Please be aware that the GPU and large memory resources on Owens and Pitzer are very busy and that can lead to long queue wait times. If you do not need these resources for your jobs, using the standard compute nodes will ensure your jobs start sooner and the scarcer resources are available for those whose jobs require them. If you are unsure whether you need these resources for your work, please contact us at oschelp@osc.edu

XDMoD Tool

XDMoD, which stands for XD Metrics on Demand, is an NSF-funded open source tool that provides a wide range of metrics pertaining to resource utilization and performance of high performance computing (HPC) resources, and the impact these resources have in terms of scholarship and research.


A downtime for all HPC systems is scheduled from 7 a.m. to 5 p.m., Tuesday, Feb 5, 2019. The downtime will affect the Pitzer, Ruby and Owens Clusters, web portals and HPC file servers. Login services, including my.osc.edu, and access to storage will not be available during this time. In preparation for the downtime, the batch scheduler will begin holding jobs that cannot be completed before 7 a.m., Feb. 5, 2019.


ORCA is an ab initio quantum chemistry program package that contains modern electronic structure methods including density functional theory, many-body perturbation, coupled cluster, multireference methods, and semi-empirical quantum chemistry methods. Its main field of application is larger molecules, transition metal complexes, and their spectroscopic properties. ORCA is developed in the research group of Frank Neese. Visit ORCA Forum for additional information.


Owens switch replacements

OSC will replace the Ethernet switches in the Owens cluster starting from Dec 14. We do not expect any user-visible impacts from the work. Owens will have slightly reduced capacity when we temporarily shut down 2 or 3 racks on the day of the replacement. See here for more info: https://bit.ly/2Qkq0ct

HOWTO: Collect performance data for your program

This page outlines ways to generate and view performance data for your program using tools available at OSC.

Intel Tools

This section describes how to use performance tools from Intel. Make sure that you have an Intel module loaded to use these tools.

Intel VTune

Intel VTune is a tool to generate profile data for your application. Generating profile data with Intel VTune typically involves three steps:


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