VecGetOwnershipRange() You can use VecCreateMPIWithArray() using your own array preallocated to be as long as you want. If you profile, you'll probably find this is not a meaningful optimization.
On Tue, Jan 15, 2013 at 4:12 PM, Weston Lowrie <wlowrie at uw.edu> wrote: > Hi, > > I have a problem where I want to grow the size of a Vec (or Mat) many > times during program execution. I think for efficiency purposes I would > just want to allocate a maximum size, and then only use the portion that I > need. In the vector case, it is rather simple, just use the beginning of > the vector, and add values to the end. > > This leads to me to the problem of processor ownership ranges. From a > previous email I noticed one could use the PetscLayout object and keep > adjusting it as the useful part of the vector grows. Does this sound like > a good approach? > > I noticed the PetscLayout is not available in Fortran bindings. Any > workarounds for this? I suppose I can just manually calculate the > processor ranges? > > Thanks for the help, > Wes > > > > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20130115/098bef3b/attachment.html>
