potrs_batch_scratchpad_size (Strided Version)¶
Computes size of scratchpad memory required for potrs_batch (Strided
Version) function. This routine belongs to the
oneapi::mkl::lapack
namespace.
Syntax
namespace oneapi::mkl::lapack {
std::int64_t potrs_batch_scratchpad_size(
cl::sycl::queue &queue,
mkl::uplo uplo,
std::int64_t n,
std::int64_t nrhs,
std::int64_t lda,
std::int64_t stride_a,
std::int64_t ldb,
std::int64_t stride_b,
std::int64_t batch_size)
}
.. rubric:: Description
:class: sectiontitle
Computes the number of elements of type T the scratchpad memory to
be passed to the potrs_batch (Strided Version) function should be
able to hold.
.. rubric:: Input Parameters
:class: sectiontitle
queue
Device queue where calculations will be performed.
uplo
Indicates how the input matrix has been factored:
If uplo=\ ``mkl::uplo::upper``, the upper triangle
``U``\ :sub:`i` of ``A``\ :sub:`i` is stored, where
``A``\ :sub:`i` =
``U``\ :sub:`i`\ :sup:`T`\ \*\ ``U``\ :sub:`i` for real data,
``A``\ :sub:`i` =
``U``\ :sub:`i`\ :sup:`H`\ \*\ ``U``\ :sub:`i` for complex
data.
If uplo=\ ``mkl::uplo::lower``, the upper triangle
``L``\ :sub:`i` of ``A``\ :sub:`i` is stored, where
``A``\ :sub:`i` =
``L``\ :sub:`i`\ \*\ ``L``\ :sub:`i`\ :sup:`T` for real data,
``A``\ :sub:`i` =
``L``\ :sub:`i`\ \*\ ``L``\ :sub:`i`\ :sup:`H` for complex
data.
n
The order of the matrices ``A``\ :sub:`i` (``0 ≤ n``).
nrhs
The number of right hand sides ``(0≤nrhs)``.
lda
The leading dimension of ``A``\ :sub:`i`.
stride_a
The stride between the beginnings of matrices inside the batch
array ``a``.
ldb
The leading dimensions of ``B``\ :sub:`i`.
stride_b
The stride between the beginnings of matrices ``B``\ :sub:`i`
inside the batch array ``b``.
batch_size
Specifies the number of problems in a batch.
Exceptions
.. list-table::
* - mkl::lapack::exception
- This exception is thrown when an incorrect argument value is supplied. You can determine the position of the incorrect argument by the info() method of the exception object.
Return Values
The number of elements of type T the scratchpad memory to be passed to the potrs_batch (Strided Version) function should be able to hold.