Hello,

My HP Envy laptop has been stuttering since the Anniversary Upgrade a few weeks ago. I ran LatencyMon, but don't know what to do with the results, which clearly show a problem. Can someone provide some guidance? Here's the LatencyMon report:

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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 or more DPC routines that belong to a driver running in your system appear to be executing for too long. At least one detected problem appears to be network related. In case you are using a WLAN adapter, try disabling it to get better results. 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 0:04:29 (h:mm:ss) on all processors.


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SYSTEM INFORMATION
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Computer name: HP-ENVY
OS version: Windows 8 , 6.2, build: 9200 (x64)
Hardware: HP ENVY dv7 Notebook PC, Hewlett-Packard, 1833
CPU: AuthenticAMD AMD A8-4500M APU with Radeon(tm) HD Graphics
Logical processors: 4
Processor groups: 1
RAM: 5602 MB total


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CPU SPEED
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Reported CPU speed: 1896 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.


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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 (s): 18379.440771
Average measured interrupt to process latency (s): 8.617107

Highest measured interrupt to DPC latency (s): 18375.121152
Average measured interrupt to DPC latency (s): 2.470257


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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 (s): 116.318565
Driver with highest ISR routine execution time: Wdf01000.sys - Kernel Mode Driver Framework Runtime, Microsoft Corporation

Highest reported total ISR routine time (%): 0.021981
Driver with highest ISR total time: storport.sys - Microsoft Storage Port Driver, Microsoft Corporation

Total time spent in ISRs (%) 0.031704

ISR count (execution time <250 s): 36447
ISR count (execution time 250-500 s): 0
ISR count (execution time 500-999 s): 0
ISR count (execution time 1000-1999 s): 0
ISR count (execution time 2000-3999 s): 0
ISR count (execution time >=4000 s): 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 (s): 273375.601793
Driver with highest DPC routine execution time: tcpip.sys - TCP/IP Driver, Microsoft Corporation

Highest reported total DPC routine time (%): 0.105942
Driver with highest DPC total execution time: rspLLL64.sys - Resplendence Latency Monitoring and Auxiliary Kernel Library, Resplendence Software Projects Sp.

Total time spent in DPCs (%) 0.383663

DPC count (execution time <250 s): 794789
DPC count (execution time 250-500 s): 0
DPC count (execution time 500-999 s): 43
DPC count (execution time 1000-1999 s): 0
DPC count (execution time 2000-3999 s): 0
DPC count (execution time >=4000 s): 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: rundll32.exe

Total number of hard pagefaults 14153
Hard pagefault count of hardest hit process: 8010
Highest hard pagefault resolution time (s): 13196816.924578
Total time spent in hard pagefaults (%): 17.995388
Number of processes hit: 9


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PER CPU DATA
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CPU 0 Interrupt cycle time (s): 12.784043
CPU 0 ISR highest execution time (s): 116.318565
CPU 0 ISR total execution time (s): 0.322631
CPU 0 ISR count: 31911
CPU 0 DPC highest execution time (s): 250325.131857
CPU 0 DPC total execution time (s): 3.281989
CPU 0 DPC count: 765235
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CPU 1 Interrupt cycle time (s): 2.544518
CPU 1 ISR highest execution time (s): 20.377637
CPU 1 ISR total execution time (s): 0.003724
CPU 1 ISR count: 1122
CPU 1 DPC highest execution time (s): 262813.633439
CPU 1 DPC total execution time (s): 0.403143
CPU 1 DPC count: 13615
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CPU 2 Interrupt cycle time (s): 2.537948
CPU 2 ISR highest execution time (s): 24.854958
CPU 2 ISR total execution time (s): 0.005157
CPU 2 ISR count: 1146
CPU 2 DPC highest execution time (s): 273375.601793
CPU 2 DPC total execution time (s): 0.373481
CPU 2 DPC count: 9157
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CPU 3 Interrupt cycle time (s): 1.834778
CPU 3 ISR highest execution time (s): 31.013186
CPU 3 ISR total execution time (s): 0.009720
CPU 3 ISR count: 2268
CPU 3 DPC highest execution time (s): 146.930380
CPU 3 DPC total execution time (s): 0.070794
CPU 3 DPC count: 6828
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