topic Re: oneMKL parallelism in Intel® oneAPI Math Kernel Library

oneMKL parallelism

Nikhil_T — Wed, 20 Jan 2021 10:14:42 GMT

Hi there!

Wanted to know if oneMKL performs the operations in parallel mode. For example, should I implement my own parallel matrix-matrix multiplication in SYCL or should I use the already implemented oneMKL gemm or other routines (if they work already in parallel mode)?

Re: oneMKL parallelism

jimdempseyatthecove — Wed, 20 Jan 2021 13:58:22 GMT

MKL has two versions of its library: sequential and threaded

The sequential version is thread-safe and uses 1 thread internally for MKL functions.

The threaded version is also thread-safe but uses its own thread pool (multi-threaded internally). It is the programmer's responsibility not to oversubscribe threads or at least not to have the over-subscription exhibit unnecessary interference.

Jim Dempsey

Re: oneMKL parallelism

Nikhil_T — Wed, 20 Jan 2021 14:38:33 GMT

How do I choose a specific version from the two @jimdempseyatthecove . Does it selects on its own?

Re: oneMKL parallelism

Gennady_F_Intel — Wed, 20 Jan 2021 14:46:55 GMT

You may check MKL Developer Guide ( see Linking Quick Start) or check MKL Linker Adviser to see the list of libs you need to link with.

Re:oneMKL parallelism

Gennady_F_Intel — Fri, 19 Feb 2021 12:40:44 GMT

The issue is closing and we will no longer respond to this thread. If you require additional assistance from Intel, please start a new thread. Any further interaction in this thread will be considered community only.