High DPC latency from NDIS.sys, storport.sys causing audio issues

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Choicesb

Member
Joined
Jul 18, 2017
Posts
5
Hey so I'll run you through what I've done thus far for this issue. Out of the box I've had issues with audio latency and audio crackling and popping, with some slow video streaming maybe related. I Literally just opened a dell inspiron gaming 15. Specs here Imgur: The most awesome images on the Internet

I've uninstalled and reinstalled every audio and network drive from the device manager I could, updated BIOS, reset computer, did a clean install of windows, tried disabling audio enhancements, and ran hardware diagnostics through dell BIOS. Still the same issue. I looked at event viewer and I keep getting a DistributedCOM error if that is related. Here's the errors on my event viewer in just the last couple days. Imgur: The most awesome images on the Internet

Imgur: The most awesome images on the Internet, here are my most recent DPC latency tests.


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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 0:58:26 (h:mm:ss) on all processors.




_________________________________________________________________________________________________________
SYSTEM INFORMATION
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Computer name: DESKTOP-9TLBMDN
OS version: Windows 10 , 10.0, build: 15063 (x64)
Hardware: Inspiron 15 7000 Gaming, Dell Inc., 065C71
CPU: GenuineIntel Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz
Logical processors: 8
Processor groups: 1
RAM: 16250 MB total




_________________________________________________________________________________________________________
CPU SPEED
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Reported CPU speed: 2808 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
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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): 8657.314045
Average measured interrupt to process latency (µs): 9.710951


Highest measured interrupt to DPC latency (µs): 8640.174459
Average measured interrupt to DPC latency (µs): 3.151529




_________________________________________________________________________________________________________
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): 303.608618
Driver with highest ISR routine execution time: HDAudBus.sys - High Definition Audio Bus Driver, Microsoft Corporation


Highest reported total ISR routine time (%): 0.051559
Driver with highest ISR total time: HDAudBus.sys - High Definition Audio Bus Driver, Microsoft Corporation


Total time spent in ISRs (%) 0.099580


ISR count (execution time <250 µs): 2983488
ISR count (execution time 250-500 µs): 0
ISR count (execution time 500-999 µs): 13
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
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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): 4082.277422
Driver with highest DPC routine execution time: storport.sys - Microsoft Storage Port Driver, Microsoft Corporation


Highest reported total DPC routine time (%): 0.050380
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 (%) 0.235143


DPC count (execution time <250 µs): 12933252
DPC count (execution time 250-500 µs): 0
DPC count (execution time 500-999 µs): 9235
DPC count (execution time 1000-1999 µs): 71
DPC count (execution time 2000-3999 µs): 6
DPC count (execution time >=4000 µs): 0




_________________________________________________________________________________________________________
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.




Process with highest pagefault count: none


Total number of hard pagefaults 0
Hard pagefault count of hardest hit process: 0
Highest hard pagefault resolution time (µs): 0.0
Total time spent in hard pagefaults (%): 0.0
Number of processes hit: 0




_________________________________________________________________________________________________________
PER CPU DATA
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CPU 0 Interrupt cycle time (s): 258.286669
CPU 0 ISR highest execution time (µs): 289.568732
CPU 0 ISR total execution time (s): 26.251478
CPU 0 ISR count: 2841138
CPU 0 DPC highest execution time (µs): 2658.370014
CPU 0 DPC total execution time (s): 43.164898
CPU 0 DPC count: 11393392
_________________________________________________________________________________________________________
CPU 1 Interrupt cycle time (s): 176.846949
CPU 1 ISR highest execution time (µs): 303.608618
CPU 1 ISR total execution time (s): 1.568839
CPU 1 ISR count: 132030
CPU 1 DPC highest execution time (µs): 3480.796652
CPU 1 DPC total execution time (s): 2.763163
CPU 1 DPC count: 160149
_________________________________________________________________________________________________________
CPU 2 Interrupt cycle time (s): 121.335504
CPU 2 ISR highest execution time (µs): 173.743590
CPU 2 ISR total execution time (s): 0.107933
CPU 2 ISR count: 9767
CPU 2 DPC highest execution time (µs): 800.752849
CPU 2 DPC total execution time (s): 4.385037
CPU 2 DPC count: 325794
_________________________________________________________________________________________________________
CPU 3 Interrupt cycle time (s): 179.416298
CPU 3 ISR highest execution time (µs): 85.181980
CPU 3 ISR total execution time (s): 0.005293
CPU 3 ISR count: 566
CPU 3 DPC highest execution time (µs): 698.595442
CPU 3 DPC total execution time (s): 1.361091
CPU 3 DPC count: 88041
_________________________________________________________________________________________________________
CPU 4 Interrupt cycle time (s): 111.209917
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): 4082.277422
CPU 4 DPC total execution time (s): 5.259498
CPU 4 DPC count: 399698
_________________________________________________________________________________________________________
CPU 5 Interrupt cycle time (s): 186.456057
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): 3776.739316
CPU 5 DPC total execution time (s): 1.903856
CPU 5 DPC count: 122302
_________________________________________________________________________________________________________
CPU 6 Interrupt cycle time (s): 143.796209
CPU 6 ISR highest execution time (µs): 0.0
CPU 6 ISR total execution time (s): 0.0
CPU 6 ISR count: 0
CPU 6 DPC highest execution time (µs): 903.688034
CPU 6 DPC total execution time (s): 5.341283
CPU 6 DPC count: 355458
_________________________________________________________________________________________________________
CPU 7 Interrupt cycle time (s): 181.32990
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): 766.199786
CPU 7 DPC total execution time (s): 1.782215
CPU 7 DPC count: 97731
_________________________________________________________________________________________________________










This issue is making me lose my mind and I would love any help I could possibly get. Thanks so much.
 
Since the latency issue appears to be storage related: Why does your storage show as being in a RAID configuration?
 
That's just how the computer came. Sorry, that was an old screenshot of my specs taken before I switched it over to AHCI in BIOS and then took these readings.
Screenshot (4).jpg
New Specs. Latency tests above were taken with SSD in AHCI config.
 
Nothing too significant pops out. I would recommend checking your drives for errors since there were some IO spikes and a hard fault with your RAM that may suggest a paging issue to disk.



I would also recommend updating your NVIDIA drivers and/or trying the drivers provided by Dell to see if that provides any help with the audio latency; I do see some display related latency that may or may not be a factor in your troubleshooting.



Also check for any storage controller drivers provided by Dell in the above link. There may also be updates to your SSD firmware.


Do the problems only occur when using Google Chrome, or do they occur with other tasks or other browsers?
 
Last edited:
It seems to be getting a lot better, there is still some very minor stuff but its only present in browsers. Spotify has no underruns whatsoever, no latency. Chrome and edge both seem to have latency.
 
Choicesb said:
it seems streaming video might be the issue. Hmmm weird. Updated video drivers.
Click to expand...

Let us know if things improve with the drivers.

If that does not resolve the latency issue, I would also suggest checking the Dell driver support for any SSD firmware update(s) and the Intel Rapid Storage Technology Driver update(s). You'll find them under Serial ATA in the driver list.
 

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