RE: Debugging Network Performance

    "It would be interesting to see where the cpu is being used. Could you
    boot with profile=2 and use readprofile to find the worst cpu hogs
    during a run?"

Where can I find documentation on the profile=## option? Are there also
tools that will help to interpret the logs?

The problem with the poor SUNGEM performance turned out to be lots of
extraneous unnecessary interrupts, so you might want to check out the
eth0 interrupts in /proc/interrupts, comparing the two cases.

I will check the interrupts. There are several errata regarding the FCC
interface. I know that the code considered these cases but I need to make
sure that it did not get removed mistakenly.


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