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sched: simplify SCHED_FEAT_* code 

Peter Zijlstra suggested to simplify SCHED_FEAT_* checks via the
sched_feat(x) macro.

No code changed:

   text    data     bss     dec     hex filename
   38895    3550      24   42469    a5e5 sched.o.before
   38895    3550      24   42469    a5e5 sched.o.after

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Mike Galbraith <efault@gmx.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Peter Zijlstra 2007-10-15 17:00:03 +02:00 committed by Ingo Molnar
parent 429d43bcc0
commit e59c80c5bb
1 changed files with 7 additions and 5 deletions
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12
kernel/sched_fair.c
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@ -105,6 +105,8 @@ const_debug unsigned int sysctl_sched_features =
SCHED_FEAT_START_DEBIT *1 |
SCHED_FEAT_SKIP_INITIAL *0;
#define sched_feat(x) (sysctl_sched_features & SCHED_FEAT_##x)
extern struct sched_class fair_sched_class;
/**************************************************************
@ -541,14 +543,14 @@ static void __enqueue_sleeper(struct cfs_rq *cfs_rq, struct sched_entity *se,
if (unlikely(cfs_rq->sleeper_bonus > sysctl_sched_runtime_limit))
return;
if (sysctl_sched_features & SCHED_FEAT_SLEEPER_LOAD_AVG)
if (sched_feat(SLEEPER_LOAD_AVG))
load = rq_of(cfs_rq)->cpu_load[2];
/*
* Fix up delta_fair with the effect of us running
* during the whole sleep period:
*/
if (sysctl_sched_features & SCHED_FEAT_SLEEPER_AVG)
if (sched_feat(SLEEPER_AVG))
delta_fair = div64_likely32((u64)delta_fair * load,
load + se->load.weight);
@ -572,7 +574,7 @@ static void enqueue_sleeper(struct cfs_rq *cfs_rq, struct sched_entity *se)
unsigned long delta_fair;
if ((entity_is_task(se) && tsk->policy == SCHED_BATCH) ||
!(sysctl_sched_features & SCHED_FEAT_FAIR_SLEEPERS))
!sched_feat(FAIR_SLEEPERS))
return;
delta_fair = (unsigned long)min((u64)(2*sysctl_sched_runtime_limit),
@ -1158,14 +1160,14 @@ static void task_new_fair(struct rq *rq, struct task_struct *p)
* The first wait is dominated by the child-runs-first logic,
* so do not credit it with that waiting time yet:
*/
if (sysctl_sched_features & SCHED_FEAT_SKIP_INITIAL)
if (sched_feat(SKIP_INITIAL))
se->wait_start_fair = 0;
/*
* The statistical average of wait_runtime is about
* -granularity/2, so initialize the task with that:
*/
if (sysctl_sched_features & SCHED_FEAT_START_DEBIT)
if (sched_feat(START_DEBIT))
se->wait_runtime = -(sched_granularity(cfs_rq) / 2);
__enqueue_entity(cfs_rq, se);