* bump this up when changing the output format or the meaning of an existing
* format, so that tools can adapt (or abort)
*/
-#define SCHEDSTAT_VERSION 14
+#define SCHEDSTAT_VERSION 15
static int show_schedstat(struct seq_file *seq, void *v)
{
int cpu;
- int mask_len = NR_CPUS/32 * 9;
+ int mask_len = DIV_ROUND_UP(NR_CPUS, 32) * 9;
char *mask_str = kmalloc(mask_len, GFP_KERNEL);
if (mask_str == NULL)
/* runqueue-specific stats */
seq_printf(seq,
- "cpu%d %u %u %u %u %u %u %u %u %u %llu %llu %lu",
- cpu, rq->yld_both_empty,
- rq->yld_act_empty, rq->yld_exp_empty, rq->yld_count,
+ "cpu%d %u %u %u %u %u %u %llu %llu %lu",
+ cpu, rq->yld_count,
rq->sched_switch, rq->sched_count, rq->sched_goidle,
rq->ttwu_count, rq->ttwu_local,
- rq->rq_sched_info.cpu_time,
+ rq->rq_cpu_time,
rq->rq_sched_info.run_delay, rq->rq_sched_info.pcount);
seq_printf(seq, "\n");
for_each_domain(cpu, sd) {
enum cpu_idle_type itype;
- cpumask_scnprintf(mask_str, mask_len, sd->span);
+ cpumask_scnprintf(mask_str, mask_len,
+ sched_domain_span(sd));
seq_printf(seq, "domain%d %s", dcount++, mask_str);
for (itype = CPU_IDLE; itype < CPU_MAX_IDLE_TYPES;
itype++) {
return res;
}
-const struct file_operations proc_schedstat_operations = {
+static const struct file_operations proc_schedstat_operations = {
.open = schedstat_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
+static int __init proc_schedstat_init(void)
+{
+ proc_create("schedstat", 0, NULL, &proc_schedstat_operations);
+ return 0;
+}
+module_init(proc_schedstat_init);
+
/*
* Expects runqueue lock to be held for atomicity of update
*/
rq_sched_info_depart(struct rq *rq, unsigned long long delta)
{
if (rq)
- rq->rq_sched_info.cpu_time += delta;
+ rq->rq_cpu_time += delta;
}
static inline void
unsigned long long delta = task_rq(t)->clock -
t->sched_info.last_arrival;
- t->sched_info.cpu_time += delta;
rq_sched_info_depart(task_rq(t), delta);
if (t->state == TASK_RUNNING)
* on CONFIG_SCHEDSTATS.
*/
-#ifdef CONFIG_SMP
-
/**
- * thread_group_cputime_account_user - Maintain utime for a thread group.
+ * account_group_user_time - Maintain utime for a thread group.
*
- * @tgtimes: Pointer to thread_group_cputime structure.
- * @cputime: Time value by which to increment the utime field of that
- * structure.
+ * @tsk: Pointer to task structure.
+ * @cputime: Time value by which to increment the utime field of the
+ * thread_group_cputime structure.
*
* If thread group time is being maintained, get the structure for the
* running CPU and update the utime field there.
*/
-static inline void thread_group_cputime_account_user(
- struct thread_group_cputime *tgtimes,
- cputime_t cputime)
+static inline void account_group_user_time(struct task_struct *tsk,
+ cputime_t cputime)
{
- if (tgtimes->totals) {
- struct task_cputime *times;
+ struct thread_group_cputimer *cputimer;
- times = per_cpu_ptr(tgtimes->totals, get_cpu());
- times->utime = cputime_add(times->utime, cputime);
- put_cpu_no_resched();
- }
+ /* tsk == current, ensure it is safe to use ->signal */
+ if (unlikely(tsk->exit_state))
+ return;
+
+ cputimer = &tsk->signal->cputimer;
+
+ if (!cputimer->running)
+ return;
+
+ spin_lock(&cputimer->lock);
+ cputimer->cputime.utime =
+ cputime_add(cputimer->cputime.utime, cputime);
+ spin_unlock(&cputimer->lock);
}
/**
- * thread_group_cputime_account_system - Maintain stime for a thread group.
+ * account_group_system_time - Maintain stime for a thread group.
*
- * @tgtimes: Pointer to thread_group_cputime structure.
- * @cputime: Time value by which to increment the stime field of that
- * structure.
