[W10ProV1703b15063 x64] DPC & CPU throttling

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blaqmoss

Member
Joined
Mar 2, 2017
Posts
13
Hello, Hello, I have Intel nuc intel nuc6i7kyk, but I can't get nice results in latencymon.

I use Intel SSD 600p Series (256GB) and Ballistix Sport LT 8GB Kit (2 x 4GB) DDR4-2400 SODIMM. I use only external usb audiointerface RME Babyface Pro and mouse

I have problems with CPU throttling.What I have done:
-Disabled Turbo boost in Bios
-Disabled Speedstep in Bios
-Disabled Speedshift in Bios
-Disabled HyperThreading
-Changed Power plan to High performance
-Disabled core parking
-Disabled Visual Effects
-Processor Scheduling set to "Background services"

What I do wrong?


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 1:50:30 (h:mm:ss) on all processors.




_________________________________________________________________________________________________________
SYSTEM INFORMATION
_________________________________________________________________________________________________________
Computer name: WINDOWS-0C76TF1
OS version: Windows 10 , 10.0, build: 15063 (x64)
Hardware: Intel Corporation, NUC6i7KYB
CPU: GenuineIntel Intel(R) Core(TM) i7-6770HQ CPU @ 2.60GHz
Logical processors: 4
Processor groups: 1
RAM: 8081 MB total




_________________________________________________________________________________________________________
CPU SPEED
_________________________________________________________________________________________________________
Reported CPU speed: 2592 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): 2385.381774
Average measured interrupt to process latency (µs): 1.902423


Highest measured interrupt to DPC latency (µs): 2384.196589
Average measured interrupt to DPC latency (µs): 0.632656




_________________________________________________________________________________________________________
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): 22.108025
Driver with highest ISR routine execution time: Wdf01000.sys - Kernel Mode Driver Framework Runtime, Microsoft Corporation


Highest reported total ISR routine time (%): 0.004661
Driver with highest ISR total time: Wdf01000.sys - Kernel Mode Driver Framework Runtime, Microsoft Corporation


Total time spent in ISRs (%) 0.004661


ISR count (execution time <250 µs): 4240452
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): 132.445988
Driver with highest DPC routine execution time: Wdf01000.sys - Kernel Mode Driver Framework Runtime, Microsoft Corporation


Highest reported total DPC routine time (%): 0.079738
Driver with highest DPC total execution time: Wdf01000.sys - Kernel Mode Driver Framework Runtime, Microsoft Corporation


Total time spent in DPCs (%) 0.141988


DPC count (execution time <250 µs): 24645659
DPC count (execution time 250-500 µs): 0
DPC count (execution time 500-999 µs): 0
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.




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
_________________________________________________________________________________________________________
CPU 0 Interrupt cycle time (s): 73.923933
CPU 0 ISR highest execution time (µs): 22.108025
CPU 0 ISR total execution time (s): 1.235989
CPU 0 ISR count: 4240441
CPU 0 DPC highest execution time (µs): 132.445988
CPU 0 DPC total execution time (s): 34.547614
CPU 0 DPC count: 23228920
_________________________________________________________________________________________________________
CPU 1 Interrupt cycle time (s): 15.900704
CPU 1 ISR highest execution time (µs): 1.996914
CPU 1 ISR total execution time (s): 0.000008
CPU 1 ISR count: 11
CPU 1 DPC highest execution time (µs): 47.093364
CPU 1 DPC total execution time (s): 0.749178
CPU 1 DPC count: 445196
_________________________________________________________________________________________________________
CPU 2 Interrupt cycle time (s): 15.262867
CPU 2 ISR highest execution time (µs): 0.0
CPU 2 ISR total execution time (s): 0.0
CPU 2 ISR count: 0
CPU 2 DPC highest execution time (µs): 46.881173
CPU 2 DPC total execution time (s): 0.741643
CPU 2 DPC count: 416258
_________________________________________________________________________________________________________
CPU 3 Interrupt cycle time (s): 16.201639
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): 52.215278
CPU 3 DPC total execution time (s): 1.616672
CPU 3 DPC count: 555285
_________________________________________________________________________________________________________
 
Re: DPC latency - CPU throttling

Answers
Read More:

Files Dropbox - logs.zip
 
Re: DPC latency - CPU throttling

Hello, I've just updated Intel® HD Graphics Driver, but it doesn't solve the problem
 
Re: DPC latency - CPU throttling

blaqmoss said:
Hello, I've just updated Intel® HD Graphics Driver, but it doesn't solve the problem
Click to expand...

