Nathan: Thanks for providing the debug flags. I've attached the output (NetPIPE.debug1) which basically shows that for RoCE the udcm_component_query() will always fail. Can someone verify if this is correct that udcm is not supported for RoCE? When I change the test to force usage it does not work (NetPIPE.debug2).
[hero35][[38845,1],0][connect/btl_openib_connect_udcm.c:452:udcm_component_query]
UD CPC only supported on InfiniBand; skipped on mlx4_0:1
[hero35][[38845,1],0][connect/btl_openib_connect_udcm.c:501:udcm_component_query]
unavailable for use on mlx4_0:1; skipped
from btl_openib_connect_udcm.c
438 static int udcm_component_query(mca_btl_openib_module_t *btl,
439 opal_btl_openib_connect_base_module_t
**cpc)
440 {
441 udcm_module_t *m = NULL;
442 int rc = OPAL_ERR_NOT_SUPPORTED;
443
444 do {
445 /* If we do not have struct ibv_device.transport_device, then
446 we're in an old version of OFED that is IB only (i.e., no
447 iWarp), so we can safely assume that we can use this CPC. */
448 #if defined(HAVE_STRUCT_IBV_DEVICE_TRANSPORT_TYPE) &&
HAVE_DECL_IBV_LINK_LAYER_ETHERN ET
449 if (BTL_OPENIB_CONNECT_BASE_CHECK_IF_NOT_IB(btl)) {
450 BTL_VERBOSE(("UD CPC only supported on InfiniBand; skipped
on %s:%d",
451 ibv_get_device_name(btl->device->ib_dev),
452 btl->port_num));
453 break;
454 }
455 #endif
from base.h
#ifdef OPAL_HAVE_RDMAOE
#define BTL_OPENIB_CONNECT_BASE_CHECK_IF_NOT_IB(btl) \
(((IBV_TRANSPORT_IB != ((btl)->device->ib_dev->transport_type)) || \
(IBV_LINK_LAYER_ETHERNET == ((btl)->ib_port_attr.link_layer))) ? \
true : false)
#else
#define BTL_OPENIB_CONNECT_BASE_CHECK_IF_NOT_IB(btl) \
((IBV_TRANSPORT_IB != ((btl)->device->ib_dev->transport_type)) ? \
true : false)
#endif
So clearly for RoCE the transport is InfiniBand and the link layer is
Ethernet
so this will show that NOT_IB() is true, meaning that udcm is evidently
not supported for RoCE. udcm definitely fails under 1.10.4 for RoCE in
our tests. That means we need rdmacm to work which it evidently does
not at the moment for 2.0.1. Could someone please verify that rdmacm
is not currently working in 2.0.1? And therefore I'm assuming that
2.0.1 has not been successfully tested on RoCE???
Dave
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Wed, 14 Dec 2016 21:12:16 -0700
> From: Nathan Hjelm <hje...@me.com>
> To: drdavetur...@gmail.com, Open MPI Users <users@lists.open-mpi.org>
> Subject: Re: [OMPI users] rdmacm and udcm failure in 2.0.1 on RoCE
> Message-ID: <32528c5d-14bc-42ce-b19a-684b81801...@me.com>
> Content-Type: text/plain; charset=utf-8
>
> Can you configure with ?enable-debug and run with ?mca btl_base_verbose
> 100 and provide the output? It may indicate why neither udcm nor rdmacm are
> available.
>
> -Nathan
>
>
> > On Dec 14, 2016, at 2:47 PM, Dave Turner <drdavetur...@gmail.com> wrote:
> >
> > ------------------------------------------------------------
> --------------
> > No OpenFabrics connection schemes reported that they were able to be
> > used on a specific port. As such, the openib BTL (OpenFabrics
> > support) will be disabled for this port.
> >
> > Local host: elf22
> > Local device: mlx4_2
> > Local port: 1
> > CPCs attempted: rdmacm, udcm
> > ------------------------------------------------------------
> --------------
> >
> > We have had no problems using 1.10.4 on RoCE but 2.0.1 fails to
> > find either connection manager. I've read that rdmacm may have
> > issues under 2.0.1 so udcm may be the only one working. Are there
> > any known issues with that on RoCE? Or does this just mean we
> > don't have RoCE configured correctly?
> >
> > Dave Turner
> >
> > --
> > Work: davetur...@ksu.edu (785) 532-7791
> > 2219 Engineering Hall, Manhattan KS 66506
> > Home: drdavetur...@gmail.com
> > cell: (785) 770-5929
> > <ompi_info.2.0.1.all>_______________________________________________
> > users mailing list
> > users@lists.open-mpi.org
> > https://rfd.newmexicoconsortium.org/mailman/listinfo/users
>
> --
Work: davetur...@ksu.edu (785) 532-7791
2219 Engineering Hall, Manhattan KS 66506
Home: drdavetur...@gmail.com
cell: (785) 770-5929
NetPIPE.debug1
Description: Binary data
NetPIPE.debug2
Description: Binary data
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