In step-48 the inverse mass matrix is applied by moving the inverse data
into a vector and applying the function scale(), i.e. as in the following
code:
data.cell_loop(&LaplaceOperator::local_apply_cell,
this,
dst,
src,
true);
computing_times[0] += timer.wall_time();
timer.restart();
dst.scale(inv_mass_matrix);
Now I would like to do the same, but use a cell_loop instead of scale().
Thus, I created an additional function called
"local_apply_inverse_mass_matrix" as
template <int dim, int degree, int n_points_1d>
void LaplaceOperator<dim, degree, n_points_1d>::
local_apply_inverse_mass_matrix(
const MatrixFree<dim, Number> & data,
LinearAlgebra::distributed::Vector<Number> & dst,
const LinearAlgebra::distributed::Vector<Number> &src,
const std::pair<unsigned int, unsigned int> & cell_range)
const
{
(void) data;
(void) cell_range;
dst = src;
dst.scale(inv_mass_matrix);
}
When running that code, though, using
LinearAlgebra::distributed::Vector<Number> tmp(src);
data.initialize_dof_vector(tmp);
data.initialize_dof_vector(dst);
data.cell_loop(&LaplaceOperator::local_apply_cell,
this,
tmp,
src,
true);
computing_times[0] += timer.wall_time();
timer.restart();
data.cell_loop(&LaplaceOperator::local_apply_inverse_mass_matrix,
this,
dst,
tmp,
true);
computing_times[1] += timer.wall_time();
computing_times[3] += 1.;
I get the error
An error occurred in line <3338> of file </opt/dealii/include/deal.II/
matrix_free/matrix_free.h> in function
void dealii::internal::VectorDataExchange<dim, Number,
VectorizedArrayType>::compress_start(unsigned int, VectorType&) [with
VectorType = dealii::LinearAlgebra::distributed::Vector<double>; typename
std::enable_if<(dealii::internal::has_compress_start<VectorType>::value &&
dealii::internal::has_exchange_on_subset<VectorType>::value), VectorType>::
type* <anonymous> = 0; int dim = 2; Number = double; VectorizedArrayType =
dealii::VectorizedArray<double, 4>]
The violated condition was:
vec.has_ghost_elements() == false
Additional information:
You are trying to use functionality in deal.II that is currently not
implemented. In many cases, this indicates that there simply didn't appear
much of a need for it, or that the author of the original code did not have
the time to implement a particular case. If you hit this exception, it is
therefore worth the time to look into the code to find out whether you may
be able to implement the missing functionality. If you do, please consider
providing a patch to the deal.II development sources (see the deal.II
website on how to contribute).
Stacktrace:
-----------
#0 ./MF_FES_RK4-Test: void dealii::internal::VectorDataExchange<2, double,
dealii::VectorizedArray<double, 4>
>::compress_start<dealii::LinearAlgebra::distributed::Vector<double,
dealii::MemorySpace::Host>,
(dealii::LinearAlgebra::distributed::Vector<double,
dealii::MemorySpace::Host>*)0>(unsigned int,
dealii::LinearAlgebra::distributed::Vector<double,
dealii::MemorySpace::Host>&)
#1 ./MF_FES_RK4-Test: void dealii::internal::compress_start<2,
dealii::LinearAlgebra::distributed::Vector<double,
dealii::MemorySpace::Host>, double, dealii::VectorizedArray<double, 4>,
(dealii::LinearAlgebra::distributed::Vector<double,
dealii::MemorySpace::Host>*)0>(dealii::LinearAlgebra::distributed::Vector<double,
dealii::MemorySpace::Host>&, dealii::internal::VectorDataExchange<2,
double, dealii::VectorizedArray<double, 4> >&, unsigned int)
#2 ./MF_FES_RK4-Test: dealii::internal::MFWorker<dealii::MatrixFree<2,
double, dealii::VectorizedArray<double, 4> >,
dealii::LinearAlgebra::distributed::Vector<double,
dealii::MemorySpace::Host>,
dealii::LinearAlgebra::distributed::Vector<double,
dealii::MemorySpace::Host>, Step40::LaplaceOperator<2, 2, 4>,
true>::vector_compress_start()
#3 /opt/dealii/lib/libdeal_II.g.so.9.2.0-pre:
dealii::internal::MatrixFreeFunctions::MPICommunication::execute()
#4
/opt/intel/compilers_and_libraries_2019.5.281/linux/tbb/lib/intel64_lin/gcc4.7/libtbb_debug.so.2:
#5
/opt/intel/compilers_and_libraries_2019.5.281/linux/tbb/lib/intel64_lin/gcc4.7/libtbb_debug.so.2:
#6
/opt/intel/compilers_and_libraries_2019.5.281/linux/tbb/lib/intel64_lin/gcc4.7/libtbb_debug.so.2:
#7
/opt/intel/compilers_and_libraries_2019.5.281/linux/tbb/lib/intel64_lin/gcc4.7/libtbb_debug.so.2:
#8
/opt/intel/compilers_and_libraries_2019.5.281/linux/tbb/lib/intel64_lin/gcc4.7/libtbb_debug.so.2:
#9 /lib64/libpthread.so.0:
#10 /lib64/libc.so.6: clone
Why that, and how can I fix it?
Thanks!
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