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| author | Alex Chiang <achiang@hp.com> | 2009-10-21 21:45:36 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-10-30 14:59:52 -0700 |
| commit | e6dcfa7c61c4d31797a12d738bfe0bdec0ca2be1 (patch) | |
| tree | 276ff03cba0298dce1b790b278f682c84c91797a /Documentation | |
| parent | 663fb2fc733006f685400fb44551303b72b61a88 (diff) | |
| download | lwn-e6dcfa7c61c4d31797a12d738bfe0bdec0ca2be1.tar.gz lwn-e6dcfa7c61c4d31797a12d738bfe0bdec0ca2be1.zip | |
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 <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>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-devices-system-cpu | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu index 2ade5c0809a0..8cdda1c56980 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 <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 /sys/devices/system/cpu/offline |