Hey guys,
I've got a few DPC latency issues that I'm not quite sure how to resolve!
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CONCLUSION
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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 0:10:17 (h:mm:ss) on all processors.
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SYSTEM INFORMATION
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Computer name: ALEX-PC
OS version: Windows 7 Service Pack 1, 6.1, build: 7601 (x64)
Hardware: ASUSTeK COMPUTER INC., P8P67 PRO
CPU: GenuineIntel Intel(R) Core(TM) i7-2600K CPU @ 3.40GHz
Logical processors: 8
Processor groups: 1
RAM: 16360 MB total
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CPU SPEED
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Reported CPU speed: 3411 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.
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.
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MEASURED INTERRUPT TO USER PROCESS LATENCIES
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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): 32209.520836
Average measured interrupt to process latency (µs): 26.085980
Highest measured interrupt to DPC latency (µs): 1710.484447
Average measured interrupt to DPC latency (µs): 1.305832
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REPORTED ISRs
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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): 851.291996
Driver with highest ISR routine execution time: dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation
Highest reported total ISR routine time (%): 0.061027
Driver with highest ISR total time: hal.dll - Hardware Abstraction Layer DLL, Microsoft Corporation
Total time spent in ISRs (%) 0.169229
ISR count (execution time <250 µs): 1055211
ISR count (execution time 250-500 µs): 0
ISR count (execution time 500-999 µs): 2
ISR count (execution time 1000-1999 µs): 0
ISR count (execution time 2000-3999 µs): 0
ISR count (execution time >=4000 µs): 0
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REPORTED DPCs
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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): 1409.112284
Driver with highest DPC routine execution time: ataport.SYS - ATAPI Driver Extension, Microsoft Corporation
Highest reported total DPC routine time (%): 0.082948
Driver with highest DPC total execution time: ataport.SYS - ATAPI Driver Extension, Microsoft Corporation
Total time spent in DPCs (%) 0.297720
DPC count (execution time <250 µs): 2067077
DPC count (execution time 250-500 µs): 0
DPC count (execution time 500-999 µs): 66
DPC count (execution time 1000-1999 µs): 2
DPC count (execution time 2000-3999 µs): 0
DPC count (execution time >=4000 µs): 0
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REPORTED HARD PAGEFAULTS
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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: trustedinstaller.exe
Total number of hard pagefaults 19390
Hard pagefault count of hardest hit process: 9571
Number of processes hit: 30
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PER CPU DATA
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CPU 0 Interrupt cycle time (s): 36.919088
CPU 0 ISR highest execution time (µs): 851.291996
CPU 0 ISR total execution time (s): 8.358638
CPU 0 ISR count: 1055213
CPU 0 DPC highest execution time (µs): 1409.112284
CPU 0 DPC total execution time (s): 14.091977
CPU 0 DPC count: 1856657
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CPU 1 Interrupt cycle time (s): 11.877319
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): 72.559074
CPU 1 DPC total execution time (s): 0.067664
CPU 1 DPC count: 29596
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CPU 2 Interrupt cycle time (s): 12.420285
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): 59.068602
CPU 2 DPC total execution time (s): 0.123534
CPU 2 DPC count: 44275
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CPU 3 Interrupt cycle time (s): 11.700590
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): 58.318089
CPU 3 DPC total execution time (s): 0.043831
CPU 3 DPC count: 15414
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CPU 4 Interrupt cycle time (s): 10.991720
CPU 4 ISR highest execution time (µs): 0.0
CPU 4 ISR total execution time (s): 0.0
CPU 4 ISR count: 0
CPU 4 DPC highest execution time (µs): 55.669598
CPU 4 DPC total execution time (s): 0.111466
CPU 4 DPC count: 43659
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CPU 5 Interrupt cycle time (s): 11.407221
CPU 5 ISR highest execution time (µs): 0.0
CPU 5 ISR total execution time (s): 0.0
CPU 5 ISR count: 0
CPU 5 DPC highest execution time (µs): 113.667839
CPU 5 DPC total execution time (s): 0.025139
CPU 5 DPC count: 9271
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CPU 6 Interrupt cycle time (s): 11.121961
CPU 6 ISR highest execution time (µs): 0.0
CPU 6 ISR total execution time (s): 0.0
CPU 6 ISR count: 0
CPU 6 DPC highest execution time (µs): 64.670771
CPU 6 DPC total execution time (s): 0.219328
CPU 6 DPC count: 62606
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CPU 7 Interrupt cycle time (s): 11.401734
CPU 7 ISR highest execution time (µs): 0.0
CPU 7 ISR total execution time (s): 0.0
CPU 7 ISR count: 0
CPU 7 DPC highest execution time (µs): 99.563178
CPU 7 DPC total execution time (s): 0.022192
CPU 7 DPC count: 5667
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I've installed the latest Nvidia driver and NIC driver as well
Any thoughts?
