orgqr_batch_scratchpad_size (Group Version)¶
Computes size of scratchpad memory required for orgqr_batch
(Group 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 orgqr_batch (Group Version) function must be able to hold.
API¶
Syntax¶
namespace oneapi::mkl::lapack {
std::int64_t orgqr_batch_scratchpad_size(sycl::queue &queue,
std::int64_t *m,
std::int64_t *n,
std::int64_t *k,
std::int64_t *lda,
std::int64_t group_count,
std::int64_t *group_sizes)
}
This function supports the following precisions and devices:
T |
Devices supported |
---|---|
|
CPU and GPU |
|
CPU and GPU |
Input Parameters¶
- queue
Device queue where calculations will be performed.
- m
Array of
group_count
parametersm
g as previously supplied to geqrf_batch (Group Version) (m
g ≥ 0).- n
Array of
group_count
parametersn
g as previously supplied to geqrf_batch (Group Version) (n
g ≥ 0).- k
Array of
group_count
parametersk
g.The number of elementary reflectors whose product defines the matrices
Q
i (0 ≤k
g≤n
g).- lda
The leading dimension of
A
i as previously supplied to geqrf_batch (Group Version) (lda
g ≥max(1, m
g)).- group_count
Specifies the number of groups of parameters. Must be at least 0.
- group_sizes
Array of
group_count
integers. Array element with indexg
specifies the number of problems to solve for each of the groups of parametersg
. So the total number of problems to solve,batch_size
, is a sum of all parameter group sizes.
Exceptions¶
Exception |
Description |
---|---|
|
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 orgqr_batch (Group Version) function must be able to hold.