Original: Fine-grain multithreading -- such as in a barrel processor -- issues instructions for different threads after every cycle , while coarse-grain multithreading only switches to issue instructions from another thread when the current executing thread causes some long latency events ( like page fault etc. ) .
Simplified: Fine-grain multithreading issues instructions for different threads after every cycle , while coarse-grain multithreading only switches to issue instructions from another thread when the current executing thread causes some long latency events ( like page fault etc. ) .