This is the result of LAtencymon (a DPC latency checker):
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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. 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 0:00:05 (h:mm:ss) on all processors.
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SYSTEM INFORMATION
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Computer name: YO-PC
OS version: Windows 7 Service Pack 1, 6.1, build: 7601 (x64)
Hardware: ASRock, G31M-GS.
CPU: GenuineIntel Pentium(R) Dual-Core CPU E6700 @ 3.20GHz
Logical processors: 2
Processor groups: 1
RAM: 4095 MB total
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CPU SPEED
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Reported CPU speed: 3116,0 MHz
Measured CPU speed: 2539,0 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.
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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): 2844,079587
Average measured interrupt to process latency (µs): 2,940680
Highest measured interrupt to DPC latency (µs): 2840,794292
Average measured interrupt to DPC latency (µs): 1,000470
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MEASURED SMI, IPI AND CPU STALLS
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The SMI, IPI and CPU stalls value represents the highest measured interval that a CPU did not respond while having its maskable interrupts disabled.
Highest measured SMI, IPI or CPU stall (µs) 0,328529
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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): 2052,781772
Driver with highest ISR routine execution time: dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation
Highest reported total ISR routine time (%): 0,340789
Driver with highest ISR total time: dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation
Total time spent in ISRs (%) 0,771982
ISR count (execution time <250 µs): 9809
ISR count (execution time 250-500 µs): 0
ISR count (execution time 500-999 µs): 12
ISR count (execution time 1000-1999 µs): 10
ISR count (execution time 2000-3999 µs): 1
ISR count (execution time >=4000 µs): 0
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REPORTED DPCs
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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): 2964,385109
Driver with highest DPC routine execution time: nvlddmkm.sys - NVIDIA Windows Kernel Mode Driver, Version 310.90 , NVIDIA Corporation
Highest reported total DPC routine time (%): 1,024814
Driver with highest DPC total execution time: USBPORT.SYS - Controlador de puertos USB 1.1 y 2.0, Microsoft Corporation
Total time spent in DPCs (%) 1,889109
DPC count (execution time <250 µs): 26882
DPC count (execution time 250-500 µs): 0
DPC count (execution time 500-999 µs): 32
DPC count (execution time 1000-1999 µs): 2
DPC count (execution time 2000-3999 µs): 9
DPC count (execution time >=4000 µs): 0
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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: latmon.exe
Total number of hard pagefaults 1
Hard pagefault count of hardest hit process: 1
Highest hard pagefault resolution time (µs): 7835,822850
Total time spent in hard pagefaults (%): 0,076671
Number of processes hit: 1
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PER CPU DATA
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CPU 0 Interrupt cycle time (s): 0,126315
CPU 0 ISR highest execution time (µs): 2052,781772
CPU 0 ISR total execution time (s): 0,053951
CPU 0 ISR count: 7622
CPU 0 DPC highest execution time (µs): 2964,385109
CPU 0 DPC total execution time (s): 0,107179
CPU 0 DPC count: 20682
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CPU 1 Interrupt cycle time (s): 0,099130
CPU 1 ISR highest execution time (µs): 1828,074454
CPU 1 ISR total execution time (s): 0,024946
CPU 1 ISR count: 2210
CPU 1 DPC highest execution time (µs): 2559,639281
CPU 1 DPC total execution time (s): 0,085888
CPU 1 DPC count: 6243
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Theese numbers are too high!!!
hal.dll have 23,47 ms
directx graphics kernel 23,34 ms
nvidia windows kernel 21,57 ms
usbport.sys 20,13 ms
atapi driver extension 18,30 ms
ndis.sys 14,80 ms
rsplll64.sys 13,66 ms
It's crazy!!!!
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