mpi: perform reduction only over contributing nodes
- added a long to describe a redux_map of contributing nodes
- added a test program to assess the behaviour
fixes #3 (closed)
Edited by THIBAULT Samuel
[En cours] Mise en place de quotas sur nos instances GitLab. Plus d'information sur : https://doc-si.inria.fr/pages/viewpage.action?pageId=146834656
[In progress] Quotas installation on our GitLab instances. More information: https://doc-si.inria.fr/pages/viewpage.action?pageId=146834656
fixes #3 (closed)