High DPC Latency or pagefaults - Fresh Install - USBPORT.SYS and others.

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Hoplol

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May 29, 2016
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Hi, I just updated from windows 7 to 10, and then formatted and installed update 1511 of windows 10. Also had no issues with dpc latency while using windows 7. I've tried everything and haven't been able to resolve this so any help is much appreciated, thanks.

http://i.imgur.com/N2Zs4NR.png

http://i.imgur.com/zYc3Bm1.png

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CONCLUSION
_________________________________________________________________________________________________________
Your system appears to be suitable for handling real-time audio and other tasks without dropouts.
LatencyMon has been analyzing your system for 0:06:06 (h:mm:ss) on all processors.




_________________________________________________________________________________________________________
SYSTEM INFORMATION
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Computer name: DESKTOP-LBCJT64
OS version: Windows 8 , 6.2, build: 9200 (x64)
Hardware: P5E-VM HDMI, , ASUSTeK Computer INC.
CPU: GenuineIntel Intel(R) Core(TM)2 Quad CPU Q9450 @ 2.66GHz
Logical processors: 4
Processor groups: 1
RAM: 4095 MB total




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CPU SPEED
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Reported CPU speed: 320 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
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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): 439.056298
Average measured interrupt to process latency (µs): 3.854942


Highest measured interrupt to DPC latency (µs): 429.775953
Average measured interrupt to DPC latency (µs): 1.350544




_________________________________________________________________________________________________________
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): 60.580
Driver with highest ISR routine execution time: USBPORT.SYS - USB 1.1 & 2.0 Port Driver, Microsoft Corporation


Highest reported total ISR routine time (%): 0.040874
Driver with highest ISR total time: ataport.SYS - ATAPI Driver Extension, Microsoft Corporation


Total time spent in ISRs (%) 0.080296


ISR count (execution time <250 µs): 366421
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
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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): 256.5150
Driver with highest DPC routine execution time: ndis.sys - Network Driver Interface Specification (NDIS), Microsoft Corporation


Highest reported total DPC routine time (%): 0.067026
Driver with highest DPC total execution time: ataport.SYS - ATAPI Driver Extension, Microsoft Corporation


Total time spent in DPCs (%) 0.365580


DPC count (execution time <250 µs): 966716
DPC count (execution time 250-500 µs): 0
DPC count (execution time 500-999 µs): 2
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
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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: chrome.exe


Total number of hard pagefaults 9667
Hard pagefault count of hardest hit process: 6185
Highest hard pagefault resolution time (µs): 2382318.45250
Total time spent in hard pagefaults (%): 9.162231
Number of processes hit: 30




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PER CPU DATA
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CPU 0 Interrupt cycle time (s): 8.410665
CPU 0 ISR highest execution time (µs): 60.580
CPU 0 ISR total execution time (s): 1.078995
CPU 0 ISR count: 333364
CPU 0 DPC highest execution time (µs): 255.170
CPU 0 DPC total execution time (s): 4.789084
CPU 0 DPC count: 902126
_________________________________________________________________________________________________________
CPU 1 Interrupt cycle time (s): 1.546614
CPU 1 ISR highest execution time (µs): 33.03250
CPU 1 ISR total execution time (s): 0.092660
CPU 1 ISR count: 31685
CPU 1 DPC highest execution time (µs): 256.5150
CPU 1 DPC total execution time (s): 0.313617
CPU 1 DPC count: 33995
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CPU 2 Interrupt cycle time (s): 1.264148
CPU 2 ISR highest execution time (µs): 15.420
CPU 2 ISR total execution time (s): 0.003562
CPU 2 ISR count: 1196
CPU 2 DPC highest execution time (µs): 116.77250
CPU 2 DPC total execution time (s): 0.129576
CPU 2 DPC count: 16115
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CPU 3 Interrupt cycle time (s): 1.237651
CPU 3 ISR highest execution time (µs): 10.80
CPU 3 ISR total execution time (s): 0.000670
CPU 3 ISR count: 176
CPU 3 DPC highest execution time (µs): 141.45750
CPU 3 DPC total execution time (s): 0.121416
CPU 3 DPC count: 14482
_________________________________________________________________________________________________________
 
Hi Hoplol ... and welcome to the forums ....


