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Message #00333
[Blueprint idle-injector-hotplug-research] Research idle cycle injection versus hotplug
Blueprint changed by Serge Broslavsky:
Whiteboard changed:
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.
- [daniel-lezcano, Jan 15th, 2013] Intel has posted a patch series for "Intel power clamp":
- * http://lwn.net/Articles/524668/
+ [daniel-lezcano, 2013-01-15] Intel has posted a patch series for "Intel power clamp":
+ * http://lwn.net/Articles/524668/
It is worth study the approach as it could fit our needs to 'sync' the cpus for idling a package.
+
+ [ototo, 2013-02-01] Moving unfinished items to 2013.02.
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Research idle cycle injection versus hotplug
https://blueprints.launchpad.net/linaro-power-kernel/+spec/idle-injector-hotplug-research