < min_pcnt)
 			continue;

 		ret += hist_entry__fprintf(h, max_cols, hists, line, linesz, fp);

 		if (max_rows && ++nr_rows >= max_rows)
 			break;

 		if (h->ms.map == NULL && verbose > 1) {
 			__map_groups__fprintf_maps(&h->thread->mg,
 						   MAP__FUNCTION, verbose, fp);
 			fprintf(fp, "%.10s end\n", graph_dotted_line);
 		}
 	}

 	free(line);
 out:
 	zfree(&rem_sq_bracket);

 	return ret;
 }

 size_t events_stats__fprintf(struct events_stats *stats, FILE *fp)
 {
 	int i;
 	size_t ret = 0;

 	for (i = 0; i < PERF_RECORD_HEADER_MAX; ++i) {
 		const char *name;

 		if (stats->nr_events[i] == 0)
 			continue;

 		name = perf_event__name(i);
 		if (!strcmp(name, "UNKNOWN"))
 			continue;

 		ret += fprintf(fp, "%16s events: %10d\n", name,
 			       stats->nr_events[i]);
 	}

 	return ret;
 }
	#include <stdio.h>

	#include "../../util/util.h"
	#include "../../util/hist.h"
	#include "../../util/sort.h"
	#include "../../util/evsel.h"


	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 period,
	u64 total_samples, u64 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 (!period && 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->ms.sym)
	ret += fprintf(fp, "%s\n", chain->ms.sym->name);
	else
	ret += fprintf(fp, "0x%0" PRIx64 "\n", 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.ms.sym = rem_sq_bracket;
	}

	static size_t __callchain__fprintf_graph(FILE fp, struct rb_root root,
	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 remaining;
	size_t ret = 0;
	int i;
	uint entries_printed = 0;

	remaining = total_samples;

	node = rb_first(root);
	while (node) {
	u64 new_total;
	u64 cumul;

	child = rb_entry(node, struct callchain_node, rb_node);
	cumul = callchain_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 separator
	* 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) {
	ret += ipchain__fprintf_graph(fp, chain, depth,
	new_depth_mask, i++,
	total_samples,
	cumul,
	left_margin);
	}

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

	ret += __callchain__fprintf_graph(fp, &child->rb_root, new_total,
	depth + 1,
	new_depth_mask \| (1 << depth),
	left_margin);
	node = next;
	if (++entries_printed == callchain_param.print_limit)
	break;
	}

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

	if (!rem_sq_bracket)
	return ret;

	new_depth_mask &= ~(1 << (depth - 1));
	ret += ipchain__fprintf_graph(fp, &rem_hits, depth,
	new_depth_mask, 0, total_samples,
	remaining, left_margin);
	}

	return ret;
	}

	static size_t callchain__fprintf_graph(FILE fp, struct rb_root root,
	u64 total_samples, int left_margin)
	{
	struct callchain_node *cnode;
	struct callchain_list *chain;
	u32 entries_printed = 0;
	bool printed = false;
	struct rb_node *node;
	int i = 0;
	int ret = 0;

	/*
	* If have one single callchain root, don't bother printing
	* its percentage (100 % in fractal mode and the same percentage
	* than the hist in graph mode). This also avoid one level of column.
	*/
	node = rb_first(root);
	if (node && !rb_next(node)) {
	cnode = rb_entry(node, struct callchain_node, rb_node);
	list_for_each_entry(chain, &cnode->val, list) {
	/*
	* If we sort by symbol, the first entry is the same than
	* the symbol. No need to print it otherwise it appears as
	* displayed twice.
	*/
	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->ms.sym)
	ret += fprintf(fp, " %s\n", chain->ms.sym->name);
	else
	ret += fprintf(fp, " %p\n", (void *)(long)chain->ip);

	if (++entries_printed == callchain_param.print_limit)
	break;
	}
	root = &cnode->rb_root;
	}

	ret += __callchain__fprintf_graph(fp, root, total_samples,
	1, 1, left_margin);
	ret += fprintf(fp, "\n");

	return ret;
	}

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

	if (!node)
	return 0;

	ret += __callchain__fprintf_flat(fp, node->parent, total_samples);


