Hi guys,
Recently my Dell Inspiron 7720 laptop has been having latency issues. I've had this laptop since early 2013 and have had no such issues until just over a week go. I have been scouring the net for fixes but since it doesn't seem to be the kind of issue that has one fix for all I am now at your mercy
.
I followed an online guide to disable CPU throttling and have set my PC settings to performance as opposed to battery saving settings (it's pretty much always plugged in anyway).
I'm running:
i5 2.6Ghz
Windows 8 64 bit
6gb RAM
Intel HD graphics 4000
Nvidia GeForce GT 650M
I've ran latencyMon, here's the report:
_________________________________________________________________________________________________________
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 0:14:25 (h:mm:ss) on all processors.
_________________________________________________________________________________________________________
SYSTEM INFORMATION
_________________________________________________________________________________________________________
Computer name: MARC
OS version: Windows 8 , 6.2, build: 9200 (x64)
Hardware: Inspiron 7720, Dell Inc. , 04M3YM
CPU: GenuineIntel Intel(R) Core(TM) i5-3230M CPU @ 2.60GHz
Logical processors: 4
Processor groups: 1
RAM: 6001 MB total
_________________________________________________________________________________________________________
CPU SPEED
_________________________________________________________________________________________________________
Reported CPU speed: 2594.0 MHz
Measured CPU speed: 1674.0 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): 6932.421326
Average measured interrupt to process latency (µs): 4.946891
Highest measured interrupt to DPC latency (µs): 6915.447513
Average measured interrupt to DPC latency (µs): 1.279971
_________________________________________________________________________________________________________
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): 76.217810
Driver with highest ISR routine execution time: i8042prt.sys - i8042 Port Driver, Microsoft Corporation
Highest reported total ISR routine time (%): 0.007777
Driver with highest ISR total time: HDAudBus.sys - High Definition Audio Bus Driver, Microsoft Corporation
Total time spent in ISRs (%) 0.011066
ISR count (execution time <250 µs): 74783
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): 500630.494217
Driver with highest DPC routine execution time: DDDriver64Dcsa.sys - DDDriver.sys, Dell Computer Corporation
Highest reported total DPC routine time (%): 0.215580
Driver with highest DPC total execution time: DDDriver64Dcsa.sys - DDDriver.sys, Dell Computer Corporation
Total time spent in DPCs (%) 0.577478
DPC count (execution time <250 µs): 2780523
DPC count (execution time 250-500 µs): 0
DPC count (execution time 500-999 µs): 1639
DPC count (execution time 1000-1999 µs): 10
DPC count (execution time 2000-3999 µs): 44
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: chrome.exe
Total number of hard pagefaults 524
Hard pagefault count of hardest hit process: 109
Highest hard pagefault resolution time (µs): 234236.270625
Total time spent in hard pagefaults (%): 0.193767
Number of processes hit: 17
_________________________________________________________________________________________________________
PER CPU DATA
_________________________________________________________________________________________________________
CPU 0 Interrupt cycle time (s): 21.989843
CPU 0 ISR highest execution time (µs): 60.751735
CPU 0 ISR total execution time (s): 0.112490
CPU 0 ISR count: 22539
CPU 0 DPC highest execution time (µs): 500630.494217
CPU 0 DPC total execution time (s): 13.705367
CPU 0 DPC count: 2359147
_________________________________________________________________________________________________________
CPU 1 Interrupt cycle time (s): 14.812560
CPU 1 ISR highest execution time (µs): 76.217810
CPU 1 ISR total execution time (s): 0.180375
CPU 1 ISR count: 33173
CPU 1 DPC highest execution time (µs): 810.153431
CPU 1 DPC total execution time (s): 3.378667
CPU 1 DPC count: 205025
_________________________________________________________________________________________________________
CPU 2 Interrupt cycle time (s): 8.888057
CPU 2 ISR highest execution time (µs): 61.566692
CPU 2 ISR total execution time (s): 0.040823
CPU 2 ISR count: 8818
CPU 2 DPC highest execution time (µs): 878.627602
CPU 2 DPC total execution time (s): 1.524075
CPU 2 DPC count: 122526
_________________________________________________________________________________________________________
CPU 3 Interrupt cycle time (s): 11.183846
CPU 3 ISR highest execution time (µs): 76.191981
CPU 3 ISR total execution time (s): 0.049312
CPU 3 ISR count: 10253
CPU 3 DPC highest execution time (µs): 769.716268
CPU 3 DPC total execution time (s): 1.379108
CPU 3 DPC count: 95553
_________________________________________________________________________________________________________
I'll try my best to supply any other information that may be needed to help solve this problem.
Any help and advice given is greatly appreciated.
