[PATCH v2 0/1] AMD EPYC: fix schedutil perf regression (freq-invariance)

[Giovanni Gherdovich]

Michael Larabel from Phoronix.com graciously tested v1, see results at:

AMD EPYC 7702 -
https://openbenchmarking.org/result/2101210-PTS-LINUX51178

AMD Ryzen 9 5950X - 
https://openbenchmarking.org/result/2101212-HA-RYZEN959566

The reported regression is recovered, and some workloads even report an
improvement over the v5.10 results.

Thanks Michael for the feedback!


v1 at https://lore.kernel.org/lkml/20210121003223.20257-1-ggherdovich@xxxxxxx/

Changes wrt v1:

- move code around so that it builds for non-x86 architectures too

Giovanni Gherdovich (1):
  x86,sched: On AMD EPYC set freq_max = max_boost in schedutil invariant
    formula

 drivers/cpufreq/acpi-cpufreq.c   | 64 +++++++++++++++++++++++++++++++-
 drivers/cpufreq/cpufreq.c        |  3 ++
 include/linux/cpufreq.h          |  5 +++
 kernel/sched/cpufreq_schedutil.c |  8 +++-
 4 files changed, 76 insertions(+), 4 deletions(-)

-- 
2.26.2