path: root/tools/perf/ui/hist.c

// SPDX-License-Identifier: GPL-2.0
#include <inttypes.h>
#include <math.h>
#include <stdlib.h>
#include <string.h>
#include <linux/compiler.h>

#include "../util/callchain.h"
#include "../util/debug.h"
#include "../util/hist.h"
#include "../util/sort.h"
#include "../util/evsel.h"
#include "../util/evlist.h"
#include "../util/thread.h"
#include "../util/util.h"

/* hist period print (hpp) functions */

#define hpp__call_print_fn(hpp, fn, fmt, ...)			\
({								\
	int __ret = fn(hpp, fmt, ##__VA_ARGS__);		\
	advance_hpp(hpp, __ret);				\
	__ret;							\
})

static int __hpp__fmt(struct perf_hpp *hpp, struct hist_entry *he,
		      hpp_field_fn get_field, const char *fmt, int len,
		      hpp_snprint_fn print_fn, enum perf_hpp_fmt_type fmtype)
{
	int ret;
	struct hists *hists = he->hists;
	struct evsel *evsel = hists_to_evsel(hists);
	char *buf = hpp->buf;
	size_t size = hpp->size;

	if (fmtype == PERF_HPP_FMT_TYPE__PERCENT) {
		double percent = 0.0;
		u64 total = hists__total_period(hists);

		if (total)
			percent = 100.0 * get_field(he) / total;

		ret = hpp__call_print_fn(hpp, print_fn, fmt, len, percent);
	} else if (fmtype == PERF_HPP_FMT_TYPE__AVERAGE) {
		double average = 0;

		if (he->stat.nr_events)
			average = 1.0 * get_field(he) / he->stat.nr_events;

		ret = hpp__call_print_fn(hpp, print_fn, fmt, len, average);
	} else {
		ret = hpp__call_print_fn(hpp, print_fn, fmt, len, get_field(he));
	}

	if (evsel__is_group_event(evsel)) {
		int prev_idx, idx_delta;
		struct hist_entry *pair;
		int nr_members = evsel->core.nr_members;

		prev_idx = evsel__group_idx(evsel);

		list_for_each_entry(pair, &he->pairs.head, pairs.node) {
			u64 period = get_field(pair);
			u64 total = hists__total_period(pair->hists);
			int nr_samples = pair->stat.nr_events;

			if (!total)
				continue;

			evsel = hists_to_evsel(pair->hists);
			idx_delta = evsel__group_idx(evsel) - prev_idx - 1;

			while (idx_delta--) {
				/*
				 * zero-fill group members in the middle which
				 * have no sample
				 */
				if (fmtype != PERF_HPP_FMT_TYPE__RAW) {
					ret += hpp__call_print_fn(hpp, print_fn,
								  fmt, len, 0.0);
				} else {
					ret += hpp__call_print_fn(hpp, print_fn,
								  fmt, len, 0ULL);
				}
			}

			if (fmtype == PERF_HPP_FMT_TYPE__PERCENT) {
				ret += hpp__call_print_fn(hpp, print_fn, fmt, len,
							  100.0 * period / total);
			} else if (fmtype == PERF_HPP_FMT_TYPE__AVERAGE) {
				double avg = nr_samples ? (period / nr_samples) : 0;

				ret += hpp__call_print_fn(hpp, print_fn, fmt,
							  len, avg);
			} else {
				ret += hpp__call_print_fn(hpp, print_fn, fmt,
							  len, period);
			}

			prev_idx = evsel__group_idx(evsel);
		}

		idx_delta = nr_members - prev_idx - 1;

		while (idx_delta--) {
			/*
			 * zero-fill group members at last which have no sample
			 */
			if (fmtype != PERF_HPP_FMT_TYPE__RAW) {
				ret += hpp__call_print_fn(hpp, print_fn,
							  fmt, len, 0.0);
			} else {
				ret += hpp__call_print_fn(hpp, print_fn,
							  fmt, len, 0ULL);
			}
		}
	}

	/*
	 * Restore original buf and size as it's where caller expects
	 * the result will be saved.
	 */
	hpp->buf = buf;
	hpp->size = size;

	return ret;
}

int hpp__fmt(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
	     struct hist_entry *he, hpp_field_fn get_field,
	     const char *fmtstr, hpp_snprint_fn print_fn,
	     enum perf_hpp_fmt_type fmtype)
{
	int len =