1Spawn multiple threads and run system calls on TCP socket in parallel. 2 3Setup TCP connections on localhost and run system calls connect(2), 4accept(2), send(2), recv(2), and close(2) in parallel. In addition 5stress test for socket splicing, unsplice, max length and idle 6timeout can run. Alternatively to close(2) the tcp drop sysctl(2) 7can be used. The successful operations are counted. 8