oneapi::mkl::sparse::update_diagonal_values#
Changes the values of the entries on the main diagonal of a sparse matrix.
This routine also updates any data structures related to optimizations
that have already been done (such as with
oneapi::mkl::sparse::optimize_trsv
or oneapi::mkl::sparse::optimize_gemv
).
Description#
The oneapi::mkl::sparse::update_diagonal_values
routine changes the values of
the entries on the main diagonal of a sparse matrix. The existing sparse structure
must already have all diagonal entries included in the sparsity pattern.
Note
Refer to Error Handling for a detailed description of the possible exceptions thrown.
API#
Syntax#
Using SYCL buffers:
namespace oneapi::mkl::sparse {
void update_diagonal_values(
sycl::queue &queue,
oneapi::mkl::sparse::matrix_handle_t spMat,
sycl::buffer<DATA_TYPE, 1> &new_diag_values);
}
Using USM pointers:
namespace oneapi::mkl::sparse {
sycl::event update_diagonal_values(
sycl::queue &queue,
oneapi::mkl::sparse::matrix_handle_t spMat,
std::int64_t length,
const DATA_TYPE* new_diag_values,
const std::vector<sycl::event> &dependencies = {});
}
Include Files#
oneapi/mkl/spblas.hpp
Input Parameters#
- queue
Specifies the SYCL command queue which will be used for SYCL kernels execution.
- spMat
Handle to object containing sparse matrix and other internal data. Created using one of the
oneapi::mkl::sparse::set_<sparse_matrix_type>_data
routines.Note
Currently, the only supported case for
<sparse_matrix_type>
iscsr
. Only GPU device is currently supported.- new_diag_values
SYCL buffer or device-accessible USM pointer of size at least equal to the smaller of the number of rows and number of columns of the input matrix.
- length
Length of the input vector
new_diag_values
. Must be at least equal to the smaller of the number of rows and number of columns of the input matrix.- dependencies
A vector of type
std::vector<sycl::event>
containing the list of events that theoneapi::mkl::sparse::update_diagonal_values
routine depends on.
Return Values (USM Only)#
- sycl::event
SYCL event which can be waited upon or added as a dependency for the completion of the
update_diagonal_values
routine.