5.2 - core layout

[darkone]

http://www.ioftpd.com/~darkone/tmp/ioftpd.png

Width of arrow indicates how much communication there is between two threads. Arrow heads show direction of communication; two headed arrow shows that communication is bi-directional.

[darkone]

Common implementation usually consist of two types of threads; worker & io threads. Encryption, bandwidth managment & internal message handling are done using io threads, and timers are managed by kernel.