USB hub 2, port 8 W 0.05 R 32 _________________________________________________________________________________________________________ CONCLUSION _________________________________________________________________________________________________________ Your system appears to be suitable for handling real-time audio and other tasks without dropouts. LatencyMon has been analyzing your system for 0:00:27 (h:mm:ss) on all processors. _________________________________________________________________________________________________________ SYSTEM INFORMATION _________________________________________________________________________________________________________ Computer name: NIV OS version: Windows 7 Service Pack 1, 6.1, build: 7601 (x64) Hardware: ASUSTeK Computer INC., P6T CPU: GenuineIntel Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz Logical processors: 8 Processor groups: 1 RAM: 12278 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): 395.381697 Average measured interrupt to process latency (µs): 3.244052 Highest measured interrupt to DPC latency (µs): 393.849209 Average measured interrupt to DPC latency (µs): 1.213028 _________________________________________________________________________________________________________ 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): 56.202844 Driver with highest ISR routine execution time: dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation Highest reported total ISR routine time (%): 0.054585 Driver with highest ISR total time: SCSIPORT.SYS - SCSI Port Driver, Microsoft Corporation Total time spent in ISRs (%) 0.084360 ISR count (execution time <250 µs): 59964 ISR count (execution time 250-500 µs): 0 ISR count (execution time 500-999 µs): 0 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): 388.061003 Driver with highest DPC routine execution time: ndis.sys - NDIS 6.20 driver, Microsoft Corporation Highest reported total DPC routine time (%): 0.152668 Driver with highest DPC total execution time: Wdf01000.sys - Kernel Mode Driver Framework Runtime, Microsoft Corporation Total time spent in DPCs (%) 0.220056 DPC count (execution time <250 µs): 149023 DPC count (execution time 250-500 µs): 0 DPC count (execution time 500-999 µs): 27 DPC count (execution time 1000-1999 µs): 0 DPC count (execution time 2000-3999 µs): 0 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 8 Hard pagefault count of hardest hit process: 4 Number of processes hit: 1 _________________________________________________________________________________________________________ PER CPU DATA _________________________________________________________________________________________________________ CPU 0 Interrupt cycle time (s): 0.840020 CPU 0 ISR highest execution time (µs): 17.176647 CPU 0 ISR total execution time (s): 0.179243 CPU 0 ISR count: 59539 CPU 0 DPC highest execution time (µs): 388.061003 CPU 0 DPC total execution time (s): 0.476337 CPU 0 DPC count: 148081 _________________________________________________________________________________________________________ CPU 1 Interrupt cycle time (s): 0.130390 CPU 1 ISR highest execution time (µs): 8.599177 CPU 1 ISR total execution time (s): 0.000281 CPU 1 ISR count: 43 CPU 1 DPC highest execution time (µs): 9.351048 CPU 1 DPC total execution time (s): 0.000067 CPU 1 DPC count: 10 _________________________________________________________________________________________________________ CPU 2 Interrupt cycle time (s): 0.244623 CPU 2 ISR highest execution time (µs): 56.202844 CPU 2 ISR total execution time (s): 0.005230 CPU 2 ISR count: 267 CPU 2 DPC highest execution time (µs): 70.040419 CPU 2 DPC total execution time (s): 0.004451 CPU 2 DPC count: 396 _________________________________________________________________________________________________________ CPU 3 Interrupt cycle time (s): 0.127437 CPU 3 ISR highest execution time (µs): 12.732410 CPU 3 ISR total execution time (s): 0.000013 CPU 3 ISR count: 1 CPU 3 DPC highest execution time (µs): 7.322231 CPU 3 DPC total execution time (s): 0.000062 CPU 3 DPC count: 34 _________________________________________________________________________________________________________ CPU 4 Interrupt cycle time (s): 0.104382 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): 6.651572 CPU 4 DPC total execution time (s): 0.000170 CPU 4 DPC count: 82 _________________________________________________________________________________________________________ CPU 5 Interrupt cycle time (s): 0.109514 CPU 5 ISR highest execution time (µs): 4.985030 CPU 5 ISR total execution time (s): 0.000263 CPU 5 ISR count: 102 CPU 5 DPC highest execution time (µs): 29.501497 CPU 5 DPC total execution time (s): 0.001168 CPU 5 DPC count: 207 _________________________________________________________________________________________________________ CPU 6 Interrupt cycle time (s): 0.133157 CPU 6 ISR highest execution time (µs): 8.063623 CPU 6 ISR total execution time (s): 0.000055 CPU 6 ISR count: 12 CPU 6 DPC highest execution time (µs): 7.943862 CPU 6 DPC total execution time (s): 0.000547 CPU 6 DPC count: 240 _________________________________________________________________________________________________________ CPU 7 Interrupt cycle time (s): 0.134460 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): 0.0 CPU 7 DPC total execution time (s): 0.0 CPU 7 DPC count: 0 _________________________________________________________________________________________________________