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

/*
 * builtin-timechart.c - make an svg timechart of system activity
 *
 * (C) Copyright 2009 Intel Corporation
 *
 * Authors:
 *     Arjan van de Ven <arjan@linux.intel.com>
 *
 * 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; version 2
 * of the License.
 */

#include "builtin.h"

#include "util/util.h"

#include "util/color.h"
#include <linux/list.h>
#include "util/cache.h"
#include "util/evsel.h"
#include <linux/rbtree.h>
#include "util/symbol.h"
#include "util/callchain.h"
#include "util/strlist.h"

#include "perf.h"
#include "util/header.h"
#include "util/parse-options.h"
#include "util/parse-events.h"
#include "util/event.h"
#include "util/session.h"
#include "util/svghelper.h"
#include "util/tool.h"

#define SUPPORT_OLD_POWER_EVENTS 1
#define PWR_EVENT_EXIT -1


static unsigned int	numcpus;
static u64		min_freq;	/* Lowest CPU frequency seen */
static u64		max_freq;	/* Highest CPU frequency seen */
static u64		turbo_frequency;

static u64		first_time, last_time;

static bool		power_only;


struct per_pid;
struct per_pidcomm;

struct cpu_sample;
struct power_event;
struct wake_event;

struct sample_wrapper;

/*
 * Datastructure layout:
 * We keep an list of "pid"s, matching the kernels notion of a task struct.
 * Each "pid" entry, has a list of "comm"s.
 *	this is because we want to track different programs different, while
 *	exec will reuse the original pid (by design).
 * Each comm has a list of samples that will be used to draw
 * final graph.
 */

struct per_pid {
	struct per_pid *next;

	int		pid;
	int		ppid;

	u64		start_time;
	u64		end_time;
	u64		total_time;
	int		display;

	struct per_pidcomm *all;
	struct per_pidcomm *current;
};


struct per_pidcomm {
	struct per_pidcomm *next;

	u64		start_time;
	u64		end_time;
	u64		total_time;

	int		Y;
	int		display;

	long		state;
	u64		state_since;

	char		*comm;

	struct cpu_sample *samples;
};

struct sample_wrapper {
	struct sample_wrapper *next;

	u64		timestamp;
	unsigned char	data[0];
};

#define TYPE_NONE	0
#define TYPE_RUNNING	1
#define TYPE_WAITING	2
#define TYPE_BLOCKED	3

struct cpu_sample {
	struct cpu_sample *next;

	u64 start_time;
	u64 end_time;
	int type;
	int cpu;
};

static struct per_pid *all_data;

#define CSTATE 1
#define PSTATE 2

struct power_event {
	struct power_event *next;
	int type;
	int state;
	u64 start_time;
	u64 end_time;
	int cpu;
};

struct wake_event {
	struct wake_event *next;
	int waker;
	int wakee;
	u64 time;
};

static struct power_event    *power_events;
static struct wake_event     *wake_events;

struct process_filter;
struct process_filter {
	char			*name;
	int			pid;
	struct process_filter	*next;
};

static struct process_filter *process_filter;


static struct per_pid *find_create_pid(int pid)
{
	struct per_pid *cursor = all_data;

	while (cursor) {
		if (cursor->pid == pid)
			return cursor;
		cursor = cursor->next;
	}
	cursor = zalloc(sizeof(*cursor));
	assert(cursor != NULL);
	cursor->pid = pid;
	cursor->next = all_data;
	all_data = cursor;
	return cursor;
}

static void pid_set_comm(int pid, char *comm)
{
	struct per_pid *p;
	struct per_pidcomm *c;
	p = find_create_pid(pid);
	c = p->all;
	while (c) {
		if (c->comm && strcmp(c->comm, comm) == 0) {
			p->current = c;
			return;
		}
		if (!c->comm) {
			c->comm = strdup(comm);
			p->current = c;
			return;
		}
		c = c->next;
	}
	c = zalloc(sizeof(*c));
	assert(c != NULL);
	c->comm = strdup(comm);
	p->current = c;
	c->next = p->all;
	p->all = c;
}

static void pid_fork(int pid, int ppid, u64 timestamp)
{
	struct per_pid *p, *pp;
	p = find_create_pid(pid);
	pp = find_create_pid(ppid);
	p->ppid = ppid;
	if (pp->current && pp->current->comm && !p->current)
		pid_set_comm(pid, pp->current->comm);

	p->start_time = timestamp