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Portero, A., Falquez, C., Ho, N., Petrakis, P., Nassyr, S., Marazakis, M., . . . Suarez, E. (2023). COMPESCE: A Co-design Approach for Memory Subsystem Performance Analysis in HPC Many-Cores. In: Architecture of Computing Systems: 36th International Conference, ARCS 2023, Proceedings. Paper presented at 36th International Conference on Architecture of Computing Systems, ARCS 2023, Athens, Greece, Jun 13 2023 - Jun 15 2023 (pp. 105-119). Springer Nature
Open this publication in new window or tab >>COMPESCE: A Co-design Approach for Memory Subsystem Performance Analysis in HPC Many-Cores
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2023 (English)In: Architecture of Computing Systems: 36th International Conference, ARCS 2023, Proceedings, Springer Nature , 2023, p. 105-119Conference paper, Published paper (Refereed)
Abstract [en]

This paper explores the memory subsystem design through gem5 simulations of a non-uniform memory access (NUMA) architecture with ARM cores equipped with vector engines. And connected to a Network-on-Chip (NoC) following the Coherent Hub Interface (CHI) protocol. The study quantifies the benefits of vectorization, prefetching, and multichannel NoC configurations using a benchmark for generating memory patterns and indexed accesses. The outcomes provide insights into improving bus utilization and bandwidth and reducing stalls in the system. The paper proposes hardware/software (HW/SW) advancements to reach and use the HBM device with a higher percentage than 80% at the memory controllers in the simulated manycore system.

Place, publisher, year, edition, pages
Springer Nature, 2023
Keywords
Co-design, gem5, HPC, Network on Chip
National Category
Computer Systems
Identifiers
urn:nbn:se:kth:diva-337883 (URN)10.1007/978-3-031-42785-5_8 (DOI)2-s2.0-85171444909 (Scopus ID)
Conference
36th International Conference on Architecture of Computing Systems, ARCS 2023, Athens, Greece, Jun 13 2023 - Jun 15 2023
Note

Part of ISBN 9783031427848

QC 20231010

Available from: 2023-10-10 Created: 2023-10-10 Last updated: 2023-10-10Bibliographically approved
Smail, R. E., Batelaan, M., Horsley, R., Nakamura, Y., Perlt, H., Pleiter, D., . . . Zanotti, J. M. (2023). Constraining beyond the standard model nucleon isovector charges. Physical Review D: covering particles, fields, gravitation, and cosmology, 108(9), Article ID 094511.
Open this publication in new window or tab >>Constraining beyond the standard model nucleon isovector charges
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2023 (English)In: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 108, no 9, article id 094511Article in journal (Refereed) Published
Abstract [en]

At the TeV scale, low-energy precision observations of neutron characteristics provide unique probes of novel physics. Precision studies of neutron decay observables are susceptible to beyond the Standard Model (BSM) tensor and scalar interactions, while the neutron electric dipole moment, dn, also has high sensitivity to new BSM CP-violating interactions. To fully utilize the potential of future experimental neutron physics programs, matrix elements of appropriate low-energy effective operators within neutron states must be precisely calculated. We present results from the QCDSF/UKQCD/CSSM Collaboration for the isovector charges gT, gA and gS of the nucleon, ς and Ξ baryons using lattice QCD methods and the Feynman-Hellmann theorem. We use a flavor symmetry breaking method to systematically approach the physical quark mass using ensembles that span five lattice spacings and multiple volumes. We extend this existing flavor-breaking expansion to also account for lattice spacing and finite volume effects in order to quantify all systematic uncertainties. Our final estimates of the nucleon isovector charges are gT=1.010(21)stat(12)sys,gA=1.253(63)stat(41)sys and gS=1.08(21)stat(03)sys renormalized, where appropriate, at μ=2 GeV in the MS¯ scheme.

