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Looking At The Power Use From Linux 4.6 To Linux 4.15

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  • Looking At The Power Use From Linux 4.6 To Linux 4.15

    Phoronix: Looking At The Power Use From Linux 4.6 To Linux 4.15

    In addition to looking at system boot times from Linux 4.6 to Linux 4.15, while doing this kernel testing session on the Lenovo ThinkPad I also took some battery power consumption measurements...

    http://www.phoronix.com/scan.php?pag...-Battery-Power

  • #2
    It could also be interesting to have these measurements with tlp. So one run stock and one run with tlp. Maybe tlp will trigger more energy saving techniques in newer kernels?

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    • #3
      I appreciate the testing but shouldn't you at least let them shut the merge window. It seems very possible that not everything might be in the kernel yet to make this all work.

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      • #4
        Also makes me wonder if this varies per distro, like does Fedora do better or worse

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        • #5
          Michael What exact method are you / is PTS using to measure the power usage here?

          Of the methods provided on http://www.thinkwiki.org/wiki/How_to...er_consumption, I found that the `/sys/devices/platform/smapi/BAT0/power_now` method seems much better than the /proc/acpi/battery/BAT0/* method; it has much lower latency (a few seconds instead of minutes).

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          • #6
            Originally posted by nh2_ View Post
            Michael What exact method are you / is PTS using to measure the power usage here?

            Of the methods provided on http://www.thinkwiki.org/wiki/How_to...er_consumption, I found that the `/sys/devices/platform/smapi/BAT0/power_now` method seems much better than the /proc/acpi/battery/BAT0/* method; it has much lower latency (a few seconds instead of minutes).
            The sysfs interface.
            Michael Larabel
            https://www.michaellarabel.com/

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