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Kaby Lake On Linux Plays Much Better With CPUFreq Than P-State

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  • Kaby Lake On Linux Plays Much Better With CPUFreq Than P-State

    Phoronix: Kaby Lake On Linux Plays Much Better With CPUFreq Than P-State

    After ordering a Core i5 7600K Kaby Lake CPU last week, I've been spending the past few days trying it out under Ubuntu Linux. If you happened to pick up an early Kaby Lake CPU and seeing low performance, I wanted to pass along a little PSA while I am still working on additional tests.

    http://www.phoronix.com/vr.php?view=24009

  • #2
    Why can't PState just work?
    At least don't make it default if it's so badly broken...
    ## VGA ##
    AMD: X1950XTX, HD3870, HD5870
    Intel: GMA45, HD3000 (Core i5 2500K)

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    • #3
      I have the i5-6600 (not the K) and it's for sure the best cpu I've owned. I am sticking with this until I see a compelling reason to upgrade. So far, none.

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      • #4
        Interesting; now I’m thinking I should do a couple tests to compare intel_pstate and cpufreq on my i5 4690K…

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        • #5
          Debian unstable with Haswell i3 and i5. Should I install cpufreqd?
          Any settings changes to make?
          I'm tempted...

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          • #6
            Looking forward to the upcoming tests...

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            • #7
              Michael
              Why don't you use an i7-6700k in your benchmarks?
              Wouldn't it be the right one to sum up Kaby Lake performance?
              (And maybe make the lesser Kaby Lakes unnecessary?)

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              • #8
                Originally posted by Ronshere View Post
                Michael
                Why don't you use an i7-6700k in your benchmarks?
                Wouldn't it be the right one to sum up Kaby Lake performance?
                (And maybe make the lesser Kaby Lakes unnecessary?)
                Because I have no 6700k? Intel never sent me any Skylake samples and at the time I had no budget for anything above the 6600k.
                Michael Larabel
                http://www.michaellarabel.com/

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                • #9
                  I like how Michael tests what it looks like all the processors there are...
                  Loads of work.
                  But paints a bigger picture.

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                  • #10
                    Originally posted by phoronix View Post
                    Phoronix: Kaby Lake On Linux Plays Much Better With CPUFreq Than P-State

                    After ordering a Core i5 7600K Kaby Lake CPU last week, I've been spending the past few days trying it out under Ubuntu Linux. If you happened to pick up an early Kaby Lake CPU and seeing low performance, I wanted to pass along a little PSA while I am still working on additional tests.

                    http://www.phoronix.com/vr.php?view=24009
                    Settings used in the article:

                    - Core i5 7600K: Scaling Governor: intel_pstate powersave
                    - Core i5 7600K - CPUFreq Performance: Scaling Governor: acpi-cpufreq performance

                    According to intel-pstate.txt:

                    pstate powersave is similar to cpufreq ondemand
                    pstate performance is similar to cpufreq performance
                    Conclusion:
                    pstate powersave is not similar to cpufreq performance

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