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Commit 172ba844 authored by Balbir Singh's avatar Balbir Singh Committed by Ingo Molnar
Browse files

sched: update delay-accounting to use CFS's precise stats 



update delay-accounting to use CFS's precise stats.

Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent b27f03d4

fs/proc/base.c

+1 −1
Original line number Diff line number Diff line
@@ -296,7 +296,7 @@ static int proc_pid_wchan(struct task_struct *task, char *buffer) 
 */

static int proc_pid_schedstat(struct task_struct *task, char *buffer)

{

	return sprintf(buffer, "%lu %lu %lu\n",

	return sprintf(buffer, "%llu %llu %lu\n",

			task->sched_info.cpu_time,

			task->sched_info.run_delay,

			task->sched_info.pcnt);

include/linux/sched.h

+5 −5
Original line number Diff line number Diff line
@@ -562,12 +562,12 @@ struct reclaim_state; 
#if defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT)

struct sched_info {

	/* cumulative counters */

	unsigned long	cpu_time,	/* time spent on the cpu */

			run_delay,	/* time spent waiting on a runqueue */

			pcnt;		/* # of timeslices run on this cpu */

	unsigned long pcnt;	      /* # of times run on this cpu */

	unsigned long long cpu_time,  /* time spent on the cpu */

			   run_delay; /* time spent waiting on a runqueue */



	/* timestamps */

	unsigned long	last_arrival,	/* when we last ran on a cpu */

	unsigned long long last_arrival,/* when we last ran on a cpu */

			   last_queued;	/* when we were last queued to run */

};

#endif /* defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT) */

kernel/delayacct.c

+5 −5
Original line number Diff line number Diff line
@@ -99,9 +99,10 @@ void __delayacct_blkio_end(void) 
int __delayacct_add_tsk(struct taskstats *d, struct task_struct *tsk)

{

	s64 tmp;

	struct timespec ts;

	unsigned long t1,t2,t3;

	unsigned long t1;

	unsigned long long t2, t3;

	unsigned long flags;

	struct timespec ts;



	/* Though tsk->delays accessed later, early exit avoids

	 * unnecessary returning of other data
@@ -124,11 +125,10 @@ int __delayacct_add_tsk(struct taskstats *d, struct task_struct *tsk) 


	d->cpu_count += t1;



	jiffies_to_timespec(t2, &ts);

	tmp = (s64)d->cpu_delay_total + timespec_to_ns(&ts);

	tmp = (s64)d->cpu_delay_total + t2;

	d->cpu_delay_total = (tmp < (s64)d->cpu_delay_total) ? 0 : tmp;



	tmp = (s64)d->cpu_run_virtual_total + (s64)jiffies_to_usecs(t3) * 1000;

	tmp = (s64)d->cpu_run_virtual_total + t3;

	d->cpu_run_virtual_total =

		(tmp < (s64)d->cpu_run_virtual_total) ?	0 : tmp;

kernel/exit.c

+1 −1
Original line number Diff line number Diff line
@@ -122,9 +122,9 @@ static void __exit_signal(struct task_struct *tsk) 
		sig->maj_flt += tsk->maj_flt;

		sig->nvcsw += tsk->nvcsw;

		sig->nivcsw += tsk->nivcsw;

		sig->sched_time += tsk->sched_time;

		sig->inblock += task_io_get_inblock(tsk);

		sig->oublock += task_io_get_oublock(tsk);

		sig->sum_sched_runtime += tsk->se.sum_exec_runtime;

		sig = NULL; /* Marker for below. */

	}

kernel/fork.c

+2 −2
Original line number Diff line number Diff line
@@ -877,7 +877,7 @@ static inline int copy_signal(unsigned long clone_flags, struct task_struct * ts 
	sig->nvcsw = sig->nivcsw = sig->cnvcsw = sig->cnivcsw = 0;

	sig->min_flt = sig->maj_flt = sig->cmin_flt = sig->cmaj_flt = 0;

	sig->inblock = sig->oublock = sig->cinblock = sig->coublock = 0;

	sig->sched_time = 0;

	sig->sum_sched_runtime = 0;

	INIT_LIST_HEAD(&sig->cpu_timers[0]);

	INIT_LIST_HEAD(&sig->cpu_timers[1]);

	INIT_LIST_HEAD(&sig->cpu_timers[2]);
@@ -1040,7 +1040,7 @@ static struct task_struct *copy_process(unsigned long clone_flags, 


	p->utime = cputime_zero;

	p->stime = cputime_zero;

 	p->sched_time = 0;



#ifdef CONFIG_TASK_XACCT

	p->rchar = 0;		/* I/O counter: bytes read */

	p->wchar = 0;		/* I/O counter: bytes written */