linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
* [PATCH v4 0/2] sched/fair: Wake task within the cluster when possible
@ 2022-06-09 12:06 Yicong Yang
  2022-06-09 12:06 ` [PATCH v4 1/2] sched: Add per_cpu cluster domain info and cpus_share_resources API Yicong Yang
  2022-06-09 12:06 ` [PATCH v4 2/2] sched/fair: Scan cluster before scanning LLC in wake-up path Yicong Yang
  0 siblings, 2 replies; 24+ messages in thread
From: Yicong Yang @ 2022-06-09 12:06 UTC (permalink / raw)
  To: peterz, mingo, juri.lelli, vincent.guittot, tim.c.chen,
	gautham.shenoy, linux-kernel, linux-arm-kernel
  Cc: dietmar.eggemann, rostedt, bsegall, bristot, prime.zeng,
	yangyicong, jonathan.cameron, ego, srikar, linuxarm, 21cnbao,
	guodong.xu, hesham.almatary, john.garry, shenyang39

This is the follow-up work to support cluster scheduler. Previously
we have added cluster level in the scheduler for both ARM64[1] and
X86[2] to support load balance between clusters to bring more memory
bandwidth and decrease cache contention. This patchset, on the other
hand, takes care of wake-up path by giving CPUs within the same cluster
a try before scanning the whole LLC to benefit those tasks communicating
with each other.

[1] 778c558f49a2 ("sched: Add cluster scheduler level in core and related Kconfig for ARM64")
[2] 66558b730f25 ("sched: Add cluster scheduler level for x86")

Change since v3:
- fix compile error when !CONFIG_SCHED_CLUSTER, reported by lkp test.
Link: https://lore.kernel.org/lkml/20220608095758.60504-1-yangyicong@hisilicon.com/

Change since v2:
- leverage SIS_PROP to suspend redundant scanning when LLC is overloaded
- remove the ping-pong suppression
- address the comment from Tim, thanks.
Link: https://lore.kernel.org/lkml/20220126080947.4529-1-yangyicong@hisilicon.com/

Change since v1:
- regain the performance data based on v5.17-rc1
- rename cpus_share_cluster to cpus_share_resources per Vincent and Gautham, thanks!
Link: https://lore.kernel.org/lkml/20211215041149.73171-1-yangyicong@hisilicon.com/

Barry Song (2):
  sched: Add per_cpu cluster domain info and cpus_share_resources API
  sched/fair: Scan cluster before scanning LLC in wake-up path

 include/linux/sched/sd_flags.h |  7 ++++++
 include/linux/sched/topology.h |  8 ++++++-
 kernel/sched/core.c            | 12 ++++++++++
 kernel/sched/fair.c            | 44 +++++++++++++++++++++++++++++++---
 kernel/sched/sched.h           |  2 ++
 kernel/sched/topology.c        | 15 ++++++++++++
 6 files changed, 84 insertions(+), 4 deletions(-)

-- 
2.24.0


^ permalink raw reply	[flat|nested] 24+ messages in thread

end of thread, other threads:[~2022-06-29  3:22 UTC | newest]

Thread overview: 24+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-06-09 12:06 [PATCH v4 0/2] sched/fair: Wake task within the cluster when possible Yicong Yang
2022-06-09 12:06 ` [PATCH v4 1/2] sched: Add per_cpu cluster domain info and cpus_share_resources API Yicong Yang
2022-06-09 22:28   ` Tim Chen
2022-06-10  6:54     ` Yicong Yang
2022-06-15 14:19   ` K Prateek Nayak
2022-06-15 15:43     ` Gautham R. Shenoy
2022-06-16  8:10       ` Yicong Yang
2022-06-16  7:55     ` Yicong Yang
2022-06-17 12:20       ` K Prateek Nayak
2022-06-17 16:50         ` Tim Chen
2022-06-20 11:20           ` K Prateek Nayak
2022-06-20 13:37             ` Abel Wu
2022-06-28 11:55               ` K Prateek Nayak
2022-06-29  3:22                 ` Yicong Yang
2022-06-09 12:06 ` [PATCH v4 2/2] sched/fair: Scan cluster before scanning LLC in wake-up path Yicong Yang
2022-06-09 22:47   ` Tim Chen
2022-06-10  4:01     ` Barry Song
2022-06-10  6:39     ` Yicong Yang
2022-06-10 21:19       ` Tim Chen
2022-06-11  3:03       ` Chen Yu
2022-06-11  7:40         ` Yicong Yang
2022-06-11  9:04           ` Chen Yu
2022-06-26 12:13   ` Abel Wu
2022-06-27  8:16     ` Yicong Yang

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).