Very high page fault rate in vmmon

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  • July 13, 2012 at 19:13 #420
    emusic
    Participant

    Hello!

    Using VirtualKD 2.5-2.7, I noticed that vmmon (both 32- and 64-bit) generates many (hundreds/thousands) page faults per second even if no debug messages are transmitted, debugger is not active and guest system is idle.

    On the desktop with Q9550 and XP, 32-bit vmmon generates about 1000 PFs per second. On the notebook with T8300 and XP, 32-bit vmmon generates 300-500 PFs per second. On the notebook with i3 M380 and Win7 x64, 64-bit vmmon generates about 4000 PFs per second.

    Is it normal? What may cause such extremely high PF rate?

    November 24, 2012 at 03:48 #2062
    emusic
    Participant

    These PF’s are not paging ones (pagefile size is fixed to be 16 Megabytes, just to create crash minidumps). There always are 1-3 Gigabytes free but VMMon always produces hundreds or thousands PF’s per second.

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