On Apr 10, 2011, at 1:06 PM, Jed Brown wrote:
> 2011/4/10 Gong Ding <gdiso at ustc.edu>
> This is the patch file to aij.c, which will release excessively preallocated
> memory at MatAssemblyEnd.
> It had been tested in the past several months, both for serial and parallel.
>
> Hope this patch can be accepted.
>
> I'm not sure we can do this unconditionally because it can significantly
> increase the peak memory usage. The most common case (I think) is that
> preallocation is only slightly more than necessary in which case the extra
> space is not very significant. Do we need to add a MatOption for this?
It has to be made optional in some way. Using the MatSetOption() approach
seems a reasonable way to make it optional. So I would ask Gong Ding to make it
optional and submit a new patch when that is done.
Thanks
Barry
