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Documentation: ABI: /sys/devices/system/cpu/sched_[mc|smt]_power_savings

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Document sched_[mc|smt]_power_savings by reading existing code and
git logs.

Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alex Chiang
2009-10-21 21:45:36 -06:00
committed by Greg Kroah-Hartman
parent 663fb2fc73
commit e6dcfa7c61
1 changed files with 24 additions and 0 deletions
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@@ -9,6 +9,30 @@ Description:
/sys/devices/system/cpu/cpu#/ /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 <linux-kernel@vger.kernel.org>
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 What: /sys/devices/system/cpu/kernel_max
/sys/devices/system/cpu/offline /sys/devices/system/cpu/offline