| commit | 816bb611e41be29b476dc16f6297eb551bf4d747 | |
| author | Pallipadi, Venkatesh <venkatesh.pallipadi@intel.com> | |
| Tue, 30 Dec 2008 22:46:02 +0000 (30 14:46 -0800) | ||
| committer | Len Brown <len.brown@intel.com> | |
| Tue, 30 Dec 2008 23:48:01 +0000 (30 18:48 -0500) | ||
| tree | fe48f23db073e47a83de5e9e08796c252c7a307d | treesnapshot (tar.gz zip) |
| parent | 4a6908a3a050aacc9c3a2f36b276b46c0629ad91 | commitdiff |
cpuidle: Add decaying history logic to menu idle predictor
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>
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>
| drivers/cpuidle/governors/menu.c | diffblobblamehistory |