** Description changed: SRU Justification: - Impact: Users would like to be able to use fastsleep and winkle cpuidle states in the 3.16 Ubuntu kernel when using powernv. - Fix: + + [Impact] + Users would like to be able to use fastsleep and winkle cpuidle states in the 3.16 Ubuntu kernel when using powernv. + + [Fix] commits d6a4f70909d279004a2b3d539e240e07b1ecc1cb 56548fc0e86cb9156af7a7e1f15ba78f251dafaf 8117ac6a6c2fa0f847ff6a21a1f32c8d2c8501d0 8eb8ac89a364305d05ad16be983b7890eb462cc3 *backported* 7cba160ad789a3ad7e68b92bf20eaad6ed171f80 *backported* 77b54e9f213f76a23736940cf94bcd765fc00f40 upstream + + [Test Case] + Testing fastsleep + ----------------- + With these patches cpuidle framework picks up fastsleep as one of the idle states. You can observe the cpus entering fastsleep by checking + /sys/devices/system/cpu/cpuXX/cpuidle/state2/name. This should show FastSleep. + Then while system is idle check /sys/devices/system/cpu/cpuXX/cpuidle/state2/time increment over time + This shows the amount of time a particular cpu was in fastsleep. + + Testing Winkle + -------------- + With these patches, offline cpus enter winkle. So test this by offlining and onlining cpus. + ppc64_cpu --cores-on=1 + ppc64_cpu --cores-on=X where X is the total number of cores available in the machine. -- This is a feature request to enable power management features fastsleep and winkle cpuidle states in ubuntu -14.04.02 kernel. The cpuidle state management patches have been posted to Linux Kernel Community. Mailing list: [PATCH 0/4] powernv: cpuidle: Redesign idle states management https://lists.ozlabs.org/pipermail/linuxppc-dev/2014-November/122433.html Patchset: [1/4] powerpc: powernv: Switch off MMU before entering nap/sleep/rvwinkle mode https://patchwork.ozlabs.org/patch/406249/ [2/4] powerpc/powernv: Enable Offline CPUs to enter deep idle states https://patchwork.ozlabs.org/patch/406250/ [3/4] powernv: cpuidle: Redesign idle states management https://patchwork.ozlabs.org/patch/406256/ [4/4] powernv: powerpc: Add winkle support for offline cpus https://patchwork.ozlabs.org/patch/406251/
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1400411 Title: Feature: cpuidle: Enable fastsleep and winkle in ubuntu 14.04.02 kernel To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1400411/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
