Developer Reference

Contents

potrs_batch_scratchpad_size (Strided Version)

Computes size of scratchpad memory required for
potrs_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
potrs_batch
(Strided Version) function should be able to hold.

API

Syntax
namespace oneapi::mkl::lapack { std::int64_t potrs_batch_scratchpad_size( cl::sycl::queue &queue, mkl::uplo uplo, std::int64_t n, std::int64_t nrhs, std::int64_t lda, std::int64_t stride_a, std::int64_t ldb, std::int64_t stride_b, std::int64_t batch_size) }
Input Parameters
queue
Device queue where calculations will be performed.
uplo
Indicates how the input matrix has been factored:
If uplo=
mkl::uplo::upper
, the upper triangle
U
i
of
A
i
is stored, where
A
i
=
U
i
T
*
U
i
for real data,
A
i
=
U
i
H
*
U
i
for complex data.
If uplo=
mkl::uplo::lower
, the upper triangle
L
i
of
A
i
is stored, where
A
i
=
L
i
*
L
i
T
for real data,
A
i
=
L
i
*
L
i
H
for complex data.
n
The order of the matrices
A
i
(
0 ≤ n
).
nrhs
The number of right hand sides
(0≤nrhs)
.
lda
The leading dimension of
A
i
.
stride_a
The stride between the beginnings of matrices inside the batch array
a
.
ldb
The leading dimensions of
B
i
.
stride_b
The stride between the beginnings of matrices
B
i
inside the batch array
b
.
batch_size
Specifies the number of problems in a batch.
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
potrs_batch
(Strided 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.