All posts by John Vetter Burkardt

Accessing BLAS functions in the MKL Library

Many user programs reference the BLAS (Basic Linear Algebra Subprograms) library. The ARC software library does not include a standalone compiled version of this library. However, the BLAS are available in the Intel MKL library, which contains automatically tuned versions of every BLAS function, offering better performance than a user could get from a source code library of BLAS. For details, refer to https://secure.hosting.vt.edu/www.arc.vt.edu/userguide/blas_mkl/ .

Accessing BLAS functions by using ATLAS

Many user programs reference the BLAS (Basic Linear Algebra Subprograms) library. The ARC software library does not include a standalone compiled version of this library. However, the BLAS are available in the ATLAS library, which contains automatically tuned versions of every BLAS function, offering better performance than a user could get from a source code library of BLAS. For details, refer to https://secure.hosting.vt.edu/www.arc.vt.edu/userguide/blas_atlas/ .

ARC System Access Requires Two Factor Authorization

All users need two factor authorization (2FA) to access VT ARC systems.

Details about setting up and using 2FA are in:

https://secure.hosting.vt.edu/www.arc.vt.edu/2fa/

If you are using the DUO app on a cell phone for your 2FA, then you
can click on the key next to "VT", and a code will pop up. Then, when
you log into any 2FA system, you can follow your password by a comma and
then the code:

      password,code
    

This alternative is useful for situations where cell phone service is
an issue, or for dealing with systems with a fast timeout, such as ETX.

Classroom Presentations on High Performance Computing

Instructors of classes with a computational component can request a presentation on selected topics by an ARC computational scientist.

Topics include overviews of various parallel programming methods, machine learning and data science, visualization, and certain software packages. The level and scope of a presentation can be adjusted in advance, in consultation between the instructor and the ARC presenter.

Because our staff are small in number, and busy supporting the ARC systems, we can only respond to a limited number of presentation requests at any one time.

For a list of available presentations, refer to the document: Classroom Presentations. You may also be interested in the visualization presentations described in the document: Visualize This!.

For more information, contact Alana Romanella at aromanel@vt.edu.

Visualize This!

Visualize This! is a classroom outreach program that shows students how to enrich their work with visualization.

Staff members from the Visualization Group at Advanced Research Computing (ARC) have prepared visualization presentations that last one class period. They are also eager to work with the instructor in advance, creating a customized presentation that focuses on topics and data appopriate for a given class.

For more information, go to Visualize This! webpage, or refer to the Visualize This! brochure, or contact Nicholas Polys at npolys@vt.edu.

“Where’s LAPACK?”

Users of Virginia Tech's ARC computing clusters know that, if they want to find information about installed software, they only have to go to the main ARC webpage https://secure.hosting.vt.edu/www.arc.vt.edu/ , and then on the menu bar choose RESOURCES and from that menu select SOFTWARE. This produces an alphabetical list of the more than 250 installed software packages, including the locations and version numbers. But the package listed immediately after lame is LBPMWIA, and as more than one perplexed user has remarked, "Where's LAPACK?"

Continue reading “Where’s LAPACK?”