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sched/debug: Remove several CONFIG_SCHEDSTATS guards

Browse source 
Clean up the sched code by removing several of the CONFIG_SCHEDSTATS
guards, using schedstat_*() macros where needed.

Code size:

  !CONFIG_SCHEDSTATS defconfig:

      text	   data	    bss	     dec	    hex	filename
  10209818	4368184	1105920	15683922	 ef5152	vmlinux.before.nostats
  10209818	4368184	1105920	15683922	 ef5152	vmlinux.after.nostats

  CONFIG_SCHEDSTATS defconfig:

      text	   data	    bss	    dec	    hex	filename
  10214210	4370040	1105920	15690170	 ef69ba	vmlinux.before.stats
  10214210	4370680	1105920	15690810	 ef6c3a	vmlinux.after.stats

Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/e51e0ebe5af95ac295de720dd252e7c0d2142e4a.1466184592.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Josh Poimboeuf 2016-06-17 12:43:26 -05:00 • committed by Ingo Molnar
parent 20e1d4863b
commit 4fa8d299b4
3 changed files with 136 additions and 144 deletions
Download patch file Download diff file Expand all files Collapse all files

33
kernel/sched/core.c
View file

@ -1629,13 +1629,15 @@ static inline int __set_cpus_allowed_ptr(struct task_struct *p,
static void
ttwu_stat(struct task_struct *p, int cpu, int wake_flags)
{
#ifdef CONFIG_SCHEDSTATS
struct rq *rq = this_rq();
struct rq *rq;
if (!schedstat_enabled())
return;
rq = this_rq();
#ifdef CONFIG_SMP
int this_cpu = smp_processor_id();
if (cpu == this_cpu) {
if (cpu == rq->cpu) {
schedstat_inc(rq->ttwu_local);
schedstat_inc(p->se.statistics.nr_wakeups_local);
} else {
@ -1643,7 +1645,7 @@ ttwu_stat(struct task_struct *p, int cpu, int wake_flags)
schedstat_inc(p->se.statistics.nr_wakeups_remote);
rcu_read_lock();
for_each_domain(this_cpu, sd) {
for_each_domain(rq->cpu, sd) {
if (cpumask_test_cpu(cpu, sched_domain_span(sd))) {
schedstat_inc(sd->ttwu_wake_remote);
break;
@ -1654,7 +1656,6 @@ ttwu_stat(struct task_struct *p, int cpu, int wake_flags)
if (wake_flags & WF_MIGRATED)
schedstat_inc(p->se.statistics.nr_wakeups_migrate);
#endif /* CONFIG_SMP */
schedstat_inc(rq->ttwu_count);
@ -1662,8 +1663,6 @@ ttwu_stat(struct task_struct *p, int cpu, int wake_flags)
if (wake_flags & WF_SYNC)
schedstat_inc(p->se.statistics.nr_wakeups_sync);
#endif /* CONFIG_SCHEDSTATS */
}
static inline void ttwu_activate(struct rq *rq, struct task_struct *p, int en_flags)
@ -2084,8 +2083,7 @@ try_to_wake_up(struct task_struct *p, unsigned int state, int wake_flags)
ttwu_queue(p, cpu, wake_flags);
stat:
if (schedstat_enabled())
ttwu_stat(p, cpu, wake_flags);
ttwu_stat(p, cpu, wake_flags);
out:
raw_spin_unlock_irqrestore(&p->pi_lock, flags);
@ -2134,8 +2132,7 @@ static void try_to_wake_up_local(struct task_struct *p, struct pin_cookie cookie
ttwu_activate(rq, p, ENQUEUE_WAKEUP);
ttwu_do_wakeup(rq, p, 0, cookie);
if (schedstat_enabled())
ttwu_stat(p, smp_processor_id(), 0);
ttwu_stat(p, smp_processor_id(), 0);
out:
raw_spin_unlock(&p->pi_lock);
}
@ -7675,12 +7672,10 @@ void normalize_rt_tasks(void)
if (p->flags & PF_KTHREAD)
continue;
p->se.exec_start = 0;
#ifdef CONFIG_SCHEDSTATS
p->se.statistics.wait_start = 0;
p->se.statistics.sleep_start = 0;
p->se.statistics.block_start = 0;
#endif
p->se.exec_start = 0;
schedstat_set(p->se.statistics.wait_start, 0);
schedstat_set(p->se.statistics.sleep_start, 0);
schedstat_set(p->se.statistics.block_start, 0);
if (!dl_task(p) && !rt_task(p)) {
/*