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

	return ret;
	}

	static size_t callchain__fprintf_flat(FILE fp, struct rb_root tree,
	u64 total_samples)
	{
	size_t ret = 0;
	u32 entries_printed = 0;
	struct callchain_node *chain;
	struct rb_node *rb_node = rb_first(tree);

	while (rb_node) {
	double percent;

	chain = rb_entry(rb_node, struct callchain_node, rb_node);
	percent = chain->hit * 100.0 / total_samples;

	ret = percent_color_fprintf(fp, " %6.2f%%\n", percent);
	ret += __callchain__fprintf_flat(fp, chain, total_samples);
	ret += fprintf(fp, "\n");
	if (++entries_printed == callchain_param.print_limit)
	break;

	rb_node = rb_next(rb_node);
	}

	return ret;
	}

	static size_t hist_entry_callchain__fprintf(struct hist_entry *he,
	u64 total_samples, int left_margin,
	FILE *fp)
	{
	switch (callchain_param.mode) {
	case CHAIN_GRAPH_REL:
	return callchain__fprintf_graph(fp, &he->sorted_chain, he->stat.period,
	left_margin);
	break;
	case CHAIN_GRAPH_ABS:
	return callchain__fprintf_graph(fp, &he->sorted_chain, total_samples,
	left_margin);
	break;
	case CHAIN_FLAT:
	return callchain__fprintf_flat(fp, &he->sorted_chain, total_samples);
	break;
	case CHAIN_NONE:
	break;
	default:
	pr_err("Bad callchain mode\n");
	}

	return 0;
	}

	static size_t hist_entry__callchain_fprintf(struct hist_entry *he,
	struct hists *hists,
	FILE *fp)
	{
	int left_margin = 0;
	u64 total_period = hists->stats.total_period;

	if (sort__first_dimension == SORT_COMM) {
	struct sort_entry *se = list_first_entry(&hist_entry__sort_list,
	typeof(*se), list);
	left_margin = hists__col_len(hists, se->se_width_idx);
	left_margin -= thread__comm_len(he->thread);
	}

	return hist_entry_callchain__fprintf(he, total_period, left_margin, fp);
	}

	static int hist_entry__period_snprintf(struct perf_hpp *hpp,
	struct hist_entry *he)
	{
	const char *sep = symbol_conf.field_sep;
	struct perf_hpp_fmt *fmt;
	char *start = hpp->buf;
	int ret;
	bool first = true;

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

	perf_hpp__for_each_format(fmt) {
	/*
	* If there's no field_sep, we still need
	* to display initial ' '.
	*/
	if (!sep \|\| !first) {
	ret = scnprintf(hpp->buf, hpp->size, "%s", sep ?: " ");
	advance_hpp(hpp, ret);
	} else
	first = false;

	if (perf_hpp__use_color() && fmt->color)
	ret = fmt->color(fmt, hpp, he);
	else
	ret = fmt->entry(fmt, hpp, he);

	advance_hpp(hpp, ret);
	}

	return hpp->buf - start;
	}

	static int hist_entry__fprintf(struct hist_entry *he, size_t size,
	struct hists *hists,
	char bf, size_t bfsz, FILE fp)
	{
	int ret;
	struct perf_hpp hpp = {
	.buf = bf,
	.size = size,
	};

	if (size == 0 \|\| size > bfsz)
	size = hpp.size = bfsz;

	ret = hist_entry__period_snprintf(&hpp, he);
	hist_entry__sort_snprintf(he, bf + ret, size - ret, hists);

	ret = fprintf(fp, "%s\n", bf);

	if (symbol_conf.use_callchain)
	ret += hist_entry__callchain_fprintf(he, hists, fp);

