On 3/20/07, Tim Wilcox <[EMAIL PROTECTED]> wrote:
It seems to me a good starting point is to divide a problem, say a CFD, into larger sections at the MPI layer and then a smaller division of the subset on the individual Cell processor. This poses the issue of message passing between disparate SPUs. Any input on the characteristics of how this may work and perform?
Hi Tim, Have you read A Synchronous Mode MPI Implementation on the Cell BE™ Architecture http://www.cs.fsu.edu/research/reports/TR-061215.pdf or MPI microtask for programming the Cell Broadband Engine™ processor http://www.research.ibm.com/journal/sj/451/ohara.html I don't see any code available to download for those. Cell SDK 2.1 includes the Accelerator Library and Framework (ALF), and the documentation looks good. I don't think it handles messages between SPUs, but it does help out with things like double buffering. I don't think that Sequoia http://sequoia.stanford.edu transfers data between SPUs either. Dr. Dobbs has an article on optimizing Breadth First Search on the Cell. The authors describe how they implement an all-to-all exchange amongst the SPUs. http://www.ddj.com/dept/64bit/197801624?pgno=4 -- Andrew Shewmaker _______________________________________________ Beowulf mailing list, [EMAIL PROTECTED] To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
