I have asked a related question before Why OCaml's threading is considered as `not enough`?
No matter how "bad" ocaml's threading is, I notice some libraries say they can do real threading.
For example, Lwt
Lwt offers a new alternative. It provides very light-weight cooperative threads; ``launching'' a thread is a very fast operation, it does not require a new stack, a new process, or anything else. Moreover context switches are very fast. In fact, it is so easy that we will launch a thread for every system call. And composing cooperative threads will allow us to write highly asynchronous programs.
Also Jane Street's aync_core also provides similar things, if I am right.
But I am quite confused. Do Lwt or aync_core provide threading like Java threading?
If I use them, can I utilise multiple cpu?
In what way, can I get a "real threading" (just like in Java) in OCaml?
Edit
I am still confused.
Let me add a scenario:
I have a server (16 cpu cores) and a server application.
What the server application does are:
- It listens to requests
- For each request, it starts a computational task (let's say costs 2 minutes to finish)
- When each task finishes, the task will either return the result back to the main or just send the result back to client directly
In Java, it is very easy. I create a thread pool, then for each request, I create a thread in that pool. that thread will run the computational task. This is mature in Java and it can utilize the 16 cpu cores. Am I right?
So my question is: can I do the same thing in OCam