+ * @tsk: Pointer to task structure.
+ * @cputime: Time value by which to increment the stime field of the
+ * thread_group_cputime structure.
*
* If thread group time is being maintained, get the structure for the
* running CPU and update the stime field there.
*/
-static inline void thread_group_cputime_account_system(
- struct thread_group_cputime *tgtimes,
- cputime_t cputime)
+static inline void account_group_system_time(struct task_struct *tsk,
+ cputime_t cputime)
{
- if (tgtimes->totals) {
- struct task_cputime *times;
+ struct thread_group_cputimer *cputimer;
- times = per_cpu_ptr(tgtimes->totals, get_cpu());
- times->stime = cputime_add(times->stime, cputime);
- put_cpu_no_resched();
- }
+ /* tsk == current, ensure it is safe to use ->signal */
+ if (unlikely(tsk->exit_state))
+ return;
+
+ cputimer = &tsk->signal->cputimer;
+
+ if (!cputimer->running)
+ return;
+
+ spin_lock(&cputimer->lock);
+ cputimer->cputime.stime =
+ cputime_add(cputimer->cputime.stime, cputime);
+ spin_unlock(&cputimer->lock);
}
/**
- * thread_group_cputime_account_exec_runtime - Maintain exec runtime for a
- * thread group.
+ * account_group_exec_runtime - Maintain exec runtime for a thread group.
*
- * @tgtimes: Pointer to thread_group_cputime structure.
+ * @tsk: Pointer to task structure.
* @ns: Time value by which to increment the sum_exec_runtime field
- * of that structure.
+ * of the thread_group_cputime structure.
*
* If thread group time is being maintained, get the structure for the
* running CPU and update the sum_exec_runtime field there.
*/
-static inline void thread_group_cputime_account_exec_runtime(
- struct thread_group_cputime *tgtimes,
- unsigned long long ns)
-{
- if (tgtimes->totals) {
- struct task_cputime *times;
-
- times = per_cpu_ptr(tgtimes->totals, get_cpu());
- times->sum_exec_runtime += ns;
- put_cpu_no_resched();
- }
-}
-
-#else /* CONFIG_SMP */
-
-static inline void thread_group_cputime_account_user(
- struct thread_group_cputime *tgtimes,
- cputime_t cputime)
-{
- tgtimes->totals->utime = cputime_add(tgtimes->totals->utime, cputime);
-}
-
-static inline void thread_group_cputime_account_system(
- struct thread_group_cputime *tgtimes,
- cputime_t cputime)
-{
- tgtimes->totals->stime = cputime_add(tgtimes->totals->stime, cputime);
-}
-
-static inline void thread_group_cputime_account_exec_runtime(
- struct thread_group_cputime *tgtimes,
- unsigned long long ns)
-{
- tgtimes->totals->sum_exec_runtime += ns;
-}
-
-#endif /* CONFIG_SMP */
-
-/*
- * These are the generic time-accounting routines that use the above
- * functions. They are the functions actually called by the scheduler.
- */
-static inline void account_group_user_time(struct task_struct *tsk,
- cputime_t cputime)
+static inline void account_group_exec_runtime(struct task_struct *tsk,
+ unsigned long long ns)
{
+ struct thread_group_cputimer *cputimer;
struct signal_struct *sig;
sig = tsk->signal;
- if (likely(sig))
- thread_group_cputime_account_user(&sig->cputime, cputime);
-}
+ /* see __exit_signal()->task_rq_unlock_wait() */
+ barrier();
+ if (unlikely(!sig))
+ return;
-static inline void account_group_system_time(struct task_struct *tsk,
- cputime_t cputime)
-{
- struct signal_struct *sig;
+ cputimer = &sig->cputimer;
- sig = tsk->signal;
- if (likely(sig))
- thread_group_cputime_account_system(&sig->cputime, cputime);
-}
+ if (!cputimer->running)
+ return;
-static inline void account_group_exec_runtime(struct task_struct *tsk,
- unsigned long long ns)
-{
- struct signal_struct *sig;
-
- sig = tsk->signal;
- if (likely(sig))
- thread_group_cputime_account_exec_runtime(&sig->cputime, ns);
+ spin_lock(&cputimer->lock);
+ cputimer->cputime.sum_exec_runtime += ns;
+ spin_unlock(&cputimer->lock);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff