Context: Investigating context over MPICH/VCI with multithreads

[minsii]

With team context, OSHMPI may use separate communicator for collectives, and separate window for RMA/AMO. We want to evaluate the performance of multithreaded RMA/AMO/collectives with MPICH/VCI which internally allocates dedicated hardware network resource for communicator or window [1].

[1] MPICH VCI paper: https://dl.acm.org/doi/10.1145/3392717.3392773