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Performance Measurements within Asynchronous Task-based Runtime Systems: A Double White Dwarf Merger as an Application [article]

Patrick Diehl and Dominic Marcello and Parsa Armini and Hartmut Kaiser and Sagiv Shiber and Geoffrey C. Clayton and Juhan Frank and Gregor Daiß and Dirk Pflüger and David Eder and Alice Koniges and Kevin Huck
2021 arXiv   pre-print
Analyzing performance within asynchronous many-task-based runtime systems is challenging because millions of tasks are launched concurrently.  ...  We examine the overhead introduced by these measurements, which is around 1%, with respect to the overall application runtime.  ...  a merger Approximately half of the double white dwarf systems in our galaxy will merge within a Hubble time.  ... 
arXiv:2102.00223v2 fatcat:se34sswsebaafkphpeticvfwny

Octo-Tiger: A New, 3D Hydrodynamic Code for Stellar Mergers that uses HPX Parallelisation [article]

Dominic C. Marcello, Sagiv Shiber, Orsola De Marco, Juhan Frank, Geoffrey C. Clayton, Patrick M. Motl, Patrick Diehl, Hartmut Kaiser
2021 arXiv   pre-print
We also compute the interaction between two white dwarfs from the early mass transfer through to the merger and compare with past simulations of similar systems.  ...  We measure OCTO-TIGERs scaling properties up to a core count of 80,000, showing excellent performance for large problems.  ...  HPX is an open source C++ Standard Library for Concurrency and Parallelism and is within the class of the so-called asynchronous many-task AMT runtime systems.  ... 
arXiv:2101.08226v2 fatcat:cncng2eoardl3o3cbhbtotldde

Portuguese SKA White Book [article]

Domingos Barbosa, Sonia Antón, João Paulo Barraca, Miguel Bergano, Alexandre C. M. Correia, Dalmiro Maia, Valério A. R. M. Ribeiro
2020 arXiv   pre-print
This white book stems from the contributions presented at the Portuguese SKA Days, held on the 6th and 7th February 2018 with the presence of the SKA Deputy Director General Alistair McPherson and the  ...  The meeting was very successful in providing a detailed overview of the SKA status, vision and goals and describes most of the Portuguese contributions to science, technology and the related industry aspirations  ...  ACKNOWLEDGMENTS DB acknowledges support from FCT/MEC through national funds and when applicable co-funded by FEDER -PT2020 partnership agreement under the project UID/EEA/50008/2013.  ... 
arXiv:2005.01140v1 fatcat:gijmylrmvfcj3i7dt3wbsr6vhm

Octo-Tiger: Binary star systems with HPX on Nvidia P100 [article]

Gregor Daiß, Universität Stuttgart, Universität Stuttgart
We developed a tasking system that processes critical compute kernels on the GPU or the processor, depending on their utilization.  ...  Stellar mergers between two suns are a significant field of study since they can lead to astrophysical phenomena such as type Ia supernovae.  ...  Octo-Tiger and its predecessor, Scorpio, have been used to study the merger of double white dwarf systems resulting in the formation of R Coronae Borealis stars [MCML15] .  ... 
doi:10.18419/opus-10179 fatcat:smpzlijvura3bkxkldclkvefeq

Memory leads the way to better computing

H.-S. Philip Wong, Sayeef Salahuddin
2015 Nature Nanotechnology  
The goal of the study was to assay the state of the art, and not to either propose a potential system or prepare and propose a detailed roadmap for its development.  ...  The report itself was drawn from the results of a series of meetings over the second half of 2007, and as such reflects a snapshot in time.  ...  Functional Metrics We define a functional metric as an attribute of a system that directly measures some parameter that relates to the ability of the system to solve problems.  ... 
doi:10.1038/nnano.2015.29 pmid:25740127 fatcat:d6iiuuwcozbxlgn4kxxzdzwd4m

The needle in the hundred square degree haystack: The hunt for binary neutron star mergers with LIGO and Palomar Transient Factory [article]

