High DPC latency!

E

ElephantTLK

New member
Local time
7:47 PM
Messages
14
Hi!

I have problem with latency! I have Sony Vaio VPCF12M1E/H laptop with Samsung SSD.
Current OS is Windows 7 x64.

In last two days i have reinstalled OS three times! And still no success.
I have tried running LatencyMon with default OS (microsoft) drivers and with latest drivers from manufacturer.

I have tried to disable many devices in device manager step by step but the problem is still here.

So i guess its not software... Am i right?
It is very annoying! And i cant use this laptop like that! If i watch youtube i hear "clicks & pops" every few seconds. Annoying!

Is there any way to solve this problem?

One example:

untitled.jpg


_________________________________________________________________________________________________________
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 or more DPC routines that belong to a driver running in your system appear to be executing for too long. 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 0:32:55 (h:mm:ss) on all processors in the system.


_________________________________________________________________________________________________________
SYSTEM INFORMATION
_________________________________________________________________________________________________________
Computer name: TOM-PC
OS version: Windows 7 , 6.1, build: 7600 (x64)
CPU: GenuineIntel Intel(R) Core(TM) i5 CPU M 520 @ 2.40GHz
Logical processors: 4
Processor groups: 1
RAM: 4014 MB total


_________________________________________________________________________________________________________
CPU SPEED
_________________________________________________________________________________________________________
Reported CPU speed: 2394,0 MHz
Measured CPU speed: 1715,0 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.


_________________________________________________________________________________________________________
MEASURED KERNEL TIMER LATENCIES
_________________________________________________________________________________________________________
Highest measured kernel timer latency (µs): 38332,052291


_________________________________________________________________________________________________________
MEASURED SMIs AND CPU STALLS
_________________________________________________________________________________________________________
Highest measured SMI, IPI or CPU stall (µs) 164,247228


_________________________________________________________________________________________________________
REPORTED DPCs
_________________________________________________________________________________________________________
Highest DPC routine execution time (µs): 40791,541353
Driver with highest DPC routine execution time: nvlddmkm.sys - NVIDIA Windows Kernel Mode Driver, Version 306.97 , NVIDIA Corporation

Highest reported total DPC routine time (%): 0,392327
Driver with highest DPC total execution time: nvlddmkm.sys - NVIDIA Windows Kernel Mode Driver, Version 306.97 , NVIDIA Corporation

Total time spent in DPCs (%) 0,727341

DPC count (execution time <250 µs): 2636063
DPC count (execution time 250-500 µs): 0
DPC count (execution time 500-999 µs): 3670
DPC count (execution time 1000-1999 µs): 11399
DPC count (execution time 2000-3999 µs): 38
DPC count (execution time >=4000 µs): 0


_________________________________________________________________________________________________________
REPORTED ISRs
_________________________________________________________________________________________________________
Highest ISR routine execution time (µs): 599,203008
Driver with highest ISR routine execution time: dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation

Highest reported total ISR routine time (%): 0,263908
Driver with highest ISR total time: dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation

Total time spent in ISRs (%) 0,660763

ISR count (execution time <250 µs): 3789114
ISR count (execution time 250-500 µs): 0
ISR count (execution time 500-999 µs): 41
ISR count (execution time 1000-1999 µs): 0
ISR count (execution time 2000-3999 µs): 0
ISR count (execution time >=4000 µs): 0


_________________________________________________________________________________________________________
REPORTED HARD PAGEFAULTS
_________________________________________________________________________________________________________
Process with highest pagefault count: none

Total number of hard pagefaults 14932
Hard pagefault count of hardest hit process: 7951
Highest hard pagefault resolution time (µs): 150963,956140
Total time spent in hard pagefaults (%): 0,129215
Number of processes hit: 0


_________________________________________________________________________________________________________
PER CPU DATA
_________________________________________________________________________________________________________
CPU 0 Interrupt cycle time (s): 39,917208
CPU 0 ISR highest execution time (µs): 353,326232
CPU 0 ISR total execution time (s): 15,873429
CPU 0 ISR count: 2424442
CPU 0 DPC highest execution time (µs): 2063,013367
CPU 0 DPC total execution time (s): 19,080266
CPU 0 DPC count: 1452965
_________________________________________________________________________________________________________
CPU 1 Interrupt cycle time (s): 27,105590
CPU 1 ISR highest execution time (µs): 548,0
CPU 1 ISR total execution time (s): 12,622868
CPU 1 ISR count: 455083
CPU 1 DPC highest execution time (µs): 40791,541353
CPU 1 DPC total execution time (s): 13,218109
CPU 1 DPC count: 361174
_________________________________________________________________________________________________________
CPU 2 Interrupt cycle time (s): 26,444516
CPU 2 ISR highest execution time (µs): 599,203008
CPU 2 ISR total execution time (s): 11,711346
CPU 2 ISR count: 455326
CPU 2 DPC highest execution time (µs): 5193,181704
CPU 2 DPC total execution time (s): 11,773562
CPU 2 DPC count: 401176
_________________________________________________________________________________________________________
CPU 3 Interrupt cycle time (s): 26,369461
CPU 3 ISR highest execution time (µs): 304,842105
CPU 3 ISR total execution time (s): 12,002229
CPU 3 ISR count: 454304
CPU 3 DPC highest execution time (µs): 11146,724311
CPU 3 DPC total execution time (s): 13,398563
CPU 3 DPC count: 435862
_________________________________________________________________________________________________________
Click to expand...
 

