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1.
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Raythena: a vertically integrated scheduler for ATLAS applications on heterogeneous distributed resources
/ Muškinja, Miha (LBL, Berkeley) ; Calafiura, Paolo (LBL, Berkeley) ; Leggett, Charles (LBL, Berkeley) ; Shapoval, Illya (LBL, Berkeley) ; Tsulaia, Vakho (LBL, Berkeley)
/ATLAS Collaboration
The ATLAS experiment has successfully integrated HighPerformance Computing resources (HPCs) in its production system. Unlike the current generation of HPC systems, and the LHC computing grid, the next generation of supercomputers is expected to be extremely heterogeneous in nature: different systems will have radically different architectures, and most of them will provide partitions optimized for different kinds of workloads. [...]
2020 - 6 p.
- Published in : EPJ Web Conf. 245 (2020) 05042
Fulltext: PDF;
In : 24th International Conference on Computing in High Energy and Nuclear Physics, Adelaide, Australia, 4 - 8 Nov 2019, pp.05042
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2.
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Simulating Diverse HEP Workflows on Heterogeneous Architectures
/ Leggett, Charles (LBL, Berkeley) ; Shapoval, Illya (LBL, Berkeley) ; Clemencic, Marco (CERN) ; Jones, Christopher (Fermilab)
We evaluate key patterns and estimate throughput bounds of simulated transformation of conventional high energy physics (HEP) data processing workflows to heterogeneous equivalents. The simulation parameter space includes the number of offloaded tasks, CPU/accelerator ratios of intra-task computations, offload latencies, and run time efficiency of offloaded computations. [...]
FERMILAB-CONF-19-719-SCD.-
IOP, 2020 - 6 p.
- Published in : J. Phys.: Conf. Ser. 1525 (2020) 012030
Fulltext: PDF; External links: Open Access article; Fermilab Library Server (fulltext available)
In : 19th International Workshop on Advanced Computing and Analysis Techniques in Physics Research, Saas Fee, Switzerland, 11 - 15 Mar 2019, pp.012030
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3.
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Raythena: a vertically integrated scheduler for ATLAS applications on heterogeneous distributed resources
/ Muskinja, Miha (Lawrence Berkeley National Laboratory and University of California, Berkeley) ; Calafiura, Paolo (Lawrence Berkeley National Laboratory and University of California, Berkeley) ; Leggett, Charles (Lawrence Berkeley National Laboratory and University of California, Berkeley) ; Tsulaia, Vakhtang (Lawrence Berkeley National Laboratory and University of California, Berkeley) ; Shapoval, Illya (Lawrence Berkeley National Laboratory and University of California, Berkeley)
/ATLAS Collaboration
The ATLAS experiment has successfully integrated High-Performance Computing (HPC) resources in its production system. Unlike the current generation of HPC systems, and the LHC computing grid, the next generation of supercomputers is expected to be extremely heterogeneous in nature: different systems will have radically different architectures, and most of them will provide partitions optimized for different kinds of workloads. [...]
ATL-SOFT-SLIDE-2019-812.-
Geneva : CERN, 2019
Fulltext: PDF; External link: Original Communication (restricted to ATLAS)
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4.
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Simulating HEP Workflows on Heterogeneous Architectures
/ Leggett, Charles (LBL, Berkeley) ; Shapoval, Illya (LBL, Berkeley)
/ATLAS
The next generation of supercomputing facilities, such as Oak Ridge's Summit and Lawrence Livermore's Sierra, show an increasing use of GPGPUs and other accelerators in order to achieve their high FLOP counts. This trend will only grow with exascale facilities. [...]
2018 - 1 p.
- Published in : 10.1109/eScience.2018.00087
In : 14th eScience IEEE International Conference, Amsterdam, Netherlands, 29 Oct - 1 Nov 2018, pp.343
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5.
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Simulating Diverse HEP Workflows on Heterogeneous Architectures
/ Leggett, Charles (Lawrence Berkeley National Laboratory and University of California, Berkeley) ; Shapoval, Illya (Lawrence Berkeley National Laboratory and University of California, Berkeley) ; Clemencic, Marco (CERN) ; Jones, Christopher (Fermi National Accelerator Lab. (US))
/ATLAS Collaboration
The next generation of HPC and HTC facilities, such as Oak Ridge’s Summit, Lawrence Livermore’s Sierra, and NERSC's Perlmutter, show an increasing use of GPGPUs and other accelerators in order to achieve their high FLOP counts. This trend will only grow with exascale facilities such as A21. [...]
