From: Alex Chiang Date: Thu, 22 Oct 2009 03:45:36 +0000 (-0600) Subject: Documentation: ABI: /sys/devices/system/cpu/sched_[mc|smt]_power_savings X-Git-Tag: upstream/snapshot3+hdmi~16691^2~2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e6dcfa7c61c4d31797a12d738bfe0bdec0ca2be1;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git Documentation: ABI: /sys/devices/system/cpu/sched_[mc|smt]_power_savings Document sched_[mc|smt]_power_savings by reading existing code and git logs. Cc: Suresh Siddha Cc: Ingo Molnar Signed-off-by: Alex Chiang Signed-off-by: Greg Kroah-Hartman --- diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu index 2ade5c0..8cdda1c 100644 --- a/Documentation/ABI/testing/sysfs-devices-system-cpu +++ b/Documentation/ABI/testing/sysfs-devices-system-cpu @@ -9,6 +9,30 @@ Description: /sys/devices/system/cpu/cpu#/ +What: /sys/devices/system/cpu/sched_mc_power_savings + /sys/devices/system/cpu/sched_smt_power_savings +Date: June 2006 +Contact: Linux kernel mailing list +Description: Discover and adjust the kernel's multi-core scheduler support. + + Possible values are: + + 0 - No power saving load balance (default value) + 1 - Fill one thread/core/package first for long running threads + 2 - Also bias task wakeups to semi-idle cpu package for power + savings + + sched_mc_power_savings is dependent upon SCHED_MC, which is + itself architecture dependent. + + sched_smt_power_savings is dependent upon SCHED_SMT, which + is itself architecture dependent. + + The two files are independent of each other. It is possible + that one file may be present without the other. + + Introduced by git commit 5c45bf27. + What: /sys/devices/system/cpu/kernel_max /sys/devices/system/cpu/offline