Windows 8 and 8.1 Forums


is this 1ms+ DPC Latency normal?

  1. #1


    Posts : 40
    Windows 8.1 Pro x64

    is this 1ms+ DPC Latency normal?


    I see lots of people going on about DPC Latency in Windows 8 not going below 1ms (1000us)... I have seen it on a few windows 8 machines ive tested..

    heres Windows 8 installed on my computer :




    heres XP installed :




    what is the problem here?


    thanks

      My System SpecsSystem Spec

  2. #2


    Posts : 124
    Windows 8 Pro 64-Bit


    DPC Latency Checker

    Windows 8 Compatibility: The DPC latency utility runs on Windows 8 but does not show correct values. The output suggests that the Windows 8 kernel performs badly and introduces a constant latency of one millisecond which is not the case in practice. DPCs in the Windows 8 kernel behave identical to Windows 7. The utility produces incorrect results because the implementation of kernel timers has changed in Windows 8 which causes a side effect with the measuring algorithm used by the utility. Thesycon is working on a new version of the DPC latency utility and will make it available on this site as soon as it is finished.

    DPC Latency Checker for Windows 7, Windows 7 x64, Windows Vista, Windows Vista x64, Windows Server 2003, Windows Server 2003 x64, Windows XP, Windows XP x64, Windows 2000
    Please don't take my response as rude not my intention but, always double check software compatibility, the first thing that came to my mind was probably a incompatibility issue no way this is win8 performing worse than it's predecessor.
      My System SpecsSystem Spec

  3. #3


    Posts : 13
    Windows 8 Pro


    The DPC latency checker wasn't working with windows 8 earlier this month. It said so on the website.
      My System SpecsSystem Spec

  4. #4


    Posts : 40
    Windows 8.1 Pro x64


    many thanks... I suspect you just remove 1ms and you get your result...in which case it looks really good

    thanks again
      My System SpecsSystem Spec

is this 1ms+ DPC Latency normal?
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