Hello,
Whenever I try to run orte-clean on any Ubuntu 20.04 system it errors out
with an "OPAL ERROR: Unreachable" error. This is using the system packages
for openmpi, which is version 4.0.3-0ubuntu1. The full error message is
provided at the end of this email. I've seen this both on the fully man
One motivation is packaging: a single Open MPI implementation has to be
built, that can run on older x86 processors (supporting only SSE) and the
latest ones (supporting AVX512). The op/avx component will select at
runtime the most efficient implementation for vectorized reductions.
On Mon, Jul 19
I meant to ask a while ago about vectorized reductions after I saw a
paper that I can't now find. I didn't understand what was behind it.
Can someone explain why you need to hand-code the avx implementations of
the reduction operations now used on x86_64? As far as I remember, the
paper didn't j