Place, publisher, year, edition, pages
American Physical Society (APS), 2023
National Category
Subatomic Physics
Identifiers
urn:nbn:se:kth:diva-340967 (URN)10.1103/PhysRevD.108.094511 (DOI)001119009700015 ()2-s2.0-85178092762 (Scopus ID)
Note

QC 20231218

Available from: 2023-12-18 Created: 2023-12-18 Last updated: 2024-02-29Bibliographically approved
Brank, B. & Pleiter, D. (2023). CPU Architecture Modelling and Co-design. In: High Performance Computing - 38th International Conference, ISC High Performance 2023, Proceedings: . Paper presented at 38th International Conference on High Performance Computing, ISC High Performance 2023, Hamburg, Germany, May 21 2023 - May 25 2023 (pp. 3-21). Springer Nature
Open this publication in new window or tab >>CPU Architecture Modelling and Co-design
2023 (English)In: High Performance Computing - 38th International Conference, ISC High Performance 2023, Proceedings, Springer Nature , 2023, p. 3-21Conference paper, Published paper (Refereed)
Abstract [en]

Co-design has become an established process for both developing high-performance computing (HPC) architectures (and, more specifically, CPU architectures) as well as HPC applications. The co-design process is frequently based on models. This paper discusses an approach to CPU architecture modelling and its relation to modelling theory. The approach is implemented using the gem5 simulator for Arm-based CPU architectures and applied for the purpose of generating co-design knowledge using two applications that are widely used on HPC systems.

Place, publisher, year, edition, pages
Springer Nature, 2023
Keywords
Arm, computer architecture modelling, computer architecture simulation, gem5, GPAW, Graviton 2, GROMACS, HPC applications, HPC architectures
National Category
Computer Sciences Computer Systems
Identifiers
urn:nbn:se:kth:diva-338629 (URN)10.1007/978-3-031-32041-5_1 (DOI)2-s2.0-85161134699 (Scopus ID)
Conference
38th International Conference on High Performance Computing, ISC High Performance 2023, Hamburg, Germany, May 21 2023 - May 25 2023
Note

Part of ISBN 9783031320408

QC 20231102

Available from: 2023-11-02 Created: 2023-11-02 Last updated: 2023-11-02Bibliographically approved
Kunkel, J. M., Boehme, C., Decker, J., Magugliani, F., Pleiter, D., Koller, B., . . . Yaman, B. (2023). DECICE: Device-Edge-Cloud Intelligent Collaboration Framework. In: Proceedings of the 20th ACM International Conference on Computing Frontiers 2023, CF 2023: . Paper presented at 20th ACM International Conference on Computing Frontiers, CF 2023, Bologna, Italy, May 9 2023 - May 11 2023 (pp. 266-271). Association for Computing Machinery (ACM)
Open this publication in new window or tab >>DECICE: Device-Edge-Cloud Intelligent Collaboration Framework
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2023 (English)In: Proceedings of the 20th ACM International Conference on Computing Frontiers 2023, CF 2023, Association for Computing Machinery (ACM) , 2023, p. 266-271Conference paper, Published paper (Refereed)
Abstract [en]

DECICE is a Horizon Europe project that is developing an AI-enabled open and portable management framework for automatic and adaptive optimization and deployment of applications in computing continuum encompassing from IoT sensors on the Edge to large-scale Cloud/HPC computing infrastructures. In this paper, we describe the DECICE framework and architecture. Furthermore, we highlight use-cases for framework evaluation: intelligent traffic intersection, magnetic resonance imaging, and emergency response.

