_________________________________________________________________________________________________________ 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 0:40:33 (h:mm:ss) on all processors. _________________________________________________________________________________________________________ SYSTEM INFORMATION _________________________________________________________________________________________________________ Computer name: DESKTOP-SASCHA OS version: Windows 7 Service Pack 1, 6.1, build: 7601 (x64) Hardware: ASUSTeK Computer INC., P6T SE CPU: GenuineIntel Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz Logical processors: 8 Processor groups: 1 RAM: 10231 MB total _________________________________________________________________________________________________________ CPU SPEED _________________________________________________________________________________________________________ Reported CPU speed: 2672 MHz 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): 23720,693944 Average measured interrupt to process latency (µs): 2,391107 Highest measured interrupt to DPC latency (µs): 4756,858481 Average measured interrupt to DPC latency (µs): 0,713966 _________________________________________________________________________________________________________ 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): 18877,391841 Driver with highest ISR routine execution time: Wdf01000.sys - Kernel Mode Driver Framework-runtime, Microsoft Corporation Highest reported total ISR routine time (%): 0,217121 Driver with highest ISR total time: Wdf01000.sys - Kernel Mode Driver Framework-runtime, Microsoft Corporation Total time spent in ISRs (%) 0,398620 ISR count (execution time <250 µs): 6848778 ISR count (execution time 250-500 µs): 0 ISR count (execution time 500-999 µs): 52715 ISR count (execution time 1000-1999 µs): 8997 ISR count (execution time 2000-3999 µs): 3576 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): 15000,899326 Driver with highest DPC routine execution time: iaStorA.sys - Intel Rapid Storage Technology driver - x64, Intel Corporation Highest reported total DPC routine time (%): 0,234892 Driver with highest DPC total execution time: USBPORT.SYS - Poortstuurprogramma voor USB 1.1 en 2.0, Microsoft Corporation Total time spent in DPCs (%) 0,597614 DPC count (execution time <250 µs): 21689566 DPC count (execution time 250-500 µs): 0 DPC count (execution time 500-999 µs): 31291 DPC count (execution time 1000-1999 µs): 10341 DPC count (execution time 2000-3999 µs): 2758 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: msmpeng.exe Total number of hard pagefaults 9484 Hard pagefault count of hardest hit process: 3326 Highest hard pagefault resolution time (µs): 425259,882111 Total time spent in hard pagefaults (%): 0,097396 Number of processes hit: 40 _________________________________________________________________________________________________________ PER CPU DATA _________________________________________________________________________________________________________ CPU 0 Interrupt cycle time (s): 49,129936 CPU 0 ISR highest execution time (µs): 1682,924027 CPU 0 ISR total execution time (s): 1,58910 CPU 0 ISR count: 2432365 CPU 0 DPC highest execution time (µs): 6233,433383 CPU 0 DPC total execution time (s): 13,496764 CPU 0 DPC count: 13410685 _________________________________________________________________________________________________________ CPU 1 Interrupt cycle time (s): 30,983443 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): 5310,944611 CPU 1 DPC total execution time (s): 2,422003 CPU 1 DPC count: 309716 _________________________________________________________________________________________________________ CPU 2 Interrupt cycle time (s): 46,265176 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): 11670,036677 CPU 2 DPC total execution time (s): 13,565967 CPU 2 DPC count: 1821387 _________________________________________________________________________________________________________ CPU 3 Interrupt cycle time (s): 79,541595 CPU 3 ISR highest execution time (µs): 18877,391841 CPU 3 ISR total execution time (s): 46,329851 CPU 3 ISR count: 553007 CPU 3 DPC highest execution time (µs): 15000,899326 CPU 3 DPC total execution time (s): 18,397266 CPU 3 DPC count: 1599305 _________________________________________________________________________________________________________ CPU 4 Interrupt cycle time (s): 25,031370 CPU 4 ISR highest execution time (µs): 0,0 CPU 4 ISR total execution time (s): 0,0 CPU 4 ISR count: 0 CPU 4 DPC highest execution time (µs): 5601,589072 CPU 4 DPC total execution time (s): 5,900164 CPU 4 DPC count: 547532 _________________________________________________________________________________________________________ CPU 5 Interrupt cycle time (s): 95,100942 CPU 5 ISR highest execution time (µs): 18130,607784 CPU 5 ISR total execution time (s): 23,466668 CPU 5 ISR count: 3646825 CPU 5 DPC highest execution time (µs): 8469,446482 CPU 5 DPC total execution time (s): 50,105973 CPU 5 DPC count: 3138705 _________________________________________________________________________________________________________ CPU 6 Interrupt cycle time (s): 42,256506 CPU 6 ISR highest execution time (µs): 10684,858159 CPU 6 ISR total execution time (s): 6,224404 CPU 6 ISR count: 282121 CPU 6 DPC highest execution time (µs): 6673,191617 CPU 6 DPC total execution time (s): 9,683618 CPU 6 DPC count: 509621 _________________________________________________________________________________________________________ CPU 7 Interrupt cycle time (s): 27,013253 CPU 7 ISR highest execution time (µs): 0,0 CPU 7 ISR total execution time (s): 0,0 CPU 7 ISR count: 0 CPU 7 DPC highest execution time (µs): 4978,060629 CPU 7 DPC total execution time (s): 2,781785 CPU 7 DPC count: 397196 _________________________________________________________________________________________________________