Thanks!
I've got a few DPC latency issues that I'm not quite sure how to resolve!
_________________________________________________________________________________________________________
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 0:10:17 (h:mm:ss) on all processors.
_________________________________________________________________________________________________________
SYSTEM INFORMATION
_________________________________________________________________________________________________________
Computer name: ALEX-PC
OS version: Windows 7 Service Pack 1, 6.1, build: 7601 (x64)
Hardware: ASUSTeK COMPUTER INC., P8P67 PRO
CPU: GenuineIntel Intel(R) Core(TM) i7-2600K CPU @ 3.40GHz
Logical processors: 8
Processor groups: 1
RAM: 16360 MB total
_________________________________________________________________________________________________________
CPU SPEED
_________________________________________________________________________________________________________
Reported CPU speed: 3411 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.
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): 32209.520836
Average measured interrupt to process latency (µs): 26.085980
Highest measured interrupt to DPC latency (µs): 1710.484447
Average measured interrupt to DPC latency (µs): 1.305832
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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): 851.291996
Driver with highest ISR routine execution time: dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation
Highest reported total ISR routine time (%): 0.061027
Driver with highest ISR total time: hal.dll - Hardware Abstraction Layer DLL, Microsoft Corporation
Total time spent in ISRs (%) 0.169229
ISR count (execution time <250 µs): 1055211
ISR count (execution time 250-500 µs): 0
ISR count (execution time 500-999 µs): 2
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): 1409.112284
Driver with highest DPC routine execution time: ataport.SYS - ATAPI Driver Extension, Microsoft Corporation
Highest reported total DPC routine time (%): 0.082948
Driver with highest DPC total execution time: ataport.SYS - ATAPI Driver Extension, Microsoft Corporation
Total time spent in DPCs (%) 0.297720
DPC count (execution time <250 µs): 2067077
DPC count (execution time 250-500 µs): 0
DPC count (execution time 500-999 µs): 66
DPC count (execution time 1000-1999 µs): 2
DPC count (execution time 2000-3999 µs): 0
DPC count (execution time >=4000 µs): 0
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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: trustedinstaller.exe
Total number of hard pagefaults 19390
Hard pagefault count of hardest hit process: 9571
Number of processes hit: 30
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PER CPU DATA
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CPU 0 Interrupt cycle time (s): 36.919088
CPU 0 ISR highest execution time (µs): 851.291996
CPU 0 ISR total execution time (s): 8.358638
CPU 0 ISR count: 1055213
CPU 0 DPC highest execution time (µs): 1409.112284
CPU 0 DPC total execution time (s): 14.091977
CPU 0 DPC count: 1856657
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CPU 1 Interrupt cycle time (s): 11.877319
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): 72.559074
CPU 1 DPC total execution time (s): 0.067664
CPU 1 DPC count: 29596
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CPU 2 Interrupt cycle time (s): 12.420285
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): 59.068602
CPU 2 DPC total execution time (s): 0.123534
CPU 2 DPC count: 44275
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CPU 3 Interrupt cycle time (s): 11.700590
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): 58.318089
CPU 3 DPC total execution time (s): 0.043831
CPU 3 DPC count: 15414
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CPU 4 Interrupt cycle time (s): 10.991720
CPU 4 ISR highest execution time (µs): 0.0
CPU 4 ISR total execution time (s): 0.0
CPU 4 ISR count: 0
CPU 4 DPC highest execution time (µs): 55.669598
CPU 4 DPC total execution time (s): 0.111466
CPU 4 DPC count: 43659
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CPU 5 Interrupt cycle time (s): 11.407221
CPU 5 ISR highest execution time (µs): 0.0
CPU 5 ISR total execution time (s): 0.0
CPU 5 ISR count: 0
CPU 5 DPC highest execution time (µs): 113.667839
CPU 5 DPC total execution time (s): 0.025139
CPU 5 DPC count: 9271
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CPU 6 Interrupt cycle time (s): 11.121961
CPU 6 ISR highest execution time (µs): 0.0
CPU 6 ISR total execution time (s): 0.0
CPU 6 ISR count: 0
CPU 6 DPC highest execution time (µs): 64.670771
CPU 6 DPC total execution time (s): 0.219328
CPU 6 DPC count: 62606
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CPU 7 Interrupt cycle time (s): 11.401734
CPU 7 ISR highest execution time (µs): 0.0
CPU 7 ISR total execution time (s): 0.0
CPU 7 ISR count: 0
CPU 7 DPC highest execution time (µs): 99.563178
CPU 7 DPC total execution time (s): 0.022192
CPU 7 DPC count: 5667
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I've installed the latest Nvidia driver and NIC driver as well
Any thoughts?
Thanks!
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