But I allocated more than 500 Gb RAN !! How does this sparsity_pattern.reinit work? Does it first calculate the required memory and compares it with available one and then if it is not enough returns error? OR it starts to allocate and when it faces the memory shortage it returns the error?
Thanks. Ehsan On Friday, May 20, 2016 at 3:27:04 PM UTC+2, Bruno Turcksin wrote: > > 2016-05-20 9:12 GMT-04:00 Ehsan <[email protected] <javascript:>>: > > #2 0x00007ffff5cb614b in dealii::SparsityPattern::reinit > > (this=this@entry=0x7fffffffb498, m=829992, n=829992, max_per_row=8032) > > at /deal_II/dealii-8.3.0/source/lac/sparsity_pattern.cc:251 > It could be a memory problem. You try to create a matrix with 829,992 > rows and up to 8,032 elements per row. This means 829,992*8,032 = > 6,666,495,744 elements or 6,666,495,744 * 8 = 53,331,965,952 bytes = > 53 Gb If you are only using one processor, you won't have enough > memory. However max_per_row seems excessively large, you can probably > find a sharper bound. > > Best, > > Bruno > -- The deal.II project is located at http://www.dealii.org/ For mailing list/forum options, see https://groups.google.com/d/forum/dealii?hl=en --- You received this message because you are subscribed to the Google Groups "deal.II User Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