Place, publisher, year, edition, pages
Association for Computing Machinery (ACM), 2023
Keywords
AI-enabled Computing Continuum, Cloud-Edge Orchestration, Cognitive Cloud, Digital Twin, KubeEdge
National Category
Computer Systems
Identifiers
urn:nbn:se:kth:diva-336730 (URN)10.1145/3587135.3592179 (DOI)001116950900044 ()2-s2.0-85169615382 (Scopus ID)
Conference
20th ACM International Conference on Computing Frontiers, CF 2023, Bologna, Italy, May 9 2023 - May 11 2023
Note

Part of ISBN 9798400701405

QC 20230919

Available from: 2023-09-19 Created: 2023-09-19 Last updated: 2024-03-12Bibliographically approved
Brank, B. & Pleiter, D. (2022). Assessing the State of Autovectorization Support based on SVE. In: 2022 IEEE INTERNATIONAL CONFERENCE ON CLUSTER COMPUTING (CLUSTER 2022): . Paper presented at IEEE International Conference on Cluster Computing (CLUSTER), SEP 06-09, 2022, Heidelberg, GERMANY (pp. 556-562). Institute of Electrical and Electronics Engineers (IEEE)
Open this publication in new window or tab >>Assessing the State of Autovectorization Support based on SVE
2022 (English)In: 2022 IEEE INTERNATIONAL CONFERENCE ON CLUSTER COMPUTING (CLUSTER 2022), Institute of Electrical and Electronics Engineers (IEEE) , 2022, p. 556-562Conference paper, Published paper (Refereed)
Abstract [en]

So-called SIMD instructions, which trigger operations that process in each clock cycle a data tuple, have become widespread in modern processor architectures. In particular, processors for high-performance computing (HPC) systems rely on this additional level of parallelism to reach a high throughput of arithmetic operations. Leveraging these SIMD instructions can still be challenging for application software developers. This challenge has become simpler due to a compiler technique called auto-vectorization. In this paper, we explore the current state of auto-vectorization capabilities using state-of-the-art compilers using a recent extension of the Arm instruction set architecture, called SVE. We measure the performance gains on a recent processor architecture supporting SVE, namely the Fujitsu A64FX processor.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2022
Series
IEEE International Conference on Cluster Computing, ISSN 1552-5244
Keywords
ISA, auto-vectorization, Arm, SVE
National Category
Computer Sciences
Identifiers
urn:nbn:se:kth:diva-324314 (URN)10.1109/CLUSTER51413.2022.00073 (DOI)000920273100058 ()2-s2.0-85140893554 (Scopus ID)
Conference
IEEE International Conference on Cluster Computing (CLUSTER), SEP 06-09, 2022, Heidelberg, GERMANY
Note

Part of proceedings: ISBN 978-1-6654-9856-2QC 20230227

Available from: 2023-02-27 Created: 2023-02-27 Last updated: 2023-02-27Bibliographically approved
Alam, S. R., Bartolome, J., Carpene, M., Happonen, K., Lafoucriere, J.-C. & Pleiter, D. (2022). Fenix: A Pan-European Federation of Supercomputing and Cloud e-Infrastructure Services. Communications of the ACM, 65(4), 46-47
Open this publication in new window or tab >>Fenix: A Pan-European Federation of Supercomputing and Cloud e-Infrastructure Services
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2022 (English)In: Communications of the ACM, ISSN 0001-0782, E-ISSN 1557-7317, Vol. 65, no 4, p. 46-47Article in journal, Editorial material (Other academic) Published
Place, publisher, year, edition, pages
Association for Computing Machinery (ACM), 2022
National Category
Computer Sciences
Identifiers
urn:nbn:se:kth:diva-310755 (URN)10.1145/3511802 (DOI)000772212000017 ()2-s2.0-85127570583 (Scopus ID)
Note

