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Tuesday, October 6 • 11:30 - 12:20
Balancing Power and Performance in the Linux kernel - Kristen Accardi, Intel

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The things that make us go fast require power. As voltage and frequency increase to provide higher performance, power and temperature increase as well. If you could ignore thermal constraints and all you wanted to do was go as fast as possible, you would just use the highest possible frequency and voltage to get your work done. But, increased power equals increased expense in a data center, and decreased battery life in a consumer product. As a result, most people care about both power and performance. But you can't have it all.

What we need to do is find the most efficient operating state for the platform that provides both good performance and good power savings. In this talk we will start with how the platform enables this under the hood. We will then discuss how Linux selects performance states. Finally, we will talk about hardware controlled performance states.


Kristen Accardi

Intel, Intel
Kristen is a Linux OS engineer working for Intel’s Open Source Technology Center. Kristen has been a contributor to the Linux kernel for over 15 years in various different subsystems including Power Management, PCI, SATA, and ACPI. She is currently an architect and developer with the ciao project (clearlinux.org/ciao). She has spoken at many different Linux conferences worldwide, including the Linux Plumbers Conference, LinuxCon, and... Read More →

Tuesday October 6, 2015 11:30 - 12:20
Liffey Hall 1