Abstract Contemporary evolution of Pacific salmon Oncorhynchus spp. Speciation was complete by the late Miocene, leaving c.
Importance of the work The team believes that strong scaling is key to simulating mesoscale e. If one assumes it takes a computer one second to compute a time step, they say, then a picosecond simulation one hundred trillionths of a second would take around days of simulation time.
Observing phenomena that occur over timespans as long as one nanosecond one billionth of a second would require to days of simulation time Source IXPUG NWChem presentation. This is an important result both for computational chemists as well as other HPC scientists.
More precisely, the AIMD kernel contains three major hotspots that exhibit different performance behavior: A calculation that involves computing a large number of 3D FFTs required when applying VH and Vxc Performing a large number of tall-and-skinny matrix operations to calculate the non-local pseudopotentials.
T HIST The Pacific Northwest (5) I&S Surveys the history and fabric of Washington state's second largest urban center. Topics include early settlements, Tacoma as the Pacific terminus of the Northern Pacific Railroad, commercial and social currents, ethnic and political struggle as recurring forces, and the development of regional. New, many-core scalability results delivered a best paper award to NWChem researchers from Lawrence Berkeley National Laboratory (LBNL) and Pacific Northwest National Laboratory (PNNL) at the latest Intel Xeon Phi User’s Group (IXPUG). Just over , Chinook salmon were reported to be in the Salish Sea in (source: Pacific Salmon Commission - see chart below). This is a 60% reduction in Chinook abundance since the Commission began tracking salmon data in
Enforcing orthogonality, which also performs a number of tall-and-skinny matrix multiplications. Exploiting multicore architectures NWChem is a widely used open-source software suite that has been developed over the past 20 years to solve challenging chemical and biological problems using large-scale parallel algorithms based on first principle calculations.
These calculations provide useful solutions to problems in chemistry and materials science. An example image is shown below. Given the lengthy approximately 20 year lifespan of NWChem, this software suite has had to be adapted to a variety of supercomputer architectures while preserving the functionality for the large NWChem user base.
Now is the time for NWChem to be adapted to many-core. De Jong and his team were given early access to the recently installed 9, Intel Xeon Phi nodes in the Cori Supercomputer.
According to the Top list, Cori is one of the largest systems of its kind. After approximately a year of effort, the team wrote up their success in adding thread-level parallelism that can scale and exploit the many-core capabilities of the Cori Intel Xeon Phi processor-based supercomputer nodes.
Succinctly, smart data distribution and communication algorithms were used enable DFT Density Functional Theory and hybrid-DFT methods to scale to large numbers of processors.
He found that existing libraries did not exploit all the performance capabilities of the many-core hardware, in particular for tall-skinny matrices, so the team developed a new approach. The 3D Pipeline implementation is represented visually below. Pipelining of 3D FFTs to overlap communication and computation.
The team notes in their IXPUG presentation that they see strong scaling behavior on the many-core Intel Xeon Phi nodes to larger numbers of processing cores. This is due, they believe, to the on-package cache memory inside the Intel Xeon Phi processor plus the higher-bandwidth memory on the Cori processor boards.
Intra-node strong scaling was tested by using a simulation containing 64 water molecules in a box. Fabric effects and cluster based strong scaling was tested using a water molecules in a box benchmark. Overall, the team observes a 1. Labels modified to reflect current Intel branding As is expected, interconnect latency becomes visible as the NWChem run is spread out over greater numbers of nodes.
Even so, the Intel Xeon Phi nodes provide an important speed boost up to the point that the interconnect latency impacts performance. Impact of fabric latency on both Intel Xeon and Intel Xeon Phi nodes using the water molecules in a box benchmark. Source IXPUG Summary Many-core scalability is currently a hot research topic that represents an important ingredient in building and running efficiently on an exascale supercomputer.
Both accolades and best paper awards are being bestowed on projects that are setting records and bringing many-core capabilities to a global audience of users. In a very real sense, the focusing on many-core scalability presents opportunities to groups and individual scientists to make a big impact on the future of HPC as well as their own careers and group efforts.
Rob Farber is a global technology consultant and author with an extensive background in HPC and in developing machine learning technology that he applies at national labs and commercial organizations.
Rob can be reached at info techenablement. The publisher of the content has final editing rights and determines what articles are published.org and on a variety of digital and social media platforms.
OPB is a nationally recognized leader in public media, providing Pacific waters, the impact of China’s decision to stop accepting social and political fabric of our state. Co-produced with the.
able resource and has significant impact on the social, po- litical, and economic fabric of the region. We analyzed Through discussion and the sharing of different perspectives, the group constructed con- A map of the Pacific Northwest Q2.
What is the water . Nov 09, · Contemporary evolution of Pacific salmon (Oncorhynchus spp.) is best viewed in the context of the evolutionary history of the species and the dynamic ecosystems they inhabit.
Speciation was complete by the late Miocene, leaving c. six million . Kreis uses a variety of contemporary sources to reconstruct the impact of Wild West shows on German perceptions of Indians.
Although limited to only three cities, his analysis provides an important discussion of how the entertainment industry stimulated Indian role-playing among Germans (see pp. ). We are also not the only funder serving the Pacific Northwest.
There is a diverse collection of foundations that serve a variety of sectors. Funders also have diverse methods and missions across our region and the country. Kreis uses a variety of contemporary sources to reconstruct the impact of Wild West shows on German perceptions of Indians.
Although limited to only three cities, his analysis provides an important discussion of how the entertainment industry stimulated Indian role .