Functions Threaded with Intel® Threading Building Blocks
In this section,
?
stands for a precision prefix or suffix of the routine name and may have the value of
s, d, c
, or
z
.
The following
function domains are threaded with Intel® Threading Building Blocks (Intel® TBB):
Intel® oneAPI Math Kernel Library
 LAPACK.For a list of threaded routines, see LAPACK Routines.
 Entire Level3 BLAS.
 Fast Poisson, Laplace, and Helmholtz Solver (Poisson Library).
 All Vector Mathematics functions (except service functions).
 PARDISO, a direct sparse solver based on Parallel Direct Sparse Solver (PARDISO*).Intel® oneAPI Math Kernel LibraryFor details, seeoneMKLPARDISO Steps.
 Sparse BLAS.For a list of threaded routines, see Sparse BLAS Routines.
Product and Performance Information


Performance varies by use, configuration and other factors. Learn more at
www.Intel.com/PerformanceIndex.
Notice revision #20201201

LAPACK Routines
The following LAPACK routines are threaded with Intel TBB:
?geqrf
,
?gelqf
,
?getrf
,
?potrf
,
?unmqr*
,
?ormqr*
,
?unmrq*
,
?ormrq*
,
?unmlq*
,
?ormlq*
,
?unmql*
,
?ormql*
,
?sytrd
,
?hetrd
,
?syev
,
?heev
, and
?latrd
.
A number of other LAPACK routines, which are based on threaded LAPACK or BLAS routines, make effective use of Intel TBB threading:
?getrs
,
?gesv
,
?potrs
,
?bdsqr
, and
?gels
.
oneMKL PARDISO Steps
oneMKL
PARDISO StepsIntel® oneAPI Math Kernel Library
Sparse BLAS Routines
The Sparse BLAS inspectorexecutor application programming interface routines
mkl_sparse_?_mv
are threaded with Intel TBB for the general compressed sparse row (CSR) and block sparse row (BSR) formats.
The following Sparse BLAS inspectorexecutor application programming routines are threaded with Intel TBB:
 mkl_sparse_?_mvusing the general compressed sparse row (CSR) and block sparse row (BSR) matrix formats.
 mkl_sparse_?_mmusing the general CSR sparse matrix format and both row and column major storage formats for the dense matrix.