| From: |
| Yicong Yang <yangyicong-AT-hisilicon.com> |
| To: |
| <peterz-AT-infradead.org>, <mingo-AT-redhat.com>, <juri.lelli-AT-redhat.com>, <vincent.guittot-AT-linaro.org>, <tim.c.chen-AT-linux.intel.com>, <gautham.shenoy-AT-amd.com>, <linux-kernel-AT-vger.kernel.org>, <linux-arm-kernel-AT-lists.infradead.org> |
| Subject: |
| [PATCH v2 0/2] sched/fair: Wake task within the cluster when possible |
| Date: |
| Wed, 26 Jan 2022 16:09:45 +0800 |
| Message-ID: |
| <20220126080947.4529-1-yangyicong@hisilicon.com> |
| Cc: |
| <dietmar.eggemann-AT-arm.com>, <rostedt-AT-goodmis.org>, <bsegall-AT-google.com>, <bristot-AT-redhat.com>, <prime.zeng-AT-huawei.com>, <yangyicong-AT-hisilicon.com>, <jonathan.cameron-AT-huawei.com>, <ego-AT-linux.vnet.ibm.com>, <srikar-AT-linux.vnet.ibm.com>, <linuxarm-AT-huawei.com>, <21cnbao-AT-gmail.com>, <song.bao.hua-AT-hisilicon.com>, <guodong.xu-AT-linaro.org> |
| Archive-link: |
| Article |
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 v1:
- regain the performance data based on v5.17-rc1
- rename cpus_share_cluster to cpus_share_resources per Vincent and Gautham, thanks!
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 | 46 +++++++++++++++++++++++++++++++---
kernel/sched/sched.h | 2 ++
kernel/sched/topology.c | 15 +++++++++++
6 files changed, 85 insertions(+), 5 deletions(-)
--
2.24.0
