Hi, I've been told UCX is now the default, for openmpi 4.0*
See: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=962180 Is there some performance work to point to ? Regards Alastair On 11/06/2020 10:14, Brice Goglin wrote: > Hello > > You say "It is expected to use UCX as the transport layer under openmpi > and mpich". It is actually optional, OpenMPI works fine without UCX on > non-Mellanox networks. Worse, UCX says it supports some networks such as > OPA while its actual performance is very bad, people have to uninstall > UCX in such cases, or reduce its component priority. Do you plan to make > a hard dependency from OMPI to UCX? > > Brice > > > Le 04/06/2020 à 12:38, Alastair McKinstry a écrit : >> Package: wnpp >> Severity: wishlist >> Owner: Alastair McKinstry <mckins...@debian.org> >> >> * Package name : ucx >> Version : 1.8.0 >> Upstream Author : Mellanox Ltd. <supp...@mellanox.com> >> * URL : https://openucx.github.io/ucx/index >> * License : BSD >> Programming Lang: C >> Description : A high performance communication library for HPC, AI, >> Data analytics, and beyond >> >> Unified Communication X (UCX) provides an optimized communication layer for >> Message Passing (MPI), PGAS/OpenSHMEM libraries and RPC/data-centric >> applications. >> . >> UCX utilizes high-speed networks for inter-node communication, >> and shared memory mechanisms for efficient intra-node communication. >> . >> It is expected to use UCX as the transport layer under openmpi and mpich >> (already in Debian). >> . >> It will be maintained within the Debian Science team. >> -- Alastair McKinstry, <alast...@sceal.ie>, <mckins...@debian.org>, https://diaspora.sceal.ie/u/amckinstry Misentropy: doubting that the Universe is becoming more disordered.
