Your question seems based on the assumption that shared memory is always better than message passing on shared memory systems. Though this seems like a safe assumption, it may not be true in all cases:
http://www.linux-mag.com/id/7884/ of course it all depends on the compiler, the application, the hardware, .... -- Doug Eadline > Hello All, > > I developed my MPI based parallel code for clusters, but now I use it on > multicore/manycore computers (PCs) as well. How to justify (in some > thesis/publication) the use of a distributed memory code (in MPI) on a > shared memory (multicore) machine. I guess to explain two reasons: > > (1) Plan is to use several hunderds processes in future. So MPI like stuff > is necessary. To maintain code uniformity and save cost/time for > developing > shared memory solution (using OpenMP, pthreads etc), I use the same MPI > code on shared memory systems (like multicore PCs). MPI based codes give > reasonable performance on multicore PCs, if not the best. > > (2) The latest MPI implementations are intelligent enough that they use > some efficient mechanism while executing MPI based codes on shared memory > (multicore) machines. (please tell me any reference to quote this fact). > > > Please help me in formally justifying this and comment/modify above two > justifications. Better if I you can suggent me to quote some reference of > any suitable publication in this regard. > > best regards, > Amjad Ali > > -- > This message has been scanned for viruses and > dangerous content by MailScanner, and is > believed to be clean. > > _______________________________________________ > Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing > To change your subscription (digest mode or unsubscribe) visit > http://www.beowulf.org/mailman/listinfo/beowulf > -- Doug -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
