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| author | Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> | 2009-01-27 17:38:46 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-02-06 13:47:23 -0800 |
| commit | 00559920e4bd114effb56e669690aa2479260af2 (patch) | |
| tree | 407bd186668de53614a6d4d94f821cb3dbc86c9f /kernel/rtmutex-debug.c | |
| parent | f50db0e8116410e8e7465d1810621dbf19c55ff9 (diff) | |
cpuidle: Add decaying history logic to menu idle predictor
commit 816bb611e41be29b476dc16f6297eb551bf4d747 upstream
Add decaying history of predicted idle time, instead of using the last early
wakeup. This logic helps menu governor do better job of predicting idle time.
With this change, we also measured noticable (~8%) power savings on
a DP server system with CPUs supporting deep C states, when system
was lightly loaded. There was no change to power or perf on other load
conditions.
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Cc: Thomas Renninger <trenn@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'kernel/rtmutex-debug.c')
0 files changed, 0 insertions, 0 deletions