experimental zero-copy tcp-proxy
usage: $ make $ ./bin/tcp-proxy
ex: $ ./bin/tcp-proxy localhost:8080 localhost:8000
Some implementations hints:
- by default start
nprocthreads each running independent event loop (libev) - each eventloop accepting connection (socket created with SO_REUSEPORT)
- accepting a connection is malloc-free (occasional reallocations are possible)
- communication happens between downstream <-> upstream by means of splice()
further possible improvement/tunings:
- backoff strategy when when reading from a socket
- pthread CPU/memory affinity
- IRQ and interface's queue processing affinity
- add support of SO_LINGER which can be useful to reduce amount of sockets in TAIM_WAIT state after disconnecting from upstream