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Subject[RFC PATCH 00/11] Refactor select_task_rq_fair()
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Hi all,

As a follow-up of my recent proposal to remove SD_WAKE_AFFINE, I have this
initial-draft and unfinished refactoring to select_task_rq_fair().

Basic idea is to form a comprehensive view of the topology to guide the
select.

My many wanted jobs haven't been achieved, so I decided to post this initial
draft earlier to have your comments and experiences (I have no experience on
production multi-socket machines and no real experince on heterogeneous CPUs).
But generally, better topology view, I believe, should greatly help with the
full spectrum of machines from big to small.

Just lightly tested, it only works, :)

So my patches are built on Peter's select_idle_sibling() patches (so all of
them should be a little outdated), and borrowed his scan cost regulation part.

Thanks a lot.

Yuyang

--

Peter Zijlstra (6):
sched: Remove unused @cpu argument from destroy_sched_domain*()
sched: Restructure destroy_sched_domain()
sched: Introduce struct sched_domain_shared
sched: Replace sd_busy/nr_busy_cpus with sched_domain_shared
sched: Rewrite select_idle_siblings()
sched: Optimize SCHED_SMT

Yuyang Du (5):
sched: Clean up SD_BALANCE_WAKE flags in sched domain build-up
sched: Remove SD_WAKE_AFFINE flag and replace it with SD_BALANCE_WAKE
sched: Add per CPU variable sd_socket_id to specify the CPU's socket
sched: Add sched_llc_complete static key to specify whether the LLC
covers all CPUs
sched/fair: Refactor select_task_rq_fair()

include/linux/sched.h | 17 +-
kernel/sched/core.c | 134 ++++++++---
kernel/sched/deadline.c | 2 +-
kernel/sched/fair.c | 589 +++++++++++++++++++++++++++++++++++++++++-----
kernel/sched/features.h | 1 +
kernel/sched/idle_task.c | 2 +-
kernel/sched/rt.c | 2 +-
kernel/sched/sched.h | 28 ++-
kernel/time/tick-sched.c | 10 +-
9 files changed, 680 insertions(+), 105 deletions(-)

--
1.7.9.5

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