undefined | Better HN

0 pointsmgaunard2y ago0 comments

You write the UDP payload onto PCI-Express, then the NIC writes it onto the wire as an Ethernet frame.

Obviously you're limited by PCI-Express bandwidth then Ethernet bandwidth. There is also a bit of jitter tied to the underlying protocols but those delays aren't really significant for most applications.

Meanwhile, TCP can queue data indefinitely, based on how the other end is sending acks and the size of the window.

0 comments

swaits2y ago

And what about all the switches, routers, bridges, firewalls, and whatever else in between endpoints?

What a strange thing to require. It comes off a bit like X-Y. You seek high performance. But you state it as wanting zero copy networking. There’s a lot more to performance across the overall system than that.

mgaunardOP2y ago

Wanting no blocking has nothing to do with that.

mratsim2y ago

You said you wanted no queue.

j / k navigate · click thread line to collapse