AcoSail/kernel_optimize_test
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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched-devel

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* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched-devel:
  sched: add arch_update_cpu_topology hook.
  sched: add exported arch_reinit_sched_domains() to header file.
  sched: remove double unlikely from schedule()
  sched: cleanup old and rarely used 'debug' features.
This commit is contained in:
Linus Torvalds 2008-03-21 10:05:19 -07:00
commit 028011e139
4 changed files with 12 additions and 22 deletions
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1
include/linux/sched.h
View File

@ -790,6 +790,7 @@ struct sched_domain {
};
extern void partition_sched_domains(int ndoms_new, cpumask_t *doms_new);
extern int arch_reinit_sched_domains(void);
#endif /* CONFIG_SMP */

2
include/linux/topology.h
View File

@ -50,6 +50,8 @@
for_each_online_node(node) \
if (nr_cpus_node(node))
void arch_update_cpu_topology(void);
/* Conform to ACPI 2.0 SLIT distance definitions */
#define LOCAL_DISTANCE 10
#define REMOTE_DISTANCE 20

17
kernel/sched.c
View File

@ -594,18 +594,14 @@ enum {
SCHED_FEAT_NEW_FAIR_SLEEPERS = 1,
SCHED_FEAT_WAKEUP_PREEMPT = 2,
SCHED_FEAT_START_DEBIT = 4,
SCHED_FEAT_TREE_AVG = 8,
SCHED_FEAT_APPROX_AVG = 16,
SCHED_FEAT_HRTICK = 32,
SCHED_FEAT_DOUBLE_TICK = 64,
SCHED_FEAT_HRTICK = 8,
SCHED_FEAT_DOUBLE_TICK = 16,
};
const_debug unsigned int sysctl_sched_features =
SCHED_FEAT_NEW_FAIR_SLEEPERS * 1 |
SCHED_FEAT_WAKEUP_PREEMPT * 1 |
SCHED_FEAT_START_DEBIT * 1 |
SCHED_FEAT_TREE_AVG * 0 |
SCHED_FEAT_APPROX_AVG * 0 |
SCHED_FEAT_HRTICK * 1 |
SCHED_FEAT_DOUBLE_TICK * 0;
@ -3886,7 +3882,7 @@ asmlinkage void __sched schedule(void)
if (prev->state && !(preempt_count() & PREEMPT_ACTIVE)) {
if (unlikely((prev->state & TASK_INTERRUPTIBLE) &&
unlikely(signal_pending(prev)))) {
signal_pending(prev))) {
prev->state = TASK_RUNNING;
} else {
deactivate_task(rq, prev, 1);
@ -6811,6 +6807,10 @@ static int ndoms_cur; /* number of sched domains in 'doms_cur' */
*/
static cpumask_t fallback_doms;
void __attribute__((weak)) arch_update_cpu_topology(void)
{
}
/*
* Set up scheduler domains and groups. Callers must hold the hotplug lock.
* For now this just excludes isolated cpus, but could be used to
@ -6820,6 +6820,7 @@ static int arch_init_sched_domains(const cpumask_t *cpu_map)
{
int err;
arch_update_cpu_topology();
ndoms_cur = 1;
doms_cur = kmalloc(sizeof(cpumask_t), GFP_KERNEL);
if (!doms_cur)
@ -6924,7 +6925,7 @@ void partition_sched_domains(int ndoms_new, cpumask_t *doms_new)
}
#if defined(CONFIG_SCHED_MC) || defined(CONFIG_SCHED_SMT)
static int arch_reinit_sched_domains(void)
int arch_reinit_sched_domains(void)
{
int err;

14
kernel/sched_fair.c
View File

@ -302,11 +302,6 @@ static u64 __sched_vslice(unsigned long rq_weight, unsigned long nr_running)
return vslice;
}
static u64 sched_vslice(struct cfs_rq *cfs_rq)
{
return __sched_vslice(cfs_rq->load.weight, cfs_rq->nr_running);
}
static u64 sched_vslice_add(struct cfs_rq *cfs_rq, struct sched_entity *se)
{
return __sched_vslice(cfs_rq->load.weight + se->load.weight,
@ -504,15 +499,6 @@ place_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int initial)
} else
vruntime = cfs_rq->min_vruntime;
if (sched_feat(TREE_AVG)) {
struct sched_entity *last = __pick_last_entity(cfs_rq);
if (last) {
vruntime += last->vruntime;
vruntime >>= 1;
}
} else if (sched_feat(APPROX_AVG) && cfs_rq->nr_running)
vruntime += sched_vslice(cfs_rq)/2;
/*
* The 'current' period is already promised to the current tasks,
* however the extra weight of the new task will slow them down a