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Workaround for cuda 12 issue in cusparse #1508

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merged 2 commits into from
May 11, 2023
Merged

Workaround for cuda 12 issue in cusparse #1508

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4fa3a21
Fixing cuda 12 issue in cusparse
cjnolet May 10, 2023
aa91536
Merge branch 'branch-23.06' into bug-cuda12-cusparse_workaround
benfred May 11, 2023
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7 changes: 6 additions & 1 deletion cpp/include/raft/spectral/detail/matrix_wrappers.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -223,8 +223,11 @@ struct sparse_matrix_t {
cusparseDnVecDescr_t vecX;
RAFT_CUSPARSE_TRY(raft::sparse::detail::cusparsecreatednvec(&vecX, size_x, x));

rmm::device_uvector<value_type> y_tmp(size_y, stream);
raft::copy(y_tmp.data(), y, size_y, stream);

cusparseDnVecDescr_t vecY;
RAFT_CUSPARSE_TRY(raft::sparse::detail::cusparsecreatednvec(&vecY, size_y, y));
RAFT_CUSPARSE_TRY(raft::sparse::detail::cusparsecreatednvec(&vecY, size_y, y_tmp.data()));

// get (scratch) external device buffer size:
//
Expand All @@ -241,6 +244,8 @@ struct sparse_matrix_t {
RAFT_CUSPARSE_TRY(raft::sparse::detail::cusparsespmv(
cusparse_h, trans, &alpha, matA, vecX, &beta, vecY, spmv_alg, external_buffer.raw(), stream));

// FIXME: This is a workaround for a cusparse issue being encountered in CUDA 12
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Is there a link to a github issue for this problem that we can add here?

raft::copy(y, y_tmp.data(), size_y, stream);
// free descriptors:
//(TODO: maybe wrap them in a RAII struct?)
//
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