High-performance scheduling of multi-beam multi-bunch simulations

Coherent multi-bunch interactions through beam-beam forces or wakefields can cause severe impacts on the beams in circular colliders, if not well understood and countered. COMBI is a parallel multiparticle tracking code developed to study such interactions. Its implementation greatly limits its efficiency when considering realistic configurations featuring effects with different computational requirements, such as the multi-bunch interaction through wakefields, beam-beam interactions, transverse feedback and lattice non- linearities. A new parallel scheduling method, pipelining the effects for each bunch, has greatly sped up the code. The new version of the code, ${\texttt{COMBIp}}$, is presented here.