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Thread: "Cryogenic" Linux Kernel Drops Power Use

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  1. #1
    Join Date
    Jan 2007
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    14,646

    Default "Cryogenic" Linux Kernel Drops Power Use

    Phoronix: "Cryogenic" Linux Kernel Drops Power Use

    Announced today was the "Cryogenic" module for the Linux kernel that claims to lower power consumption of Linux systems...

    http://www.phoronix.com/vr.php?view=MTYzNjU

  2. #2
    Join Date
    Feb 2014
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    5

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    Münchner Bier - Prost

  3. #3
    Join Date
    Jan 2009
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    Outthere, NSW, Australia
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    350

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    I was beer was the new international currency, and not BitCoin.

    And that my linux kernel would keep it cold.

  4. #4
    Join Date
    Sep 2008
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    Vilnius, Lithuania
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    That's a nice image of a Zalman cooler there.

  5. #5
    Join Date
    Dec 2012
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    457

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    I thought we already had that?

    Quote Originally Posted by /usrs/src/linux/Documentation/laptops/laptop-mode.txt
    Laptop mode is controlled by the knob /proc/sys/vm/laptop_mode. This knob is present for all kernels that have the laptop mode patch, regardless of any configuration options. When the knob is set, any physical disk I/O (that might have caused the hard disk to spin up) causes Linux to flush all dirty blocks. The result of this is that after a disk has spun down, it will not be spun up anymore to write dirty blocks, because those blocks had already been written immediately after the most recent read operation. The value of the laptop_mode knob determines the time between the occurrence of disk I/O and when the flush is triggered. A sensible value for the knob is 5 seconds. Setting the knob to 0 disables laptop mode.

  6. #6
    Join Date
    Apr 2011
    Posts
    156

    Default

    Maybe the difference lies in the fact that "cryogenic" can be used by applications "on demand" (?)

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