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 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 0:43:33 (h:mm:ss) on all processors.
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SYSTEM INFORMATION
_________________________________________________________________________________________________________
Computer name: DESKTOP-AF30Q7L
OS version: Windows 8 , 6.2, build: 9200 (x64)
Hardware: XPS 8700, Dell Inc., 0KWVT8
CPU: GenuineIntel Intel(R) Core(TM) i7-4790 CPU @ 3.60GHz
Logical processors: 8
Processor groups: 1
RAM: 8143 MB total
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CPU SPEED
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Reported CPU speed: 3592 MHz
Measured CPU speed: 1 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.
WARNING: the CPU speed that was measured is only a fraction of the CPU speed reported. Your CPUs may be throttled back due to variable speed settings and thermal issues. It is suggested that you run a utility which reports your actual CPU frequency and temperature.
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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): 2212.118154
Average measured interrupt to process latency (µs): 11.948560
Highest measured interrupt to DPC latency (µs): 1478.831920
Average measured interrupt to DPC latency (µs): 2.402662
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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): 252.706570
Driver with highest ISR routine execution time: dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation
Highest reported total ISR routine time (%): 0.039039
Driver with highest ISR total time: dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation
Total time spent in ISRs (%) 0.048384
ISR count (execution time <250 µs): 762355
ISR count (execution time 250-500 µs): 0
ISR count (execution time 500-999 µs): 2
ISR count (execution time 1000-1999 µs): 0
ISR count (execution time 2000-3999 µs): 0
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): 927.445991
Driver with highest DPC routine execution time: ndis.sys - Network Driver Interface Specification (NDIS), Microsoft Corporation
Highest reported total DPC routine time (%): 0.027056
Driver with highest DPC total execution time: Wdf01000.sys - Kernel Mode Driver Framework Runtime, Microsoft Corporation
Total time spent in DPCs (%) 0.107318
DPC count (execution time <250 µs): 2980097
DPC count (execution time 250-500 µs): 0
DPC count (execution time 500-999 µs): 275
DPC count (execution time 1000-1999 µs): 0
DPC count (execution time 2000-3999 µs): 0
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: svchost.exe
Total number of hard pagefaults 3366
Hard pagefault count of hardest hit process: 890
Highest hard pagefault resolution time (µs): 3725144.217428
Total time spent in hard pagefaults (%): 0.644933
Number of processes hit: 26
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PER CPU DATA
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CPU 0 Interrupt cycle time (s): 47.005211
CPU 0 ISR highest execution time (µs): 252.706570
CPU 0 ISR total execution time (s): 9.82080
CPU 0 ISR count: 625472
CPU 0 DPC highest execution time (µs): 624.718263
CPU 0 DPC total execution time (s): 18.291808
CPU 0 DPC count: 2546171
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CPU 1 Interrupt cycle time (s): 15.034828
CPU 1 ISR highest execution time (µs): 236.285078
CPU 1 ISR total execution time (s): 0.117418
CPU 1 ISR count: 50775
CPU 1 DPC highest execution time (µs): 605.194878
CPU 1 DPC total execution time (s): 0.669128
CPU 1 DPC count: 67390
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CPU 2 Interrupt cycle time (s): 10.303827
CPU 2 ISR highest execution time (µs): 80.011971
CPU 2 ISR total execution time (s): 0.024770
CPU 2 ISR count: 11593
CPU 2 DPC highest execution time (µs): 621.881960
CPU 2 DPC total execution time (s): 0.692990
CPU 2 DPC count: 63893
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CPU 3 Interrupt cycle time (s): 14.679202
CPU 3 ISR highest execution time (µs): 107.893931
CPU 3 ISR total execution time (s): 0.050555
CPU 3 ISR count: 20285
CPU 3 DPC highest execution time (µs): 318.532851
CPU 3 DPC total execution time (s): 0.398282
CPU 3 DPC count: 49531
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CPU 4 Interrupt cycle time (s): 10.575754
CPU 4 ISR highest execution time (µs): 44.929844
CPU 4 ISR total execution time (s): 0.030433
CPU 4 ISR count: 16508
CPU 4 DPC highest execution time (µs): 805.976893
CPU 4 DPC total execution time (s): 0.643132
CPU 4 DPC count: 72084
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CPU 5 Interrupt cycle time (s): 15.874311
CPU 5 ISR highest execution time (µs): 46.503341
CPU 5 ISR total execution time (s): 0.028402
CPU 5 ISR count: 13592
CPU 5 DPC highest execution time (µs): 511.068207
CPU 5 DPC total execution time (s): 0.490312
CPU 5 DPC count: 57806
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CPU 6 Interrupt cycle time (s): 10.512832
CPU 6 ISR highest execution time (µs): 88.762249
CPU 6 ISR total execution time (s): 0.023521
CPU 6 ISR count: 14266
CPU 6 DPC highest execution time (µs): 927.445991
CPU 6 DPC total execution time (s): 0.732164
CPU 6 DPC count: 72388
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CPU 7 Interrupt cycle time (s): 15.072497
CPU 7 ISR highest execution time (µs): 46.904232
CPU 7 ISR total execution time (s): 0.020409
CPU 7 ISR count: 9866
CPU 7 DPC highest execution time (µs): 138.945991
CPU 7 DPC total execution time (s): 0.520811
CPU 7 DPC count: 51109
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_________________________________________________________________________________________________________
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 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 0:47:33 (h:mm:ss) on all processors.
