getrs_batch_scratchpad_size (Strided Version)

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

Syntax

std::int64_t getrs_batch_scratchpad_size(cl::sycl::queue &queue, mkl::transpose trans, std::int64_t n, std::int64_t nrhs, std::int64_t lda, std::int64_t stride_a, std::int64_t stride_ipiv, 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 getrs_batch (Strided Version) function should be able to hold.

Input Parameters

queue

Device queue where calculations will be performed.

trans

Indicates the form of the equations:

If trans = mkl::transpose::nontrans, then Ai*Xi = Bi is solved for Xi.

If trans = mkl::transpose::trans, then AiT*Xi = Bi is solved for Xi.

If trans = mkl::transpose::conjtrans, then AiH*Xi = Bi is solved for Xi.

n

The order of the matrices Ai and the number of rows in matrices Bi (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 Bi inside the batch array b.

stride_ipiv

The stride between the beginnings of arrays ipivi inside the array ipiv.

ldb

The leading dimensions of Bi.

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