linux-kernel - [PATCH 0/4] consolidate and cleanup CPU capacity

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

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20230901130312.247719-1-vincent.guittot@linaro.org>
Date:   Fri,  1 Sep 2023 15:03:08 +0200
From:   Vincent Guittot <vincent.guittot@...aro.org>
To:     linux@...linux.org.uk, catalin.marinas@....com, will@...nel.org,
        paul.walmsley@...ive.com, palmer@...belt.com,
        aou@...s.berkeley.edu, sudeep.holla@....com,
        gregkh@...uxfoundation.org, rafael@...nel.org, mingo@...hat.com,
        peterz@...radead.org, juri.lelli@...hat.com,
        dietmar.eggemann@....com, rostedt@...dmis.org, bsegall@...gle.com,
        mgorman@...e.de, bristot@...hat.com, vschneid@...hat.com,
        viresh.kumar@...aro.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org,
        linux-pm@...r.kernel.org
Cc:     conor.dooley@...rochip.com, suagrfillet@...il.com,
        ajones@...tanamicro.com, lftan@...nel.org,
        Vincent Guittot <vincent.guittot@...aro.org>
Subject: [PATCH 0/4] consolidate and cleanup CPU capacity

This is the 1st part of consolidating how the max compute capacity is
used in the scheduler and how we calculate the frequency for a level of
utilization.

Fix some unconsistancy when computing frequency for an utilization. There
can be a mismatch between energy model and schedutil.

Next step will be to make a difference between the original
max compute capacity of a CPU and what is currently available when
there is a capping applying forever (i.e. seconds or more).

Vincent Guittot (4):
  sched: consolidate and cleanup access to CPU's max compute capacity
  topology: add a new arch_scale_freq_reference
  cpufreq/schedutil: use a fixed reference frequency
  energy_model: use a fixed reference frequency

 arch/arm/include/asm/topology.h   |  1 +
 arch/arm64/include/asm/topology.h |  1 +
 arch/riscv/include/asm/topology.h |  1 +
 drivers/base/arch_topology.c      |  9 +++------
 include/linux/arch_topology.h     |  7 +++++++
 include/linux/energy_model.h      | 20 +++++++++++++++++---
 kernel/sched/core.c               |  2 +-
 kernel/sched/cpudeadline.c        |  2 +-
 kernel/sched/cpufreq_schedutil.c  | 29 +++++++++++++++++++++++++++--
 kernel/sched/deadline.c           |  4 ++--
 kernel/sched/fair.c               | 18 ++++++++----------
 kernel/sched/rt.c                 |  2 +-
 kernel/sched/sched.h              |  6 ------
 kernel/sched/topology.c           |  7 +++++--
 14 files changed, 75 insertions(+), 34 deletions(-)

-- 
2.34.1