potrf_batch_scratchpad_size (Group Version)#
Computes the size of scratchpad memory required for potrf_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 potrf_batch (Group Version) function must be able to hold.
API#
Syntax#
namespace oneapi::mkl::lapack {
int64_t potrf_batch_scratchpad_size(sycl::queue &queue,
mkl::uplo *uplo,
int64_t *n,
int64_t *lda,
int64_t group_count,
int64_t *group_sizes)
}
This function supports the following precisions and devices:
T |
Devices supported |
|---|---|
|
CPU and GPU |
|
CPU and GPU |
|
CPU and GPU |
|
CPU and GPU |
Input Parameters#
- queue
Device queue where calculations will be performed.
- uplo
Array of
group_countparametersuplog.Each of uplog indicates whether the upper or lower triangular parts of the input matrices are provided.
If uplog=
mkl::uplo::upper, input matrices from arrayabelonging to groupgstore the upper triangular parts.If uplog=
mkl::uplo::lower, input matrices from arrayabelonging to groupgstore the lower triangular parts.- n
Array of
group_countng parameters.Each
ng specifies the order of the input matrices belonging to groupg(ng ≥ 0).- lda
Array of
group_countparametersldag.Each
ldag specifies the leading dimension of the matrices belonging to groupg(ldag ≥max(1, ng)).- group_count
Specifies the number of groups of parameters. Must be at least 0.
- group_sizes
Array of
group_countintegers. Array element with indexgspecifies 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 potrf_batch (Group Version) function must be able to hold.