Embedded Linux Power Management on the Intel Atom ... - MontaVista

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Mitigate wakeups with <strong>Power</strong>top
Recommended Reading • Less Watts: Intel's <strong>Linux</strong> <strong>Power</strong> <strong>Management</strong> website • http://lesswatts.org • Open Device, Insert Code • http://www.mvista.com/blogs/dixon • Benchmarking of Dynamic <strong>Power</strong> <strong>Management</strong> Systems Frank Dols CELF <strong>Embedded</strong> <strong>Linux</strong>® Conference 2007 Linked from http://www.mvista.com/power
Page 1 and 2: Embedded L
Page 3 and 4: Why care about Power</stron
Page 5 and 6: Power is a large f
Page 7 and 8: How we save power Two big ways: •
Page 9 and 10: ACPI / cpufreq Software Architectur
Page 11 and 12: ACPI • ACPI is an open-industry s
Page 13 and 14: What is Deep Power
Page 15 and 16: L2 Dynamic Cache Sizing OS ACPI 8-W
Page 17 and 18: Enumerate System Devices You'll nee
Page 19 and 20: Identify Constraints Are there rela
Page 22 and 23: Define Power <stro
Page 24 and 25: Stitching it together • CPUfreq
Page 26 and 27: The Governor • Task: Decide how a
Page 28 and 29: ondemand Governor Example
Page 30 and 31: Making Drivers Power</stron
Page 32 and 33: cpufreq Notifications • Your driv
Page 34 and 35: Saving power during idle • Idle S
Page 38 and 39: Free for the asking... “MontaVist

Embedded Linux Power Management on the Intel Atom ... - MontaVista

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