Try uninstalling the driver and letting Windows install the driver from Windows Update.

Open Device Manager, right-click (or tap and hold) the Intel Display adapter under Display adapters, and select Uninstall Device. Put a tick in the option to Delete the driver software for this device. Restart your PC and Windows will attempt to reinstall the driver.
Click to expand...
 
Re: DPC latency - CPU throttling

Hi blaqmoss. :welcome:


If you are not using bluetooth, I'd remove Intel® Bluetooth Technology-Based Driver for Windows 8.1, 64-Bit* for Intel® NUC.
Your MSINFO log shows lots of problems with zeroconfigservice.exe, that should be the mentioned driver/software (but I could be wrong... Later I found it seems to be Intel Wireless Technology-Based Driver).

If you find how to remove it on your own, ok.

Otherwise you can try the following procedure (at your own risk... There shouldn't be risks, but who knows. Be prepared: new system restore point, backup of your important data and a full system image).

Download the following drivers (clickable links in golden rod color), uninstall them along with bluetooth driver, then reinstall only these ones:
- Intel® Gigabit Ethernet Network Connection Driver for Intel® NUC Kit NUC6i3SY, NUC6i5SY, NUC6i7KYK (LAN driver for Intel® NUC Kit with the Intel® Gigabit Ethernet Network Connection).
- Intel® Wireless Technology-Based Driver for Intel® NUC Kit NUC6i3SY, NUC6i5SY, and NUC6i7KYK (wireless-WiFi driver for the Intel® Wireless Adapter installed in the Intel® NUC Kit NUC6i[x]SY and NUC6i7KY).
It seems you have version 19.60 installed, whereas this is version 19.70.

If you are still unsure, like I am, wait writhziden's opinion (or someone else more experienced than me).
 
Last edited:
Re: [W10ProV1703b15063 x64] DPC latency - CPU throttling

Thank you for the replies! From time to time storport.sys causing dropouts too, any ideas? I'm using NVMe SSD (intel 600p) with standart NVMe windows driver
 
Re: DPC latency - CPU throttling

xilolee said:
Hi blaqmoss. :welcome:


If you are not using bluetooth, I'd remove Intel® Bluetooth Technology-Based Driver for Windows 8.1, 64-Bit* for Intel® NUC.
Your MSINFO log shows lots of problems with zeroconfigservice.exe, that should be the mentioned driver/software (but I could be wrong... Later I found it seems to be Intel Wireless Technology-Based Driver).

If you find how to remove it on your own, ok.

Otherwise you can try the following procedure (at your own risk... There shouldn't be risks, but who knows. Be prepared: new system restore point, backup of your important data and a full system image).

Download the following drivers (clickable links in golden rod color), uninstall them along with bluetooth driver, then reinstall only these ones:
- Intel® Gigabit Ethernet Network Connection Driver for Intel® NUC Kit NUC6i3SY, NUC6i5SY, NUC6i7KYK (LAN driver for Intel® NUC Kit with the Intel® Gigabit Ethernet Network Connection).
- Intel® Wireless Technology-Based Driver for Intel® NUC Kit NUC6i3SY, NUC6i5SY, and NUC6i7KYK (wireless-WiFi driver for the Intel® Wireless Adapter installed in the Intel® NUC Kit NUC6i[x]SY and NUC6i7KY).
It seems you have version 19.60 installed, whereas this is version 19.70.

If you are still unsure, like I am, wait writhziden's opinion (or someone else more experienced than me).
Click to expand...

I don't have Intel® Bluetooth Technology-Based Driver, I disabled bluetooth in BIOS. I reinstalled lan and wifi drivers, but it doesn't solve the problem:huh:. Wifi is disabled in BIOS too.
 
Re: [W10ProV1703b15063 x64] DPC latency - CPU throttling

writhziden said:
blaqmoss said:
Thank you for the replies! From time to time storport.sys causing dropouts too, any ideas? I'm using NVMe SSD (intel 600p) with standart NVMe windows driver
Click to expand...
Click to expand...
writhziden said:
See if running with the Microsoft drivers makes a difference:

The Microsoft Driver might also be listed as Microsoft Storage Spaces Controller
Click to expand...
I already have standart Microsoft Storage Spaces Controller and it's the only one listed in the "list of device drivers on my computer" when I try to update it device.png
 
Re: DPC latency - CPU throttling

blaqmoss said:
Wifi is disabled in BIOS too.
Click to expand...
Try to disable the Wi-Fi driver in device manager (network adapters) and to stop services and software related to it.
I.e., check if zeroconfigservice.exe won't start at all after you disabled the Wi-Fi driver.
 
xilolee said:
Doesn't it start, now?
Try Intel HD Graphics Driver for Win10 for Intel NUC Kit NUC6i7KYK.