My Computer

OS
Vista SP1 Home Premium x64, Wndows 7 RC x64
No one? What is causing high latency?
 

My Computer

OS
Vista SP1 Home Premium x64, Wndows 7 RC x64
Run the DPC latency checker and see what it says. I got some "bad" results with that latency program but DPC latency checker did not show it and I was not having any problems. Just ran it to see.

DPC Latency Checker

As far as drivers, the PC Vendor's sound drivers are preferred. Non-Vendor drivers many times do not work correctly.

Wi-Fi is one thing that is known to cause pops clicks, etc. Disable Wi-Fi in the Device Manager and then see if the Latency program shows any change.
 

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
My Own Build
OS
Windows 10 64 bit
CPU
Intel i7 6700K
Motherboard
ASUS ROG Maximus VIII Hero
Memory
16GB Corsair Dominator
Graphics Card(s)
Intel CPU Graphics
Sound Card
RealTek
Monitor(s) Displays
27" Dell S2719dgf
Screen Resolution
2560X1440
Hard Drives
1 TB Samsung 850 EVO SSD for Win 10 Pro
500GB Samsung 850 EVO SSD for Win 10 Insider
2 TB drive for backup
PSU
EVGA Supernova 750G2
Case
BeQuiet Silent Base 600
Cooling
Deepcool Captain 120EX
Keyboard
Microsoft Wireless 2000
Mouse
Microsoft wireless
Internet Speed
100 MB/sec (Cable)
Antivirus
Microsoft Defender and Malwarebytes
Browser
Edge/Firefox
Other Info
Cakewalk (Sonar) by BandLab and Studio One 4.1 Pro recording studio software. MOTU 896Mk3 Hybrid recording interface, Frontier Tranzport wireless control unit, Behringer X-Touch Control Surface.
Five USB connected optical drives for CD Audio production using Nero BurningROM
Have you disabled any CPU variable speed settings as recommended by the latency monitor?

"CPU SPEED
____________________________________________________________________________________________________ _____
Reported CPU speed: 2394,0 MHz
Measured CPU speed: 1715,0 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."
 

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
Custom Built
OS
Windows 10 Pro x64, Windows 8.1 Pro x64, Windows 7 Ultimate x64 SP1,
CPU
INTEL i9-7920X LGA 2066
Motherboard
Gigabyte X299-WU8 F3
Memory
64 GB (4 X 16 GB) G-Skill V Series DDR4 3200 Quad Channel
Graphics Card(s)
EVGA GTX 1060 SC 3 GB
Sound Card
Realtek Onboard ALC1220
Monitor(s) Displays
2 x Samsung S27E310
Screen Resolution
1920x1080
Hard Drives
Samsung 2 x 970 EVO Plus 500 GB NVMe
1 x 6TB WD 6003FZBX SATA
1 x 6TB WD 60EFRX SATA
12 x 3TB WD 30EFRX SATA
PSU
Seasonic X-1050
Case
Thermaltake Armor+
Cooling
Corsair H80i V2 Liquid AOI Cooler
Keyboard
Logitech G510s
Mouse
Logitech MX Master 2S
Internet Speed
200 Mb/s
Antivirus
ESET NOD32 13.1
Browser
EDGE (Dev, Canary, Beta), Chrome
Other Info
ASUS RT-AC68U router
Malwarebytes 4.0.4
It is most likely a driver problem.
 

My Computer

Computer Manufacturer/Model Number
HP, Dell, Gateway, Toshiba - 4 laptops and 2 desktops
OS
Vista, Windows7, Mint Mate, Zorin, Windows 8
CPU
from 1.6GHz Duo to i7
Monitor(s) Displays
2x HP w2207
Hard Drives
5x HDD, 7x SSD, 12x Externals
Keyboard
with trackball - no mices
Mouse
Trackball mice
Internet Speed
DSL 6000
I have PC vendors drivers. Updated to latest. And as i said os was installed three times. And it is still the same thing.
With or without pc vendors drivers.
I have disabled some devices in device manager. Wlan, soundcard, sd/memory card reader... Still not better.

