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AMD Schedutil vs. Performance Governor Benchmarks On Linux 5.11 Shows More Upside Potential

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  • ehsn_mhr
    replied
    will kernel 5.11 helps amd 3000 mobile cpus to not overheat and freeze?

    Leave a comment:


  • Vistaus
    replied
    Originally posted by andreano View Post

    Check if it is enabled in your kernel:

    Code:
    zcat /proc/config.gz | grep SCHEDUTIL
    CONFIG_CPU_FREQ_DEFAULT_GOV_SCHEDUTIL=y 
    CONFIG_CPU_FREQ_GOV_SCHEDUTIL=y
    It says:
    gzip: /proc/config.gz: No such file or directory

    Leave a comment:


  • andreano
    replied
    I want a CPU governor that ignores "nice" load.

    Edit: Some searching later:

    Code:
    echo 1 | sudo tee/sys/devices/system/cpu/cpufreq/ondemand/ignore_nice_load
    Last edited by andreano; 29 January 2021, 03:17 PM.

    Leave a comment:


  • andreano
    replied
    Originally posted by Vistaus View Post
    schedutil still doesn't appear in the list of available governors
    Check if it is enabled in your kernel:

    Code:
    zcat /proc/config.gz | grep SCHEDUTIL
    CONFIG_CPU_FREQ_DEFAULT_GOV_SCHEDUTIL=y 
    CONFIG_CPU_FREQ_GOV_SCHEDUTIL=y

    Leave a comment:


  • Vistaus
    replied
    Originally posted by ciupenhauer View Post

    intel_pstate=passive in the kernel boot parameter list
    Thanks, I tried that, but schedutil still doesn't appear in the list of available governors.

    Leave a comment:


  • ciupenhauer
    replied
    Originally posted by Vistaus View Post
    How can I enable schedutil on Intel? It doesn't appear in the available governors list (using both kernel 5.4 and 5.10).
    intel_pstate=passive in the kernel boot parameter list

    Leave a comment:


  • Vistaus
    replied
    How can I enable schedutil on Intel? It doesn't appear in the available governors list (using both kernel 5.4 and 5.10).

    Leave a comment:


  • milkylainen
    replied
    As I suspected. Not impressed.
    Idle power not changed, working power not optimized (beside actual loss of performance),
    too many corner cases and just adding code.
    Nope.
    Will still run performance thank you.

    Leave a comment:


  • brent
    replied
    Originally posted by andrei_me View Post

    My gut feeling is better idle efficiency
    No, idle power usage is the same. P-state scheduling doesn't affect C-states. Efficiency might be a bit better with some "spiky" loads with many wakeups, but still lots of idle time, though.

    Overall... I'm still not impressed by schedutil, not at all. A CPPC2 based scheduler has some intrinsic advantages and should result in some actually tangible differences. Hope we'll see it some day.

    Leave a comment:


  • darkbasic
    replied
    Why can't Linux enter the 21th century and implement continuous integration like everyone else? Obviously you can't test everything but some regressions are simply too obvious to be ignored.

    Leave a comment:

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