To be completely honest, your safest bet is to go to Start - Settings - Update & security - Recovery - Go Back To Windows 7.

Since you have upgraded to Windows 10 before the July 29, 2016 cutoff point - your computer now has "digital entitlement" to Windows 10. So you can return to Windows 7 where your current set of drivers and programs work well, and at some point in the future, try Windows 10 again once the driver situation is better.

I also find that clean installs do better than upgrades, especially for the older systems.
_______________

If you want to have a go at fixing audio/video lags in Windows 10 ... make sure that you are using Latency Monitor version 6.50 or newer (the older versions produce incorrect readings). You can try having Latency Monitor produce a graph much like your second attached graph -- but have Latency Monitor sort the list of processes by pagefaults. As you noticed, you really don't have a problem with latencies, you have a problem with high hard pagefaults.

Older utilities designed for Windows 7 don't seem to do well in Windows 10 ... especially handy-dandy utilities from the vendors.

It doesn't hurt to hunt for newer versions of drivers, a newer Bios version for the main board, a newer version of big resource users like your antivirus or overclocking utility ... things like that. The drivers to look at first would be your USB devices (gaming mice, keyboards, & sound devices - microphones, headsets, speakers, video/audio capture, mixers, etc....

Lots to try (but the surest way is with what worked before)

Cheers.


[P.S. ... your "digital entitlement" for Windows 10 should stay on the Windows 10 activation servers for a long time, as far as I know. The last article I read about that seemed to indicate that the record stays indefinitely ... just like your normal activation did in the old days for previous versions of Windows.]
 
Late note .... sorry - I wrote the above post in too much of a hurry! On re-reading your post, it seems you've done a clean install since. The "Go Back" option won't be available in the Settings as shown above. If you made a system image backup before the clean install, though, you can use that (or if you made a system image of Windows 7 before trying the first upgrade).
 
