USB hub 2, port 4 (Repeated after 6th port) W 1.47 R 26 _________________________________________________________________________________________________________ CONCLUSION _________________________________________________________________________________________________________ Your system appears to be suitable for handling real-time audio and other tasks without dropouts. LatencyMon has been analyzing your system for 0:00:21 (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): 298.451881 Average measured interrupt to process latency (µs): 2.516244 Highest measured interrupt to DPC latency (µs): 275.847695 Average measured interrupt to DPC latency (µs): 1.050820 _________________________________________________________________________________________________________ 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): 55.481287 Driver with highest ISR routine execution time: dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation Highest reported total ISR routine time (%): 0.048087 Driver with highest ISR total time: SCSIPORT.SYS - SCSI Port Driver, Microsoft Corporation Total time spent in ISRs (%) 0.087718 ISR count (execution time <250 µs): 45199 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): 392.676272 Driver with highest DPC routine execution time: ndis.sys - NDIS 6.20 driver, Microsoft Corporation Highest reported total DPC routine time (%): 0.132907 Driver with highest DPC total execution time: Wdf01000.sys - Kernel Mode Driver Framework Runtime, Microsoft Corporation Total time spent in DPCs (%) 0.227859 DPC count (execution time <250 µs): 117121 DPC count (execution time 250-500 µs): 0 DPC count (execution time 500-999 µs): 22 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): 0.599825 CPU 0 ISR highest execution time (µs): 14.817365 CPU 0 ISR total execution time (s): 0.122685 CPU 0 ISR count: 41230 CPU 0 DPC highest execution time (µs): 392.676272 CPU 0 DPC total execution time (s): 0.304514 CPU 0 DPC count: 102547 _________________________________________________________________________________________________________ CPU 1 Interrupt cycle time (s): 0.096424 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): 0.196514 CPU 2 ISR highest execution time (µs): 55.481287 CPU 2 ISR total execution time (s): 0.014251 CPU 2 ISR count: 739 CPU 2 DPC highest execution time (µs): 90.102171 CPU 2 DPC total execution time (s): 0.011784 CPU 2 DPC count: 1156 _________________________________________________________________________________________________________ CPU 3 Interrupt cycle time (s): 0.087677 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): 0.110001 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): 6.888473 CPU 4 DPC total execution time (s): 0.000122 CPU 4 DPC count: 52 _________________________________________________________________________________________________________ CPU 5 Interrupt cycle time (s): 0.086512 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): 0.086362 CPU 6 ISR highest execution time (µs): 8.759731 CPU 6 ISR total execution time (s): 0.000078 CPU 6 ISR count: 18 CPU 6 DPC highest execution time (µs): 12.217814 CPU 6 DPC total execution time (s): 0.000831 CPU 6 DPC count: 281 _________________________________________________________________________________________________________ CPU 7 Interrupt cycle time (s): 0.236855 CPU 7 ISR highest execution time (µs): 7.763473 CPU 7 ISR total execution time (s): 0.012632 CPU 7 ISR count: 3212 CPU 7 DPC highest execution time (µs): 40.419162 CPU 7 DPC total execution time (s): 0.071476 CPU 7 DPC count: 13107 _________________________________________________________________________________________________________