Liang Mury's questions

I know loopback will go through the kernel network stack until reach IP layer, including syscall overhead and some memory copy overhead. DPDK and RDMA use different technology to avoid these.
So let's say I have two machine connected by dpdk/rdma, then I do net latency test, will that be faster than loopback on just one machine? I do a quick test of ping localhost on CPU E5-2630 v4 @ 2.20GHz, which on average is 0.010ms.

I come up with this question when I was testing my ceph cluster using vstart.sh, I want to minize network latency in order to carefully analyze how osd-related code affect latency.

I want to custom the auth method when connecting smb as a client on Windows to a linux server.

I expect to it to work like this: When connecting as a network map drive, Windows auth center will read from a specified hardware interface(eg. a com port) to get the username + password and send to the server. So there's no need to manually input username+password through keyboard. I just want to know is it possible on windows? If it is, how to configure or program the Windows auth componet? (let's say for example on win10)