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Date: Mon, 15 Jul 2013 10:37:59 +0800
Message-ID: <CAMOc5cz6gP2N62T4QhbTdVar94O4FSdPDsqktD_9vJ0mYVqt_Q@mail.gmail.com>
Subject: Re: SO_REUSEPORT: strange kernel balancer behaviour
From: Sepherosa Ziehau <sepherosa@gmail.com>
To: trafdev <trafdev@mail.ru>
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On Sat, Jul 13, 2013 at 1:16 PM, trafdev <trafdev@mail.ru> wrote:
> Hello.
>
> Could someone help with following problem of SO_REUSEPORT.

The most portable "load balance" between processes listening on the
same TCP addr/port probably is:

s=socket();
bind(s);
listen(s);
/* various socketopt and fcntl as you needed */
pid=fork();
if (pid==0) {
    server_loop(s);
    exit(1);
}
server_loop(s);
exit(1);

Even in Linux or DragonFly SO_REUSEPORT "load balance" between
processes listening on the same TCP addr/port was introduced recently,
so you probably won't want to rely on it.

Best Regards,
sephe

-- 
Tomorrow Will Never Die