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Subject[RT PATCH 0/8] migrate disable fixes and performance
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With these patches, a kernel build on a 104-cpu machine took around 75%
less wall time and 85% less system time. Note that there is a difference
in v5.2-rt compared to v5.0-rt. The performance with these patches is
similar in both cases, but without these patches v5.2-rt is substantially
slower. In v5.0-rt with a previous version of these patches, lazy
migrate disable reduced kernel build time by around 15-20% wall and
70-75% system.

Scott Wood (8):
sched: migrate_enable: Use sleeping_lock to indicate involuntary sleep
sched: __set_cpus_allowed_ptr: Check cpus_mask, not cpus_ptr
sched: Remove dead __migrate_disabled() check
sched: migrate disable: Protect cpus_ptr with lock
sched/deadline: Reclaim cpuset bandwidth in .migrate_task_rq()
sched: migrate_enable: Set state to TASK_RUNNING
sched: migrate_enable: Use select_fallback_rq()
sched: Lazy migrate_disable processing

include/linux/cpu.h | 4 -
include/linux/sched.h | 15 ++--
init/init_task.c | 4 +
kernel/cpu.c | 97 ++++++++---------------
kernel/rcu/tree_plugin.h | 2 +-
kernel/sched/core.c | 200 +++++++++++++++++++----------------------------
kernel/sched/deadline.c | 67 ++++++++--------
kernel/sched/sched.h | 4 +
lib/smp_processor_id.c | 3 +
9 files changed, 166 insertions(+), 230 deletions(-)

--
1.8.3.1

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