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authorLen Brown <len.brown@intel.com>2007-12-14 00:24:15 -0500
committerLen Brown <len.brown@intel.com>2007-12-14 00:24:15 -0500
commit25de5718356e264820625600a9edca1df5ff26f8 (patch)
tree8ff2520cfa979efcc84c69a7bd3b74a0a8370cfc /drivers/cpuidle
parent4963f62045b64f93c45fbcb6f8f0baf1e3e7a127 (diff)
cpuidle: default processor.latency_factor=2
More aggressively request deep C-states. Note that the job of the OS is to minimize latency impact to expected break events such as interrupts. It is not the job of the OS to try to calculate if the C-state will reach energy break-even. The platform doesn't give the OS enough information for it to make that calculation. Thus, it is up to the platform to decide if it is worth it to go as deep as the OS requested it to, or if it should internally demote to a more shallow C-state. But the converse is not true. The platform can not promote into a deeper C-state than the OS requested else it may violate latency constraints. So it is important that the OS be aggressive in giving the platform permission to enter deep C-states. Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/cpuidle')
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