	return ret;
	}

	size_t hists__fprintf(struct hists *hists, bool show_header, int max_rows,
	int max_cols, float min_pcnt, FILE *fp)
	{
	struct perf_hpp_fmt *fmt;
	struct sort_entry *se;
	struct rb_node *nd;
	size_t ret = 0;
	unsigned int width;
	const char *sep = symbol_conf.field_sep;
	const char *col_width = symbol_conf.col_width_list_str;
	int nr_rows = 0;
	char bf[96];
	struct perf_hpp dummy_hpp = {
	.buf = bf,
	.size = sizeof(bf),
	};
	bool first = true;
	size_t linesz;
	char *line = NULL;

	init_rem_hits();

	if (!show_header)
	goto print_entries;

	fprintf(fp, "# ");

	perf_hpp__for_each_format(fmt) {
	if (!first)
	fprintf(fp, "%s", sep ?: " ");
	else
	first = false;

	fmt->header(fmt, &dummy_hpp, hists_to_evsel(hists));
	fprintf(fp, "%s", bf);
	}

	list_for_each_entry(se, &hist_entry__sort_list, list) {
	if (se->elide)
	continue;
	if (sep) {
	fprintf(fp, "%c%s", *sep, se->se_header);
	continue;
	}
	width = strlen(se->se_header);
	if (symbol_conf.col_width_list_str) {
	if (col_width) {
	hists__set_col_len(hists, se->se_width_idx,
	atoi(col_width));
	col_width = strchr(col_width, ',');
	if (col_width)
	++col_width;
	}
	}
	if (!hists__new_col_len(hists, se->se_width_idx, width))
	width = hists__col_len(hists, se->se_width_idx);
	fprintf(fp, " %*s", width, se->se_header);
	}

	fprintf(fp, "\n");
	if (max_rows && ++nr_rows >= max_rows)
	goto out;

	if (sep)
	goto print_entries;

	first = true;

	fprintf(fp, "# ");

	perf_hpp__for_each_format(fmt) {
	unsigned int i;

	if (!first)
	fprintf(fp, "%s", sep ?: " ");
	else
	first = false;

	width = fmt->width(fmt, &dummy_hpp, hists_to_evsel(hists));
	for (i = 0; i < width; i++)
	fprintf(fp, ".");
	}

	list_for_each_entry(se, &hist_entry__sort_list, list) {
	unsigned int i;

	if (se->elide)
	continue;

	fprintf(fp, " ");
	width = hists__col_len(hists, se->se_width_idx);
	if (width == 0)
	width = strlen(se->se_header);
	for (i = 0; i < width; i++)
	fprintf(fp, ".");
	}

	fprintf(fp, "\n");
	if (max_rows && ++nr_rows >= max_rows)
	goto out;

	fprintf(fp, "#\n");
	if (max_rows && ++nr_rows >= max_rows)
	goto out;

	print_entries:
	linesz = hists__sort_list_width(hists) + 3 + 1;
	linesz += perf_hpp__color_overhead();
	line = malloc(linesz);
	if (line == NULL) {
	ret = -1;
	goto out;
	}

	for (nd = rb_first(&hists->entries); nd; nd = rb_next(nd)) {
	struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
	float percent = h->stat.period * 100.0 /
	hists->stats.total_period;

	if (h->filtered)
	continue;

	if (percent < min_pcnt)
	continue;

	ret += hist_entry__fprintf(h, max_cols, hists, line, linesz, fp);

	if (max_rows && ++nr_rows >= max_rows)
	break;

	if (h->ms.map == NULL && verbose > 1) {
	__map_groups__fprintf_maps(&h->thread->mg,
	MAP__FUNCTION, verbose, fp);
	fprintf(fp, "%.10s end\n", graph_dotted_line);
	}
	}

	free(line);
	out:
	zfree(&rem_sq_bracket);

	return ret;
	}

	size_t events_stats__fprintf(struct events_stats stats, FILE fp)
	{
	int i;
	size_t ret = 0;

	for (i = 0; i < PERF_RECORD_HEADER_MAX; ++i) {
	const char *name;

	if (stats->nr_events[i] == 0)
	continue;

	name = perf_event__name(i);
	if (!strcmp(name, "UNKNOWN"))
	continue;

	ret += fprintf(fp, "%16s events: %10d\n", name,
	stats->nr_events[i]);
	}

	return ret;
	}