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/*
* Copyright (C) Colin Ian King 2015-2026
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#ifndef __PERF_H__
#define __PERF_H__
#define _GNU_SOURCE
#include <stdint.h>
#include <stdbool.h>
#include <string.h>
#include <unistd.h>
#include <sys/syscall.h>
#if defined(__linux__) && defined(__NR_perf_event_open)
#define PERF_ENABLED
#endif
enum {
PERF_TP_PAGE_FAULT_USER = 0,
PERF_TP_PAGE_FAULT_KERNEL,
PERF_TP_MM_PAGE_ALLOC,
PERF_TP_MM_PAGE_FREE,
PERF_MAX
};
/* per perf counter info */
typedef struct {
uint64_t counter; /* perf counter */
bool valid; /* is it valid */
int fd; /* perf per counter fd */
} perf_stat_t;
typedef struct {
perf_stat_t perf_stat[PERF_MAX];/* perf counters */
int perf_opened; /* count of opened counters */
} perf_t;
/* used for table of perf events to gather */
typedef struct {
int id; /* stress-ng perf ID */
unsigned long type; /* perf types */
unsigned long config; /* perf type specific config */
} perf_info_t;
/* perf trace point id -> path resolution */
typedef struct {
int id; /* stress-ng perf ID */
char *path; /* path to config value */
} perf_tp_info_t;
/* perf data */
typedef struct {
uint64_t counter; /* perf counter */
uint64_t time_enabled; /* perf time enabled */
uint64_t time_running; /* perf time running */
} perf_data_t;
extern int perf_start(perf_t *p, const pid_t pid);
extern int perf_stop(perf_t *p);
extern uint64_t perf_counter(const perf_t *p, const int id);
#endif
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