[Starpu-devel] implicit asynchronous partitioning landed in trunk!

[Samuel Thibault <samuel.thibault@inria.fr>]

Hello,

At last I found the time to implement it: implicit asynchronous
partitioning. It is available in the trunk, which should get branched
into 1.3 sooner or later.

This means that for a given piece of data, you can partition it one or
more ways with starpu_data_partition_plan, and then submit tasks using
whatever handle of the whole data or whatever subdata of the various
planned partitions, StarPU will cope with the necessary
synchronizations.

For instance, for a stencil application, one can split a subdomain into
its interior and halos, and then just submit a task updating the whole
subdomain, then submit MPI sends/receives to update the halos, then submit
again a task updating the whole subdomain, etc. and StarPU will automatically
partition/unpartition each time.

This should help quite a lot to express various applications.

Samuel