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Samsung Introduces "LAB" Linux Frequency Governor

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  • #16
    Originally posted by Ibidem View Post
    Myself, I use "low" profile, conservative governor (believe it or not, it actually does make a difference in temperature), and phc (with a patch for 3.8...)
    Besides that, I've got thinkpad_acpi configured to allow fan control--I use "level auto" by default, but thinkfan or a script to switch to level 7 for high loads.

    I rather wish there were a daemon that combines the features of acpid, thinkfan, and cpufreqd, so you can base settings on cpu frequency, programs running, acpi events, _and_ temperatures.

    Oh, and by the way...LAB is more-or-less like Turbo Boost, except for its relation to the nominal frequency and capabilities of the processor.
    Of course Conservative makes a difference in temperature.

    Powersave keeps it at lets say 800mhz under any load
    Ondemand lets it sit at 800mhz, but kicks it up to MAX (for me 1.6ghz) immediately under any load to get it done as fast as possible.
    Conservative sits at 800mhz, and when a load hits gradually kicks the frequency up by one step (I think a step on intel is like...50mhz? I could be totally wrong on that though) until the load is done, then it drops it back to 800mhz.

    Conservative helps temperature because you're only ever gonna hit max frequencies if its a sustained load in which case you probably WANT maximum frequency, otherwise you're sitting around middle frequency. Lower frequency = lower temperature.

    And yeah LAB is like turbo boost.

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    • #17
      Originally posted by cip91 View Post
      For people with an AMD gpu: the oss drivers keep the gpu in the "mid" or even "high" profile, even if it's not doing anything. That's because a (really) small number of gpus tend to output errors/artifacts on the "low" profile. However, this increases temperature. If you want to enable dynamic power profile or force a particular profile (you may want to, expecially on laptops), follow this steps from archwiki.
      forcing the 'low' profile does drop my GPU idle temps to 50 - 55C but the processor ends up running hotter even after cpufreq was used to lock the frequencies to 525MHz. So there's noappreciable benefit in the end,

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      • #18
        Originally posted by cip91 View Post
        For people with an AMD gpu: the oss drivers keep the gpu in the "mid" or even "high" profile, even if it's not doing anything. That's because a (really) small number of gpus tend to output errors/artifacts on the "low" profile. However, this increases temperature. If you want to enable dynamic power profile or force a particular profile (you may want to, expecially on laptops), follow this steps from archwiki.
        Of course, already doing that. Low profile and powersave governor. Still both parts run pretty hot.

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