USB hub 2, port 4 (the port I use for nearly all tests & activities) W 1.2 R 29 _________________________________________________________________________________________________________ CONCLUSION _________________________________________________________________________________________________________ Your system appears to be suitable for handling real-time audio and other tasks without dropouts. LatencyMon has been analyzing your system for 0:00:20 (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): 271.633356 Average measured interrupt to process latency (µs): 2.914619 Highest measured interrupt to DPC latency (µs): 269.717747 Average measured interrupt to DPC latency (µs): 1.038975 _________________________________________________________________________________________________________ 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): 55.022455 Driver with highest ISR routine execution time: dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation Highest reported total ISR routine time (%): 0.051587 Driver with highest ISR total time: SCSIPORT.SYS - SCSI Port Driver, Microsoft Corporation Total time spent in ISRs (%) 0.092181 ISR count (execution time <250 µs): 44707 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): 335.751871 Driver with highest DPC routine execution time: ndis.sys - NDIS 6.20 driver, Microsoft Corporation Highest reported total DPC routine time (%): 0.145063 Driver with highest DPC total execution time: Wdf01000.sys - Kernel Mode Driver Framework Runtime, Microsoft Corporation Total time spent in DPCs (%) 0.239131 DPC count (execution time <250 µs): 113826 DPC count (execution time 250-500 µs): 0 DPC count (execution time 500-999 µs): 5 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 12 Hard pagefault count of hardest hit process: 6 Number of processes hit: 1 _________________________________________________________________________________________________________ PER CPU DATA _________________________________________________________________________________________________________ CPU 0 Interrupt cycle time (s): 0.610803 CPU 0 ISR highest execution time (µs): 15.736901 CPU 0 ISR total execution time (s): 0.124918 CPU 0 ISR count: 41846 CPU 0 DPC highest execution time (µs): 335.751871 CPU 0 DPC total execution time (s): 0.330868 CPU 0 DPC count: 104237 _________________________________________________________________________________________________________ CPU 1 Interrupt cycle time (s): 0.099363 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): 0.0 CPU 1 DPC total execution time (s): 0.0 CPU 1 DPC count: 0 _________________________________________________________________________________________________________ CPU 2 Interrupt cycle time (s): 0.198135 CPU 2 ISR highest execution time (µs): 55.022455 CPU 2 ISR total execution time (s): 0.016911 CPU 2 ISR count: 878 CPU 2 DPC highest execution time (µs): 88.923278 CPU 2 DPC total execution time (s): 0.014229 CPU 2 DPC count: 1378 _________________________________________________________________________________________________________ CPU 3 Interrupt cycle time (s): 0.087903 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): 0.0 CPU 3 DPC total execution time (s): 0.0 CPU 3 DPC count: 0 _________________________________________________________________________________________________________ CPU 4 Interrupt cycle time (s): 0.106330 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): 7.170659 CPU 4 DPC total execution time (s): 0.000208 CPU 4 DPC count: 78 _________________________________________________________________________________________________________ CPU 5 Interrupt cycle time (s): 0.081932 CPU 5 ISR highest execution time (µs): 0.0 CPU 5 ISR total execution time (s): 0.0 CPU 5 ISR count: 0 CPU 5 DPC highest execution time (µs): 0.0 CPU 5 DPC total execution time (s): 0.0 CPU 5 DPC count: 0 _________________________________________________________________________________________________________ CPU 6 Interrupt cycle time (s): 0.051318 CPU 6 ISR highest execution time (µs): 8.964820 CPU 6 ISR total execution time (s): 0.000034 CPU 6 ISR count: 6 CPU 6 DPC highest execution time (µs): 8.731662 CPU 6 DPC total execution time (s): 0.000410 CPU 6 DPC count: 178 _________________________________________________________________________________________________________ CPU 7 Interrupt cycle time (s): 0.185645 CPU 7 ISR highest execution time (µs): 7.417665 CPU 7 ISR total execution time (s): 0.007919 CPU 7 ISR count: 1977 CPU 7 DPC highest execution time (µs): 40.646332 CPU 7 DPC total execution time (s): 0.042843 CPU 7 DPC count: 7960 _________________________________________________________________________________________________________