Out of curiosity, is MPI_Ibcast_init (and friends) something that
will/might be part of the future standard ?
if you want to implement this as a MCA, then you have (at least) to
- add an Ibcast_init field (function pointer) to mca_coll_base_comm_coll_t
struct
- add a 'case MCA_PML_REQUEST_COLL:' in mca_pml_ob1_start
- ensure these request are progressed
- ensure these requests can be MPI_{Wait,Test,Probe!Request_free!Cancel }
and friends
note all coll components must initialize the new ibcast_init field to NULL
and all pml components should handle MCA_PML_REQUEST_COLL.
Cheers,
Gilles
On Saturday, July 30, 2016, Bradley Morgan <morg...@auburn.edu> wrote:
> Hello OpenMPI Developers,
>
> (I am new to the community, so please forgive me if I violate any
> protocols or seem naive here…)
>
>
> I am currently working on a prototype component for persistent nonblocking
> collectives (ompi->mca->coll->libpnbc).
>
> I have integrated my new component and mapped MPI_IBcast to my own _init
> function, which initiates a request but does not start it. Next, I would
> like to create a function pointer for MPI_Start to kick off these
> requests. However, the pointer(s) for MPI_Start live in the pml
> (point-to-point) framework and its implementation seems tacit to MCA. I
> was able to trace the default mapping of MPI_Start for my build to
> pml->ob1->pml_ob1_start.c->mca_pml_ob1_start(), but I can’t seem to
> translate the magic in that path to my own component.
>
> Alternatively, if trying to map MPI_Start is too difficult, I think I
> could also create a custom function like LIBPNBC_Start just to get past
> this and begin testing, but I have not yet found a clean way to make a
> custom component function visible and useable at the MPI level.
>
>
> If anyone has any advice or can direct me to any applicable resources
> (mostly regarding function mapping \ publishing for MPI components) it
> would be greatly appreciated!
>
>
> Thanks very much!
>
>
> -Bradley
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