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9d783c8dd1
linux/kernel/sched
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Vincent Guittot 9d783c8dd1 sched/fair: Skip update_blocked_averages if we are defering load balance 
In newidle_balance(), the scheduler skips load balance to the new idle cpu
when the 1st sd of this_rq is:

   this_rq->avg_idle < sd->max_newidle_lb_cost

Doing a costly call to update_blocked_averages() will not be useful and
simply adds overhead when this condition is true.

Check the condition early in newidle_balance() to skip
update_blocked_averages() when possible.

Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Link: https://lore.kernel.org/r/20211019123537.17146-3-vincent.guittot@linaro.org
2021-10-31 11:11:37 +01:00
..
autogroup.c
autogroup.h
clock.c sched: Fix various typos 2021-03-22 00:11:52 +01:00
completion.c completion: Use lockdep_assert_RT_in_threaded_ctx() in complete_all() 2020-03-23 18:40:25 +01:00
core_sched.c sched: Make cookie functions static 2021-10-05 15:52:07 +02:00
core.c sched: Add wrapper for get_wchan() to keep task blocked 2021-10-15 11:25:14 +02:00
cpuacct.c sched: Wrap rq::lock access 2021-05-12 11:43:26 +02:00
cpudeadline.c sched,rt: Use the full cpumask for balancing 2020-11-10 18:39:00 +01:00
cpudeadline.h
cpufreq_schedutil.c cpufreq: schedutil: Use kobject release() method to free sugov_tunables 2021-08-06 15:34:55 +02:00
cpufreq.c cpufreq: Avoid leaving stale IRQ work items during CPU offline 2019-12-12 17:59:43 +01:00
cpupri.c sched: Fix various typos 2021-03-22 00:11:52 +01:00
cpupri.h sched/cpupri: Add CPUPRI_HIGHER 2020-10-29 11:00:30 +01:00
cputime.c Scheduler updates for this cycle are: 2021-04-28 13:33:57 -07:00
deadline.c sched/dl: Support schedstats for deadline sched class 2021-10-05 15:51:53 +02:00
debug.c sched: Fix DEBUG && !SCHEDSTATS warn 2021-10-06 10:30:57 +02:00
fair.c sched/fair: Skip update_blocked_averages if we are defering load balance 2021-10-31 11:11:37 +01:00
features.h sched: Disable TTWU_QUEUE on RT 2021-10-05 15:52:12 +02:00
idle.c sched/idle: Make the idle timer expire in hard interrupt context 2021-09-09 10:36:16 +02:00
isolation.c sched/isolation: Reconcile rcu_nocbs= and nohz_full= 2021-05-13 14:12:47 +02:00
loadavg.c sched: Make multiple runqueue task counters 32-bit 2021-05-12 21:34:17 +02:00
Makefile sched: Disable -Wunused-but-set-variable 2021-10-15 11:25:15 +02:00
membarrier.c sched/membarrier: fix missing local execution of ipi_sync_rq_state() 2021-03-06 12:40:21 +01:00
pelt.c sched: Fix various typos 2021-03-22 00:11:52 +01:00
pelt.h Merge branch 'sched/urgent' into sched/core, to resolve conflicts 2021-06-18 11:31:25 +02:00
psi.c Merge branch 'for-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup 2021-07-01 17:22:14 -07:00
rt.c sched/rt: Support schedstats for RT sched class 2021-10-05 15:51:51 +02:00
sched-pelt.h
sched.h sched/core: Remove rq_relock() 2021-10-22 15:32:46 +02:00
smp.h sched/headers: Split out open-coded prototypes into kernel/sched/smp.h 2020-05-28 11:03:20 +02:00
stats.c sched: Introduce task block time in schedstats 2021-10-05 15:51:48 +02:00
stats.h sched: Make schedstats helpers independent of fair sched class 2021-10-05 15:51:47 +02:00
stop_task.c sched: Make struct sched_statistics independent of fair sched class 2021-10-05 15:51:45 +02:00
swait.c sched/swait: Prepare usage in completions 2020-03-21 16:00:23 +01:00
topology.c sched/rt: Annotate the RT balancing logic irqwork as IRQ_WORK_HARD_IRQ 2021-10-15 11:25:16 +02:00
wait_bit.c sched/wait: fix ___wait_var_event(exclusive) 2019-12-17 13:32:50 +01:00
wait.c rq-qos: fix missed wake-ups in rq_qos_throttle try two 2021-06-08 15:12:57 -06:00