ATL-SOFT-SLIDE-2019-074.-
Geneva : CERN, 2019 - 32 p.
Fulltext: PDF; External link: Original Communication (restricted to ATLAS)
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6.
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Measurement of the ratio of branching fractions of the decays $\Lambda_b^0 \!\to \psi(2S) \Lambda$ and $\Lambda_b^0 \!\to J\!/\!\psi \Lambda$
/ LHCb Collaboration
Using $pp$ collisions corresponding to 3$\,\text{fb}^{-1}$ integrated luminosity, recorded by the LHCb experiment at centre-of-mass energies of 7 and 8$\,\text{TeV}$, the ratio of branching fractions \begin{align*} \mathcal{B}(\Lambda^0_b\!\to\psi(2S) \Lambda )/\mathcal{B}(\Lambda^0_b\!\to J/\psi \Lambda)= 0.513 \pm 0.023\, (\text{stat}) \pm 0.016 \, (\text{syst}) \pm 0.011\, (\mathcal{B}) \end{align*} is determined. The first uncertainty is statistical, the second is systematic and the third is due to the external branching fractions used..
arXiv:1902.02092; LHCb-PAPER-2017-041; CERN-EP-2019-003.-
Geneva : CERN, 2019-03-22 - 16 p.
- Published in : JHEP 03 (2019) 126
Article from SCOAP3: PDF; Fulltext: LHCb-Paper-2017-041 - PDF; 1902.02092 - PDF; Related data file(s): ZIP;
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7.
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Simulating HEP Workflows on Heterogeneous Architectures
/ Leggett, Charles (Lawrence Berkeley National Laboratory and University of California, Berkeley) ; Shapoval, Illya (Lawrence Berkeley National Laboratory and University of California, Berkeley)
/ATLAS Collaboration
The next generation of supercomputing facilities, such as Oak Ridge's Summit and Lawrence Livermore's Sierra, show an increasing use of GPGPUs and other accelerators in order to achieve their high FLOP counts. This trend will only grow with exascale facilities. [...]
ATL-SOFT-SLIDE-2018-975.-
Geneva : CERN, 2018 - 14 p.
Fulltext: PDF; External link: Original Communication (restricted to ATLAS)
In : 14th eScience IEEE International Conference, Amsterdam, Netherlands, 29 Oct - 1 Nov 2018
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8.
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9.
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Conditions Data Handling In The Multithreaded ATLAS Framework
/ Leggett, Charles (Lawrence Berkeley National Laboratory and University of California, Berkeley) ; Shapoval, Illya (Lawrence Berkeley National Laboratory and University of California, Berkeley) ; Snyder, Scott (Brookhaven National Laboratory (BNL)) ; Tsulaia, Vakhtang (Lawrence Berkeley National Laboratory and University of California, Berkeley)
/ATLAS Collaboration
In preparation for Run 3 of the LHC, the ATLAS experiment is migrating its offline software to use a multithreaded framework, which will allow multiple events to be processed simultaneously. This implies that the handling of non-event, time-dependent (conditions) data, such as calibrations and geometry, must also be extended to allow for multiple versions of such data to exist simultaneously. [...]
ATL-SOFT-SLIDE-2018-431.-
Geneva : CERN, 2018 - 1 p.
Fulltext: PDF; External link: Original Communication (restricted to ATLAS)
In : 23rd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2018, Sofia, Bulgaria, 9 - 13 Jul 2018
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10.
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Search for $B_c^+$ decays to two charm mesons
/ LHCb Collaboration
A search for decays of $B_c^+$ mesons to two charm mesons is performed for the first time using data corresponding to an integrated luminosity of 3.0 fb$^{-1}$, collected by the LHCb experiment in $pp$ collisions at centre-of-mass energies of 7 and 8 TeV. The decays considered are $B_c^+\to D^{(*)+}_{(s)} \overline{D}^{(*)0}$ and $B_c^+\to D^{(*)+}_{(s)} D^{(*)0}$, which are normalised to high-yield $B^+\to D^+_{(s)} \overline{D}^0$ decays. [...]
arXiv:1712.04702; LHCB-PAPER-2017-045; CERN-EP-2017-313; LHCB-PAPER-2017-045.-
Geneva : CERN, 2018-05 - 20 p.
- Published in : Nucl. Phys. B 930 (2018) 563-582
Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP; External link: Figures, tables and other information
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