Developer Reference

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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::lapack
namespace.

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.

API

Syntax
namespace oneapi::mkl::lapack { 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) }
Input Parameters
queue
Device queue where calculations will be performed.
trans
Indicates the form of the equations:
If trans = mkl::transpose::nontrans, then
A
i
*
X
i
=
B
i
is solved for
X
i
.
If trans = mkl::transpose::trans, then
A
i
T
*
X
i
=
B
i
is solved for
X
i
.
If trans = mkl::transpose::conjtrans, then
A
i
H
*
X
i
=
B
i
is solved for
X
i
.
n
The order of the matrices
A
i
and the number of rows in matrices
B
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
B
i
inside the batch array
b
.
stride_ipiv
The stride between the beginnings of arrays
ipiv
i
inside the array
ipiv
.
ldb
The leading dimensions of
B
i
.
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
getrs_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.