Messages in this thread | | | From | Yicong Yang <> | Subject | [PATCH v4 0/2] sched/fair: Wake task within the cluster when possible | Date | Thu, 9 Jun 2022 20:06:20 +0800 |
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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
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