Leo P. Singer
2015 arXiv   pre-print
These two bursts are possibly consistent with mildly relativistic shocks breaking out from the progenitor envelopes rather than the standard mechanism of internal shocks within an ultra-relativistic jet  ...  The ultimate prize will be joint observation of a compact binary merger in both gravitational and electromagnetic channels.  ...  ., 2013) , a community-developed core Python package for Astronomy. Some of the results in this paper have been derived using HEALPix (Górski et al., 2005) .  ... 
arXiv:1501.03765v1 fatcat:5xh3cqwb6na4lcwhaegbxizsju

The Future of Gamma-Ray Experiments in the MeV-EeV Range [article]

Kristi Engel, Jordan Goodman, Petra Huentemeyer, Carolyn Kierans, Tiffany R. Lewis, Michela Negro, Marcos Santander, David A. Williams, Alice Allen, Tsuguo Aramaki, Rafael Alves Batista, Mathieu Benoit (+87 others)
2022 arXiv   pre-print
There is presently a great deal of interest and scientific expertise available to push forward new technologies, to plan and build space- and ground-based gamma-ray facilities, and to build multi-messenger  ...  This paper highlights new and proposed gamma-ray technologies and facilities that have each been designed to address specific needs in the measurement of extreme astrophysical sources that probe some of  ...  There is an increasing need to perform broadband analyses using data coherently. This is a challenging task.  ... 
arXiv:2203.07360v1 fatcat:bo2azt7w5vfqljygupbsu643lm

Design concepts for the Cherenkov Telescope Array CTA: an advanced facility for ground-based high-energy gamma-ray astronomy

M. Actis, G. Agnetta, F. Aharonian, A. Akhperjanian, J. Aleksić, E. Aliu, D. Allan, I. Allekotte, F. Antico, L. A. Antonelli, P. Antoranz, A. Aravantinos (+660 others)
2011 Experimental astronomy (Print)  
Ground-based gamma-ray astronomy has had a major breakthrough with the impressive results obtained using systems of imaging atmospheric Cherenkov telescopes.  ...  Ground-based gamma-ray astronomy has a huge potential in astrophysics, particle physics and cosmology.  ...  For actuator based alignment it is sufficient to be able to perform an initial alignment within a few days and possible re-alignments within a few hours.  ... 
doi:10.1007/s10686-011-9247-0 fatcat:psluszpbbjacnnlk4bzuo57mgy

CGiS : high-level data-parallel GPU programming [article]

Philipp Lucas, Universität Des Saarlandes, Universität Des Saarlandes
But programming GPUs is not an easy task, especially for a purpose for which they were not originally created. The hardware still is characterised by their legacy as a device to compute images.  ...  The rapid performance increase of Graphics Processing Units (GPUs) is a part of this trend.  ...  The runtime system also has different tasks to perform.  ... 
doi:10.22028/d291-25969 fatcat:6ocdom3f2ndtpmf3ffudhy4dme

Cyber Science and Engineering: A Report of the National Science Foundation Advisory Committee for Cyberinfrastructure Task Force on Grand Challenges

Victoria C. Stodden, National Science Foundation. Advisory Committee For Cyberinfrastructure
concerted effort to use the cyberinfrastructure (CI) for scientific discovery and engineering innovations; CS&E is computational and data-based science and engineering enabled by CI.  ...  This document contains the findings and recommendations of the NSF "" Advisory Committee for Cyberinfrastructure Task Force on Grand Challenges addressed by advances in Cyber Science and Engineering.  ...  The term "compact" refers to the compactstellar nature of the binary members in such systems: white dwarfs, neutron stars, black holes.  ... 
doi:10.7916/d82j6kt7 fatcat:aqboetjcsjfa5ij3qogamd6q5i

Towards exascale computing for cosmological simulations

James Douglas Potter
I would also like to thank David Barnes for providing me with my first job in the field so to speak as an assistant teacher in "Computers for Kids", and for turning over the reins when he moved on.  ...  AS is supported by the Synergia project "Euclid" from the Swiss National Science Foundation.  ...  The Piz Dora scratch file system, a state of the art Lustre parallel file system, has a peak performance of 50 Gigabytes per second.  ... 
doi:10.5167/uzh-204887 fatcat:xg5dng5pw5enpirysejlqexq2i