Windows 8 High DPC latency Fix

Discussion in 'Videocards - NVIDIA GeForce Drivers Section' started by Penal Stingray, Jan 27, 2013.

  1. mbk1969

    mbk1969 Ancient Guru

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    Invariant TSC guarantees that after the CPU reset all cores` TSC are ticking in sync.
     
  2. dsbig

    dsbig Ancient Guru

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    when using disabledynamictick yes. when my rig is idle. latency goes from 60 too
    160.

    with disabledynamictick no its around 100 most of the time


    I disable turboboost on my cpu and the latency will stay around 20-40
     
    Last edited: Jul 30, 2013
  3. Elajitz

    Elajitz Master Guru

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    Okay will the OS/Computer preform better in games
    And stuff?
     
  4. Xtreme512

    Xtreme512 Master Guru

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    yes but its hard to feel it.
     

  5. -Tj-

    -Tj- Ancient Guru

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  6. dsbig

    dsbig Ancient Guru

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    its not a bad tweak.

    I have some games/programs that respond faster when its enabled, compared to when its disabled.
     
  7. BenYeeHua

    BenYeeHua Ancient Guru

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    Read this.
    http://www.tweakhound.com/2013/07/15/bad-tweak-core-parking/
    And this is what's I post at the other forum.
    And I has been follow this topic for a long time.
    Another look at HPET High Precision Event Timer
    http://forums.guru3d.com/showthread.php?t=368604
    This is what's I know.

    I am using Nightly(Firefox) GC time and OSU! FPS to test this, and the memory usage for Nightly is 3xxMB.

    useplatformclock true
    For windows 7, the GC/iGC time is the same(1xxms GC time), but the OSU! FPS has become more stable.
    For windows 8, the GC/iGC time increased(From 60-70ms increased to 1xxms GC time), the OSU! FPS has been reduced, but more stable.
    ----
    And this is what I get too.

    I has been asking 5+ gamer that, why they switch to Windows 8.
    They answer are the same.
    "Because I found many games FPS has been increased."
    And so did I.(25-30FPS with Planetside 2 while the Alert is on.)

    I think it can be Windows 8 start using Invariant TSC more than HPET.

    If you don't believe, just install Firefox and the add-on "MemChaser".
    Click the MemChaser that showing on the Add-on Bar, click Reduce Memory.
    See what is the difference for the GC time, with only windows 8.:)

    PS:Remember to disable Core-Parking and also keep the same CPU and RAM setting.
     
  8. Audio

    Audio New Member

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    Can anyone help me out ? compaired to all of yours mines seems terrible...and i can't seem to get it to go any lower. Using my studio monitor if I lower or raise the volume i hear a crackle [​IMG]
     
    Last edited: Aug 20, 2013
  9. BenYeeHua

    BenYeeHua Ancient Guru

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    So bad that I has to tell you, disable the WiFi.
     
  10. Audio

    Audio New Member

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    ah, thats not to bad im close to my ethernet whenever im doing anything on my studios, thanks for the tip m8
     

  11. Xtreme512

    Xtreme512 Master Guru

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    most of the cases if you are using desktop pc..

    only disable dynamic tick, do not touch the (dont use) platformclock as it will stay off in windows.
    and enable hpet in bios if there is any.

    ;) its the best
     
  12. sniggle

    sniggle Active Member

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    Installed Windows 8.1 x64, disabled dynamictick, and it appears that dpclat.exe no longer reports anything below 1000µs. LatencyMon does appear to still measure things correctly (mostly at ~100µs). Not sure if that's a bug with dpclat.exe or if this tweak no longer works correctly on 8.1. Anyone else have a similar situation?
     
  13. -Tj-

    -Tj- Ancient Guru

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    ^
    Its a application issue, try latest Latencymon v5.

    Nah I just found it funny ^



    I dont take his words for granted anyway.. I used platformclock ON in windows7 for a long time and it was the best scenario for my old quadcore..
     
  14. Corrupt^

    Corrupt^ Ancient Guru

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    The program is bugged and will report spikes of 1000 or even a continues 1000, but it's actually not 1000 at all.
     
  15. drbaltazar

    drbaltazar Banned

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    1:invariant tsc!if you disable hpet in bios and disable all powersaving feature in windows invariant tsc is on by default!
    2:if you want to have most precise timing (dynamictic off etc)just disable window time sync
    hopefully this help she some light ! you don't need to use bcdedit setting when it say for debugging!usually it means there is an alternate approved method ms include in the os or the bios!you have to find how!
     

  16. advocation

    advocation New Member

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    Sorry to revive an old thread...but was hoping for some help. I have a brand new Win 8.1 install, with drivers only from MSI's website. I'm getting popping noise before sounds first start (all brand new parts/build). Windows is set to Performance. (can't post images yet)
    i.imgur.com/NFQOics.png
    i.imgur.com/7agGDhr.png

    specs:
    Win 8.1
    Z87-GD65
    i7 4770K
    16GB Crucial Ballistix

    Intel Burn-in/Prime95/Memtest all pass without issues.
     
  17. Corrupt^

    Corrupt^ Ancient Guru

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    Use latencymonitor to troubleshoot, not DPC latency. Solved a fair few issues this way, but DPC latency checker is useless atm on W8.
     
  18. advocation

    advocation New Member

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    This was using LatencyMon (imgur screenshots in last post are from this) -- Is there a different program to use? If so, can you link it (as google just comes up with LatencyMon when you type in latency monitor).

    Thanks!
     
    Last edited: Jan 16, 2014
  19. ColdFlo

    ColdFlo Banned

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    LOL this thread still going so many noob to windows 8 prolly not even 8.1 nooobs...... DPCLatencyChecker uses old kernel timing monitoring/reporting Win8/8.1 does not have latency problems it is faster in every way you are just clinging to the fact you are stuck in rut and once you lose your start mouse maze menu where one mistake you have to start all over you lose all bearings on what is reality and you freak out!!!!! LOL
     
  20. Pvfc-Epic

    Pvfc-Epic Maha Guru

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    would you mind speaking english or any language that isnt redneck? :bang:
     

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