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Wednesday, October 23 • 11:05am - 11:55am
Power Capping - Keeping Linux Within Power Limits Efficiently - Jacob Pan, Intel Corp.

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Linux must operate in a world of limited power budgets. Hand-held devices must simultaneously be responsive, cool,light, and deliver long battery life. Embedded systems must be silent. Servers must maximize compute efficiency while obeying site-wide power limits. Linux infrastructure for responding to power and thermal limits is rooted in a history of these being exceptional events. How will Linux handle a future where power and thermal limits are reached in normal operation? Here we summarize the techniques available to Linux to respond to power and thermal limits, contrasting their effectiveness. We detail power-clamp, a new technique to manage power through idle injection. We show how power-clamp can provide high efficiency operation as compared to previous power capping techniques.

avatar for Jacob Pan

Jacob Pan

Linux Kernel Developer, Intel Corporation
Jacob is a veteran Linux kernel developer at Intel. His most recent interest and work are on Shared Virtual Address/Memory as well as the IOMMU subsystem in general.Prior to that, Jacob contributed to power management, device drivers, interrupt, timers, and X86 core.

Wednesday October 23, 2013 11:05am - 11:55am BST

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