Developed specifically for science, engineering, and financial computations, Intel™ Math Kernel Library (MKL) is a set of threaded and vectorized math routines that work to accelerate various math functions and applications. Anaconda has packaged MKL-powered binary versions of some of the most popular numerical/scientific Python libraries into MKL Optimizations for improved performance.
- MKL Optimizations includes:
- Speed-boosted NumPy, SciPy, scikit-learn, and NumExpr
- The packaging of MKL with redistributable binaries in Anaconda for easy access to the MKL runtime library.
- Python bindings to the low level MKL service functions, which allow for the modification of the number of threads being used during runtime.
In Anaconda versions 2.5 and later, MKL is freely available by default in Anaconda.
If you already have the free Anaconda Python distribution installed, get MKL by upgrading to the latest version:
conda update conda conda update anaconda
If you do not have Anaconda installed, you can download it here.
Existing MKL licenses can be viewed and removed with the graphical Anaconda Navigator license manager or manually with your operating system. For more information please see the License installation page.
Anaconda now also includes a small utility package called
mkl-service which provides a Python interface to some
useful MKL functions that are declared in
mkl_service.h, such as setting
the number of threads to use.
MKL takes roughly 100MB and some use cases do not need it, so users can opt out
of MKL and instead use OpenBLAS for Linux or the
native Accelerate Framework for MacOSX. To opt out, run
conda install nomkl
and then use
conda install to install packages that would normally include
MKL or depend on packages that include MKL, such as
pandas. Conda will install the non-MKL versions of these packages together
with their dependencies. If you are using OS X or Linux, have already installed
these packages or already installed all of Anaconda, and wish to switch away
from MKL, use the command
conda install nomkl numpy scipy scikit-learn numexpr
conda remove mkl mkl-service.
If you already have the free Anaconda Python distribution installed and wish to update MKL:
conda update conda conda update mkl
Dismissing MKL Trial warnings¶
Because past versions of Anaconda did not include MKL linked binaries by default,
some users who have used
conda update --all may see an MKL Trial warning or
a license expiration error, even though MKL linked packages are now free and
installed by default. A license expiration error message may read, “You cannot
run MKL without a license any longer.”
To resolve this, set your installation to use the mkl-linked libraries that do not require a license:
conda remove mkl-rt conda install -f mkl
Then run conda install with the specific packages you choose:
conda install numpy scipy scikit-learn numexpr
or with all of Anaconda:
conda install anaconda
The MKL Optimizations are included in the free Anaconda python distribution, and have been made available by the terms of the Anaconda End User License Agreement.
Past versions of MKL Optimizations were not freely available in Anaconda, and have been made available separately by the terms of the MKL Optimizations End User License Agreement.