It is a good new. Thanks for all efforts. Where is the release note? though I have not thousands of nodes like yours (but two quad-core), some questions:
Doe this mean that deal ii is now fully parallel, i.e. all internal functionalities work in parallel (e.g. MG, native linear algebra kernel, preconditioners)? It is possible to do multi-threading (using pthread) in distributed manner now, i.e., domain decomposition based multi-threading (not simple loop splitting)? Cheers RT On Sun, Oct 24, 2010 at 7:28 PM, Wolfgang Bangerth <[email protected]>wrote: > > All, > after more than two years of work by Timo Heister, Martin Kronbichler (who > deserve most of the credit) and myself, Timo merged the branch on which we > have implemented the necessary functionality to completely distribute > meshes > across many processors. Using this, deal.II can now solve problems on > billions (!) of cells and with billions of unknowns if you have enough > processors available (we tested this on up to 16,000). The new step-40 > tutorial program explains how to do this -- it is a variant of step-6 that > requires only some 25 extra lines of code. A (submitted) paper that > describes > this functionality can be found here: > http://iamcs.tamu.edu/file_dl.php?type=preprint&preprint_id=237 > I must admit that it's been quite a while since I was so excited about new > stuff in deal.II! > > I want to give thanks to Carsten Burstedde. The functionality above builds > on > his p4est library to manage fully distributed meshes on thousands, tens of > thousands, and more processors. Carsten helped us out whenever we needed > functionality in p4est and generously provided us with his experience in > implementing algorithms on extremely large clusters. > > Best > W. > -- > ------------------------------------------------------------------------- > Wolfgang Bangerth email: [email protected] > www: http://www.math.tamu.edu/~bangerth/ > > _______________________________________________ > dealii mailing list http://poisson.dealii.org/mailman/listinfo/dealii >
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