• AVincentInSpace
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    1 year ago

    I’m curious how close your total throughput would be to the theoretical 10Gb/s, assuming it was used with a switch that could keep up. Protocol overhead with Ethernet/TCP/IP is bad enough without NIC teaming to say nothing of the total throughput of the Thunderbolt transceiver

    • SteveTech@programming.dev
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      1 year ago

      I don’t know if I’ll remember, but I’ll be able to try this in a few days, I have the same laptop, 2x 2.5G USB NICs + another 2 already in the mail, and also a 10G network.

      If you’re wondering, my intention for ordering them definitely wasn’t for this, but more just for places around the house I can plug into, without having the framework NIC hanging off my laptop.

        • SteveTech@programming.dev
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          1 year ago

          Alright, so testing with iperf3 to a 10G host:

          • Single Direction - 7.06 Gbps RX (2.35, 2.35, 1.25, 1.11 Gbps individually), 9.4 Gbps TX (All 2.35 Gbps)
          • Bidirectionally - 8 Gbps Total, 1.538 Gbps RX & 6.55 Gbps TX (315/1220, 232/2080, 256/1520, 735/1730 Mbps individually)

          4x USB NICs on the laptop, 1x Solarflare SFN5122F NIC on the desktop, there were 2 10G switches in between which may have affected the speeds slightly.

          Also I can get 4.6 Gbps total (2.3/2.3) bidirectionally on one interface, so I would have expected ~16 Gbps with 4, so that’s interesting I guess? My desktop can do 18.6 Gbps total (9.55/9.11) to my server so idk.

          Edit: I was using 1500 MTU, I don’t feel like testing again with jumbo frames.

          • AVincentInSpace
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            1 year ago

            Fascinating, especially that the RX direction saw such varied speeds across the various NICs. Guess that switch wasn’t too keen on trying to split the packets evenly. Also – 1.5Gbit RX in bidirectional mode? …all I can say is yikes.

            Very good to know.

            @slice@feddit.de – you were interested in this too

            • SteveTech@programming.dev
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              1 year ago

              Guess that switch wasn’t too keen on trying to split the packets evenly.

              Yeah probably, I was just using one of those cheap 2x 10G + 4x 2.5G switches that ServeTheHome recently did a video on, so I would not be surprised if that was the bottle neck here.

              I could maybe try buying a few more SFP+ transceivers and using my more trustworthy switches, but that seems too expensive for a project like this.