linux/kernel/sched
Vincent Guittot c82a69629c sched/fair: fix case with reduced capacity CPU
The capacity of the CPU available for CFS tasks can be reduced because of
other activities running on the latter. In such case, it's worth trying to
move CFS tasks on a CPU with more available capacity.

The rework of the load balance has filtered the case when the CPU is
classified to be fully busy but its capacity is reduced.

Check if CPU's capacity is reduced while gathering load balance statistic
and classify it group_misfit_task instead of group_fully_busy so we can
try to move the load on another CPU.

Reported-by: David Chen <david.chen@nutanix.com>
Reported-by: Zhang Qiao <zhangqiao22@huawei.com>
Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: David Chen <david.chen@nutanix.com>
Tested-by: Zhang Qiao <zhangqiao22@huawei.com>
Link: https://lkml.kernel.org/r/20220708154401.21411-1-vincent.guittot@linaro.org
2022-07-13 11:29:17 +02:00
..
autogroup.c sched/autogroup: Fix sysctl move 2022-05-30 12:36:36 +02:00
autogroup.h sched/headers: Add header guard to kernel/sched/stats.h and kernel/sched/autogroup.h 2022-02-23 08:22:00 +01:00
build_policy.c sched: Fix missing prototype warnings 2022-05-01 10:03:43 +02:00
build_utility.c sched: Fix missing prototype warnings 2022-05-01 10:03:43 +02:00
clock.c sched/clock: Use try_cmpxchg64 in sched_clock_{local,remote} 2022-05-19 23:46:09 +02:00
completion.c sched/headers: Introduce kernel/sched/build_utility.c and build multiple .c files there 2022-02-23 10:58:33 +01:00
core_sched.c sched/core: add forced idle accounting for cgroups 2022-07-04 09:23:07 +02:00
core.c sched/core: Use try_cmpxchg in set_nr_{and_not,if}_polling 2022-07-04 09:23:08 +02:00
cpuacct.c Merge branch 'sched/fast-headers' into sched/core 2022-03-15 09:05:05 +01:00
cpudeadline.c sched/headers: Introduce kernel/sched/build_policy.c and build multiple .c files there 2022-02-23 10:58:33 +01:00
cpudeadline.h sched/headers: Simplify and clean up header usage in the scheduler 2018-03-04 12:39:29 +01:00
cpufreq_schedutil.c sched, drivers: Remove max param from effective_cpu_util()/sched_cpu_util() 2022-06-28 09:17:46 +02:00
cpufreq.c sched/headers: Introduce kernel/sched/build_utility.c and build multiple .c files there 2022-02-23 10:58:33 +01:00
cpupri.c sched/headers: Introduce kernel/sched/build_utility.c and build multiple .c files there 2022-02-23 10:58:33 +01:00
cpupri.h sched/cpupri: Add CPUPRI_HIGHER 2020-10-29 11:00:30 +01:00
cputime.c sched/core: add forced idle accounting for cgroups 2022-07-04 09:23:07 +02:00
deadline.c sched/deadline: Use proc_douintvec_minmax() limit minimum value 2022-06-13 10:30:00 +02:00
debug.c sched/headers: Introduce kernel/sched/build_utility.c and build multiple .c files there 2022-02-23 10:58:33 +01:00
fair.c sched/fair: fix case with reduced capacity CPU 2022-07-13 11:29:17 +02:00
features.h sched/fair: Introduce SIS_UTIL to search idle CPU based on sum of util_avg 2022-06-28 09:08:30 +02:00
idle.c Scheduler changes in this cycle were: 2022-05-24 11:11:13 -07:00
isolation.c sched/headers: Introduce kernel/sched/build_utility.c and build multiple .c files there 2022-02-23 10:58:33 +01:00
loadavg.c sched/headers: Introduce kernel/sched/build_utility.c and build multiple .c files there 2022-02-23 10:58:33 +01:00
Makefile sched/headers: Introduce kernel/sched/build_policy.c and build multiple .c files there 2022-02-23 10:58:33 +01:00
membarrier.c sched/headers: Introduce kernel/sched/build_utility.c and build multiple .c files there 2022-02-23 10:58:33 +01:00
pelt.c sched/headers: Introduce kernel/sched/build_policy.c and build multiple .c files there 2022-02-23 10:58:33 +01:00
pelt.h sched/fair: Decay task PELT values during wakeup migration 2022-06-28 09:17:46 +02:00
psi.c sched/psi: report zeroes for CPU full at the system level 2022-04-22 12:14:08 +02:00
rt.c sysctl changes for v5.19-rc1 2022-05-26 16:57:20 -07:00
sched-pelt.h sched/fair: Fix "runnable_avg_yN_inv" not used warnings 2019-06-17 12:15:58 +02:00
sched.h sched, drivers: Remove max param from effective_cpu_util()/sched_cpu_util() 2022-06-28 09:17:46 +02:00
smp.h smp: Rename flush_smp_call_function_from_idle() 2022-05-01 10:03:43 +02:00
stats.c sched/headers: Introduce kernel/sched/build_utility.c and build multiple .c files there 2022-02-23 10:58:33 +01:00
stats.h sched/headers: Reorganize, clean up and optimize kernel/sched/sched.h dependencies 2022-02-23 10:58:34 +01:00
stop_task.c sched/headers: Introduce kernel/sched/build_utility.c and build multiple .c files there 2022-02-23 10:58:33 +01:00
swait.c sched/headers: Introduce kernel/sched/build_utility.c and build multiple .c files there 2022-02-23 10:58:33 +01:00
topology.c sched/numa: Adjust imb_numa_nr to a better approximation of memory channels 2022-06-13 10:30:00 +02:00
wait_bit.c sched/headers: Introduce kernel/sched/build_utility.c and build multiple .c files there 2022-02-23 10:58:33 +01:00
wait.c sched/headers: Introduce kernel/sched/build_utility.c and build multiple .c files there 2022-02-23 10:58:33 +01:00