Audio interupts/ISR/Dpc interupts and hard pagefaults
I seem to be getting stutters/freeesin my audio (and my computer in general). This problem is system wide and it started after i upgraded to windows 8.1 pro from windows 7. I did some looking around which lead me to this program LatencyMon which could help
identify the problem. seems like svchost.exe might be the main source of the problem but i dont know how to fix it.
I updated my network drivers already to the latest version but the problem persists. Below is the results posted.
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. Also one or more ISR 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 0:28:11 (h:mm:ss) on all processors.
SYSTEM INFORMATION
Computer name: CLINTONS-PC
OS version:
Windows 8 , 6.2, build: 9200 (x64)
Hardware:
Dell System XPS 15Z, Dell Inc. , Dell Inc., 0XK6HV
CPU:
GenuineIntel Intel(R) Core(TM) i5-2410M CPU @ 2.30GHz
Logical processors: 4
Processor groups: 1
RAM:
6038 MB total
CPU SPEED
Reported CPU speed: 2295.0 MHz
Measured CPU speed: 323.0 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.
WARNING: the CPU speed that was measured is only a fraction of the CPU speed reported. Your CPUs may be throttled back due to variable speed settings and thermal issues. It is suggested that you run a utility which reports your actual CPU frequency and temperature.
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): 117398.876663
Average measured interrupt to process latency (µs): 27.809204
Highest measured interrupt to DPC latency (µs): 76015.137878
Average measured interrupt to DPC latency (µs): 7.914336
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): 1753.141612
Driver with highest ISR routine execution time: iaStor.sys - Intel Rapid Storage Technology driver - x64, Intel Corporation
Highest reported total ISR routine time (%): 0.052493
Driver with highest ISR total time: HDAudBus.sys - High Definition Audio Bus Driver, Microsoft Corporation
Total time spent in ISRs (%) 0.076265
ISR count (execution time <250 µs): 297917
ISR count (execution time 250-500 µs): 0
ISR count (execution time 500-999 µs): 2546
ISR count (execution time 1000-1999 µs): 9
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): 35307.542484
Driver with highest DPC routine execution time: ndis.sys - Network Driver Interface Specification (NDIS), Microsoft Corporation
Highest reported total DPC routine time (%): 0.169577
Driver with highest DPC total execution time: ndis.sys - Network Driver Interface Specification (NDIS), Microsoft Corporation
Total time spent in DPCs (%) 0.692319
DPC count (execution time <250 µs): 5181337
DPC count (execution time 250-500 µs): 0
DPC count (execution time 500-999 µs): 17222
DPC count (execution time 1000-1999 µs): 3566
DPC count (execution time 2000-3999 µs): 1097
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: svchost.exe
Total number of hard pagefaults 23290
Hard pagefault count of hardest hit process: 4926
Highest hard pagefault resolution time (µs): 4855456.366885
Total time spent in hard pagefaults (%): 16.745623
Number of processes hit: 36
PER CPU DATA
CPU 0 Interrupt cycle time (s): 112.018745
CPU 0 ISR highest execution time (µs): 1753.141612
CPU 0 ISR total execution time (s): 5.158930
CPU 0 ISR count: 300472
CPU 0 DPC highest execution time (µs): 35307.542484
CPU 0 DPC total execution time (s): 44.721783
CPU 0 DPC count: 5081033
CPU 1 Interrupt cycle time (s): 17.847723
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): 2732.360349
CPU 1 DPC total execution time (s): 0.495028
CPU 1 DPC count: 32823
CPU 2 Interrupt cycle time (s): 12.275821
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): 4835.378649
CPU 2 DPC total execution time (s): 0.725214
CPU 2 DPC count: 38391
CPU 3 Interrupt cycle time (s): 18.133673
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): 2950.756863
CPU 3 DPC total execution time (s): 0.88950
CPU 3 DPC count: 51321
.etl file dropbox.com/s/n7isxllmwpoanno/highCPUUsage.etl
Hi,
Generally speaking, this problem probably caused by Audio Driver Problem, please try to reinstall Audio driver for test.
Roger Lu
TechNet Community Support
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MSI-K7N2 Delta2-LSR
Athlon XP 2200+
1 x Corsair 256Mb PC-3200 memory bank
1 Sata Harddisk (120Gb Western Digital)
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1 CD-ROM (Creative) - Slave Secundary IDE
Computer 2:
MSI-K7N2 Delta-L
Semptron 2200+
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1 x Western Digital 20Gb IDE hard disk (Master Primary)
1 x Seagate 20Gb IDE hard disk (Slave Primary)
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PD: Sorry my english.. :P
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[email protected]Hi Chefjeegar
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Deleting a song from iTunes library and hard drive on Itunes 11.0
how do i delete a song from iTunes library and hard drive on Itunes 11.0 at the same time.
Hello CleveCo, Inc
And welcome to Apple Discussions!
At some point in time, you may have selected the option to prevent that dialog from appearing again when trying to delete tracks from your library. To reset all of iTunes warning dialogs, click the Edit drop down menu and choose Preferences from the list (on a Mac it is *iTunes -> Preferences* ). When the window pops up, head over to the Advanced tab and click the *Reset Warnings* button. Then quit iTunes and relaunch it. That do the trick for you?
B-rock
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