QC 20220411

Available from: 2022-04-11 Created: 2022-04-11 Last updated: 2023-06-27Bibliographically approved
Qasem, A., Anzt, H., Ayguade, E., Cahill, K., Canal, R., Chan, J., . . . Tomko, K. (2022). Lightning Talks of EduHPC 2022. In: 2022 IEEE/ACM INTERNATIONAL WORKSHOP ON EDUCATION FOR HIGH PERFORMANCE COMPUTING (EDUHPC): . Paper presented at IEEE/ACM International Workshop on Education for High Performance Computing (EduHPC), NOV 13-18, 2022, Dallas, TX (pp. 42-49). Institute of Electrical and Electronics Engineers (IEEE)
Open this publication in new window or tab >>Lightning Talks of EduHPC 2022
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2022 (English)In: 2022 IEEE/ACM INTERNATIONAL WORKSHOP ON EDUCATION FOR HIGH PERFORMANCE COMPUTING (EDUHPC), Institute of Electrical and Electronics Engineers (IEEE) , 2022, p. 42-49Conference paper, Published paper (Refereed)
Abstract [en]

The lightning talks at EduHPC provide an opportunity to share early results and insights on parallel and distributed computing (PDC) education and training efforts. The four lightning talks at EduHPC 2022 cover a range of topics in broadening PDC education: (i) curriculum development efforts for the European Masters in HPC program, (ii) bootcamps for CI professionals who support the running of AI workloads on HPC systems, (iii) a GPU programming course following the Carpentries model and (iv) peer-review assignments to help students write efficient parallel algorithms within sustainable software libraries.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2022
Series
Workshop on Education for High Performance Computing-EduHPC, ISSN 2474-171X
Keywords
computer science education, high performance computing education, Masters curriculum, CI professional training, distance learning, peer review assignments, GPU computing
National Category
Computer Sciences Educational Sciences
Identifiers
urn:nbn:se:kth:diva-326652 (URN)10.1109/EduHPC56719.2022.00011 (DOI)000968684800006 ()2-s2.0-85147953428 (Scopus ID)
Conference
IEEE/ACM International Workshop on Education for High Performance Computing (EduHPC), NOV 13-18, 2022, Dallas, TX
Note

QC 20230508

Available from: 2023-05-08 Created: 2023-05-08 Last updated: 2023-05-08Bibliographically approved
De La Motte, S. A., Hollitt, S. E., Horsley, R., Jackson, P. D., Nakamura, Y., Perlt, H., . . . Zanotti, J. M. (2022). Measurements of SU(3) f symmetry breaking in B meson decay constants. In: Proceedings of Science: . Paper presented at 38th International Symposium on Lattice Field Theory, LATTICE 2021, 26-30 July 2021. Sissa Medialab Srl
Open this publication in new window or tab >>Measurements of SU(3) f symmetry breaking in B meson decay constants
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2022 (English)In: Proceedings of Science, Sissa Medialab Srl , 2022Conference paper, Published paper (Refereed)
Abstract [en]

We present updates from QCDSF/UKQCD/CSSM on the SU(3) f breaking in B meson decay constants. The b-quarks are generated with an anisotropic clover-improved action, and are tuned to match properties of the physical B and B∗ mesons. Configurations are generated with m = 1/3(2ml + ms) kept constant to control symmetry breaking effects. Various sources of systematic uncertainty will be discussed, including those from continuum extrapolations and extrapolations to the physical point. We also present new efforts to calculate fB and fBs using weighted averages across multiple time fitting regions. The use of an automated weighted averaging technique over multiple fitting ranges allows for timely tuning of the b-quark and reduces the impact of systematic errors from fitting range biases in calculations of fB and fBs. 

Place, publisher, year, edition, pages
Sissa Medialab Srl, 2022
Keywords
Bosons, Hadrons, Statistical methods, Systematic errors, B meson decays, B mesons, Breakings, Decay constants, Measurements of, Property, Symmetry breakings, Systematic uncertainties, Weighted averages, Weighted averaging, Extrapolation
National Category
Subatomic Physics
Identifiers
urn:nbn:se:kth:diva-326000 (URN)2-s2.0-85134427733 (Scopus ID)
Conference
38th International Symposium on Lattice Field Theory, LATTICE 2021, 26-30 July 2021
Note

