Hi,
I have discovered something rather odd.
If I run an minimal example (as shown in eigen-with-viennacl.cpp) all
runs fine where I pass a compressed_matrix directly to the copy e.g.
Eigen::SparseMatrix<float, Eigen::RowMajor> spAm;
... code to fill spAm;
viennacl::matrix<float> A = viennacl::compressed_matrix(K, M)
I assume you mean
viennacl::compressed_matrix<float> A =
viennacl::compressed_matrix<float>(K, M);
here? This may result in an unnecessary temporary object, so I'd recommend
viennacl::copy(spAm, A);
However, if my compressed_matrix is wrapped up in a std::shared_ptr
(C++11) I don't seem to be able to copy even when dereferencing.
std::shared_ptr<viennacl::compressed_matrix<T> > shptr =
std::make_shared<viennacl::compressed_matrix<float>
>(viennacl::compressed_matrix<T>(K,M));
viennacl::copy(spAm, *shptr);
T == float?
Strangely, this results in a series of memory errors, the top relevant
ones are here
0x00000000701CF5F6 (0x0000000018C5A670 0x000000001502E060
0x00000000043EB20B 0x00000000043EB230),
_ZN8viennacl7backend13memory_createERNS0_10mem_handleEyRKNS_7contextEPKv()
+ 0x1C6 bytes(s)
0x00000000701C00C0 (0x0000000000000000 0x0000000004627FD0
0x0000000000000010 0x0000000000000004),
_ZN8viennacl6detail9copy_implINS_5tools27const_sparse_matrix_adapterIdjEEdLj1EEEvRKT_RNS_17compressed_matrixIT0_XT1_EEEy()
+ 0x3A0 bytes(s)
0x00000000701BD721 (0x00000000043EB350 0x0000000004627FD0
0x0000000004530620 0x0000000007474070),
_ZN8viennacl4copyIdLi1ELj1EEEvRKN5Eigen12SparseMatrixIT_XT0_EiEERNS_17compressed_matrixIS3_XT1_EEE()
+ 0x321 bytes(s)
which following some c++filt we get the following
viennacl::backend::memory_create(viennacl::backend::mem_handle&,
unsigned long long, viennacl::context const&, void const*)
void
viennacl::detail::copy_impl<viennacl::tools::const_sparse_matrix_adapter<float,
unsigned int>, float,
1u>(viennacl::tools::const_sparse_matrix_adapter<float, unsigned
int> const&, viennacl::compressed_matrix<float, 1u>&, unsigned long
long)
void viennacl::copy<float, 1, 1u>(Eigen::SparseMatrix<float, 1, int>
const&, viennacl::compressed_matrix<float, 1u>&)
Any insight as to why this would be would be appreciated.
compressed_matrix has the copy-constructor implemented, so that should
be okay. Maybe it doesn't copy *all* internal members. I'll try to
reproduce the problem so that I can debug it.
Best regards,
Karli
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