I am looking forward for iostat

[Pratyush Kshirsagar <pratyush.kshirsagar@xxxxxxxxx>]

Hello Good Morning Friends,
After helping Tim Bisson with Virtio. 
Virtio is doing well and I think its time to move forward.
I would like to work on the iostat display. 
This work has been done in FreeBSD, if anyone can give me links to useful docs would be better.
Probably something near/relating or some gist of where to kick off from, etc. 

Bye :)