| From: |
| Huaixin Chang <changhuaixin-AT-linux.alibaba.com> |
| To: |
| changhuaixin-AT-linux.alibaba.com |
| Subject: |
| [PATCH v5 0/3] sched/fair: Burstable CFS bandwidth controller |
| Date: |
| Thu, 20 May 2021 20:34:16 +0800 |
| Message-ID: |
| <20210520123419.8039-1-changhuaixin@linux.alibaba.com> |
| Cc: |
| bsegall-AT-google.com, dietmar.eggemann-AT-arm.com, dtcccc-AT-linux.alibaba.com, juri.lelli-AT-redhat.com, khlebnikov-AT-yandex-team.ru, linux-kernel-AT-vger.kernel.org, mgorman-AT-suse.de, mingo-AT-redhat.com, odin-AT-uged.al, odin-AT-ugedal.com, pauld-AT-redhead.com, peterz-AT-infradead.org, pjt-AT-google.com, rostedt-AT-goodmis.org, shanpeic-AT-linux.alibaba.com, tj-AT-kernel.org, vincent.guittot-AT-linaro.org, xiyou.wangcong-AT-gmail.com |
| Archive-link: |
| Article |
Changelog:
v5:
- Rearrange into 3 patches, one less than the previous version.
- The interference to other groups are valued.
- Put a limit on burst, so that code is further simplified.
- Rebase upon v5.13-rc3.
v4:
- Adjust assignments in tg_set_cfs_bandwidth(), saving unnecessary
assignemnts when quota == RUNTIME_INF.
- Getting rid of sysctl_sched_cfs_bw_burst_onset_percent, as there seems
no justification for both controlling start bandwidth and a percent
way.
- Comment improvement in sched_cfs_period_timer() shifts on explaining
why max_overrun shifting to 0 is a problem.
- Rename previous_runtime to runtime_at_period_start.
- Add cgroup2 interface and documentation.
- Getting rid of exposing current_bw as there are not enough
justification and the updating problem.
- Add justification on cpu.stat change in the changelog.
- Rebase upon v5.12-rc3.
- Correct SoB chain.
- Several indentation fixes.
- Adjust quota in schbench test from 700000 to 600000.
Link:
https://lore.kernel.org/lkml/20210316044931.39733-1-chang...
v3:
- Fix another issue reported by test robot.
- Update docs as Randy Dunlap suggested.
Link:
https://lore.kernel.org/lkml/20210120122715.29493-1-chang...
v2:
- Fix an issue reported by test robot.
- Rewriting docs. Appreciate any further suggestions or help.
Link:
https://lore.kernel.org/lkml/20210121110453.18899-1-chang...
v1 Link:
https://lore.kernel.org/lkml/20201217074620.58338-1-chang...
Previously, Cong Wang and Konstantin Khlebnikov proposed similar
feature:
https://lore.kernel.org/lkml/20180522062017.5193-1-xiyou....
https://lore.kernel.org/lkml/157476581065.5793.4518979877...
This time we present more latency statistics and handle overflow while
accumulating.
Huaixin Chang (3):
sched/fair: Introduce the burstable CFS controller
sched/fair: Add cfs bandwidth burst statistics
sched/fair: Add document for burstable CFS bandwidth
Documentation/admin-guide/cgroup-v2.rst | 17 +++---
Documentation/scheduler/sched-bwc.rst | 76 ++++++++++++++++++++++----
include/linux/sched/sysctl.h | 1 +
kernel/sched/core.c | 96 ++++++++++++++++++++++++++-------
kernel/sched/fair.c | 32 ++++++++++-
kernel/sched/sched.h | 4 ++
kernel/sysctl.c | 9 ++++
7 files changed, 200 insertions(+), 35 deletions(-)
--
2.14.4.44.g2045bb6
