Another look at HPET High Precision Event Timer

Discussion in 'Videocards - NVIDIA GeForce Drivers Section' started by Bukkake, Sep 18, 2012.

  1. mbk1969

    mbk1969 Ancient Guru

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    Also try to toy with interrupt priority (for audio card?), please. Since nobody knows what exactly that setting affects (and whether affects at all)...
     
  2. vigan1

    vigan1 Member

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    Yes I will see.
    I don't know what it is for, but I will change the settings and see If it does change anything when I record or use the audio card in a realtime playback scenario (with multiple realtime effects, like a compressor and equalizer).
    But don't expect too much from me I am not that well versed in computer science.
    But I will definitely see if it make a different as in realtime audio DPC or ISR spike cause "crackles" in the audio. I will also check in LatencyMon.
     
  3. mbk1969

    mbk1969 Ancient Guru

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    More detailed way comparing to LatencyMon
    https://forums.guru3d.com/threads/simple-way-to-trace-dpcs-and-isrs.423884/
     
  4. vigan1

    vigan1 Member

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    Hi from tomorrow I will start testing if msi drivers make a difference I am curious too.
    By the way is there a way to see before installing if a driver is msi mode compatible ?
     

  5. mbk1969

    mbk1969 Ancient Guru

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    Only by searching inf-files for "MSISupported" values. If it is set to "1" (or "0") then MSI mode is "forced" on (or off). But if there is no "MSISupported" it does not mean driver is compatible or not - it can be both.
     
    Last edited: Aug 30, 2020
  6. vigan1

    vigan1 Member

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    Ok Thank you.
     
  7. mbk1969

    mbk1969 Ancient Guru

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  8. felicityc

    felicityc New Member

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    Yes... I am here, once again. To say something about this. I recently did several benchmarks, clear of mind, finally free of latency groups, finally free of outside influences. To see for myself if my previous assumptions on this issue were true.

    My conclusion was...

    drum roll....


    ...

    disabledynamictick reduces performance.
    useplatformclock reduces performance, even with hpet enabled in bios.
    useplatformtick makes no difference, hpet on or off.

    Thus, Martigen's post is absolutely the correct answer, and none of these values should even be set to 'off'. Simply delete them all. There are very rare cases where hpet on and the platformclock might be relevant.

    HPET off or on in bios is also irrelevant. I have left it off for peace of mind.

    I tossed my benchmark results because they were insultingly inconclusive.

    Felt like I needed closure so there ya go. Want to add my 0.00001 bitcoin into the mix of anyone who stumbles on this confusing as frack thread.
     
  9. cloakengaged

    cloakengaged Member

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    newest windows 10 installation.

    game : valorant - training map / avarage fps 260

    after i set useplatformclock no -avg fps => 350.

    no. windows does not detect "the best one for you". everyone should try and find the best one for their hardware. it just takes a couple mins to do so anyway.
     
  10. mbk1969

    mbk1969 Ancient Guru

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    Ancient hardware?

    PS
    Also Windows detects not best for "you" but best for itself. Only reason to not select TSC as an implementation for QueryPerformanceCounter is a TSC vulnerable to C-states or P-states. If Windows failed to detect so called Invariant TSC it selects other counter/timer to avoid problems with "floating" TSC.

    PPS But I completely agree with your last sentences "everyone should try and find the best one for their hardware. it just takes a couple mins to do so anyway."
     
    Last edited: Sep 9, 2020

  11. marcosamerio

    marcosamerio Master Guru

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    HI, ¿how i can check the values i have for bcdedit /deletevalue disabledynamictick, bcdedit /deletevalue useplatformclock, bcdedit /deletevalue useplatformtickin in w10?
     
  12. mbk1969

    mbk1969 Ancient Guru

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    It is not clear what exactly are you asking - how to check whether values were deleted (from BCD) or how to check what has changed in system after the deletion.
     
  13. marcosamerio

    marcosamerio Master Guru

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    Hi, thanks for the answer, i would like to to know wich values i have before doing changes.
     
  14. mbk1969

    mbk1969 Ancient Guru

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    BCD values "disabledynamictick", "useplatformclock", "useplatformtick" can be in 3 states:
    - absent, not set (default state);
    - "yes";
    - "no".

    To check them you have to execute command "bcdedit" in elevated command prompt. If you do not see a value it is absent (is not set).
     
  15. marcosamerio

    marcosamerio Master Guru

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    Thanks again for answer me, one last question, ¿where or how i can compare perfomance?
     

  16. mbk1969

    mbk1969 Ancient Guru

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    Games, benchmarks.
     
  17. marcosamerio

    marcosamerio Master Guru

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    Thanks.
     
  18. janos666

    janos666 Master Guru

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    A bit off topic but my Ryzen 2500U based notebook is sluggish (especially FireFox) after waking from suspend. I think this started with 20H1 (I also have the 20H2 ennoblement package but I think it started before that). I wonder if you 'tweakers' might have some ideas about that.
     
  19. mbk1969

    mbk1969 Ancient Guru

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    Why don`t create dedicated thread?
     

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