potrf_batch_scratchpad_size (Strided Version)

Computes size of scratchpad memory required for potrf_batch (Strided Version) function. This routine belongs to the oneapi::mkl::lapacknamespace.

Syntax

std::int64_t potrf_batch_scratchpad_size(cl::sycl::queue &queue, mkl::uplo uplo, std::int64_t n, std::int64_t lda, std::int64_t stride_a, std::int64_t batch_size)

Description

Computes the number of elements of type T the scratchpad memory to be passed to the potrf_batch (Strided Version) function should be able to hold.

Input Parameters

queue

Device queue where calculations will be performed.

uplo

Indicates whether the upper or lower triangular part of Ai is stored and how Ai is factored:

If uplo = mkl::uplo::upper, the array a stores the upper triangular parts of the matrices Ai.

If uplo = mkl::uplo::lower, the array a stores the lower triangular parts of the matrices Ai.

n

Specifies the order of the matrices Ai, (0 n).

lda

The leading dimension of Ai.

stride_a

The stride between the beginnings of matrices Ai inside the batch.

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 potrf_batch (Strided Version) function should be able to hold.