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Tue Dec 2 03:01:20 GMT 2003

has receive checksumming support on the adapter itself while the latter,
the one you are using, does not support hardware checksumming (at least, it
is not enabled by the driver).

Are you able to re-run your tests with GigE adapters that support
checksumming on the hardware instead of doing it in the kernel?  If not, I
will be running similar tests in a very similar configuration (with the
19K4401 adapters) in the near future and can share results if you'd like.

Bruce Allan/Beaverton/IBM
IBM Linux Technology Center - OS Gold
503-578-4187   T/L 775-4187
bruce.allan at

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