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New Test Bed Helps OLCF Scale Up for Next-Generation Supercomputer

Oak Ridge to Acquire Next Generation Supercomputer

Summit to be at least five times faster than Titan The U.S. Department of Energy’s (DOE) Oak Ridge Leadership Computing Facility (OLCF) has signed a contract with IBM to bring a next-generation supercomputer to Oak Ridge National Laboratory (

CUDA Proxy: Managing GPU context

The default GPU compute mode for Titan is Exclusive Process. In this mode, many threads within a process may access the GPU context. To allow multiple processes access to the GPU context, such as multiple MPI tasks on a single node accessing the GPU, the CUDA proxy server was developed. Once enabled, the proxy server transparently manages work issued to the GPU context from multiple pr...

Extermination at Scale

Latest Allinea debugger making waves on Titan When in November 2012 the Oak Ridge Leadership Computing Facility (OLCF) stood up its latest and greatest machine, Titan, it seemed to many that the hard work was done. Not so. While launching a machine on the scale of Titan...

Oak Ridge Leadership Computing Facility Summer Programs Educate Next Generation

Mentors at ORNL supercomputing facility are training computer scientists The OLCF’s Mitchell Griff...

Astrophysicist Messer Speaks to Next-Generation Computational Scientists About High Performance

Graduate fellows learn about scaling their applications for leadership computing Oak Ridge National Laboratory...

Special Report: Graphics Processing Units Speed Results in Extreme-Scale Supercomputers

Hybrid platforms accelerate answers and insights in science and engineering The Accelerating Computa...

Cray User Group Meeting Takes on Next-Generation Computing Challenges

Invitation-only “birds of a feather” group works to assess hybrid computing architecture success The annual

Computer Scientists Collect Computing Tools for Next-Generation Machines

Tools developers attempt to make change to hybrid architectures a smooth transition Researchers using the Oak Ridge Leadership Computing Facility's (OLCF’s) resources can foresee substantial changes in their scientific application code development in the near future. The OLCF’s new supercomputer, a Cray ...

Oak Ridge Staff Members Participate in Extreme Computing Workshop

Talks focus on computer science using next-generation supercomputers Five Oak Ridge National Laboratory staffers presented at the Institute for Nuclear Theory’s (INT’s) workshop, “The Nuclear Physics/Applied Math/Computer Science Interface,” held June 27 through July 1 at the University of Washington. The workshop brought...

Crash Course at OLCF Trains Next Generation of Supercomputing Researchers

Staffers and interns learn to program, compile, and run code in a Unix environment

Fixing Memory Leaks with DDT Leak Reports

Fixing Memory Leaks with DDT Leak Reports Memory leaks occur when memory is allocated, and not correctly freed. This can be particularly problematic if the allocations are large or frequent. Over time, these leaks can degrade performance, or worse, cause the program to fail. DDT's memory debugging features allow analysis of allocated heap memory, both interactively, using the GUI, ...