Open MPI logo

Open MPI Development Mailing List Archives

  |   Home   |   Support   |   FAQ   |   all Development mailing list

From: Terry D. Dontje (Terry.Dontje_at_[hidden])
Date: 2007-08-23 11:55:35


Rainer Keller wrote:

>Hi Terry,
>On Wednesday 22 August 2007 16:22, Terry D. Dontje wrote:
>
>
>>I thought I would run this by the group before trying to unravel the
>>code and figure out how to fix the problem. It looks to me from some
>>experiementation that when a process matches an unexpected message that
>>the PERUSE framework incorrectly fires a
>>PERUSE_COMM_MSG_MATCH_POSTED_REQ in addition to a
>>PERUSE_COMM_REQ_MATCH_UNEX event. I believe this is wrong that the
>>former event should not be fired in this case.
>>
>>
>You are right, the former event PERUSE_COMM_MSG_MATCH_POSTED_Q should not be
>posted, as this was an unexpected message.
>
>
>
>>If the above assumption is true I think the problem arises because
>>PERUSE_COMM_MSG_MATCH_POSTED_REQ event is fired in function
>>mca_pml_ob1_recv_request_progress which is called by
>>mca_pml_ob1_recv_request_match_specific when a match of an unexpected
>>message has occurred. I am wondering if the
>>PERUSE_COMM_MSG_MATCH_POSTED_REQ event should be moved to a more posted
>>queue centric routine something like mca_pml_ob1_recv_frag_match?
>>
>>
>I believe, this is correct -- at least this works for a large message late
>sender and late receiver test program mpi_peruse.c.
>Should be fixed with the committed patch v15947.
>Actually, there are two other items, one is a missing
>PERUSE_COMM_REQ_REMOVE_FROM_POSTED_Q...
>
>
>
This works for large posted messges but when the posted message is small
you don't see the unexpected messages at all now.

--td

>Additionally, we have a problem that we fire PERUSE_COMM_REQ_ACTIVATE event
>for MPI_*Probe-function calls. The solution is to move
> the pml_base_sendreq.h / pml_base_recv_req.h
>into
> pml_ob1_irecv.c, and resp. pml_ob1_isend.c
>Please see the v15945.
>
>With best regards,
>Rainer
>
>