SCTP is already implemented in Linux; it is available by default. For development/testing you probably need to install the libsctp-dev and lksctp-tools packages (on Ubuntu or Debian). For throughput evaluation there is a tool called netperfmeter which allows you to use sctp - its use is documented in its manual page. There are some other tools - on Ubuntu or Debian you can do apt-cache search sctp to find more suggestions.