Messages in this thread | | | From | Jacob Pan <> | Subject | [PATCH v2 0/3] Stop sched tick in idle injection task | Date | Mon, 14 Nov 2016 10:47:55 -0800 |
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Changelog: v2: - moved duration timer from powerclamp driver to play_idle() - unexport cpuidle_use_deepest_state - indentation fix
Idle injection drivers today use RT threads to run idle loop. There are efficiency and accounting issues with the current intel_powerclamp.c and acpi_pad.c. A while ago, I posted CFS based idle injection patch trying to address them: https://lkml.org/lkml/2015/11/13/576
Peter proposed another approach with the introduction of a PF_IDLE flag. This patchset is based on his original posting: https://lkml.org/lkml/2014/6/4/56
These patches apply on top of the kworker and cpu hotplug state machine changes made to Intel powerclamp driver. https://lkml.org/lkml/2016/10/17/362
Similar changes to ACPI PAD driver is developed along with other enhancements. It will be posted after this patchset is accepted.
Jacob Pan (2): cpuidle: allow setting deepest idle thermal/powerclamp: stop sched tick in forced idle
Peter Zijlstra (1): idle: add support for tasks that inject idle
drivers/cpuidle/cpuidle.c | 11 +++ drivers/thermal/intel_powerclamp.c | 35 +------- include/linux/cpu.h | 2 + include/linux/cpuidle.h | 4 +- include/linux/sched.h | 3 +- kernel/fork.c | 3 + kernel/sched/core.c | 1 + kernel/sched/idle.c | 177 +++++++++++++++++++++++-------------- 8 files changed, 136 insertions(+), 100 deletions(-)
-- 1.9.1
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