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toxify

High dpc latency windows 8.1

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_________________________________________________________________________________________________________

CONCLUSION

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Your system appears to be having trouble handling real-time audio and other tasks. You are likely to experience buffer underruns appearing as drop outs, clicks or pops. One or more DPC routines that belong to a driver running in your system appear to be executing for too long. One problem may be related to power management, disable CPU throttling settings in Control Panel and BIOS setup. Check for BIOS updates. 

LatencyMon has been analyzing your system for  0:02:50  (h:mm:ss) on processors 0,1,2 and 3.

 

 

_________________________________________________________________________________________________________

SYSTEM INFORMATION

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Computer name:                                        TOXIFY

OS version:                                           Windows 8 , 6.2, build: 9200 (x64)

Hardware:                                             All Series, ASUS, ASUSTeK COMPUTER INC., MAXIMUS VII HERO

CPU:                                                  GenuineIntel Intel® Core i7-4790K CPU @ 4.00GHz

Logical processors:                                   8

Processor groups:                                     1

RAM:                                                  8133 MB total

 

 

_________________________________________________________________________________________________________

CPU SPEED

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Reported CPU speed:                                   4007.0 MHz

Measured CPU speed:                                   4594.0 MHz (approx.)

 

Note: reported execution times may be calculated based on a fixed reported CPU speed. Disable variable speed settings like Intel Speed Step and AMD Cool N Quiet in the BIOS setup for more accurate results.

 

 

_________________________________________________________________________________________________________

MEASURED INTERRUPT TO USER PROCESS LATENCIES

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The interrupt to process latency reflects the measured interval that a usermode process needed to respond to a hardware request from the moment the interrupt service routine started execution. This includes the scheduling and execution of a DPC routine, the signaling of an event and the waking up of a usermode thread from an idle wait state in response to that event.

 

Highest measured interrupt to process latency (µs):   596.165155

Average measured interrupt to process latency (µs):   10.218542

 

Highest measured interrupt to DPC latency (µs):       589.460392

Average measured interrupt to DPC latency (µs):       6.964764

 

 

_________________________________________________________________________________________________________

 REPORTED ISRs

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Interrupt service routines are routines installed by the OS and device drivers that execute in response to a hardware interrupt signal.

 

Highest ISR routine execution time (µs):              465.782630

Driver with highest ISR routine execution time:       dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation

 

Highest reported total ISR routine time (%):          0.079257

Driver with highest ISR total time:                   dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation

 

Total time spent in ISRs (%)                          0.155481

 

ISR count (execution time <250 µs):                   216807

ISR count (execution time 250-500 µs):                0

ISR count (execution time 500-999 µs):                1

ISR count (execution time 1000-1999 µs):              0

ISR count (execution time 2000-3999 µs):              0

ISR count (execution time >=4000 µs):                 0

 

 

_________________________________________________________________________________________________________

REPORTED DPCs

_________________________________________________________________________________________________________

DPC routines are part of the interrupt servicing dispatch mechanism and disable the possibility for a process to utilize the CPU while it is interrupted until the DPC has finished execution.

 

Highest DPC routine execution time (µs):              2329.100075

Driver with highest DPC routine execution time:       nvlddmkm.sys - NVIDIA Windows Kernel Mode Driver, Version 352.94 , NVIDIA Corporation

 

Highest reported total DPC routine time (%):          0.236642

Driver with highest DPC total execution time:         cmudaxp.sys - C-Media Audio WDM Driver, C-Media Inc

 

Total time spent in DPCs (%)                          0.465970

 

DPC count (execution time <250 µs):                   977586

DPC count (execution time 250-500 µs):                0

DPC count (execution time 500-999 µs):                71

DPC count (execution time 1000-1999 µs):              0

DPC count (execution time 2000-3999 µs):              1

DPC count (execution time >=4000 µs):                 0

 

 

_________________________________________________________________________________________________________

 REPORTED HARD PAGEFAULTS

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Hard pagefaults are events that get triggered by making use of virtual memory that is not resident in RAM but backed by a memory mapped file on disk. The process of resolving the hard pagefault requires reading in the memory from disk while the process is interrupted and blocked from execution.

