Parallelization of ITS on an IBM SP2 computer
- Sandia National Lab., Albuquerque, NM (United States)
Monte Carlo simulation of complex phenomena that occur in coupled electron-photon radiation transport can tax even the most powerful serial computers. Depending on the number of materials and the required resolution, there is a need to use up to millions of histories to adequately represent three-dimensional transport. The greatest limitation of most Monte Carlo simulations is the large computational time and computing memory required for very large scale problems. Emergence of new parallel computers, such as the IBM SP2, may lessen this difficulty for radiation transport simulation. This study presents the implementation of the Integrated Tiger Series, (ITS) of codes on the IBM SP2 using the PVMe message-passing library to achieve parallel efficiencies as high as 98% on eight computer nodes. ITS is a general purpose state-of-the-art Monte Carlo method for solving linear, time-independent, coupled electron-photon radiation transport problems with or without the presence of external electric and magnetic fields. A batch decomposition approach has been taken toward parallelization of the code. In ITS, the particle histories are divided into {open_quotes}batches{close_quotes} of equal size and the evaluation of the estimated quantities are performed using batch-averaged sample statistics.
- OSTI ID:
- 411730
- Report Number(s):
- CONF-951006--
- Journal Information:
- Transactions of the American Nuclear Society, Journal Name: Transactions of the American Nuclear Society Vol. 73; ISSN 0003-018X; ISSN TANSAO
- Country of Publication:
- United States
- Language:
- English
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