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Support #23386

Support for MPI transfers in artdaq v3

Added by Eric Flumerfelt about 1 month ago.

Status:
New
Priority:
Low
Category:
-
Target version:
-
Start date:
10/07/2019
Due date:
% Done:

0%

Estimated time:
Experiment:
-
Co-Assignees:
Duration:

Description

In artdaq v3 systems, art is started at begin run time, instead of at program start. This means that mpirun cannot be used to start all of the processes in an artdaq system, which in turn means that transfers from art processes to downstream artdaq processes cannot use MPI. There is support in the MPI standard for connecting to processes after program start, which should allow MPI transfer to work under these conditions.



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