| Publisher | Intel | ||
|---|---|---|---|
| Format | 88.0KB PDF | Date added | 15 Aug 2007 |
| Topics | Microprocessors, Processors, Linux - Open Source | ||
| Downloads | 73 | ||
Power savings is a key focus area in today's microprocessors, with almost all latest microprocessors providing wide variety of power saving features. Processor P-state is the capability of running the processor at different voltage and/or frequency levels. Processor C-state is the processor capability to go into various low power idle states (with varying wakeup latency). Linux kernel policies like cpufreq-ondemand governor and cpuidle-menu governor make effective use of these processor power management features, giving power savings to the end user. This paper looks at various inter-relations between Linux power management features and process scheduler. In particular, it covers various issues and mechanisms for incorporating power management related information in process scheduler.
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