为什么Erlang适用于软实时应用程序，但不适用于硬实时？

Question

或者也许它对硬实时也有好处？

Answer 1

Garbage collection can lead to pauses of unpredictable duration; as such, you can't put hard upper bounds on latency. The definition of hard real time is basically that you can set hard bounds on latency, so this is a problem.

Answer 2

Oh, nobody has answered why it is good for soft realtime though:

In Erlang, each process has its own garbage collector. So if the processes each are kept with a rather small heap, then GC pauses tend to be very small and this gives a really good realtime behaviour.

Answer 3

Vincenzo Nicosia在2008年发表了一篇关于HRT erlang（HARTE）工作的演讲，该演讲还描述了当前BEAM的硬实时等问题。看看http://www.erlang.org/workshop /2007/proceedings/05nicosi.pdf