Hello everyone,
I learned about this website from Focusrite (audio interface manufacturer). I have a Dell 1545 Inspiron whose BIOS have been updated today. The Windows 7 is setup for high performance in audio (as per Focusrite suggestions). All drivers are up to date but still I am experiencing a lot of latency as well as clicks and pops, which make recording just impossible.
The laptop had wi-fi turned off and there is no anti-virus or anti-malware program installed (and no firewall either). My wife has a MacBook Pro (2011) which I used just to compare, and there is no latency issue with it, so the fault is not on the audio interface or driver.
Any ideas on what can I do to amend this, I would really appreciate.
I run a Latency Monitor Check, which I paste here:
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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 0:02:36 (h:mm:ss) on all processors.
_________________________________________________________________________________________________________
SYSTEM INFORMATION
_________________________________________________________________________________________________________
Computer name: ASINTORAS-PC
OS version: Windows 7 Service Pack 1, 6.1, build: 7601 (x64)
Hardware: Inspiron 1545 , Dell Inc., 0G848F
CPU: GenuineIntel Pentium(R) Dual-Core CPU T4400 @ 2.20GHz
Logical processors: 2
Processor groups: 1
RAM: 4056 MB total
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CPU SPEED
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Reported CPU speed: 2194 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
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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): 21511.853613
Average measured interrupt to process latency (µs): 12.350102
Highest measured interrupt to DPC latency (µs): 442.340785
Average measured interrupt to DPC latency (µs): 2.805915
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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): 200.005469
Driver with highest ISR routine execution time: USBPORT.SYS - USB 1.1 & 2.0 Port Driver, Microsoft Corporation
Highest reported total ISR routine time (%): 0.201432
Driver with highest ISR total time: USBPORT.SYS - USB 1.1 & 2.0 Port Driver, Microsoft Corporation
Total time spent in ISRs (%) 0.326558
ISR count (execution time <250 µs): 320036
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): 3494.931632
Driver with highest DPC routine execution time: USBPORT.SYS - USB 1.1 & 2.0 Port Driver, Microsoft Corporation
Highest reported total DPC routine time (%): 6.101485
Driver with highest DPC total execution time: USBPORT.SYS - USB 1.1 & 2.0 Port Driver, Microsoft Corporation
Total time spent in DPCs (%) 6.903414
DPC count (execution time <250 µs): 941194
DPC count (execution time 250-500 µs): 0
DPC count (execution time 500-999 µs): 20005
DPC count (execution time 1000-1999 µs): 4
DPC count (execution time 2000-3999 µs): 9
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 848
Hard pagefault count of hardest hit process: 624
Highest hard pagefault resolution time (µs): 354295.759799
Total time spent in hard pagefaults (%): 5.997567
Number of processes hit: 8
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PER CPU DATA
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CPU 0 Interrupt cycle time (s): 13.915864
CPU 0 ISR highest execution time (µs): 39.397448
CPU 0 ISR total execution time (s): 0.635322
CPU 0 ISR count: 237664
CPU 0 DPC highest execution time (µs): 2439.643573
CPU 0 DPC total execution time (s): 11.725608
CPU 0 DPC count: 818199
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CPU 1 Interrupt cycle time (s): 11.604927
CPU 1 ISR highest execution time (µs): 200.005469
CPU 1 ISR total execution time (s): 0.385382
CPU 1 ISR count: 82372
CPU 1 DPC highest execution time (µs): 3494.931632
CPU 1 DPC total execution time (s): 9.851978
CPU 1 DPC count: 143013
_________________________________________________________________________________________________________
I learned about this website from Focusrite (audio interface manufacturer). I have a Dell 1545 Inspiron whose BIOS have been updated today. The Windows 7 is setup for high performance in audio (as per Focusrite suggestions). All drivers are up to date but still I am experiencing a lot of latency as well as clicks and pops, which make recording just impossible.
The laptop had wi-fi turned off and there is no anti-virus or anti-malware program installed (and no firewall either). My wife has a MacBook Pro (2011) which I used just to compare, and there is no latency issue with it, so the fault is not on the audio interface or driver.
Any ideas on what can I do to amend this, I would really appreciate.
I run a Latency Monitor Check, which I paste 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. 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 0:02:36 (h:mm:ss) on all processors.
_________________________________________________________________________________________________________
SYSTEM INFORMATION
_________________________________________________________________________________________________________
Computer name: ASINTORAS-PC
OS version: Windows 7 Service Pack 1, 6.1, build: 7601 (x64)
Hardware: Inspiron 1545 , Dell Inc., 0G848F
CPU: GenuineIntel Pentium(R) Dual-Core CPU T4400 @ 2.20GHz
Logical processors: 2
Processor groups: 1
RAM: 4056 MB total
_________________________________________________________________________________________________________
CPU SPEED
_________________________________________________________________________________________________________
Reported CPU speed: 2194 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): 21511.853613
Average measured interrupt to process latency (µs): 12.350102
Highest measured interrupt to DPC latency (µs): 442.340785
Average measured interrupt to DPC latency (µs): 2.805915
_________________________________________________________________________________________________________
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): 200.005469
Driver with highest ISR routine execution time: USBPORT.SYS - USB 1.1 & 2.0 Port Driver, Microsoft Corporation
Highest reported total ISR routine time (%): 0.201432
Driver with highest ISR total time: USBPORT.SYS - USB 1.1 & 2.0 Port Driver, Microsoft Corporation
Total time spent in ISRs (%) 0.326558
ISR count (execution time <250 µs): 320036
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): 3494.931632
Driver with highest DPC routine execution time: USBPORT.SYS - USB 1.1 & 2.0 Port Driver, Microsoft Corporation
Highest reported total DPC routine time (%): 6.101485
Driver with highest DPC total execution time: USBPORT.SYS - USB 1.1 & 2.0 Port Driver, Microsoft Corporation
Total time spent in DPCs (%) 6.903414
DPC count (execution time <250 µs): 941194
DPC count (execution time 250-500 µs): 0
DPC count (execution time 500-999 µs): 20005
DPC count (execution time 1000-1999 µs): 4
DPC count (execution time 2000-3999 µs): 9
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 848
Hard pagefault count of hardest hit process: 624
Highest hard pagefault resolution time (µs): 354295.759799
Total time spent in hard pagefaults (%): 5.997567
Number of processes hit: 8
_________________________________________________________________________________________________________
PER CPU DATA
_________________________________________________________________________________________________________
CPU 0 Interrupt cycle time (s): 13.915864
CPU 0 ISR highest execution time (µs): 39.397448
CPU 0 ISR total execution time (s): 0.635322
CPU 0 ISR count: 237664
CPU 0 DPC highest execution time (µs): 2439.643573
CPU 0 DPC total execution time (s): 11.725608
CPU 0 DPC count: 818199
_________________________________________________________________________________________________________
CPU 1 Interrupt cycle time (s): 11.604927
CPU 1 ISR highest execution time (µs): 200.005469
CPU 1 ISR total execution time (s): 0.385382
CPU 1 ISR count: 82372
CPU 1 DPC highest execution time (µs): 3494.931632
CPU 1 DPC total execution time (s): 9.851978
CPU 1 DPC count: 143013
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