Comparison to JSC Eventify

[ax3l]

Hi,

I was talking @Z10Frank today at PASC regarding their Smilei paper for PASC22:
https://arxiv.org/abs/2204.12837

We were talking about planned expansions to include MPI.

I showed him redGrapes here and he mentioned they experimented with Eventify:

• https://dl.acm.org/doi/abs/10.1145/3394277.3401858

Biggest challenges in eventify, which we should add to our feature comparison:

• OpenMP tasks started out of Eventify tasks do not work/do not work easily
• nested tasks missing

[Z10Frank]

A small correction: it's not necessary to generate OpenMP tasks from those of another task system for the purpose of my project: one can simply generate the tasks only with that task system.

The challenging part is to make this work inside a parallel region of OpenMP, or to make it compatible with #pragma omp simd directives inside the tasks of the task system, or to support parallelized loops (elsewhere in the code) with classic #pragma omp for. This is to avoid to rewrite from scratch a code which has a non-negligible OpenMP part already implemented.