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From: Adrian Knoth (adi_at_[hidden])
Date: 2006-09-07 18:21:16

On Thu, Sep 07, 2006 at 07:51:28PM +0200, Adrian Knoth wrote:

> No problem, just two hours ago, Christian and me decided to drop
> the idea of oob/tcp6 and go on with only one oob-tcp-component.
> It shouldn't be that hard and I'll try it tonight or tomorrow.

Looks quite promising:

adi_at_ipc654:~/ompi/trunk/test$ (orterun -np 2 -host amun,ipc654 netstat -tpln) 2> /dev/null | grep orte
tcp 0 0* LISTEN 1332/orted
tcp 0 0* LISTEN 1329/orterun
tcp 0 0* LISTEN 27961/orted
tcp6 0 0 :::56783 :::* LISTEN 27961/orted
tcp6 0 0 :::34615 :::* LISTEN 1329/orterun
tcp6 0 0 :::39837 :::* LISTEN 1332/orted

This is one component with two listening sockets.

The main work isn't done yet: the mca_oob_tcp_peer_start_connect.

I've extended it a little bit:

static int mca_oob_tcp_peer_start_connect(mca_oob_tcp_peer_t* peer,
                                           uint16_t af_family);

where af_family is one of {AF_INET, AF_INET6}. I start with AF_INET
and within mca_oob_tcp_peer_start_connect, I call this function
again with AF_INET6 (one level of recursion) to try the other
address family.

This approach (coded last week when I still had a single component)
is bad (long timeouts before trying AF_INET6) and probably wrong:

for the accepting sockets, I've added

   opal_event_t tcp6_send_event;
   opal_event_t tcp6_recv_event;

and perhaps something like this is necessary for peers, too (don't
know this, yet. I'll have a look at it tomorrow).

So long

mail: adi_at_[hidden]	PGP: v2-key via keyserver
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