 

NOTE: some processes were hit by hard pagefaults. If these were programs producing audio, they are likely to interrupt the audio stream resulting in dropouts, clicks and pops. Check the Processes tab to see which programs were hit.

 

Process with highest pagefault count:                 chrome.exe

 

Total number of hard pagefaults                       32137

Hard pagefault count of hardest hit process:          6461

Highest hard pagefault resolution time (µs):          144299865.422511

Total time spent in hard pagefaults (%):              13.515187

Number of processes hit:                              67

 

 

_________________________________________________________________________________________________________

 PER CPU DATA

_________________________________________________________________________________________________________

CPU 0 Interrupt cycle time (s):                       11.126682

CPU 0 ISR highest execution time (µs):                465.782630

CPU 0 ISR total execution time (s):                   2.124452

CPU 0 ISR count:                                      216808

CPU 0 DPC highest execution time (µs):                2329.100075

CPU 0 DPC total execution time (s):                   6.278457

CPU 0 DPC count:                                      916019

_________________________________________________________________________________________________________

CPU 1 Interrupt cycle time (s):                       0.518495

CPU 1 ISR highest execution time (µs):                0.0

CPU 1 ISR total execution time (s):                   0.0

CPU 1 ISR count:                                      0

CPU 1 DPC highest execution time (µs):                73.578737

CPU 1 DPC total execution time (s):                   0.023104

CPU 1 DPC count:                                      20143

_________________________________________________________________________________________________________

CPU 2 Interrupt cycle time (s):                       0.525271

CPU 2 ISR highest execution time (µs):                0.0

CPU 2 ISR total execution time (s):                   0.0

CPU 2 ISR count:                                      0

CPU 2 DPC highest execution time (µs):                73.935114

CPU 2 DPC total execution time (s):                   0.045813

CPU 2 DPC count:                                      24886

_________________________________________________________________________________________________________

CPU 3 Interrupt cycle time (s):                       0.471954

CPU 3 ISR highest execution time (µs):                0.0

CPU 3 ISR total execution time (s):                   0.0

CPU 3 ISR count:                                      0

CPU 3 DPC highest execution time (µs):                106.430746

CPU 3 DPC total execution time (s):                   0.019528

CPU 3 DPC count:                                      16610

_________________________________________________________________________________________________________

i've literally tried everything to fix this pls help

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I've no idea, but I can attest to seeing audio/video skips rather frequently. Even something simple like audio playback in Winamp is susceptible. No idea what's to blame.

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I've read countless page on google trying different things,can't solve it yet

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Your system info shows Windows 8 rather than 8.1?

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Your system info shows Windows 8 rather than 8.1?

yep pretty strange cause when i pull up system properties it says windows 8.1 pro

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DPC Latency Checker doesn't really support Windows 8, so I guess it's a bug. It is that software, right?

Edited by shae

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I'll try to take a look at this in-depth later, but it appears your audio driver is a very likely culprit, CMUDAXP.SYS:

 

cmudaxp.png

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i've tried it with the soundcard disabled and it still happens,plus i've also tried all the drivers available for this card none help

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If that's the case (those listed routines call HDAUDIO functions, which would call the audio driver), then you have to start looking at both your video card drivers and your Intel ICH/RAID drivers.  Both also have a decent number of interrupts as you can see in the table above.  I noticed that the Intel Chipset is listed on IRQL16, as is your video card.  Not good.

 

irqsharing.png

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If that's the case (those listed routines call HDAUDIO functions, which would call the audio driver), then you have to start looking at both your video card drivers and your Intel ICH/RAID drivers.  Both also have a decent number of interrupts as you can see in the table above.

i've updated all of my drivers since that trace i can do a new one if you would like

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