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sytrf_scratchpad_size

Computes size of scratchpad memory required for sytrf (USM 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 sytrf (buffer or USM version) function should be able to hold.

API

Syntax

namespace oneapi::mkl::lapack {
  template<typename T>
  std::int64_t sytrf_scratchpad_size(cl::sycl::queue &queue,
  mkl::uplo uplo,
  std::int64_t n,
  std::int64_t lda)
}

Input Parameters

queue

Device queue where calculations by the sytrf (buffer or USM version) function will be performed.

uplo

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

If uplo = uplo::upper, the array a stores the upper triangular part of the matrix A, and A is factored as U*D*U^T.

If uplo = uplo::lower, the array a stores the lower triangular part of the matrix A, and A is factored as L*D*L^T.

n

The order of the matrix A (0≤n).

lda

The leading dimension of a.

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 sytrf (buffer or USM version) function should be able to hold.

sytrf (USM Version) trtrs