Lucas It's not the linker but I am guessing it's when I edit something deep within the library.h files. Since everything is linked to it many files are being rebuilt I didn't know about other linker so thanks for the tip. I am sure I will do that in the future.
Anyone, This is my first pull request ever and I don't know exactly how to approach this. Details: I extended the VectorFunctionFromTensorFunction<dim>. to return the gradient of a function, I ended up editing the files: function.h and function.templates.h. but I ended up copying from other files. I am getting the right H1 convergence in my example code so I know what I am doing works. How do I proceed? Best, Abbas On Saturday, July 22, 2023 at 6:53:24 PM UTC+2 lucasm...@gmail.com wrote: > I haven't tried this with deal.II yet, but I've recently started using the > mold linker for programs I write which have many compilation units (link to > GitHub here: https://github.com/rui314/mold). If you're only changing one > line then probably only one compilation unit is being recompiled, so the > bulk of the wait time is probably being taken by the linker. > > Note that, to get a significant speedup, you'll have to recompile with all > of your cores so the linking can be parallelized. I've found that using all > cores to compile sometimes causes make to get killed because it uses too > much memory, but if most things are compiled and you're just on the linking > stage you don't really run into this. > > Alternatively, I think that some other folks use gold linker or the lld > linker (in case you can't get mold to work). > > - Lucas > > > On Sat, Jul 22, 2023, 11:37 AM Abbas Ballout <abbas.b...@gmail.com> wrote: > >> If I change a single line in deal I'll have to wait a good amount of time >> for it to compile. >> Do you all go through this? All I have is a 4 cores and 16 GBs of RAM on >> my Laptop. >> >> On Monday, July 17, 2023 at 9:48:00 AM UTC+2 Abbas Ballout wrote: >> >>> YES. Would take me a while but I ll do it. >>> Be prepared for many questions. >>> >>> On Monday, July 17, 2023 at 2:44:01 AM UTC+2 Wolfgang Bangerth wrote: >>> >>>> On 7/16/23 07:22, Abbas Ballout wrote: >>>> > I get this error when I call the >>>> exact_solution_vector_function.gradient(p1): >>>> > !ERROR Message: >>>> > /An error occurred in line <135> of file >>>> > >>>> </home/abbas/dealii-candi/deal-II/dealii/include/deal.II/base/function.templates.h> >>>> >>>> in function >>>> > dealii::Tensor<1, dim, Number> dealii::Function<dim, >>>> > RangeNumberType>::gradient(const dealii::Point<dim>&, unsigned int) >>>> const >>>> > [with int dim = 2; RangeNumberType = double] >>>> > The violated condition was: >>>> > false >>>> > Additional information: >>>> > You (or a place in the library) are trying to call a function >>>> that is >>>> > declared as a virtual function in a base class but that has not >>>> been >>>> > overridden in your derived class./ >>>> > / >>>> > / >>>> > Calling value works fine but not gradient even though I have >>>> overridden both >>>> > functions. >>>> >>>> You do in your own class, but VectorFunctionFromTensorFunction does >>>> not. >>>> That's not by design, but probably simply because nobody has ever had a >>>> need >>>> for this. Would you like to try and write a patch that adds >>>> VectorFunctionFromTensorFunction::gradient()? You could model it on >>>> VectorFunctionFromTensorFunction::value(). >>>> >>>> Best >>>> Wolfgang >>>> >>>> -- >>>> ------------------------------------------------------------------------ >>>> >>>> Wolfgang Bangerth email: bang...@colostate.edu >>>> www: http://www.math.colostate.edu/~bangerth/ >>>> >>>> >>>> -- >> 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 dealii+un...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/dealii/15f0b1e7-d5ea-49ed-b58f-ea10fae84d52n%40googlegroups.com >> >> <https://groups.google.com/d/msgid/dealii/15f0b1e7-d5ea-49ed-b58f-ea10fae84d52n%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > -- 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 dealii+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/dealii/8ba758f4-06dc-4664-a715-72a7e60ff7bdn%40googlegroups.com.