Are you using an external power supply for your RME Babyface Pro?
Does the problem remain when you unplug RME Babyface Pro?
Click to expand...

I updated Intel HD Graphics Driver, disabled network services (zeroconfig is stopped) and tested with RME Babyface (without power supply) and with internal audio. Both have the problems with CPU throttling. Sometimes latencymon shows, that the problem is in storport.sys, sometimes it doesn't show which driver is the problematic one(it can show Wdf01000.sys or HDAudBus.sys (for internal audio)), the line with "Highest measured interrupt to process latency" is red.
 
Latest firmware version for your Intel SSD 600p Series 256GB should be 121c.
Latest Intel SSD Firmware Update Tool v2.2.3 (8 Sep 2017) should install that one, if you didn't already installed it in the past.
But Intel suggests you should use Intel Solid State Drive Toolbox instead of the firmware update tool.
It also allows you to check your SSD firmware.
Latest Intel Solid State Drive Toolbox v3.4.7 is dated 8 Sep 2017.

I can't find either your SSD firmware, or intel ssd toolbox in your MSINFO log...
It also seems your system is using stornvme.sys (Microsoft Standard NVM Express Driver): I think intel should have created its own driver and your machine should use that one, but I'm not sure of this.
Maybe you could try to find that intel driver through device manager (if you find it, be prepared before change it: system image and system restore).

Is Dropbox still installed on your machine?
Did you try to run your machine without it?
 
Last edited:
xilolee said:
Latest firmware version for your Intel SSD 600p Series 256GB should be 121c.
Latest Intel SSD Firmware Update Tool v2.2.3 (8 Sep 2017) should install that one, if you didn't already installed it in the past.
But Intel suggests you should use Intel Solid State Drive Toolbox instead of the firmware update tool.
It also allows you to check your SSD firmware.
Latest Intel Solid State Drive Toolbox v3.4.7 is dated 8 Sep 2017.

I can't find either your SSD firmware, or intel ssd toolbox in your MSINFO log...
It also seems your system is using stornvme.sys (Microsoft Standard NVM Express Driver): I think intel should have created its own driver and your machine should use that one, but I'm not sure of this.
Maybe you could try to find that intel driver through device manager (if you find it, be prepared before change it: system image and system restore).

Is Dropbox still installed on your machine?
Did you try to run your machine without it?
Click to expand...

Hello, I have the latest firmware ans ssd toolbox. I'm using the latest Microsoft Standard NVM Express Driver (10.0.1.15063.0).
Dropbox is still on my machine, but I exit the app before testing. The problem still exists.

I stopped zerocongif and made a new trace file, maybe it will help trace.etl
 
The problem is that WDF (Windows Driver Framework) is hiding what driver(s) are actually responsible for the interrupts and DPCs.

Please collect another trace, but instead of just diageasy use the following

Code: 
xperf.exe -on diageasy+WDF_DPC+WDF_INTERRUPT+0x48000000+PROC_THREAD+LOADER+INTERRUPT+DPC+CSWITCH+TIMER+CLOCKINT -stackwalk TimerSetPeriodic+TimerSetOneShot+CSwitch+readythread+profile -clocktype perfcounter -buffersize 1024 -minbuffers 1024

Then like before, to stop it run:

Code: 
xperf.exe -d "%userprofile%\Desktop\trace.etl"

Also grab a second trace using wpr.exe
Code: 
wpr.exe -start WdfTraceLoggingProvider

Like before, record when the issues occur, afterwards stop it.

Code: 
wpr.exe -stop "%userprofile%\Desktop\trace2.etl"
 
Hello! I've collected the first trace: trace.etl But I can't collect the second, I got " The Logging Mode does not match with the profile passed.

Error code: 0xc5584017"
 
Looks like the vast majority of DPC activity in the trace you posted is from USBXHCI.sys, the USB 3.0 driver. Do you have anything plugged into your USB ports besides a mouse/keyboard? You may want to unplug everything and see if the audio issues continue, if they cease, try plugging things in one at a time to identify the faulty port or device.

I'd suggest making sure you are using the latest chipset drivers from Intel - here is Intel's official tool to check for driver updates.
 

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