QC 20230421

Available from: 2023-04-21 Created: 2023-04-21 Last updated: 2023-04-21Bibliographically approved
Batelaan, M., Horsley, R., Nakamura, Y., Perlt, H., Pleiter, D., Rakow, P. E., . . . Collaboration, Q.-U. C. (2022). Nucleon Form Factors from the Feynman-Hellmann Method in Lattice QCD. In: Proceedings of Science: . Paper presented at 38th International Symposium on Lattice Field Theory, LATTICE 2021, 26-30 July 2021. Sissa Medialab Srl
Open this publication in new window or tab >>Nucleon Form Factors from the Feynman-Hellmann Method in Lattice QCD
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2022 (English)In: Proceedings of Science, Sissa Medialab Srl , 2022Conference paper, Published paper (Refereed)
Abstract [en]

Lattice QCD calculations of the nucleon electromagnetic form factors are of interest at both the high and low momentum transfer regions. For high momentum transfers especially there are open questions which require more intense study, such as the potential zero crossing in the proton's electric form factor. We will present recent progress from the QCDSF/UKQCD/CSSM collaboration on the calculation of these form factors using the Feynman-Hellmann method in lattice QCD. The Feynman-Hellmann method allows for greater control over excited states which we take advantage of by going to high values of the momentum transfer. In this proceeding we present results of the form factors up to 6 GeV2, using Nf = 2 + 1 flavour fermions for three different pion masses in the range 310-470 MeV. The results are extrapolated to the physical pion mass through the use of a flavour breaking expansion. 

Place, publisher, year, edition, pages
Sissa Medialab Srl, 2022
Keywords
Approximation theory, Hadrons, Momentum, Quantum theory, Electric forms, Electromagnetic form factors, Excited-states, Form factors, Lattice QCD, Lattice QCD calculations, Low momentum transfers, Nucleon form factors, Recent progress, Zero-crossings, Momentum transfer
National Category
Subatomic Physics
Identifiers
urn:nbn:se:kth:diva-325999 (URN)2-s2.0-85134428641 (Scopus ID)
Conference
38th International Symposium on Lattice Field Theory, LATTICE 2021, 26-30 July 2021
Note

QC 20230421

Available from: 2023-04-21 Created: 2023-04-21 Last updated: 2023-04-21Bibliographically approved
Bickerton, J. M., Cooke, A. N., Horsley, R., Nakamura, Y., Perlt, H., Pleiter, D., . . . Zanotti, J. M. (2022). Patterns of flavour symmetry breaking in hadron matrix elements involving u, d and s quarks. In: Proceedings of Science: . Paper presented at 38th International Symposium on Lattice Field Theory, LATTICE 2021, 26-30 July 2021. Sissa Medialab Srl
Open this publication in new window or tab >>Patterns of flavour symmetry breaking in hadron matrix elements involving u, d and s quarks
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2022 (English)In: Proceedings of Science, Sissa Medialab Srl , 2022Conference paper, Published paper (Refereed)
Abstract [en]

Using an SU(3)-flavour symmetry breaking expansion between the strange and light quark masses, we determine how this constrains the extrapolation of baryon octet matrix elements and form factors. In particular we can construct certain combinations, which fan out from the symmetric point (when all the quark masses are degenerate) to the point where the light and strange quarks take their physical values. As a further example we consider the vector amplitude at zero momentum transfer for flavour changing currents.

Place, publisher, year, edition, pages
Sissa Medialab Srl, 2022
Keywords
Element factor, Fan Out, Flavor symmetry, Form factors, Light quarks, Matrix elements, Matrix forms, Quark mass, Symmetrics, Symmetry breakings, Hadrons
National Category
Subatomic Physics
Identifiers
urn:nbn:se:kth:diva-325998 (URN)2-s2.0-85134430300 (Scopus ID)
Conference
38th International Symposium on Lattice Field Theory, LATTICE 2021, 26-30 July 2021
Note

QC 20230421

Available from: 2023-04-21 Created: 2023-04-21 Last updated: 2023-04-21Bibliographically approved
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Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-7296-7817

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