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Displaying 1-13 out of 13 total
Large-Scale Simulations of Sky Surveys
Found in: Computing in Science & Engineering
By Katrin Heitmann,Salman Habib,Hal Finkel,Nicholas Frontiere,Adrian Pope,Vitali Morozov,Steve Rangel,Eve Kovacs,Juliana Kwan,Nan Li,Silvio Rizzi,Joe Insley,Venkatram Vishwanath,Tom Peterka,David Daniel,Patricia Fasel,George Zagaris
Issue Date:September 2014
pp. 14-23
Large-volume sky surveys have accessed the Universe's vast temporal and spatial expanse via a remarkable set of measurements, and many more are sure to follow. To make new predictions for these cosmological observations and to properly interpret them, larg...
Early Experience on the Blue Gene/Q Supercomputing System
Found in: 2013 IEEE International Symposium on Parallel & Distributed Processing (IPDPS)
By Vitali Morozov,Kalyan Kumaran,Venkatram Vishwanath,Jiayuan Meng,Michael E. Papka
Issue Date:May 2013
pp. 1229-1240
The Argonne Leadership Computing Facility (ALCF) is home to Mira, a10 PF Blue Gene/Q (BG/Q) system. The BG/Q system is the third generation in Blue Gene architecture from IBM and like its predecessors combines system-on-chip technology with a proprietary i...
Dataflow-driven GPU performance projection for multi-kernel transformations
Found in: 2012 SC - International Conference for High Performance Computing, Networking, Storage and Analysis
By Jiayuan Meng,Vitali A. Morozov,Venkatram Vishwanath,Kalyan Kumaran
Issue Date:November 2012
pp. 1-11
Applications often have a sequence of parallel operations to be offloaded to graphics processors; each operation can become an individual GPU kernel. Developers typically explore a variety of transformations for each kernel. Furthermore, it is well known t...
The Universe at extreme scale: Multi-petaflop sky simulation on the BG/Q
Found in: 2012 SC - International Conference for High Performance Computing, Networking, Storage and Analysis
By Salman Habib,Vitali Morozov,Hal Finkel,Adrian Pope,Katrin Heitmann,Kalyan Kumaran,Tom Peterka,Joe Insley,David Daniel,Patricia Fasel,Nicholas Frontiere,Zarija Lukic
Issue Date:November 2012
pp. 1-11
Remarkable observational advances have established a compelling cross-validated model of the Universe. Yet, two key pillars of this model -- dark matter and dark energy -- remain mysterious. Next-generation sky surveys will map billions of galaxies to expl...
Tightly Coupled Atomistic-Continuum Simulations of Brain Blood Flow on Petaflop Supercomputers
Found in: Computing in Science & Engineering
By Leopold Grinberg,Joseph A. Insley,Dmitry A. Fedosov,Vitali Morozov,Michael E. Papka,George Em Karniadakis
Issue Date:November 2012
pp. 58-67
Several advances on the mathematical, computational, and visualization fronts have led to the first truly multiscale simulation and visualization of a realistic biological system.
ALCF MPI Benchmarks: Understanding Machine-Specific Communication Behavior
Found in: 2012 41st International Conference on Parallel Processing Workshops (ICPPW)
By Vitali Morozov,Jiayuan Meng,Venkatram Vishwanath,Jeff R. Hammond,Kalyan Kumaran,Michael E. Papka
Issue Date:September 2012
pp. 19-28
As systems grow larger and computation is further spread across nodes, efficient data communication is becoming increasingly important to achieve high throughput and low power consumption for high performance computing systems. However, communication effic...
A new computational paradigm in multiscale simulations: application to brain blood flow
Found in: SC Conference
By Leopold Grinberg,Joseph A. Insley,Vitali Morozov,Michael E. Papka,George Em Karniadakis,Dmitry Fedosov,Kalyan Kumaran
Issue Date:November 2011
pp. 1-5
Interfacing atomistic-based with continuum-based simulation codes is now required in many multiscale physical and biological systems. We present the computational advances that have enabled the first multiscale simulation on 190,740 processors by coupling ...
GROPHECY: GPU performance projection from CPU code skeletons
Found in: SC Conference
By Jiayuan Meng,Vitali A. Morozov,Kalyan Kumaran,Venkatram Vishwanath,Thomas D. Uram
Issue Date:November 2011
pp. 1-11
We propose GROPHECY, a GPU performance projection framework that can estimate the performance benefit of GPU acceleration without actual GPU programming or hardware. Users need only to skeletonize pieces of CPU code that are targets for GPU acceleration. C...
Topology-aware data movement and staging for I/O acceleration on Blue Gene/P supercomputing systems
Found in: SC Conference
By Venkatram Vishwanath,Mark Hereld,Vitali Morozov,Michael E. Papka
Issue Date:November 2011
pp. 1-11
There is growing concern that I/O systems will be hard pressed to satisfy the requirements of future leadership-class machines. Even current machines are found to be I/O bound for some applications. In this paper, we identify existing performance bottlenec...
Accelerating I/O Forwarding in IBM Blue Gene/P Systems
Found in: SC Conference
By Venkatram Vishwanath, Mark Hereld, Kamil Iskra, Dries Kimpe, Vitali Morozov, Michael E. Papka, Robert Ross, Kazutomo Yoshii
Issue Date:November 2010
pp. 1-10
Current leadership-class machines suffer from a significant imbalance between their computational power and their I/O bandwidth. I/O forwarding is a paradigm that attempts to bridge the increasing performance and scalability gap between the compute and I/O...
HACC: extreme scaling and performance across diverse architectures
Found in: Proceedings of SC13: International Conference for High Performance Computing, Networking, Storage and Analysis (SC '13)
By Adrian Pope, Hal Finkel, Katrin Heitmann, Nicholas Frontiere, Salman Habib, Vitali Morozov
Issue Date:November 2013
pp. 1-10
Supercomputing is evolving towards hybrid and accelerator-based architectures with millions of cores. The HACC (Hardware/Hybrid Accelerated Cosmology Code) framework exploits this diverse landscape at the largest scales of problem size, obtaining high scal...
Blood flow: multi-scale modeling and visualization
Found in: Proceedings of the 2011 companion on High Performance Computing Networking, Storage and Analysis Companion (SC '11 Companion)
By Bruce Caswell, Geroge Em Karniadakis, Leopold Grinberg, Michael E. Papka, Vitali Morozov, Dmitry A. Fedosov, Joseph A. Insley
Issue Date:November 2011
pp. 139-140
Multi-scale modeling of arterial blood flow can shed light on the interaction between events happening at micro- and meso-scales (i.e., adhesion of red blood cells to the arterial wall, clot formation) and at macro-scales (i.e., change in flow patterns due...
Poster: performance improvements of front tracking package
Found in: Proceedings of the 2011 companion on High Performance Computing Networking, Storage and Analysis Companion (SC '11 Companion)
By Sameer Shende, Xiaolin Li, James Glimm, Tulin Kaman, Vitali Morozov
Issue Date:November 2011
pp. 63-64
Computational resources on modern high-performance computers are underutilized mainly due to hardware and software performance bottlenecks. Identification of bottlenecks is primary goal of performance analysis, and performance tools are essential for this ...