linaro-pm-wg team mailing list archive

[Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>]

Blueprint changed by Daniel Lezcano:

Whiteboard set to:
Discussion results:
* identify all interrupts waking up a cpu
  => https://wiki.linaro.org/WorkingGroups/PowerManagement/Doc/WakeUpSources
* reduce the number of interrupt
  * timer irq affinity
  => https://blueprints.launchpad.net/linaro-power-kernel/+spec/cpuidle-dynamic-timer-irq-affinity
  * timer and workqueue migration to non idle cpus
  => https://blueprints.launchpad.net/linaro-big-little-system/+spec/timer-workqueue-cpu-quiescent
* solution is suitable when:
   * cpuset groups cpus per cluster
   * cpuidle supports deep idle state (powerdown)
* solution is suitable for b.L to:
   * move the policy in the userspace
   * low latency to switch the cluster is not critical
* a prototype has been made
* a study has been done:
   => elinux.org/images/a/a3/Lcjp2013_nakagawa.pdf‎

-- 
Using cgroups/cpusets to save power
https://blueprints.launchpad.net/linaro/+spec/linaro-powermgt-discussion-using-cgroups-for-saving-power