Uh… no. PCI-E bus is about 900ns on each end, switch adds 300ns. You can get under 3us ping pong, you’re off by orders of magnitude. Your sense is probably com

Uh… no. PCI-E bus is about 900ns on each end, switch adds 300ns. You can get under 3us ping pong, you’re off by orders of magnitude. Your sense is probably coming from bad OS stacks. Kernel bypass like Amazon uses achieves this easily.