How many megabytes per second may I expect from a gigabit USB 2.0 network card under linux?

Posted by Nakedible on Super User See other posts from Super User or by Nakedible
Published on 2010-04-02T09:55:15Z Indexed on 2010/04/02 10:03 UTC
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linux

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networking

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usb

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Performance

I'm interested in the actual real-word throughput attainable with an external 1000BaseT USB 2.0 network card under Linux. I have been able to attain 90 megabytes per second on a PCI-E interface, but the USB 2.0 bus has a theoretical limit of 480Mbit/s, and in practice less than 40 megabytes per second.

Is the actual throughput attainable with such a card under linux 40, 30, 20, or even as low as 10 megabytes per second, eg. no better than a normal 100BaseT network card?

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