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Message #00371
[Blueprint cpuidle-p-state-dependency-investigation] cpuidle p-state dependency investigation
Blueprint changed by Daniel Lezcano:
Whiteboard changed:
[amitk, 29/11/2012]: Daniel does this make sense to take on at this
point? Or should we leave in backlog?
[daniel-lezcano, 25/03/2013]: the exit_latency has been provided by the
cpuidle driver author. These measurements were done but I don't know in
which context (w/o cpufreq, ondemand/performance/userspace/etc ...). It
is probable, we have to recheck these exit latency values depending of
the frequency.
[daniel-lezcano, 12/04/2013] : one solution would be to measure the exit
latency for different states at different frequency in the kernel at
boot time and use these measured values to fill the exit_latency. The
cpufreq notifiers will be used in the cpuidle framework to change the
exit_latency dynamically.
+
+ [daniel-lezcano, 17/04/2013] : the question is how do you measure the
+ exit latency ?
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cpuidle p-state dependency investigation
https://blueprints.launchpad.net/linaro-power-kernel/+spec/cpuidle-p-state-dependency-investigation