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::lapacknamespace.

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.