[PATCH 0/4] cpufreq: Record stats with fast-switching

Viresh Kumar
2020-09-02T07:25:02Z

Hi,

We disabled recording cpufreq stats when fast switching was introduced
to the cpufreq core as the cpufreq stats required to take a spinlock and
that can't be allowed (for performance reasons) on scheduler's hot path.

Here is an attempt to get rid of the lock and bring back the support.

--
Viresh

Viresh Kumar (4):
cpufreq: stats: Defer stats update to
cpufreq_stats_record_transition()
cpufreq: stats: Remove locking
cpufreq: stats: Enable stats for fast-switch as well
cpufreq: Move traces and update to policy->cur to cpufreq core

drivers/cpufreq/cpufreq.c | 16 +++++-
drivers/cpufreq/cpufreq_stats.c | 87 ++++++++++++++++++++------------
kernel/sched/cpufreq_schedutil.c | 12 +----
3 files changed, 72 insertions(+), 43 deletions(-)

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2.25.0.rc1.19.g042ed3e048af