gesvda_batch_scratchpad_size (Strided Version)

gesvda_batch_scratchpad_size (Strided Version)#

Computes size of scratchpad memory required for gesvda_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 gesvda_batch (Strided Version) function must be able to hold.

API#

Syntax#

 namespace oneapi::mkl::lapack {
   int64_t gesvda_batch_scratchpad_size(sycl::queue &queue,
   int64_t m,
   int64_t n,
   int64_t lda,
   int64_t stride_a,
   int64_t ldu,
   int64_t stride_u,
   int64_t ldvt,
   int64_t stride_vt,
   int64_t batch_size)
}

Input Parameters#

queue

Device queue where calculations will be performed.

m

The number of rows in the matrices Ai.

n

The number of columns in the matrices Ai.

lda

The leading dimension of a. Must be at least max(1, m).

stride_a

The stride between the beginnings of matrices Ai inside the batch array a. Must be at least max(1, lda * n).

stride_s

The stride between the beginnings of arrays Si inside the array s. Must be at least min(m,n).

ldu

The leading dimension of Ui. Must be at least max(1, m).

stride_u

The stride between the beginnings of matrices Ui inside the batch array u. Must be at least max(1, ldu * m).

ldvt

The leading dimension of ViT . Must be at least max(1, n).

stride_vt

The stride between the beginnings of matrices ViTinside the batch array vt. Must be at least max(1, ldvt * n).

Exceptions#

Exception

Description

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 gesvda_batch (Strided Version) function must be able to hold.