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authorPallipadi, Venkatesh <venkatesh.pallipadi@intel.com>2008-12-31 01:46:02 +0300
committerLen Brown <len.brown@intel.com>2008-12-31 02:48:01 +0300
commit816bb611e41be29b476dc16f6297eb551bf4d747 (patch)
treefe48f23db073e47a83de5e9e08796c252c7a307d /virt
parent4a6908a3a050aacc9c3a2f36b276b46c0629ad91 (diff)
downloadlinux-816bb611e41be29b476dc16f6297eb551bf4d747.tar.xz
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>
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