Hardware interrupts exceeds system calls

Posted on 2012-09-17
Last Modified: 2012-09-19
Foglight reported this warning ---

The number of hardware interrupts per second (1115.00) is more than the number of System Calls per second (1095.00).This indicates a hardware device is generating an excessive amount of hardware interrupts.

How do identify the hardware that is causing this warning?
Question by:bjbrown
    1 Comment
    LVL 18

    Accepted Solution

    Using Kernrate old tool from Microsoft should allow you to identify whose drivers are processing all those IRQ.
    ==> Knowing the drivers should allow you to identify which add-on card is launching such an IRQ volume.

    A way to get ride of this problem may be to define a CPU affinity to force IRQ from this driver to be processed on a single core. This may avoid loosing a lot of CPU time in context switching and memory access.

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