Is the XP VMM a bottleneck on a multi core machine?

Posted by JeffV on Super User See other posts from Super User or by JeffV
Published on 2011-08-03T14:11:10Z Indexed on 2012/10/02 15:42 UTC
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windows-xp

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Performance

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cpu

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io

I have a dual Xeon hex core machine running an IO intensive application. (WinXP 32) I am seeing a hardware driver (1/2 user mode, 1/2 kernel, streaming data) that is using 6k delta page faults per second. When other applications load or allocate large amounts of memory the driver's hardware buffer gets an underrun (application not feeding it fast enough).

Could this be because the kernel is only using one core to service page fault interrupts?

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