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author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2008-04-19 19:44:57 +0200 |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-04-19 19:44:57 +0200 |
commit | d0b27fa77854b149ad4af08b0fe47fe712a47ade (patch) | |
tree | 2f4487c108a5132e8d52456567b4a67e78fbb4a6 /kernel/user.c | |
parent | 57d3da2911787a101a384532f4519f9640bae883 (diff) | |
download | kernel_samsung_tuna-d0b27fa77854b149ad4af08b0fe47fe712a47ade.zip kernel_samsung_tuna-d0b27fa77854b149ad4af08b0fe47fe712a47ade.tar.gz kernel_samsung_tuna-d0b27fa77854b149ad4af08b0fe47fe712a47ade.tar.bz2 |
sched: rt-group: synchonised bandwidth period
Various SMP balancing algorithms require that the bandwidth period
run in sync.
Possible improvements are moving the rt_bandwidth thing into root_domain
and keeping a span per rt_bandwidth which marks throttled cpus.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/user.c')
-rw-r--r-- | kernel/user.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/kernel/user.c b/kernel/user.c index 7132022..5925c68 100644 --- a/kernel/user.c +++ b/kernel/user.c @@ -193,6 +193,33 @@ static ssize_t cpu_rt_runtime_store(struct kobject *kobj, static struct kobj_attribute cpu_rt_runtime_attr = __ATTR(cpu_rt_runtime, 0644, cpu_rt_runtime_show, cpu_rt_runtime_store); + +static ssize_t cpu_rt_period_show(struct kobject *kobj, + struct kobj_attribute *attr, + char *buf) +{ + struct user_struct *up = container_of(kobj, struct user_struct, kobj); + + return sprintf(buf, "%lu\n", sched_group_rt_period(up->tg)); +} + +static ssize_t cpu_rt_period_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t size) +{ + struct user_struct *up = container_of(kobj, struct user_struct, kobj); + unsigned long rt_period; + int rc; + + sscanf(buf, "%lu", &rt_period); + + rc = sched_group_set_rt_period(up->tg, rt_period); + + return (rc ? rc : size); +} + +static struct kobj_attribute cpu_rt_period_attr = + __ATTR(cpu_rt_period, 0644, cpu_rt_period_show, cpu_rt_period_store); #endif /* default attributes per uid directory */ @@ -202,6 +229,7 @@ static struct attribute *uids_attributes[] = { #endif #ifdef CONFIG_RT_GROUP_SCHED &cpu_rt_runtime_attr.attr, + &cpu_rt_period_attr.attr, #endif NULL }; |