Messages in this thread | | | Subject | Re: [PATCH v3] cpuacct: VIRT_CPU_ACCOUNTING don't prevent percpu cputime count | From | Peter Zijlstra <> | Date | Sat, 09 May 2009 11:38:45 +0200 |
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On Sat, 2009-05-09 at 18:26 +0900, KOSAKI Motohiro wrote: > > Index: b/kernel/sched.c > =================================================================== > --- a/kernel/sched.c 2009-05-09 16:48:08.000000000 +0900 > +++ b/kernel/sched.c 2009-05-09 18:16:00.000000000 +0900 > @@ -824,8 +824,12 @@ static struct file_operations sched_feat > .release = single_release, > }; > > +static __read_mostly s32 cpuacct_batch; > + > static __init int sched_init_debug(void) > { > + cpuacct_batch = jiffies_to_cputime(percpu_counter_batch); > + > debugfs_create_file("sched_features", 0644, NULL, NULL, > &sched_feat_fops);
I'm pretty user you can select cpu accounting without SCHED_DEBUG...
> @@ -10457,7 +10461,8 @@ static void cpuacct_update_stats(struct > ca = task_ca(tsk); > > do { > - percpu_counter_add(&ca->cpustat[idx], val); > + __percpu_counter_add(&ca->cpustat[idx], val, cpuacct_batch); > + > ca = ca->parent; > } while (ca); > rcu_read_unlock(); >
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