path: root/tools/perf/builtin-top.c

/*
 * builtin-top.c
 *
 * Builtin top command: Display a continuously updated profile of
 * any workload, CPU or specific PID.
 *
 * Copyright (C) 2008, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
 *
 * Improvements and fixes by:
 *
 *   Arjan van de Ven <arjan@linux.intel.com>
 *   Yanmin Zhang <yanmin.zhang@intel.com>
 *   Wu Fengguang <fengguang.wu@intel.com>
 *   Mike Galbraith <efault@gmx.de>
 *   Paul Mackerras <paulus@samba.org>
 *
 * Released under the GPL v2. (and only v2, not any later version)
 */
#include "builtin.h"

#include "perf.h"

#include "util/symbol.h"
#include "util/color.h"
#include "util/util.h"
#include <linux/rbtree.h>
#include "util/parse-options.h"
#include "util/parse-events.h"

#include <assert.h>
#include <fcntl.h>

#include <stdio.h>
#include <termios.h>
#include <unistd.h>

#include <errno.h>
#include <time.h>
#include <sched.h>
#include <pthread.h>

#include <sys/syscall.h>
#include <sys/ioctl.h>
#include <sys/poll.h>
#include <sys/prctl.h>
#include <sys/wait.h>
#include <sys/uio.h>
#include <sys/mman.h>

#include <linux/unistd.h>
#include <linux/types.h>

static int			fd[MAX_NR_CPUS][MAX_COUNTERS];

static int			system_wide			=  0;

static int			default_interval		= 100000;

static int			count_filter			=  5;
static int			print_entries			= 15;

static int			target_pid			= -1;
static int			inherit				=  0;
static int			profile_cpu			= -1;
static int			nr_cpus				=  0;
static unsigned int		realtime_prio			=  0;
static int			group				=  0;
static unsigned int		page_size;
static unsigned int		mmap_pages			= 16;
static int			freq				=  0;
static int			verbose				=  0;
static char			*vmlinux			=  NULL;

static int			delay_secs			=  2;
static int			zero;
static int			dump_symtab;

/*
 * Source
 */

struct source_line {
	u64			eip;
	unsigned long		count[MAX_COUNTERS];
	char			*line;
	struct source_line	*next;
};

static char			*sym_filter			=  NULL;
struct sym_entry		*sym_filter_entry		=  NULL;
static int			sym_pcnt_filter			=  5;
static int			sym_counter			=  0;

/*
 * Symbols
 */

static u64			min_ip;
static u64			max_ip = -1ll;

struct sym_entry {
	struct rb_node		rb_node;
	struct list_head	node;
	unsigned long		count[MAX_COUNTERS];
	unsigned long		snap_count;
	double			weight;
	int			skip;
	struct source_line	*source;
	struct source_line	*lines;
	struct source_line	**lines_tail;
	pthread_mutex_t		source_lock;
};

/*
 * Source functions
 */

static void parse_source(struct sym_entry *syme)
{
	struct symbol *sym;
	struct module *module;
	struct section *section = NULL;
	FILE *file;
	char command[PATH_MAX*2], *path = vmlinux;
	u64 start, end, len;

	if (!syme)
		return;

	if (syme->lines) {
		pthread_mutex_lock(&syme->source_lock);
		goto out_assign;
	}

	sym = (struct symbol *)(syme + 1);
	module = sym->module