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Message #00067
[Blueprint idle-injector-hotplug-research] Research idle cycle injection versus hotplug
Blueprint changed by Mounir Bsaibes:
Whiteboard changed:
Work items for 2011.07:
[mturquette] design cpuoffline framework: DONE
[mturquette] separate hotplug policy implementation from TI's cpufreq-hotplug governor: DONE
[mturquette] implement cpuoffline framework: DONE
[mturquette] implement OMAP4 support for cpuoffline framework: DONE
[mturquette] implement avg-load governor for cpuoffline framework: DONE
[mturquette] post cpuoffline patches to linux-pm list: DONE
Work items for 2011.08:
[mturquette] integrate review comments from list: DONE
[mturquette] Publish git tree with cpuoffline framework patches for integration: DONE
[mturquette] define relevant measurements to compare across implementations: DONE
- [mturquette] forward port idle cycle injector patches to linaro-2.6.39: BLOCKED
[vincent-guittot] analyze power savings with and without CPUoffline support: DONE
[mturquette] compare "raw" SMP CPUidle on Panda with the separated hotplug policy; publish the results for further discussion: INPROGRESS
These items will not be done as cpuoffline is not seen as a way to do power savings upstream.
[vincent-guittot] implement Ux500 support for CPUoffline: TODO
[amitdanielk] implement Samsung support for CPUoffline: TODO
[amitdanielk] analyze power savings with and without CPUoffline support: TODO
Idle injector info:
http://lwn.net/Articles/383368/
http://thread.gmane.org/gmane.linux.kernel/973551
Comparative analysis on SMP CPUidle versus SMP CPUidle + hotplug:
Compare power savings on VDD_MPU using some benchmarks
Compare power savings on ~VBAT using some benchmarks
+
+ The item "forward port idle cycle injector patches to linaro-2.6.39: was
+ BLOCKED", but in reality it will never happen. Google has decided to
+ drop these patches and not support them publicly.
--
Research idle cycle injection versus hotplug
https://blueprints.launchpad.net/linaro-pm-wg/+spec/idle-injector-hotplug-research