I have tried high performance plan with CPU POWER 100% both min and max and is still the same thing.
There are no setting in BIOS to play with...
 

My Computer

OS
Vista SP1 Home Premium x64, Wndows 7 RC x64
Update your videocard driver to latest version, the one you have installed seems damaged or corrupted.
 

My Computer

Computer type
PC/Desktop
OS
Microsoft Windows 10 Professional / Windows 7 Professional
CPU
Intel i5-3570
Motherboard
Lenovo Mahobay
Memory
16GB DDR3
Graphics Card(s)
AMD Radeon HD 7850 2GB
Sound Card
(1) Realtek HD Audio (2) AMD HD Audio
Monitor(s) Displays
LG LS192WS
Screen Resolution
1440 x 900 @ 32bit color
Hard Drives
(1) SUV300S37A/120G (2) ST3500413AS SATA Disk Device AHCI mode enabled.
PSU
Corsair HX620
Case
Thermaltake V4 Black Edition
Cooling
Cooler Master Hyper 212 + Artic Silver 5 on CPU/GPU
Keyboard
Dell SK-8115
Mouse
Razer Copperhead with MAPED mat (awesome!)
Internet Speed
100 Mbps up/down
Browser
Chrome
OldMX said:
Update your videocard driver to latest version, the one you have installed seems damaged or corrupted.
Click to expand...

Thanks for reply.

Drivers are latest. I have tried three different versions... No big difference.
 

My Computer

OS
Vista SP1 Home Premium x64, Wndows 7 RC x64
Today i have installed Windows 8 and tried... Exact same results as in Windows 7. So this is most probably not software problem or is it?

Code: 
_________________________________________________________________________________________________________
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 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  0:02:35  (h:mm:ss) on all processors in the system.


_________________________________________________________________________________________________________
SYSTEM INFORMATION
_________________________________________________________________________________________________________
Computer name:                                        VAIO
OS version:                                           Windows 8 , 6.2, build: 9200 (x64)
CPU:                                                  GenuineIntel Intel(R) Core(TM) i5 CPU M 520 @ 2.40GHz
Logical processors:                                   4
Processor groups:                                     1
RAM:                                                  4014 MB total


_________________________________________________________________________________________________________
CPU SPEED
_________________________________________________________________________________________________________
Reported CPU speed:                                   2394,0 MHz
Measured CPU speed:                                   2751,0 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.


_________________________________________________________________________________________________________
MEASURED KERNEL TIMER LATENCIES
_________________________________________________________________________________________________________
Highest measured kernel timer latency (µs):           39467,076836


_________________________________________________________________________________________________________
MEASURED SMIs AND CPU STALLS
_________________________________________________________________________________________________________
Highest measured SMI, IPI or CPU stall (µs)           31,652365


_________________________________________________________________________________________________________
REPORTED DPCs
_________________________________________________________________________________________________________
Highest DPC routine execution time (µs):              28005,186299
Driver with highest DPC routine execution time:       nvlddmkm.sys - NVIDIA Windows Kernel Mode Driver, Version 306.97 , NVIDIA Corporation

Highest reported total DPC routine time (%):          2,943578
Driver with highest DPC total execution time:         ndis.sys - NDIS 6.30 driver, Microsoft Corporation

Total time spent in DPCs (%)                          3,939881

DPC count (execution time <250 µs):                   393310
DPC count (execution time 250-500 µs):                0
DPC count (execution time 500-999 µs):                13832
DPC count (execution time 1000-1999 µs):              1190
DPC count (execution time 2000-3999 µs):              67
DPC count (execution time >=4000 µs):                 0


_________________________________________________________________________________________________________
 REPORTED ISRs
_________________________________________________________________________________________________________
Highest ISR routine execution time (µs):              320,745196
Driver with highest ISR routine execution time:       dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation

Highest reported total ISR routine time (%):          0,312663
Driver with highest ISR total time:                   dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation

Total time spent in ISRs (%)                          0,560939

ISR count (execution time <250 µs):                   116498
ISR count (execution time 250-500 µs):                0
ISR count (execution time 500-999 µs):                4
ISR count (execution time 1000-1999 µs):              0
ISR count (execution time 2000-3999 µs):              0
ISR count (execution time >=4000 µs):                 0
 

My Computer

OS
Vista SP1 Home Premium x64, Wndows 7 RC x64
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