_________________________________________________________________________________________________________
SYSTEM INFORMATION
_________________________________________________________________________________________________________
Computer name: DESKTOP-AF30Q7L
OS version: Windows 8 , 6.2, build: 9200 (x64)
Hardware: XPS 8700, Dell Inc., 0KWVT8
CPU: GenuineIntel Intel(R) Core(TM) i7-4790 CPU @ 3.60GHz
Logical processors: 8
Processor groups: 1
RAM: 8143 MB total
_________________________________________________________________________________________________________
CPU SPEED
_________________________________________________________________________________________________________
Reported CPU speed: 3592 MHz
Measured CPU speed: 1 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.
WARNING: the CPU speed that was measured is only a fraction of the CPU speed reported. Your CPUs may be throttled back due to variable speed settings and thermal issues. It is suggested that you run a utility which reports your actual CPU frequency and temperature.
_________________________________________________________________________________________________________
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): 2212.118154
Average measured interrupt to process latency (µs): 11.185173
Highest measured interrupt to DPC latency (µs): 1478.831920
Average measured interrupt to DPC latency (µs): 2.250875
_________________________________________________________________________________________________________
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): 252.706570
Driver with highest ISR routine execution time: dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation
Highest reported total ISR routine time (%): 0.038103
Driver with highest ISR total time: dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation
Total time spent in ISRs (%) 0.047127
ISR count (execution time <250 µs): 862704
ISR count (execution time 250-500 µs): 0
ISR count (execution time 500-999 µs): 2
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): 927.445991
Driver with highest DPC routine execution time: ndis.sys - Network Driver Interface Specification (NDIS), Microsoft Corporation
Highest reported total DPC routine time (%): 0.025545
Driver with highest DPC total execution time: Wdf01000.sys - Kernel Mode Driver Framework Runtime, Microsoft Corporation
Total time spent in DPCs (%) 0.102403
DPC count (execution time <250 µs): 3248783
DPC count (execution time 250-500 µs): 0
DPC count (execution time 500-999 µs): 279
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: svchost.exe
Total number of hard pagefaults 3407
Hard pagefault count of hardest hit process: 890
Highest hard pagefault resolution time (µs): 3725144.217428
Total time spent in hard pagefaults (%): 0.592873
Number of processes hit: 29
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PER CPU DATA
_________________________________________________________________________________________________________
CPU 0 Interrupt cycle time (s): 51.011624
CPU 0 ISR highest execution time (µs): 252.706570
CPU 0 ISR total execution time (s): 10.454135
CPU 0 ISR count: 706934
CPU 0 DPC highest execution time (µs): 624.718263
CPU 0 DPC total execution time (s): 19.102845
CPU 0 DPC count: 2789471
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CPU 1 Interrupt cycle time (s): 17.465658
CPU 1 ISR highest execution time (µs): 236.285078
CPU 1 ISR total execution time (s): 0.122351
CPU 1 ISR count: 59705
CPU 1 DPC highest execution time (µs): 605.194878
CPU 1 DPC total execution time (s): 0.679929
CPU 1 DPC count: 69767
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CPU 2 Interrupt cycle time (s): 11.327276
CPU 2 ISR highest execution time (µs): 80.011971
CPU 2 ISR total execution time (s): 0.025539
CPU 2 ISR count: 13680
CPU 2 DPC highest execution time (µs): 621.881960
CPU 2 DPC total execution time (s): 0.711580
CPU 2 DPC count: 67568
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CPU 3 Interrupt cycle time (s): 16.120169
CPU 3 ISR highest execution time (µs): 107.893931
CPU 3 ISR total execution time (s): 0.051501
CPU 3 ISR count: 22155
CPU 3 DPC highest execution time (µs): 318.532851
CPU 3 DPC total execution time (s): 0.410121
CPU 3 DPC count: 52064
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CPU 4 Interrupt cycle time (s): 11.716844
CPU 4 ISR highest execution time (µs): 44.929844
CPU 4 ISR total execution time (s): 0.030935
CPU 4 ISR count: 18127
CPU 4 DPC highest execution time (µs): 805.976893
CPU 4 DPC total execution time (s): 0.680448
CPU 4 DPC count: 78909
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CPU 5 Interrupt cycle time (s): 17.431684
CPU 5 ISR highest execution time (µs): 46.503341
CPU 5 ISR total execution time (s): 0.029075
CPU 5 ISR count: 15487
CPU 5 DPC highest execution time (µs): 511.068207
CPU 5 DPC total execution time (s): 0.505609
CPU 5 DPC count: 60966
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CPU 6 Interrupt cycle time (s): 11.479229
CPU 6 ISR highest execution time (µs): 88.762249
CPU 6 ISR total execution time (s): 0.023861
CPU 6 ISR count: 15438
CPU 6 DPC highest execution time (µs): 927.445991
CPU 6 DPC total execution time (s): 0.751779
CPU 6 DPC count: 76359
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CPU 7 Interrupt cycle time (s): 16.460799
CPU 7 ISR highest execution time (µs): 46.904232
CPU 7 ISR total execution time (s): 0.020959
CPU 7 ISR count: 11180
CPU 7 DPC highest execution time (µs): 138.945991
CPU 7 DPC total execution time (s): 0.534752
CPU 7 DPC count: 53958
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