On 13 January 2012 12:12, Jassi Brar <jaswinder.si...@linaro.org> wrote: > On 13 January 2012 16:13, Andy Green <andy.gr...@linaro.org> wrote: >> On 01/13/2012 05:59 PM, Somebody in the thread at some point said: >>> >>> Hi, >>> >>> I'd like to do some tests with cpuidle on my panda board but i'm >>> facing some issues: >>> >>> Originally, i'd like to use the Linaro developer image which uses the >>> landing team branch tilt-linux-linaro-3.1 but the omap4 cpuidle driver >>> only works when cpu1 is off whereas i'd like to do some test with both >>> cpus. >>> The android kernel has got a cpuidle driver which can enter C-states >>> when both cpus are running and I was wondering if there is a plan to >>> merge this driver into the tilt-linux-linaro-x.x branch ? maybe in 3.2 >>> ? >>> >>> Then, when I'm testing the landing-panda-11.12-release android image >>> on my panda board revA1, the cpuidle is using only C0 state (WFI) >>> according to cpuidle stats. >>> >>> My test sequence: >>> prevent suspend with: echo qwerty> /sys/power/wake_lock >>> let android enter the early_suspend mode >>> get cpuidle statistics on cpu0 et cpu1 in cpuidle/stateX/time : only >>> state0 time is different from 0 >>> >>> Is it a normal behavior ? >> >> >> No I think cpuidle is broken with what we have in tilt-3.1. >> >> It's worth trying tilt-tracking which, last time Jassi looked at it was >> working and visiting all the C states. >> > IIRC, CPU_0 entered C1, C2 states only when the CPU_1 is offline, when I > tested. > yes, but I need to keep both cpu online for my tests with sched_mc
> Vincent, would you remember exactly which android branch has it working with > both cpus online? > I'm using the the compiled baseline : https://android-build.linaro.org/builds/~linaro-android/landing-panda-11.12-release/#build=3 For this baseline, a cpuidle device is registered for each CPU (0,1) unlike the tilt tracking which register a device only for cpu0. This baseline uses an other cpuidle driver for omap4 which manages both CPU Vincent > Cheers, > Jassi _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
