how's nfs' latency today?

let's check it out with tshark & iostat.

$ tshark -q -z rpc,rtt,100003,3,'nfs.nfsstat3!=70'

or... put something is a pcap file.

$ tshark -nlr nfs.pcap -R "rpc.time>0.5"

or... you can use iostat.

# iostat -x -n