[Trilinos-Users] [EXTERNAL] Compile very slowly

[Bartlett, Roscoe A.]

I think all the complex types are on by default.  Check your CMakeCache.txt but I think that is true.

-Ross

> -----Original Message-----
> From: Trilinos-Users [mailto:trilinos-users-bounces at trilinos.org] On Behalf
> Of Bradley, Andrew Michael
> Sent: Tuesday, May 26, 2015 12:37 PM
> To: Feng Xing; trilinos-users at trilinos.org
> Subject: Re: [Trilinos-Users] [EXTERNAL] Compile very slowly
> 
> Hi Feng,
> 
> There may be other issues, but as a first step, I recommend configuring
> Trilinos with explicit template instantiation, like this:
> 
>  -D Trilinos_ENABLE_EXPLICIT_INSTANTIATION:BOOL=ON \
>  -D Tpetra_INST_FLOAT=OFF \
>  -D Tpetra_INST_INT_INT=ON \
>  -D Tpetra_INST_DOUBLE=ON \
>  -D Tpetra_INST_COMPLEX_FLOAT=OFF \
>  -D Tpetra_INST_COMPLEX_DOUBLE=OFF \
>  -D Tpetra_INST_INT_LONG=OFF \
>  -D Tpetra_INST_INT_UNSIGNED=OFF \
>  -D Tpetra_INST_INT_LONG_LONG=OFF \
> 
> (Here I'm being probably unnecessarily explicit in setting types ON and OFF;
> the values I've chosen are in fact almost certainly the defaults.)
> 
> This will isolate the long build time to the Trilinos build. Once the libraries are
> built, your code should build faster against Trilinos.
> 
> Even then, I recommend a further isolation technique: place the core solver
> code (containing the Belos and MueLu headers) in its own source file, and
> put the rest of the application in other files. That way, rebuilding your
> application will not require recompiling the solver part except when you
> change the solver part.
> 
> Cheers,
> Andrew
> 
> ________________________________________
> From: Trilinos-Users <trilinos-users-bounces at trilinos.org> on behalf of Feng
> Xing <snakexf at gmail.com>
> Sent: Monday, May 25, 2015 7:24 AM
> To: trilinos-users at trilinos.org
> Subject: [EXTERNAL] [Trilinos-Users] Compile very slowly
> 
> Hello everyone,
> 
> I tried to compile a smalll code for solving Ax=b with Tpetra, Belos and Meulu.
> There are only about 400 lines. But it takes more than 20 minutes to compiler
> in mac os 10.10, gcc 4.9.2, openmpi 1.7.5, trillions 12.0.1. I would like to ask if it
> is normal or something is not well written in my code.
> 
> The structure is as following. Each member function do one work like create
> matrix (set matrix values, create vector, solve....).
> 
> #include .....
> 
> typedef Tpetra::Map<int, int> map_type;
> typedef Tpetra::CrsMatrix<double, int, int> mat_type;
> typedef .......
> 
> using Teuchos::RCP;
> .....
> 
> class SolveAxb{
> 
>         RCP<const map_type> matMap;
>         RCP<mat_type> A;
>         RCP<vec_type> x;
>         RCP<vec_type> b;
> 
> public:
> .........
> }
> 
> void SolveAxb::MatCreate(){
>         // allocate matrix
> }
> 
> void SolveAxb::MatSetValue(){
>         // set values
> }
> ......
> 
> Thank you very much.
> 
> Feng Xing
> Postdoc in Inria, France
> 
> 
> 
> _______________________________________________
> Trilinos-Users mailing list
> Trilinos-Users at trilinos.org
> https://trilinos.org/mailman/listinfo/trilinos-users
> _______________________________________________
> Trilinos-Users mailing list
> Trilinos-Users at trilinos.org
> https://trilinos.org/mailman/listinfo/trilinos-users