Quote
DPC Info
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CPU Usage Summing By Module For the Whole Trace
CPU Usage from 0 us to 58737359 us:
CPU 0 Usage, CPU 1 Usage, CPU 2 Usage, CPU 3 Usage,
usec %, usec %, usec %, usec %, Module
1725611 2.94, 0 0.00, 213637 0.36, 0 0.00, ataport.SYS
Total = 1782 for module USBPORT.SYS
Elapsed Time, > 512 usecs AND <= 1024 usecs, 34, or 1.91%
Elapsed Time, > 1024 usecs AND <= 2048 usecs, 53, or 2.97%
Elapsed Time, > 2048 usecs AND <= 4096 usecs, 1, or 0.06%
Total = 5002 for module ataport.SYS
Elapsed Time, > 512 usecs AND <= 1024 usecs, 639, or 12.77%
Elapsed Time, > 1024 usecs AND <= 2048 usecs, 19, or 0.38%
Elapsed Time, > 2048 usecs AND <= 4096 usecs, 129, or 2.58%
Total = 24 for module netbt.sys
Elapsed Time, > 1024 usecs AND <= 2048 usecs, 0, or 0.00%
Elapsed Time, > 2048 usecs AND <= 4096 usecs, 20, or 83.33%
Elapsed Time, > 4096 usecs AND <= 8192 usecs, 4, or 16.67%
USBport i still an issue, but 2 others also have huge impact. The ataport.sys causes some spikes. I can see that the Diskeeper service causes an extreme CPU usage. Your HDDs seem to run in IDE mode and this seems to cause the ataport DPC issues.
Device Id, Device Description, Device Friendly Name
Quote
IDE\CDROMATAPI_IHAS324___B_______________________AL1B____\5&5C4DDEF&0&1.0.0, CD-ROM Drive, ATAPI iHAS324 B ATA Device
IDE\CDROMPIONEER_DVD-RW__DVR-215D________________1.13____\5&5C4DDEF&0&1.1.0, CD-ROM Drive, PIONEER DVD-RW DVR-215D ATA Device
IDE\DISKSAMSUNG_HD753LJ_________________________1AA01107\5&CF4D2B6&0&0.0.0, Disk drive, SAMSUNG HD753LJ ATA Device
IDE\DISKWDC_WD7501AALS-00J7B0___________________05.00K05\5&2F484CA3&0&1.0.0, Disk drive, WDC WD7501AALS-00J7B0 ATA Device
So stop Diskeeper and only use the Windows internal defrag tool which only runs if the PC is idle.
Now the interesting part is netbt.sys. This is
NetBIOS over TCP/IP. it ha only 24 DPCs but all of them are horrible slow (at least 2000µs).
Try to find out which service program depends on NetBIOS. Maybe it is Diskeeper which communicates this way.