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Linux 3.11 May Lower Intel Power Consumption

Linux Kernel

Published on 26 July 2013 04:49 PM EDT
Written by Michael Larabel in Linux Kernel
16 Comments

It's still being investigated, but early indications are that the Linux 3.11 kernel is consuming less power at least for Intel CPUs.

As part of my usual Linux kernel benchmarking roundabout, I've been testing the power consumption on the Linux 3.11 kernel compared to its predecessor. On an ASUS Ultrabook with Intel Core i3 "Ivy Bridge" processor, the power consumption is doing better than with the Linux 3.9 and Linux 3.10 kernels.

Testing is still ongoing and I'm in the process of testing out Intel Sandy Bridge and older notebooks to see if the lower power trend continues there, hence just this quick one-page posting before the weekend.


Those interested in the Intel Ultrabook power consumption numbers on Linux 3.11 along with some other benchmarks, they can be found on OpenBenchmarking.org within 1307262-SO-LINUX311K00.


With the Phoronix Test Suite it's easy to reproduce this testing by just setting the PERFORMANCE_PER_WATT=1 and MONITOR=sys.power environment variables and then run any and all benchmarks you wish to simultaneously matter the Linux battery power consumption via ACPI (or a USB-based WattsUp power meter).


Stay tuned for more information over the weekend and next week on Phoronix as the Linux 3.11 kernel power consumption is explored in closer detail while now you can analyze the current data.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
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