lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Thu, 30 Jun 2022 14:55:25 +0800 From: Yicong Yang <yangyicong@...ilicon.com> To: <peterz@...radead.org>, <mingo@...hat.com>, <juri.lelli@...hat.com>, <vincent.guittot@...aro.org>, <tim.c.chen@...ux.intel.com>, <gautham.shenoy@....com>, <linux-kernel@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org> CC: <dietmar.eggemann@....com>, <rostedt@...dmis.org>, <bsegall@...gle.com>, <bristot@...hat.com>, <prime.zeng@...wei.com>, <yangyicong@...ilicon.com>, <jonathan.cameron@...wei.com>, <ego@...ux.vnet.ibm.com>, <srikar@...ux.vnet.ibm.com>, <linuxarm@...wei.com>, <21cnbao@...il.com>, <guodong.xu@...aro.org>, <hesham.almatary@...wei.com>, <john.garry@...wei.com>, <shenyang39@...wei.com>, <kprateek.nayak@....com>, <yu.c.chen@...el.com>, <wuyun.abel@...edance.com> Subject: [PATCH v5 0/2] sched/fair: Scan cluster before scanning LLC in wake-up path 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 v4: - rename cpus_share_resources to cpus_share_lowest_cache to be more informative, per Tim - return -1 when nr==0 in scan_cluster(), per Abel Thanks! Link: https://lore.kernel.org/lkml/20220609120622.47724-1-yangyicong@hisilicon.com/ 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_lowest_cache 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
Powered by blists - more mailing lists