[libfabric-users] fi_read questions

Hefty, Sean sean.hefty at intel.com
Mon Oct 19 13:15:28 PDT 2020


> It seems I can get a libfabric version with enabled debuging somewhen
> next week.
> 
> I have set the FI_LOG_LEVEL to info, which generated this output just
> before (or during?) the fi_read-call:
> 
> libfabric:30377:sockets:ep_ctrl:sock_ep_connect():594<warn> Connect
> error, retrying - Operation now in progress - -1
> libfabric:30377:sockets:ep_ctrl:sock_ep_connect():596<warn> Retry
> connect to peer : fi_sockaddr_in://127.0.0.1:33607
> libfabric:30377:sockets:ep_ctrl:sock_ep_connect():594<warn> Connect
> error, retrying - Operation now in progress - -1
> libfabric:30377:sockets:ep_ctrl:sock_ep_connect():596<warn> Retry
> connect to peer : fi_sockaddr_in://127.0.0.1:33607
> libfabric:30377:sockets:ep_ctrl:sock_ep_connect():594<warn> Connect
> error, retrying - Operation now in progress - -1
> libfabric:30377:sockets:ep_ctrl:sock_ep_connect():596<warn> Retry
> connect to peer : fi_sockaddr_in://127.0.0.1:33607
> libfabric:30377:sockets:ep_ctrl:sock_ep_connect():594<warn> Connect
> error, retrying - Operation now in progress - -1
> libfabric:30377:sockets:ep_ctrl:sock_ep_connect():596<warn> Retry
> connect to peer : fi_sockaddr_in://127.0.0.1:33607
> libfabric:30377:sockets:ep_ctrl:sock_ep_get_conn():1879<warn> Unable to
> find connection entry. Error in connecting: Resource temporarily unavailable
> libfabric:30377:sockets:ep_ctrl:sock_ep_get_conn():1882<warn> Unable to
> connect to: fi_sockaddr_in://127.0.0.1:33607
> 
> 
> To me this looks like the socket endpoint was connected to localhost
> (which should be not my endpoint, since that runs on 10.0.10.61:4711)
> under an unused port. Is that something of the inner workings of
> libfabric or what do I read here?

Did you specify source and destination addresses to use?  If not, then it's possible that the loopback address was picked by default.  On the client, you would usually pass in the server's IP address as the node parameter to fi_getinfo.

- Sean


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