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Intel Squaring Away "Hours of Battery Life" Feature For New Notebooks On Linux

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  • Intel Squaring Away "Hours of Battery Life" Feature For New Notebooks On Linux

    Phoronix: Intel Squaring Away "Hours of Battery Life" Feature For New Notebooks On Linux

    Intel's open-source Linux developers have got the Tiger Lake and Gen12 graphics support largely squared away at this point, but a few remaining features remain. One of the features new to Tigerlake/Gen12+ on the graphics side is HOBL, or "Hours of Battery Life", while the Linux support there is still being tidied up...

    http://www.phoronix.com/scan.php?pag...igerlake-Linux

  • #2
    Patented?!

    Why?! Just to not let AMD save more power?

    This looks a lot like PSR with FreeSync... What's the difference?

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    • #3
      HOBL sounds like you'd pronounce it "hobble". hah.

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      • #4
        Just HOBL along to the next article

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        • #5
          Originally posted by tildearrow View Post
          Patented?!

          Why?! Just to not let AMD save more power?

          This looks a lot like PSR with FreeSync... What's the difference?
          1. There are some pretty major differences and FreeSync is pretty much irrelevant beyond the fact that both of these technologies affect displays in some way. This is a very big deal since Tiger Lake can idle almost as low as Lakefield (Tiger does 9 mw and Lakefield does 2 mw... technically Lakefield is 4.5x lower but the absolute numbers aren't that much different). Because the CPU can idle at such low power levels, anyone who understands Amdahl's Law will recognize that the power consumption is going to be dominated by the display, peripherals, etc. This is an important feature to extend the practical battery life of many devices by... hours (hence the name).

          2. If patents are so terrible, please tell AMD to stop applying for them and open up 100% of their register files and masks to give everyone in the world free access to their technology at the transistor-level.

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          • #6
            Originally posted by chuckula View Post
            1. There are some pretty major differences and FreeSync is pretty much irrelevant beyond the fact that both of these technologies affect displays in some way. This is a very big deal since Tiger Lake can idle almost as low as Lakefield (Tiger does 9 mw and Lakefield does 2 mw... technically Lakefield is 4.5x lower but the absolute numbers aren't that much different).
            On laptops that use 4-5W in typical workloads, differences in mW absolutely does not matter. Current generation is already at super low 30mW. Those numbers are only relevant for Modern Standby. Who knows how the actual power curve is? How much does it use under C8? C6? C3? What about at various active frequency levels? Icelake is actually awesome in idle, its just that in load its not that great.

            Also Tigerlake is aimed at high performance platforms and has an on package PCH. In reality that'll make Lakefield noticeably better.

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            • #7
              Originally posted by chuckula View Post
              2. If patents are so terrible, please tell AMD to stop applying for them and open up 100% of their register files and masks to give everyone in the world free access to their technology at the transistor-level.
              I'm sure you know this, but most of what you are talking about there is protected as trade secrets, not protected by patents.

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              • #8
                is this HOBO really as good as advertised or do we have to take it with a pinch of salt like the latest intel matketing slides outburst of deceptive marketing?

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                • #9
                  Originally posted by tildearrow View Post
                  Patented?!

                  Why?! Just to not let AMD save more power?
                  The only one that is 100% left out by this is NVIDIA.
                  Intel/AMD have a cross-patent agreements as part of that x86_64 thing AMD did way back in the day. This patent may or may not be covered by it though, the details of the agreement are not public.

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                  • #10
                    So before anyone gets remotely excited have they sorted out the DPTF fiasco to go with it or are the going to ship super-whizzo graphics power management and completely cripple the resulting laptop with broken DPTF or equivalent support ?

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