void bacct_add_tsk(struct taskstats *stats, struct task_struct *tsk)
{
	const struct cred *tcred;
	struct timespec uptime, ts;
	u64 ac_etime;

	BUILD_BUG_ON(TS_COMM_LEN < TASK_COMM_LEN);

	
	do_posix_clock_monotonic_gettime(&uptime);
	ts = timespec_sub(uptime, tsk->start_time);
	
	ac_etime = timespec_to_ns(&ts);
	do_div(ac_etime, NSEC_PER_USEC);
	stats->ac_etime = ac_etime;
	stats->ac_btime = get_seconds() - ts.tv_sec;
	if (thread_group_leader(tsk)) {
		stats->ac_exitcode = tsk->exit_code;
		if (tsk->flags & PF_FORKNOEXEC)
			stats->ac_flag |= AFORK;
	}
	if (tsk->flags & PF_SUPERPRIV)
		stats->ac_flag |= ASU;
	if (tsk->flags & PF_DUMPCORE)
		stats->ac_flag |= ACORE;
	if (tsk->flags & PF_SIGNALED)
		stats->ac_flag |= AXSIG;
	stats->ac_nice	 = task_nice(tsk);
	stats->ac_sched	 = tsk->policy;
	stats->ac_pid	 = tsk->pid;
	rcu_read_lock();
	tcred = __task_cred(tsk);
	stats->ac_uid	 = tcred->uid;
	stats->ac_gid	 = tcred->gid;
	stats->ac_ppid	 = pid_alive(tsk) ?
				rcu_dereference(tsk->real_parent)->tgid : 0;
	rcu_read_unlock();
	stats->ac_utime = cputime_to_usecs(tsk->utime);
	stats->ac_stime = cputime_to_usecs(tsk->stime);
	stats->ac_utimescaled = cputime_to_usecs(tsk->utimescaled);
	stats->ac_stimescaled = cputime_to_usecs(tsk->stimescaled);
	stats->ac_minflt = tsk->min_flt;
	stats->ac_majflt = tsk->maj_flt;

	strncpy(stats->ac_comm, tsk->comm, sizeof(stats->ac_comm));
}
static inline u64 get_cpu_idle_time_jiffy(unsigned int cpu, u64 *wall)
{
    u64 idle_time;
    u64 cur_wall_time;
    u64 busy_time;

    cur_wall_time = jiffies64_to_cputime64(get_jiffies_64());

    busy_time = kcpustat_cpu(cpu).cpustat[CPUTIME_USER];
    busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_SYSTEM];
    busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_IRQ];
    busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_SOFTIRQ];
    busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_STEAL];
    busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_NICE];

    idle_time = cur_wall_time - busy_time;
    if (wall)
        *wall = cputime_to_usecs(cur_wall_time);

    return cputime_to_usecs(idle_time);
}
示例#3
0
void acct_update_power(struct task_struct *task, cputime_t cputime) {
	struct cpufreq_power_stats *powerstats;
	struct cpufreq_stats *stats;
	unsigned int cpu_num, curr;

	if (!task)
		return;
	cpu_num = task_cpu(task);
	powerstats = per_cpu(cpufreq_power_stats, cpu_num);
	stats = per_cpu(cpufreq_stats_table, cpu_num);
	if (!powerstats || !stats)
		return;

	curr = powerstats->curr[stats->last_index];
	task->cpu_power += curr * cputime_to_usecs(cputime);
}