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.
Description#
Computes the number of elements of type T the scratchpad memory to be passed to the potrs_batch (Strided Version) function must be able to hold.
API#
Syntax#
namespace oneapi::mkl::lapack {
int64_t potrs_batch_scratchpad_size(
sycl::queue &queue,
mkl::uplo uplo,
int64_t n,
int64_t nrhs,
int64_t lda,
int64_t stride_a,
int64_t ldb,
int64_t stride_b,
int64_t batch_size)
}
Input Parameters#
- queue
Device queue where calculations will be performed.
- uplo
Indicates how the input matrix has been factored:
If uplo=
mkl::uplo::upper, the upper triangleUi ofAi is stored, whereAi =UiT*Ui for real data,Ai =UiH*Ui for complex data.If uplo=
mkl::uplo::lower, the upper triangleLi ofAi is stored, whereAi =Li*LiT for real data,Ai =Li*LiH for complex data.- n
The order of the matrices
Ai (n ≥ 0).- nrhs
The number of right hand sides
(nrhs ≥ 0).- lda
The leading dimension of
Ai (lda≥max(1, n)).- stride_a
The stride between the beginnings of matrices inside the batch array
a(stride_a≥max(1, lda * n)).- ldb
The leading dimensions of
Bi (ldb≥max(1, n)).- stride_b
The stride between the beginnings of matrices
Bi inside the batch arrayb(stride_b≥max(1, ldb * nrhs)).- batch_size
The number of problems in a batch (
batch_size≥ 0).
Exceptions#
Exception |
Description |
|---|---|
|
This exception is thrown when an incorrect argument value is supplied. You can determine the position of the incorrect argument by the |
Return Values#
The number of elements of type T the scratchpad memory to be passed to the potrs_batch (Strided Version) function must be able to hold.