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

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)

Description

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.

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 triangle Ui of Ai is stored, where Ai = UiT*Ui for real data, Ai = UiH*Ui for complex data.

If uplo=mkl::uplo::lower, the upper triangle Li of Ai is stored, where Ai = Li*LiT for real data, Ai = Li*LiH for complex data.

n

The order of the matrices Ai (0 n).

nrhs

The number of right hand sides (0≤nrhs).

lda

The leading dimension of Ai.

stride_a

The stride between the beginnings of matrices inside the batch array a.

ldb

The leading dimensions of Bi.

stride_b

The stride between the beginnings of matrices Bi inside the batch array b.

batch_size

Specifies the number of problems in a batch.

Exceptions

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.