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Windows 7: High DPC latency!


29 Nov 2012   #1

Vista SP1 Home Premium x64, Wndows 7 RC x64
 
 
High DPC latency!

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:



Quote:
____________________________________________________________________________________________________ _____
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 (s): 38332,052291


____________________________________________________________________________________________________ _____
MEASURED SMIs AND CPU STALLS
____________________________________________________________________________________________________ _____
Highest measured SMI, IPI or CPU stall (s) 164,247228


____________________________________________________________________________________________________ _____
REPORTED DPCs
____________________________________________________________________________________________________ _____
Highest DPC routine execution time (s): 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 s): 2636063
DPC count (execution time 250-500 s): 0
DPC count (execution time 500-999 s): 3670
DPC count (execution time 1000-1999 s): 11399
DPC count (execution time 2000-3999 s): 38
DPC count (execution time >=4000 s): 0


____________________________________________________________________________________________________ _____
REPORTED ISRs
____________________________________________________________________________________________________ _____
Highest ISR routine execution time (s): 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 s): 3789114
ISR count (execution time 250-500 s): 0
ISR count (execution time 500-999 s): 41
ISR count (execution time 1000-1999 s): 0
ISR count (execution time 2000-3999 s): 0
ISR count (execution time >=4000 s): 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 (s): 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 (s): 353,326232
CPU 0 ISR total execution time (s): 15,873429
CPU 0 ISR count: 2424442
CPU 0 DPC highest execution time (s): 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 (s): 548,0
CPU 1 ISR total execution time (s): 12,622868
CPU 1 ISR count: 455083
CPU 1 DPC highest execution time (s): 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 (s): 599,203008
CPU 2 ISR total execution time (s): 11,711346
CPU 2 ISR count: 455326
CPU 2 DPC highest execution time (s): 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 (s): 304,842105
CPU 3 ISR total execution time (s): 12,002229
CPU 3 ISR count: 454304
CPU 3 DPC highest execution time (s): 11146,724311
CPU 3 DPC total execution time (s): 13,398563
CPU 3 DPC count: 435862
____________________________________________________________________________________________________ _____



My System SpecsSystem Spec
.

30 Nov 2012   #2

Vista SP1 Home Premium x64, Wndows 7 RC x64
 
 

No one? What is causing high latency?
My System SpecsSystem Spec
30 Nov 2012   #3

Windows 7, 64 bit Home SP1, Win 8.1.1 Pro 64 bit
 
 

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 System SpecsSystem Spec
.


30 Nov 2012   #4

Windows 7 Ultimate x64 SP1, Windows 8.1 Pro x64
 
 

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 System SpecsSystem Spec
30 Nov 2012   #5
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

It is most likely a driver problem.
My System SpecsSystem Spec
01 Dec 2012   #6

Vista SP1 Home Premium x64, Wndows 7 RC x64
 
 

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 System SpecsSystem Spec
05 Dec 2012   #7

Vista SP1 Home Premium x64, Wndows 7 RC x64
 
 

Here is DPC.txt file...

DepositFiles

Any help would be appreciated!
My System SpecsSystem Spec
05 Dec 2012   #8

Microsoft Windows 8.1 Professional
 
 

Update your videocard driver to latest version, the one you have installed seems damaged or corrupted.
My System SpecsSystem Spec
06 Dec 2012   #9

Vista SP1 Home Premium x64, Wndows 7 RC x64
 
 

Quote   Quote: Originally Posted by OldMX View Post
Update your videocard driver to latest version, the one you have installed seems damaged or corrupted.
Thanks for reply.

Drivers are latest. I have tried three different versions... No big difference.
My System SpecsSystem Spec
07 Dec 2012   #10

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 (s):           39467,076836


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


_________________________________________________________________________________________________________
REPORTED DPCs
_________________________________________________________________________________________________________
Highest DPC routine execution time (s):              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 s):                   393310
DPC count (execution time 250-500 s):                0
DPC count (execution time 500-999 s):                13832
DPC count (execution time 1000-1999 s):              1190
DPC count (execution time 2000-3999 s):              67
DPC count (execution time >=4000 s):                 0


_________________________________________________________________________________________________________
 REPORTED ISRs
_________________________________________________________________________________________________________
Highest ISR routine execution time (s):              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 s):                   116498
ISR count (execution time 250-500 s):                0
ISR count (execution time 500-999 s):                4
ISR count (execution time 1000-1999 s):              0
ISR count (execution time 2000-3999 s):              0
ISR count (execution time >=4000 s):                 0
My System SpecsSystem Spec
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 High DPC latency!




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