merci pour les pistes. je pense vraiment à un problème de pilote, car j'ai l'impression que c'est depuis la ré installation de windows....
petit info cette nuit l'ordi est resté en veille. ce matin plus d'interruption système.... je sui allé sur le net, je suis allé ds le disque dure, et rien pas d'interruption système... j'ai re démarré... et de nouveau le processeur sollicité !!
voilà ce qui est ecrit sur l rapport:
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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. 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 1:43:37 (h:mm:ss) on all processors.
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SYSTEM INFORMATION
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Computer name: ERIC-PC
OS version: Windows 10 , 10.0, build: 17134 (x86)
Hardware: M50Vn , ASUSTeK Computer Inc. , M50Vn
CPU: GenuineIntel Intel(R) Core(TM)2 Duo CPU T5850 @ 2.16GHz
Logical processors: 2
Processor groups: 1
RAM: 3071 MB total
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CPU SPEED
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Reported CPU speed: 2161 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.
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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): 16799,142704
Average measured interrupt to process latency (µs): 115,111736
Highest measured interrupt to DPC latency (µs): 9232,8960
Average measured interrupt to DPC latency (µs): 86,099990
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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): 805478,447941
Driver with highest ISR routine execution time: HDAudBus.sys - High Definition Audio Bus Driver, Microsoft Corporation
Highest reported total ISR routine time (%): 39,021666
Driver with highest ISR total time: dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation
Total time spent in ISRs (%) 43,572896
ISR count (execution time <250 µs): 563259032
ISR count (execution time 250-500 µs): 0
ISR count (execution time 500-999 µs): 520
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): 22068,447478
Driver with highest DPC routine execution time: nvlddmkm.sys - NVIDIA Windows Kernel Mode Driver, Version 342.01 , NVIDIA Corporation
Highest reported total DPC routine time (%): 37,056730
Driver with highest DPC total execution time: dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation
Total time spent in DPCs (%) 4,032644
DPC count (execution time <250 µs): 17485350
DPC count (execution time 250-500 µs): 0
DPC count (execution time 500-999 µs): 274640
DPC count (execution time 1000-1999 µs): 13817
DPC count (execution time 2000-3999 µs): 296
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: msmpeng.exe
Total number of hard pagefaults 8941
Hard pagefault count of hardest hit process: 3228
Number of processes hit: 46
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PER CPU DATA
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CPU 0 Interrupt cycle time (s): 5679,151923
CPU 0 ISR highest execution time (µs): 805478,447941
CPU 0 ISR total execution time (s): 5412,806058
CPU 0 ISR count: 563045822
CPU 0 DPC highest execution time (µs): 22068,447478
CPU 0 DPC total execution time (s): 496,501270
CPU 0 DPC count: 17512894
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CPU 1 Interrupt cycle time (s): 84,124836
CPU 1 ISR highest execution time (µs): 183,473855
CPU 1 ISR total execution time (s): 5,892239
CPU 1 ISR count: 213733
CPU 1 DPC highest execution time (µs): 819,739935
CPU 1 DPC total execution time (s): 4,995788
CPU 1 DPC count: 261247
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