[Trilinos-Users] [EXTERNAL] Compile/linking time

[Christopher Thiele]

Hi Andrew,

Thank you very much for the quick reply. I did not know about the
Trilinos_ENABLE_EXPLICIT_INSTANTIATION option. Setting it to true solved my
problem and the build time is now around 40s instead of several minutes.

Thank you,
Christopher


On Mon, Sep 14, 2015 at 4:17 PM, Bradley, Andrew Michael <ambradl at sandia.gov
> wrote:

> Hi Christopher,
>
>
> Let's start with the most obvious possibilities. If you have not already
> done so, would you build Trilinos with these flags:
>
>  -D Trilinos_ENABLE_EXPLICIT_INSTANTIATION:BOOL=ON \
>  -D BUILD_SHARED_LIBS:BOOL=ON \
>
> (If you have already used these flags, we'll need to think more about what
> could be slowing down your driver's build time.)
>
>
> Explicit instantiation will build object files for the Trilinos templated
> classes with the most common types. That should speed up compilation time
> for your driver.
>
>
> Building with shared libs will speed up linking time for your driver.
>
>
> You can use just one or the other of these two options; they are
> complementary.
>
>
> Cheers,
>
> Andrew
>
>
> ------------------------------
> *From:* Trilinos-Users <trilinos-users-bounces at trilinos.org> on behalf of
> Christopher Thiele <christopher.thiele92 at gmail.com>
> *Sent:* Monday, September 14, 2015 10:41 AM
> *To:* trilinos-users at trilinos.org
> *Subject:* [EXTERNAL] [Trilinos-Users] Compile/linking time
>
> Hello,
>
> I just installed Trilinos and tried some examples on solving linear
> systems with Tpetra, Belos and Ifpack2. So far it works fine, but compiling
> and linking my example code, which has less than 200 lines, takes very long
> (several minutes). This makes it a bit difficult for me to try different
> solver and preconditioner settings etc. I did not install any packages
> except the ones mentioned before, Muelu and dependencies. I already tried
> static and dynamic linking, but it does not make much of a difference.
>
> I appreciate any suggestions.
>
> Regards,
> Christopher
>
> P.S.: The call to the compiler reads:
>
> mpicxx -std=c++11 -fopenmp -O3  test.cc -o test  -lteko -lstratimikos
> -lstratimikosbelos -lstratimikosaztecoo -lstratimikosamesos -lstratimikosml
> -lstratimikosifpack -lifpack2-adapters -lifpack2 -lzoltan2 -lanasazitpetra
> -lModeLaplace -lanasazi -lbelostpetra -lbelos -lml -lifpack -lpamgen_extras
> -lpamgen -lamesos2 -lamesos -lgaleri-xpetra -lgaleri -laztecoo -lisorropia
> -lthyratpetra -lthyracore -lthyratpetra -lthyracore -lxpetra-sup
> -lxpetra-ext -lxpetra -ltpetraext -ltpetrainout -ltpetra -lkokkostsqr
> -ltpetrakernels -ltpetraclassiclinalg -ltpetraclassicnodeapi
> -ltpetraclassic -ltpetraext -ltpetrainout -ltpetra -lkokkostsqr
> -ltpetrakernels -ltpetraclassiclinalg -ltpetraclassicnodeapi
> -ltpetraclassic -ltriutils -lzoltan -lrtop -lteuchoskokkoscomm
> -lteuchoskokkoscompat -lteuchosremainder -lteuchosnumerics -lteuchoscomm
> -lteuchosparameterlist -lteuchoscore -lteuchoskokkoscomm
> -lteuchoskokkoscompat -lteuchosremainder -lteuchosnumerics -lteuchoscomm
> -lteuchosparameterlist -lteuchoscore -lkokkosalgorithms -lkokkoscontainers
> -lkokkoscore -lkokkosalgorithms -lkokkoscontainers -lkokkoscore -ltpi
> -lgtest /usr/lib64/liblapack.so /usr/lib64/libblas.so
>
>
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