| Full text | |
| Author(s): |
Sataric, Bogdan
[1]
;
Slavnic, Vladimir
[2]
;
Belic, Aleksandar
[2]
;
Balaz, Antun
[2]
;
Muruganandam, Paulsamy
[3]
;
Adhikari, Sadhan K.
[4]
Total Authors: 6
|
| Affiliation: | [1] Univ Novi Sad, Fac Tech Sci, Trg Dositeja Obradovica 6, Novi Sad 21000 - Serbia
[2] Univ Belgrade, Inst Phys Belgrade, Comp Sci Lab, Pregrevica 118, Belgrade 11080 - Serbia
[3] Bharathidasan Univ, Sch Phys, Palkalaiperur Campus, Tiruchchirappalli 620024, Tamil Nadu - India
[4] UNESP Univ Estadual Paulista, Inst Fis Teor, BR-0114070 Sao Paulo, SP - Brazil
Total Affiliations: 4
|
| Document type: | Journal article |
| Source: | COMPUTER PHYSICS COMMUNICATIONS; v. 200, p. 411-417, MAR 2016. |
| Web of Science Citations: | 45 |
| Abstract | |
We present hybrid OpenMP/MPI (Open Multi-Processing/Message Passing Interface) parallelized versions of earlier published C programs (Vudragovid et al. 2012) for calculating both stationary and non stationary solutions of the time-dependent Gross-Pitaevskii (GP) equation in three spatial dimensions. The GP equation describes the properties of dilute Bose-Einstein condensates at ultra-cold temperatures. Hybrid versions of programs use the same algorithms as the C ones, involving real- and imaginary-time propagation based on a split-step Crank-Nicolson method, but consider only a fully-anisotropic threedimensional GP equation, where algorithmic complexity for large grid sizes necessitates parallelization in order to reduce execution time and/or memory requirements per node. Since distributed memory approach is required to address the latter, we combine MPI programming paradigm with existing OpenMP codes, thus creating fully flexible parallelism within a combined distributed/shared memory model, suitable for different modern computer architectures. The two presented C/OpenMP/MPI programs for real- and imaginary-time propagation are optimized and accompanied by a customizable makefile. We present typical scalability results for the provided OpenMP/MPI codes and demonstrate almost linear speedup until inter-process communication time starts to dominate over calculation time per iteration. Such a scalability study is necessary for large grid sizes in order to determine optimal number of MPI nodes and OpenMP threads per node. (AU) | |
| FAPESP's process: | 12/00451-0 - Study of properties of Bose-Einstein Condensate: dipolar atoms and condensate of fermions |
| Grantee: | Sadhan Kumar Adhikari |
| Support Opportunities: | Research Projects - Thematic Grants |