Hi guys, not sure if this is the correct place to post this.
I'm having major issues with the DPC on my computer.
Before I installed any programs and after on w8.1 i have been having audio drops and cutouts, after installing sound drivers and the Nvidia drivers the problem persists. I checked on LatencyMon and found that the "culprit" is ntoskrnl .exe which I
find weird.
I'm running on a pretty old customized computer:
Motherboard: GigaByte G41M-Combo Ver 2.0
Display card: Nvidia Geforce 630 GT 1GB
RAM: 8GB
My sound card is in my Motherboard.
I'm adding the Latencymon log below.
Thanks in advanced :)
________________________________________________________________________________________________________ CONCLUSION _________________________________________________________________________________________________________ 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. Also one or more ISR 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 0:00:45 (h:mm:ss) on all processors. _________________________________________________________________________________________________________ SYSTEM INFORMATION _________________________________________________________________________________________________________ Computer name: TMD-PC OS version: Windows 8 , 6.2, build: 9200 (x64) Hardware: G41M-Combo, Gigabyte Technology Co., Ltd. CPU: GenuineIntel Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz Logical processors: 4 Processor groups: 1 RAM: 8190 MB total _________________________________________________________________________________________________________ CPU SPEED _________________________________________________________________________________________________________ Reported CPU speed: 2400.0 MHz Measured CPU speed: 2418.0 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 _________________________________________________________________________________________________________ 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): 17028.477366 Average measured interrupt to process latency (µs): 63.439894 Highest measured interrupt to DPC latency (µs): 14383.964644 Average measured interrupt to DPC latency (µs): 16.232874 _________________________________________________________________________________________________________ REPORTED ISRs _________________________________________________________________________________________________________ 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): 14439.251250 Driver with highest ISR routine execution time: dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation Highest reported total ISR routine time (%): 0.193346 Driver with highest ISR total time: i8042prt.sys - i8042 Port Driver, Microsoft Corporation Total time spent in ISRs (%) 0.533586 ISR count (execution time <250 µs): 30428 ISR count (execution time 250-500 µs): 0 ISR count (execution time 500-999 µs): 161 ISR count (execution time 1000-1999 µs): 70 ISR count (execution time 2000-3999 µs): 63 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): 20239.79250 Driver with highest DPC routine execution time: ntoskrnl.exe - NT Kernel & System, Microsoft Corporation Highest reported total DPC routine time (%): 1.616062 Driver with highest DPC total execution time: ntoskrnl.exe - NT Kernel & System, Microsoft Corporation Total time spent in DPCs (%) 2.548219 DPC count (execution time <250 µs): 48083 DPC count (execution time 250-500 µs): 0 DPC count (execution time 500-999 µs): 367 DPC count (execution time 1000-1999 µs): 429 DPC count (execution time 2000-3999 µs): 455 DPC count (execution time >=4000 µs): 0 _________________________________________________________________________________________________________ REPORTED HARD PAGEFAULTS _________________________________________________________________________________________________________ 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: wwahost.exe Total number of hard pagefaults 4278 Hard pagefault count of hardest hit process: 1497 Highest hard pagefault resolution time (µs): 2787033.6750 Total time spent in hard pagefaults (%): 37.751179 Number of processes hit: 22 _________________________________________________________________________________________________________ PER CPU DATA _________________________________________________________________________________________________________ CPU 0 Interrupt cycle time (s): 1.572755 CPU 0 ISR highest execution time (µs): 9757.01250 CPU 0 ISR total execution time (s): 0.200408 CPU 0 ISR count: 7698 CPU 0 DPC highest execution time (µs): 14302.2150 CPU 0 DPC total execution time (s): 1.165118 CPU 0 DPC count: 28822 _________________________________________________________________________________________________________ CPU 1 Interrupt cycle time (s): 1.483149 CPU 1 ISR highest execution time (µs): 11570.310 CPU 1 ISR total execution time (s): 0.258206 CPU 1 ISR count: 7682 CPU 1 DPC highest execution time (µs): 20239.79250 CPU 1 DPC total execution time (s): 1.090318 CPU 1 DPC count: 6806 _________________________________________________________________________________________________________ CPU 2 Interrupt cycle time (s): 1.641848 CPU 2 ISR highest execution time (µs): 11079.963750 CPU 2 ISR total execution time (s): 0.279112 CPU 2 ISR count: 7724 CPU 2 DPC highest execution time (µs): 14374.218750 CPU 2 DPC total execution time (s): 1.291539 CPU 2 DPC count: 6905 _________________________________________________________________________________________________________ CPU 3 Interrupt cycle time (s): 1.46490 CPU 3 ISR highest execution time (µs): 14439.251250 CPU 3 ISR total execution time (s): 0.227062 CPU 3 ISR count: 7656 CPU 3 DPC highest execution time (µs): 17224.286250 CPU 3 DPC total execution time (s): 1.060511 CPU 3 DPC count: 7038 _________________________________________________________________________________________________________