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Visible to Intel only — GUID: GUID-F88EF94F-D1F8-48DD-8BDB-B6EAACC3AC2F
Visible to Intel only — GUID: GUID-F88EF94F-D1F8-48DD-8BDB-B6EAACC3AC2F
geqrf_batch_scratchpad_size (Group Version)
Computes size of scratchpad memory required for geqrf_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 geqrf_batch (Group Version) function should be able to hold.
API
Syntax
namespace oneapi::mkl::lapack { int64_t geqrf_batch_scratchpad_size(sycl::queue &queue, int64_t *m, 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 |
|---|---|
float |
CPU and GPU |
double |
CPU and GPU |
std::complex<float> |
CPU and GPU |
std::complex<double> |
CPU and GPU |
Input Parameters
- queue
-
Device queue where calculations will be performed.
- m
-
Array of group_count parameters mg.
Each mg specifies the number of rows in the matrices Ai belonging to group g (mg ≥ 0).
- n
-
Array of group_count parameters ng.
Each ng specifies the number of columns in the matrices Ai belonging to group g (ng ≥ 0).
- lda
-
Array of group_count parameters ldag, each representing the leading dimension of input matrices belonging to group g (ldag ≥ max(1, mg)).
- group_count
-
Specifies the number of groups of parameters. Must be at least 0.
- group_sizes
-
Array of group_count integers. Array element with index g specifies the number of problems to solve for each of the groups of parameters g. So the total number of problems to solve, batch_size, is a sum of all parameter group sizes.
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 geqrf_batch (Group Version) function should be able to hold.