> We offload TLS to the NIC, NOT TCP.
How is this possible? If TCP is done on the host and TLS on the NIC data will need to pass through the CPU right? But the slides show cpu fully bypassed for data
How is this possible? If TCP is done on the host and TLS on the NIC data will need to pass through the CPU right? But the slides show cpu fully bypassed for data
Modern NICs use packet descriptors that allow you to more or less say take N bytes from this address, then M bytes from some other address, etc to form the packet. So the kernel is going to make the tcp/ip header, and then tell the nic to send that with the next bytes of data (and mark it for TLS however that's done).