Recently my Dell Inspiron 7720 laptop has been having latency issues. I've had this laptop since early 2013 and have had no such issues until just over a week go. I have been scouring the net for fixes but since it doesn't seem to be the kind of issue that has one fix for all I am now at your mercy
.I followed an online guide to disable CPU throttling and have set my PC settings to performance as opposed to battery saving settings (it's pretty much always plugged in anyway).
I'm running:
i5 2.6Ghz
Windows 8 64 bit
6gb RAM
Intel HD graphics 4000
Nvidia GeForce GT 650M
I've ran latencyMon, here's the report:
_________________________________________________________________________________________________________
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 0:14:25 (h:mm:ss) on all processors.
_________________________________________________________________________________________________________
SYSTEM INFORMATION
_________________________________________________________________________________________________________
Computer name: MARC
OS version: Windows 8 , 6.2, build: 9200 (x64)
Hardware: Inspiron 7720, Dell Inc. , 04M3YM
CPU: GenuineIntel Intel(R) Core(TM) i5-3230M CPU @ 2.60GHz
Logical processors: 4
Processor groups: 1
RAM: 6001 MB total
_________________________________________________________________________________________________________
CPU SPEED
_________________________________________________________________________________________________________
Reported CPU speed: 2594.0 MHz
Measured CPU speed: 1674.0 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): 6932.421326
Average measured interrupt to process latency (µs): 4.946891
Highest measured interrupt to DPC latency (µs): 6915.447513
Average measured interrupt to DPC latency (µs): 1.279971
_________________________________________________________________________________________________________
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): 76.217810
Driver with highest ISR routine execution time: i8042prt.sys - i8042 Port Driver, Microsoft Corporation
Highest reported total ISR routine time (%): 0.007777
Driver with highest ISR total time: HDAudBus.sys - High Definition Audio Bus Driver, Microsoft Corporation
Total time spent in ISRs (%) 0.011066
ISR count (execution time <250 µs): 74783
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): 500630.494217
Driver with highest DPC routine execution time: DDDriver64Dcsa.sys - DDDriver.sys, Dell Computer Corporation
Highest reported total DPC routine time (%): 0.215580
Driver with highest DPC total execution time: DDDriver64Dcsa.sys - DDDriver.sys, Dell Computer Corporation
Total time spent in DPCs (%) 0.577478
DPC count (execution time <250 µs): 2780523
DPC count (execution time 250-500 µs): 0
DPC count (execution time 500-999 µs): 1639
DPC count (execution time 1000-1999 µs): 10
DPC count (execution time 2000-3999 µs): 44
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: chrome.exe
Total number of hard pagefaults 524
Hard pagefault count of hardest hit process: 109
Highest hard pagefault resolution time (µs): 234236.270625
Total time spent in hard pagefaults (%): 0.193767
Number of processes hit: 17
_________________________________________________________________________________________________________
PER CPU DATA
_________________________________________________________________________________________________________
CPU 0 Interrupt cycle time (s): 21.989843
CPU 0 ISR highest execution time (µs): 60.751735
CPU 0 ISR total execution time (s): 0.112490
CPU 0 ISR count: 22539
CPU 0 DPC highest execution time (µs): 500630.494217
CPU 0 DPC total execution time (s): 13.705367
CPU 0 DPC count: 2359147
_________________________________________________________________________________________________________
CPU 1 Interrupt cycle time (s): 14.812560
CPU 1 ISR highest execution time (µs): 76.217810
CPU 1 ISR total execution time (s): 0.180375
CPU 1 ISR count: 33173
CPU 1 DPC highest execution time (µs): 810.153431
CPU 1 DPC total execution time (s): 3.378667
CPU 1 DPC count: 205025
_________________________________________________________________________________________________________
CPU 2 Interrupt cycle time (s): 8.888057
CPU 2 ISR highest execution time (µs): 61.566692
CPU 2 ISR total execution time (s): 0.040823
CPU 2 ISR count: 8818
CPU 2 DPC highest execution time (µs): 878.627602
CPU 2 DPC total execution time (s): 1.524075
CPU 2 DPC count: 122526
_________________________________________________________________________________________________________
CPU 3 Interrupt cycle time (s): 11.183846
CPU 3 ISR highest execution time (µs): 76.191981
CPU 3 ISR total execution time (s): 0.049312
CPU 3 ISR count: 10253
CPU 3 DPC highest execution time (µs): 769.716268
CPU 3 DPC total execution time (s): 1.379108
CPU 3 DPC count: 95553
_________________________________________________________________________________________________________
I'll try my best to supply any other information that may be needed to help solve this problem.
Any help and advice given is greatly appreciated.