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From: Gleb Natapov (glebn_at_[hidden])
Date: 2006-09-14 02:33:16


On Wed, Sep 13, 2006 at 07:50:02PM +0530, Sunil Patil wrote:
> Hi,
>
> This is somewhat irrelevant question. It was said that in order delivery is
> a feature of Mellanox HCA and not part of IB spec. Is this true for UD type
> QPs also for which IB spec says that "in order delivery" is not guaranteed ?
>
UD is unreliable datagram, Nothing is guaranteed about it. The Mellanox HCA
guarantees inorder delivery of RDMAed data.

> Regards
> Sunil
>
>
>
>
> On 9/13/06, Open MPI <bugs_at_[hidden]> wrote:
> >
> >#366: OpenIB on IA64: we should disable small message RDMA
> >
> >-------------------------+--------------------------------------------------
> >Reporter: jsquyres | Owner: gleb
> > Type: defect | Status: new
> >Priority: major | Milestone: Open MPI 1.1.2
> >Version: trunk | Resolution:
> >Keywords: openib, ia64 |
> >
> >-------------------------+--------------------------------------------------
> >Comment (by gleb):
> >
> >Actually in order delivery is a feature of Mellanox HCA and not part of
> >the IB/iWarp spec.[[BR]]
> >See [http://openib.org/pipermail/openib-general/2006-August/025305.html]
> >for discussion about this. So use_eager_rdma flag is a good candidate to
> >be put in mca-btl-openib-hca-params.ini file.
> >
> >--
> >Ticket URL: <http://svn.open-mpi.org/trac/ompi/ticket/366>
> >Open MPI <http://www.open-mpi.org/>
> >
> >_______________________________________________
> >bugs mailing list
> >bugs_at_[hidden]
> >http://www.open-mpi.org/mailman/listinfo.cgi/bugs
> >
> >

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--
			Gleb.