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Daily system CPU usage being used at 18%-20% ntoskrnl to blame?


RedBatman

New Member
Posts
10
#1
So I have done a fresh install of 8.1 a few months back on a new SSD, thing is that at times the CPU will jump to 18%-20% and be like that for awhile. When it does go away it will usually not happen for a few days if a week but sometime it will happen twice a day. I thought at first it was a virtual memory issue but that may no be the cause. It all points to ntoskrnl. So I have done tests and everything, could it just be a bad driver or something?
 

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My Computer

System One

  • OS
    8.1

RedBatman

New Member
Posts
10
#2
Here is a document of the DPC results too.

_________________________________________________________________________________________________________
CONCLUSION
_________________________________________________________________________________________________________
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 0:24:36 (h:mm:ss) on all processors.


_________________________________________________________________________________________________________
SYSTEM INFORMATION
_________________________________________________________________________________________________________
Computer name: GABES-LAPTOP
OS version: Windows 8.1 , 6.3, build: 9600 (x64)
Hardware: G750JM, ASUSTeK COMPUTER INC.
CPU: GenuineIntel Intel(R) Core(TM) i7-4700HQ CPU @ 2.40GHz
Logical processors: 8
Processor groups: 1
RAM: 24459 MB total


_________________________________________________________________________________________________________
CPU SPEED
_________________________________________________________________________________________________________
Reported CPU speed: 2394 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): 1373.191672
Average measured interrupt to process latency (µs): 6.615350

Highest measured interrupt to DPC latency (µs): 1358.223840
Average measured interrupt to DPC latency (µs): 0.838339


_________________________________________________________________________________________________________
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): 141.868421
Driver with highest ISR routine execution time: ndis.sys - Network Driver Interface Specification (NDIS), Microsoft Corporation

Highest reported total ISR routine time (%): 0.001370
Driver with highest ISR total time: storport.sys - Microsoft Storage Port Driver, Microsoft Corporation

Total time spent in ISRs (%) 0.002808

ISR count (execution time <250 µs): 38679
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): 299.057644
Driver with highest DPC routine execution time: Wdf01000.sys - Kernel Mode Driver Framework Runtime, Microsoft Corporation

Highest reported total DPC routine time (%): 0.015568
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 (%) 0.024569

DPC count (execution time <250 µs): 2245058
DPC count (execution time 250-500 µs): 0
DPC count (execution time 500-999 µs): 1
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.

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: explorer.exe

Total number of hard pagefaults 608
Hard pagefault count of hardest hit process: 262
Number of processes hit: 18


_________________________________________________________________________________________________________
PER CPU DATA
_________________________________________________________________________________________________________
CPU 0 Interrupt cycle time (s): 36.021456
CPU 0 ISR highest execution time (µs): 90.372598
CPU 0 ISR total execution time (s): 0.118851
CPU 0 ISR count: 13502
CPU 0 DPC highest execution time (µs): 218.007519
CPU 0 DPC total execution time (s): 2.245318
CPU 0 DPC count: 2166371
_________________________________________________________________________________________________________
CPU 1 Interrupt cycle time (s): 30.739896
CPU 1 ISR highest execution time (µs): 141.868421
CPU 1 ISR total execution time (s): 0.103068
CPU 1 ISR count: 11915
CPU 1 DPC highest execution time (µs): 222.205514
CPU 1 DPC total execution time (s): 0.236537
CPU 1 DPC count: 20678
_________________________________________________________________________________________________________
CPU 2 Interrupt cycle time (s): 14.725389
CPU 2 ISR highest execution time (µs): 130.517962
CPU 2 ISR total execution time (s): 0.024905
CPU 2 ISR count: 2928
CPU 2 DPC highest execution time (µs): 207.510025
CPU 2 DPC total execution time (s): 0.122029
CPU 2 DPC count: 20338
_________________________________________________________________________________________________________
CPU 3 Interrupt cycle time (s): 35.13130
CPU 3 ISR highest execution time (µs): 101.507101
CPU 3 ISR total execution time (s): 0.027923
CPU 3 ISR count: 3194
CPU 3 DPC highest execution time (µs): 191.017544
CPU 3 DPC total execution time (s): 0.064429
CPU 3 DPC count: 5927
_________________________________________________________________________________________________________
CPU 4 Interrupt cycle time (s): 12.929120
CPU 4 ISR highest execution time (µs): 51.448622
CPU 4 ISR total execution time (s): 0.014216
CPU 4 ISR count: 1600
CPU 4 DPC highest execution time (µs): 171.917293
CPU 4 DPC total execution time (s): 0.075838
CPU 4 DPC count: 12549
_________________________________________________________________________________________________________
CPU 5 Interrupt cycle time (s): 34.813858
CPU 5 ISR highest execution time (µs): 88.637845
CPU 5 ISR total execution time (s): 0.014807
CPU 5 ISR count: 1525
CPU 5 DPC highest execution time (µs): 155.149123
CPU 5 DPC total execution time (s): 0.035232
CPU 5 DPC count: 4115
_________________________________________________________________________________________________________
CPU 6 Interrupt cycle time (s): 42.199668
CPU 6 ISR highest execution time (µs): 61.711779
CPU 6 ISR total execution time (s): 0.020246
CPU 6 ISR count: 3211
CPU 6 DPC highest execution time (µs): 299.057644
CPU 6 DPC total execution time (s): 0.099827
CPU 6 DPC count: 11411
_________________________________________________________________________________________________________
CPU 7 Interrupt cycle time (s): 50.447452
CPU 7 ISR highest execution time (µs): 94.105263
CPU 7 ISR total execution time (s): 0.007544
CPU 7 ISR count: 804
CPU 7 DPC highest execution time (µs): 173.418546
CPU 7 DPC total execution time (s): 0.022008
CPU 7 DPC count: 3670
_________________________________________________________________________________________________________
 

My Computer

System One

  • OS
    8.1

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