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: Mon, 16 May 2016 12:36:19 +0300 From: Konstantin Khlebnikov <khlebnikov@...dex-team.ru> To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org Cc: Tejun Heo <tj@...nel.org>, cgroups@...r.kernel.org, containers@...ts.linux-foundation.org Subject: [PATCH RFC 0/3] sched/fair: cpu time reserves for cgroups This feature allows to change cpu cgroup weight for a limited time. Cgroup interface: cpu.cfs_reserve_us - reserved time for each cpu.cfs_period_us cpu.cfs_reserve_shares - group weight during reserved time While cfs group consumes reserved cpu time it has different weight, thus it gets different vruntime penalty for that execution. ^ weight | | reserve | shares -------* | | | | | | shares - *-----------------* | | | | 0------|-----------------|-----------> time reserve quota Reserve can work as a "low limit": boost weight for "guaranteed" time, and as a "high limit": give normal weight for a limited time and allow utilize cpu when nobody else needs it. Sample setup: level | shares reserve shares --------+---------------------------- high | 1024*16 1024*16*16 normal | 1024 1024*16 low | 1024/16 1024 In this way cgroups are devided into three levels. During reserved time they are promoted to the next level. --- Konstantin Khlebnikov (3): sched/fair: call __refill_cfs_bandwidth_runtime only for finite quota sched/fair: copy taskgroup shares to each cfs_rq sched/fair: pulse-weight modulation controller for cpu cgroup kernel/sched/core.c | 96 +++++++++++++++++++++++++++++++++++++++++++----- kernel/sched/fair.c | 101 ++++++++++++++++++++++++++++++++++++++------------ kernel/sched/sched.h | 5 ++ 3 files changed, 168 insertions(+), 34 deletions(-)
Powered by blists - more mailing lists