[petsc-users] SuperLU + GPUs

[Satish Balay]

The build should work. It should give some verbose info [at runtime] regarding GPUs - from the following code.

>>>>> SRC/cublas_utils.c >>>>>>>>>>>
 void DisplayHeader()
{
    const int kb = 1024;
    const int mb = kb * kb;
    // cout << "NBody.GPU" << endl << "=========" << endl << endl;

    printf("CUDA version:   v %d\n",CUDART_VERSION);
    //cout << "Thrust version: v" << THRUST_MAJOR_VERSION << "." << THRUST_MINOR_VERSION << endl << endl; 

    int devCount;
    cudaGetDeviceCount(&devCount);
    printf( "CUDA Devices: \n \n"); 
<snip>
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Satish

On Wed, 15 Apr 2020, Junchao Zhang wrote:

> I remember Barry said superlu gpu support is broken.
> --Junchao Zhang
> 
> 
> On Wed, Apr 15, 2020 at 3:47 PM Mark Adams <mfadams at lbl.gov> wrote:
> 
> > How does one use SuperLU with GPUs. I don't seem to get any GPU
> > performance data so I assume GPUs are not getting turned on. Am I wrong
> > about that?
> >
> > I configure with:
> > configure options: --with-fc=0 --COPTFLAGS="-g -O2 -fPIC -fopenmp"
> > --CXXOPTFLAGS="-g -O2 -fPIC -fopenmp" --FOPTFLAGS="-g -O2 -fPIC -fopenmp"
> > --CUDAOPTFLAGS="-O2 -g" --with-ssl=0 --with-batch=0 --with-cxx=mpicxx
> > --with-mpiexec="jsrun -g1" --with-cuda=1 --with-cudac=nvcc
> > --download-p4est=1 --download-zlib --download-hdf5=1 --download-metis
> > --download-superlu --download-superlu_dist --with-make-np=16
> > --download-parmetis --download-triangle
> > --with-blaslapack-lib="-L/autofs/nccs-svm1_sw/summit/.swci/1-compute/opt/spack/20180914/linux-rhel7-ppc64le/gcc-6.4.0/netlib-lapack-3.8.0-wcabdyqhdi5rooxbkqa6x5d7hxyxwdkm/lib64
> > -lblas -llapack" --with-cc=mpicc --with-shared-libraries=1 --with-x=0
> > --with-64-bit-indices=0 --with-debugging=0
> > PETSC_ARCH=arch-summit-opt-gnu-cuda-omp --with-openmp=1
> > --with-threadsaftey=1 --with-log=1
> >
> > Thanks,
> > Mark
> >
>