Re: PROBLEM: select() on TCP socket sleeps for 1 tick even if data available

[Edgar Toernig]

Michael Lindner wrote:
>[...]
>                 send(s, ".", 1, 0);
>[...]
>         while (select(r+1, &readfds, 0, 0, 0) > 0) {
>[...]
>[select returns only after about 1 HZ]

Ever heard of nagle?  (If not, there's a long thread about
it on the mailing list *g*)

It's not the select that waits. It's a delay in the tcp send
path waiting for more data.  Try disabling it:

        int f=1;
        setsockopt(s, SOL_TCP, TCP_NODELAY, &f, sizeof(f));

Ciao, ET.

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