recvmsg vs recvmmsg

Date:	2018-05-31

Both system calls are used to receive data from a socket. recvmsg() receives just one packet, recvmmsg() can receive multiple packets (as many as the user requests).

This program aims to test the performance of both syscalls.

How to use

usage: cmd [OPTIONS] <port>:

-h Help.
-b <buffer_size> Number of packets allocated to
   send per round.
-c <round_count> Number of rounds (send + receive)
   to run. Every round sends and reads buffer_size
   entries.
-m Use recvmsg(). If not specified, use recvmmsg().

How it works?

The program sends buffer_size packets to the loopback and receives these packets using buffer_size calls to recvmsg() or a single call to recvmmsg(). This is repeated round_count times.

Test results

Not available yet.

It's necessary to run the test in both PTI (Page Table Isolation) patched and not Linux kernels.