Eu usei o seguinte comando xperf para obter uma visão geral da atividade do DPC em seu sistema:
"C:\Program Files (x86)\Windows Kits\Windows Performance Toolkit\xperf.exe" -I DIOMBPWS03-07-2016.23-45-01.etl -a dpcisr > dpc.txt
No DPC.txt eu vejo que você tem alguns grandes picos (mais de 1024µs de tempo de execução), que causam essas falhas de áudio:
Total = 7394 for module USBXHCI.SYS
Elapsed Time, > 2048 usecs AND <= 4096 usecs, 0, or 0.00%
Elapsed Time, > 4096 usecs AND <= 8192 usecs, 1, or 0.01%
Elapsed Time, > 8192 usecs AND <= 16384 usecs, 2, or 0.03%
Elapsed Time, > 16384 usecs AND <= 32768 usecs, 0, or 0.00%
Elapsed Time, > 32768 usecs AND <= 65536 usecs, 1, or 0.01%
Total, 7394
Total = 10028 for module afd.sys
Elapsed Time, > 1024 usecs AND <= 2048 usecs, 0, or 0.00%
Elapsed Time, > 2048 usecs AND <= 4096 usecs, 0, or 0.00%
Elapsed Time, > 4096 usecs AND <= 8192 usecs, 4, or 0.04%
Total, 10028
Total = 7092 for module ndis.sys
Elapsed Time, > 512 usecs AND <= 1024 usecs, 1, or 0.01%
Elapsed Time, > 1024 usecs AND <= 2048 usecs, 0, or 0.00%
Elapsed Time, > 2048 usecs AND <= 4096 usecs, 1, or 0.01%
Elapsed Time, > 4096 usecs AND <= 8192 usecs, 1, or 0.01%
Total, 7092
Total = 28123 for module ntoskrnl.exe
Elapsed Time, > 1024 usecs AND <= 2048 usecs, 0, or 0.00%
Elapsed Time, > 2048 usecs AND <= 4096 usecs, 1, or 0.00%
Elapsed Time, > 4096 usecs AND <= 8192 usecs, 6, or 0.02%
Total, 28123
Total = 36449 for module storport.sys
Elapsed Time, > 1024 usecs AND <= 2048 usecs, 0, or 0.00%
Elapsed Time, > 2048 usecs AND <= 4096 usecs, 0, or 0.00%
Elapsed Time, > 4096 usecs AND <= 8192 usecs, 4, or 0.01%
Total, 36449
Total = 29689 for module nvlddmkm.sys
Elapsed Time, > 1024 usecs AND <= 2048 usecs, 1, or 0.00%
Elapsed Time, > 2048 usecs AND <= 4096 usecs, 3, or 0.01%
Elapsed Time, > 4096 usecs AND <= 8192 usecs, 1, or 0.00%
Total, 29689
Os maiores problemas vêm do driver USB 3.0 ( USBXHCI.SYS
) do Windows 8.1, que tem um pico de 0,032768s, o que é terrível.
Eu olhei para o callstack e vi que o driver USB faz alguma transferência de IO ( USBXHCI.SYS!UsbDevice_TransferEventHandler
). Portanto, desative alguns dos dispositivos USB que você usa até encontrar o dispositivo que causa o uso.