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LatencyMon and CPU throttling


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#1
pkbutterfield

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I ran a LatencyMon scan and I need help shutting down CPU throttling. I use Live 9 so it really interferes with the CPU on playback. I copied the report of the scan here.

 

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  0:10:45  (h:mm:ss) on all processors.
 
 
_________________________________________________________________________________________________________
SYSTEM INFORMATION
_________________________________________________________________________________________________________
Computer name:                                        PATRICK-PC
OS version:                                           Windows 7 Service Pack 1, 6.1, build: 7601 (x64)
Hardware:                                             Dell System XPS L502X, Dell Inc.         , Dell Inc., 0YR8NN
CPU:                                                  GenuineIntel Intel® Core™ i5-2450M CPU @ 2.50GHz
Logical processors:                                   4
Processor groups:                                     1
RAM:                                                  6038 MB total
 
 
_________________________________________________________________________________________________________
CPU SPEED
_________________________________________________________________________________________________________
Reported CPU speed:                                   2494.0 MHz
Measured CPU speed:                                   529.0 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 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):   81135.190698
Average measured interrupt to process latency (µs):   16.689927
 
Highest measured interrupt to DPC latency (µs):       7586.219353
Average measured interrupt to DPC latency (µs):       2.307377
 
 
_________________________________________________________________________________________________________
 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):              120.413793
Driver with highest ISR routine execution time:       i8042prt.sys - i8042 Port Driver, Microsoft Corporation
 
Highest reported total ISR routine time (%):          0.083531
Driver with highest ISR total time:                   i8042prt.sys - i8042 Port Driver, Microsoft Corporation
 
Total time spent in ISRs (%)                          0.153983
 
ISR count (execution time <250 µs):                   821245
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):              28110.264635
Driver with highest DPC routine execution time:       ndis.sys - NDIS 6.20 driver, Microsoft Corporation
 
Highest reported total DPC routine time (%):          0.197702
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 (%)                          0.577655
 
DPC count (execution time <250 µs):                   3203056
DPC count (execution time 250-500 µs):                0
DPC count (execution time 500-999 µs):                8056
DPC count (execution time 1000-1999 µs):              122
DPC count (execution time 2000-3999 µs):              39
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:                 msmpeng.exe
 
Total number of hard pagefaults                       13676
Hard pagefault count of hardest hit process:          6879
Highest hard pagefault resolution time (µs):          1318306.944266
Total time spent in hard pagefaults (%):              6.195823
Number of processes hit:                              16
 
 
_________________________________________________________________________________________________________
 PER CPU DATA
_________________________________________________________________________________________________________
CPU 0 Interrupt cycle time (s):                       27.843859
CPU 0 ISR highest execution time (µs):                120.413793
CPU 0 ISR total execution time (s):                   3.974313
CPU 0 ISR count:                                      821245
CPU 0 DPC highest execution time (µs):                28110.264635
CPU 0 DPC total execution time (s):                   13.943623
CPU 0 DPC count:                                      3103899
_________________________________________________________________________________________________________
CPU 1 Interrupt cycle time (s):                       11.135448
CPU 1 ISR highest execution time (µs):                0.0
CPU 1 ISR total execution time (s):                   0.0
CPU 1 ISR count:                                      0
CPU 1 DPC highest execution time (µs):                780.623496
CPU 1 DPC total execution time (s):                   0.260155
CPU 1 DPC count:                                      29409
_________________________________________________________________________________________________________
CPU 2 Interrupt cycle time (s):                       9.430633
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):                1161.863673
CPU 2 DPC total execution time (s):                   0.446765
CPU 2 DPC count:                                      49960
_________________________________________________________________________________________________________
CPU 3 Interrupt cycle time (s):                       6.215074
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):                799.157979
CPU 3 DPC total execution time (s):                   0.258756
CPU 3 DPC count:                                      28023
_____________________________________________________________________________________________________

Edited by pkbutterfield, 26 October 2014 - 01:27 PM.

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#2
iammykyl

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Gday.

Sorry for the long delay, your topic got a bit lost.

Please do a manual system restore, name it, Before Dell System Analyses, then go to the link below, perform the System Analyses, follow any prompts.  Let us know the results.

http://www.dell.com/...s-l502x/drivers

 

Next, do a manual system restore, name it, Before Dell Diagnostic. then go to the link below and perform the Advance, Complete Diagnostic. 

http://www.dell.com/...-l502x/diagnose

 

If you have any difficulties running the tools in Chrome/FF, try using IE. 


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#3
pkbutterfield

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Hello,

Thank you for the response, after running the Dell system analysis it say that i should update the Intel Management Engine Interface Driver. After the diagnostic scan, it said everything was up to date but my warrenty is up. I have a Dell XPS 15 L502X early 2011. 


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#4
iammykyl

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Thanks for the update.

Set a manual system Restore, go to the link, download and install the Intel Management Engine Interface Driver > http://www.dell.com/...s-l502x/drivers

 

I am unable to find any guides where I can see the BIOS screens.   Can you look under power management and disable any settings that limit CPU performance, except, overheat thermal control. 

Could be, "cool and quiet, speed step, enable all cores"


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#5
iammykyl

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It's been quite a while since we heard from you.   Have you resolved your problem?   A update would be appreciated.

 

Thanks.


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