Developer Reference

Contents

hetrf_scratchpad_size

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

API

Syntax
namespace oneapi::mkl::lapack { template<typename T> std::int64_t hetrf_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 hetrf (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
H
.
If uplo = uplo::lower, the array
a
stores the lower triangular part of the matrix
A
, and
A
is factored as
L
*
D
*
L
H
.
n
The order of 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
hetrf
(buffer or USM version) function should be able to hold.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.