I apologize for the formatting, nothing I do seems to fix it.Hi OldGrayGary, I seemed to have fixed the crackling noise sometimes heard in videos just by unplugging 2 of my dvd drives sata ports. I can unrealistically play 6 videos and run a game and audio will not drop out on me.As I was playing the 6 videos latencymon reported :Your system seems to be having difficulty handling real-time audio and other tasks. You may experience drop outs, clicks or pops due to buffer underruns. 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 0:02:29 (h:mm:ss) on all processors. In power options I turned everything on for performance and in the bios I disabled CPU throttling.At the time of this screenshot I had a game (path of exile) running and loaded up a youtube video.http://i.imgur.com/sKgcoYZ.jpghttp://i.imgur.com/0oeeJzR.jpghttp://i.imgur.com/LycY0P6.jpgAs you can see in the first screen shot the hard pagefiles are still very high but not nearly as high as before. I'm still not sure what is going on with USBPORT.SYS.And here are the stats for the latest latencymon run. EDIT** When I posted the original stats the formatting was completly messed up so I ran the exact test again and its telling my pc is suitable for real time handing of audio and other _________________________________________________________________________________________________________CONCLUSION_________________________________________________________________________________________________________Your system appears to be suitable for handling real-time audio and other tasks without dropouts. LatencyMon has been analyzing your system for 0:03:13 (h:mm:ss) on all processors._________________________________________________________________________________________________________SYSTEM INFORMATION_________________________________________________________________________________________________________Computer name: DESKTOP-LBCJT64OS version: Windows 8 , 6.2, build: 9200 (x64)Hardware: P5E-VM HDMI, , ASUSTeK Computer INC.CPU: GenuineIntel Intel(R) Core(TM)2 Quad CPU Q9450 @ 2.66GHzLogical processors: 4Processor groups: 1RAM: 4095 MB total_________________________________________________________________________________________________________CPU SPEED_________________________________________________________________________________________________________Reported CPU speed: 320 MHzMeasured 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): 355.533425Average measured interrupt to process latency (µs): 4.062249Highest measured interrupt to DPC latency (µs): 271.050235Average measured interrupt to DPC latency (µs): 1.355711_________________________________________________________________________________________________________ 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): 61.9450Driver with highest ISR routine execution time: USBPORT.SYS - USB 1.1 & 2.0 Port Driver, Microsoft CorporationHighest reported total ISR routine time (%): 0.055445Driver with highest ISR total time: ataport.SYS - ATAPI Driver Extension, Microsoft CorporationTotal time spent in ISRs (%) 0.097716ISR 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): 882.730Driver with highest DPC routine execution time: ndis.sys - Network Driver Interface Specification (NDIS), Microsoft CorporationHighest reported total DPC routine time (%): 0.511791Driver with highest DPC total execution time: dxgkrnl.sys - DirectX Graphics Kernel, Microsoft CorporationTotal time spent in DPCs (%) 1.151067DPC 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: pathofexile.exeTotal number of hard pagefaults 15701Hard pagefault count of hardest hit process: 14908Highest hard pagefault resolution time (µs): 310774.70750Total time spent in hard pagefaults (%): 7.642039Number of processes hit: 24_________________________________________________________________________________________________________ PER CPU DATA_________________________________________________________________________________________________________CPU 0 Interrupt cycle time (s): 11.371037CPU 0 ISR highest execution time (µs): 61.9450CPU 0 ISR total execution time (s): 0.510428CPU 0 ISR count: 226848CPU 0 DPC highest execution time (µs): 882.730CPU 0 DPC total execution time (s): 7.137707CPU 0 DPC count: 1122432_________________________________________________________________________________________________________CPU 1 Interrupt cycle time (s): 2.716008CPU 1 ISR highest execution time (µs): 34.920CPU 1 ISR total execution time (s): 0.202920CPU 1 ISR count: 80915CPU 1 DPC highest execution time (µs): 243.48250CPU 1 DPC total execution time (s): 1.128681CPU 1 DPC count: 118746_________________________________________________________________________________________________________CPU 2 Interrupt cycle time (s): 1.833712CPU 2 ISR highest execution time (µs): 27.80250CPU 2 ISR total execution time (s): 0.034537CPU 2 ISR count: 10756CPU 2 DPC highest execution time (µs): 209.12750CPU 2 DPC total execution time (s): 0.340147CPU 2 DPC count: 71152_________________________________________________________________________________________________________CPU 3 Interrupt cycle time (s): 1.573482CPU 3 ISR highest execution time (µs): 16.020CPU 3 ISR total execution time (s): 0.006606CPU 3 ISR count: 2008CPU 3 DPC highest execution time (µs): 131.24250CPU 3 DPC total execution time (s): 0.281127CPU 3 DPC count: 55311_________________________________________________________________________________________________________
 
Hi again


Things look pretty good since your latest adjustments. The USBPORT.SYS is on the top of most lists - even on average computers. (And, as I mentioned: it's usually USB I/O devices - these aren't the fastest devices by their nature - though each generation is getting a bit faster). Your system is doing pretty well considering all that video/audio coming and going simultaneously with just 4 GB of system memory. I'm guessing you have a fair amount of experience with system tuning (the Power Options tweaks for maximum performance really do help).

Nice work!

Let us know if you have any other questions.
 
Thanks and yeah this is quite an old PC still runs great. Don't understand why the two dvd drives were giving me so much problem, luckily I ran across a post of someone saying to disconnect them because I would have never guessed it. But yeah I would considered this closed now.
 
Remember USB is a polling bus, and the USB port doesn't "push" data, it "responds" to requests from the USB controller and tells it if it has data or not. The controller knows to ask for data because it (fairly constantly) polls the bus to see if there's anything there and whether or not it has information to supply. If a drive is attached to a USB device and constantly is telling the USB bus that it has (or might have) something to say when the bus is polled, you see USB DPC/ISR activity rise and rise and rise until it starts to impact performance. Removing removable devices like CD/DVD drives and even external hard disks and audio devices when not in use is about the only workaround when you have a "chatty" device (whether it's doing that on purpose or not is another question entirely, of course).
 

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