From: Dexuan Cui <decui@xxxxxxxxxxxxx> Date: Mon, 9 Nov 2015 02:39:24 +0000 >> Throughput on a single TCP flow for a 40G NIC can be tricky to tune. > Why is a single TCP flow trickier than multiple TCP flows? > IMO it should be easier to analyze the issue of a single TCP flow? Because a single TCP flow can only use one of the many TX queues that such modern NICs have. The single TX queue becomes the bottleneck. Whereas if you have several TCP flows, all of them can use independant TX queues on the NIC in parallel to fill the link with traffic. That's why. _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
