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From: Tom Clune (Thomas.L.Clune_at_[hidden])
Date: 2007-05-22 21:52:54

Hi Brian,

On May 22, 2007, at 12:00 PM, users-request_at_[hidden] wrote:

> If you run "mpirun -np 1 uptime" with your cell modem up, does that
> work?

Alas, no it produces no output and hangs.

> This isn't one of those corner cases we test very often :).
> If it doesn't work, could you send the output of 'ifconfig'?

LM000953070:~ tlclune$ ifconfig
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
        inet6 ::1 prefixlen 128
        inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1
        inet netmask 0xff000000
gif0: flags=8010<POINTOPOINT,MULTICAST> mtu 1280
stf0: flags=0<> mtu 1280
        ether 00:17:f2:d3:bc:bc
        media: autoselect (none) status: inactive
        supported media: autoselect 10baseT/UTP <half-duplex> 10baseT/UTP
<full-duplex> 10baseT/UTP <full-duplex,hw-loopback> 10baseT/UTP <full-
duplex,flow-control> 100baseTX <half-duplex> 100baseTX <full-duplex>
100baseTX <full-duplex,hw-loopback> 100baseTX <full-duplex,flow-
control> 1000baseT <full-duplex> 1000baseT <full-duplex,hw-loopback>
1000baseT <full-duplex,flow-control> none
        ether 00:19:e3:d8:c3:2f
        media: autoselect (<unknown type>) status: inactive
        supported media: autoselect
wlt2: flags=41<UP,RUNNING> mtu 1500
        lladdr 00:19:e3:ff:fe:77:c6:60
        media: autoselect <full-duplex> status: inactive
        supported media: autoselect <full-duplex>
ppp0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1500
        inet --> netmask 0xff000000

> One
> thing to try would be telling Open MPI to not use the network device
> for the modem.

Well, the setup for the card is so transparent that I'm not even sure
what network device it is using. The card does not use the typical
OS X interface for networks.

> For example, if it is ppp0, try:
> mpirun -np 1 -mca oob_tcp_exclude ppp0 uptime

This seems to at least produce a bit of output before hanging:

LM000953070:~ tlclune$ mpirun -np 1 -mca oob_tcp_exclude ppp0 uptime
[] [0,0,0] mca_oob_tcp_init: invalid
address '' returned for selected oob interfaces.
[] [0,0,0] ORTE_ERROR_LOG: Error in
file oob_tcp.c at line 1216

Perhaps meaningful?


- Tom