lkml.org 
[lkml]   [2019]   [Mar]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    From
    Subject[PATCH 0/7] cpufreq: Call transition notifier only once for each policy
    Date
    Currently we call the cpufreq transition notifiers once for each CPU of
    the policy->cpus cpumask, which isn't that efficient. This patchset
    tries to simplify that by adding another field in struct cpufreq_freqs,
    cpus, so the callback has all the information available with a single
    call for each policy.

    I have tested this on arm64 platform and is compile tested for other
    platforms. This has gone through 0-day testing as well, I have pushed my
    branch over a week back to the public tree which gets tested by 0-day
    bot.

    FWIW, it maybe possible to make the callback implementation more
    efficient now that they are called only once for each policy, but this
    patchset only did the minimum amount of changes to make sure we don't
    end up breaking otherwise working code.

    --
    viresh

    Viresh Kumar (7):
    cpufreq: Pass policy->related_cpus to transition notifiers
    ARM: smp: Update cpufreq transition notifier to handle multiple CPUs
    ARM: twd: Update cpufreq transition notifier to handle multiple CPUs
    sparc64: Update cpufreq transition notifier to handle multiple CPUs
    x86/tsc: Update cpufreq transition notifier to handle multiple CPUs
    KVM: x86: Update cpufreq transition notifier to handle multiple CPUs
    cpufreq: Call transition notifiers only once for each policy

    arch/arm/kernel/smp.c | 23 ++++++++++++++---------
    arch/arm/kernel/smp_twd.c | 9 ++++++---
    arch/sparc/kernel/time_64.c | 28 ++++++++++++++++------------
    arch/x86/kernel/tsc.c | 31 ++++++++++++++++++++-----------
    arch/x86/kvm/x86.c | 31 ++++++++++++++++++++-----------
    drivers/cpufreq/cpufreq.c | 19 ++++++++++---------
    include/linux/cpufreq.h | 2 +-
    7 files changed, 87 insertions(+), 56 deletions(-)

    --
    2.21.0.rc0.269.g1a574e7a288b

    \
     
     \ /
      Last update: 2019-03-14 07:44    [W:4.606 / U:0.108 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site