Comments to The GPU version of LICOM3 under HIP framework and its large-scale application
2021
Numerical climate modeling is a key method for scientists and researchers to better understand our planet, and one of the most popular applications that greatly challenges the most state-of-the-art high performance computing (HPC) systems.In this work, LICOM3, a standard ocean model is selected and scaled onto the GPU-based heterogeneous supercomputing system.The authors have done lots of porting and optimizing work to put almost all of the time-consuming computation processes into the GPU side, and greatly reduce the communication overhead.As a result, both the dynamic core and the physics part are ported and parallelized on GPUs.A speedup of 42x is achieved when using 284 AMD GPUs VS 384 CPU cores.Excellent scalability is also achieved.A test of 1/20 degree LICOM3-HIP is reached using 6550 nodes and 26200 GPUs, 2.72 SYPD in time-to-solution.C1