scatterv and gatherv are now point to point free in globopt branch. They share most of their implementation with their non variable counterpart as far as non MPI type are concerned:
Since the size of a non MPI type does not have a fixed size footprint anyway, we typically need to serialize, communicate the archives size ans send them as byte arrays.
All_gatherv implementation is still missing.
Cheers
On 20/10/2016 19:24, alainm wrote:
I just did gather in the same spirit, the slight difference is that the size of the archive are not homogeneous.
So, although it is called gather, it is implemented through MPI_Gatherv.
Which raises another issue, it is likely that the same interface could serve the "v" version of the function, thus simplifying the API. We only need to communicate the numbers of array slots along with the size of the archives.
Cheers
On 20/10/2016 09:17, Lorenz Hübschle-Schneider wrote:
Hi everyone,
On 19/10/16 10:00, alainm wrote:
b) Not so trivial calls need to go though serialization, and manipulate the
archive using point to point communication
I don't understand why archives would need to be communicated using point-to-point communication. I've posted this before with no response, but under which circumstances would something like
https://gist.github.com/lorenzfail?hs/79dab54552fd1f9381da
Cheers,
Lorenz
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Alain Miniussi
Pole Génie Logiciel Scientifique
Observatoire de la Côte d'Azur
Blv de l'Observatoire, Nice
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