Linux 4.17 seems to be more energy-efficient

Apr

16

2018

The Linux 4.17-rc1 kernel has appeared in the run-up to the stable release, which is likely to be expected mid-June. One of the improvements concerns energy management; Linux seems to consume less in idle mode.

Rafael J. Wysocki from Intel, who manages the acpi subsystem of Linux, reports in an explanation of the improvements in energy management that in particular the idle loop has been rebuilt , to prevent cpu’s from spending too much time in less efficient idle modes. . “This reduces idle consumption on some systems by 10 percent or more,” he writes on the Linux Kernel mailing list.

Phoronix took the test and submitted a Lenovo ThinkPad X1 Carbon laptop with a fuel-efficient Core i7 from the Broadwell generation to a test with Linux 4.15, 4.16 and 4.17 Git. In idle mode, the laptop indeed consumed significantly less , so the operating system may close the gap with Windows that has arisen. A server with two Xeon Gold 6138 processors also showed improvements in consumption with Linux 4.17, both idle and during use.

Linus Tovalds officially announced Linux 4.17-rc1, noting that it is not a particularly large release, but that the Linux community has been phasing the limit of six million git objects. “That is reason enough to mention the next kernel 5.0, except that I probably will not do that because I do not want to be too predictable.”

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