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Title: Accelerating nuclear configuration interaction calculations through a preconditioned block iterative eigensolver

In this paper, we describe a number of recently developed techniques for improving the performance of large-scale nuclear configuration interaction calculations on high performance parallel computers. We show the benefit of using a preconditioned block iterative method to replace the Lanczos algorithm that has traditionally been used to perform this type of computation. The rapid convergence of the block iterative method is achieved by a proper choice of starting guesses of the eigenvectors and the construction of an effective preconditioner. These acceleration techniques take advantage of special structure of the nuclear configuration interaction problem which we discuss in detail. The use of a block method also allows us to improve the concurrency of the computation, and take advantage of the memory hierarchy of modern microprocessors to increase the arithmetic intensity of the computation relative to data movement. Finally, we also discuss the implementation details that are critical to achieving high performance on massively parallel multi-core supercomputers, and demonstrate that the new block iterative solver is two to three times faster than the Lanczos based algorithm for problems of moderate sizes on a Cray XC30 system.
ORCiD logo [1] ;  [2] ;  [1] ;  [1] ;  [3] ;  [3]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Computational Research Division
  2. Michigan State Univ., East Lansing, MI (United States). Dept. of Computer Science and Engineering
  3. Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy
Publication Date:
Grant/Contract Number:
AC02-05CH11231; SC0008485; FG02-87ER40371; GE100082
Accepted Manuscript
Journal Name:
Computer Physics Communications
Additional Journal Information:
Journal Volume: 222; Journal ID: ISSN 0010-4655
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Iowa State Univ., Ames, IA (United States); Michigan State Univ., East Lansing, MI (United States)
Sponsoring Org:
USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR) (SC-21); USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); Michigan State Univ. (United States)
Country of Publication:
United States
97 MATHEMATICS AND COMPUTING; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; nuclear configuration interaction; symmetric eigenvalue problem; LOBPCG; preconditioning
OSTI Identifier: