NEMO HPC subgroup: Fri 15 Jul 2016

Attending: Tim Graham, Martin Schreiber, Miguel Castrillo, Oriol Tinto, Cyril Mazauric, Andrew Porter, Silvia Mocavero

1. Summary of HPC-WG activities

BSC is working on two new activities to improve NEMO scalability by: (i) reducing the communication frequency (by using redundant computation) in LIM time splitting and (ii) improving load balance in north-folding

2. Next steps on single node performance testing:

2.1 benchmark suite to be tested by running concurrent sequential instances (deadline: asap). Feedback on the test results by email (all)

2.2 performance counters branch TODOs (deadline September):

2.2.1 Make output look similar to current NEMO output (Silvia)

2.2.2 Replace gettimeofday call with more efficient version, taking into account portability issue (Andy)

2.3 integration of performance counters in the NEMO code (deadline October). Tim to produce a script which automatically integrates the performance counters and timing profiling within the NEMO framework

3. Date for next meeting

A doodle will be open (Silvia)