Subj : Re: multi-threaded server, pthreads & sleep
To   : comp.unix.programmer,comp.programming.threads,comp.lang.c
From : Pascal Bourguignon
Date : Wed Mar 16 2005 02:05 pm

parahat@gmail.com (Parahat Melayev) writes:

> I am trying to writa a multi-client & multi-threaded TCP server.
> There is a thread pool. Each thread in the pool will handle requests
> of multiple clients.
> 
> But here I have a problem. I find a solution but it is not how it must
> be... i think. When threads working without sleep(1) I can't get
> response from server but when I put sleep(1) in thread function as you
> will see in code, everything works fine and server can make echo
> nearly for 40000 clients between 1 or 2 seconds. What am I doing wrong
> here?


I don't know, but instead of:

> 		for(i = 0; i < MAX_CLIENT_PER_THREAD; i++)
> 		{
> 			if(threads[tid].clients[i] != 0)
> 			{
> 				n = recv(threads[tid].clients[i], buffer, MAX_CLIENT_BUFFER, 0);

I'd use select(2) or poll(2).  That would probably avoid the problem
you're hiding with the sleep call.

-- 
__Pascal Bourguignon__                     http://www.informatimago.com/
Cats meow out of angst
"Thumbs! If only we had thumbs!
We could break so much!"

.