I'm happy that scheduler-driven cpu frequency selection is getting some attention. Rafael's recent schedutil governor is a step in the right direction. This series builds on top of Rafael's schedutil governor, bringing it to parity with some of the features in the schedfreq series posted by Steve[0], as well as adding a couple of new things.
Patch 1 removes cpufreq_trigger_update() Patches 2-4 move the cfs capacity margin out of the governor and into cfs. This value is made tunable by a sysfs control in schedutil. Patches 5-6 make cpufreq_update_util() aware of multiple scheduler classes (cfs, rt & dl), and add storage & summation of these per-class utilization values into schedutil. Patches 7-8 introduces Dietmar's generic cpufreq implementation[1] of the frequency invariance hook and changes the preprocessor magic in sched.h to favor the cpufreq implementation over arch- or platform-specific ones. If accepted, this series makes it trivial to port Steve and Juri's fine-grained frequency selection in cfs and Vincent's rt utilization patch to the schedutil governor.[2-6] [0] lkml.kernel.org/r/1456190570-4475-1-git-send-email-smuc...@linaro.org [1] https://git.linaro.org/people/steve.muckle/kernel.git/commit/1b7e57f89f14f7600e75e6fde42bf22d72927b3d [2] lkml.kernel.org/r/1456190570-4475-5-git-send-email-smuc...@linaro.org [3] lkml.kernel.org/r/1456190570-4475-6-git-send-email-smuc...@linaro.org [4] lkml.kernel.org/r/1456190570-4475-7-git-send-email-smuc...@linaro.org [5] lkml.kernel.org/r/1456190570-4475-8-git-send-email-smuc...@linaro.org [6] lkml.kernel.org/r/1456190570-4475-11-git-send-email-smuc...@linaro.org Dietmar Eggemann (1): cpufreq: Frequency invariant scheduler load-tracking support Michael Turquette (7): sched/cpufreq: remove cpufreq_trigger_update() sched/fair: add margin to utilization update sched/cpufreq: new cfs capacity margin helpers cpufreq/schedutil: sysfs capacity margin tunable sched/cpufreq: pass sched class into cpufreq_update_util cpufreq/schedutil: sum per-sched class utilization sched: prefer cpufreq_scale_freq_capacity drivers/cpufreq/cpufreq.c | 29 ++++++++++++ drivers/cpufreq/cpufreq_governor.c | 5 +- drivers/cpufreq/cpufreq_schedutil.c | 70 ++++++++++++++++++++++++---- drivers/cpufreq/intel_pstate.c | 5 +- include/linux/cpufreq.h | 3 ++ include/linux/sched.h | 19 ++++++-- kernel/sched/cpufreq.c | 92 +++++++++++++++++++++++++------------ kernel/sched/deadline.c | 2 +- kernel/sched/fair.c | 18 +++++++- kernel/sched/rt.c | 2 +- kernel/sched/sched.h | 29 +++++++++--- 11 files changed, 219 insertions(+), 55 deletions(-) -- 2.1.4
