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Lorenzo Piarulli

dblp:415/4806 · DBLP profile ↗
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1ranked-venue papers
0as first author
1since 2021 · last 2025
0009-0006-8071-8806ORCID · reported

Domains — the database's venue-derived domains; a paper can count in several

Systems, architecture and hardware · 1 · 1 since 2021

Expertise — from the expertise taxonomy: the topics of the expert's papers under the CCF categories. A weight counts papers with recency: 1 for a paper about the topic, 0.3 when the topic is its context, halved every five years.

Computer architecture, parallel and distributed computing, and storage systems
1 paper
Interconnection networks and networks-on-chip · 62% High-performance computing · 38%

Topics — the 4 heaviest of 4, each with the papers that count most for it

TopicWeightPapersLastEvidence papers
High-performance computing
collective communication
0.912025
Bine Trees: Enhancing Collective Operations by Optimizing Communication Locality · SC 2025
Interconnection networks and networks-on-chip
communication locality
0.912025
Bine Trees: Enhancing Collective Operations by Optimizing Communication Locality · SC 2025
Interconnection networks and networks-on-chip › network topology › low-diameter topology
dragonfly network
0.312025
Bine Trees: Enhancing Collective Operations by Optimizing Communication Locality · SC 2025
Interconnection networks and networks-on-chip
network topology
0.312025
Bine Trees: Enhancing Collective Operations by Optimizing Communication Locality · SC 2025
YearPublicationVenuePosition
2025 Bine Trees: Enhancing Collective Operations by Optimizing Communication Locality
abstract
Communication locality plays a key role in the performance of collective operations on large HPC systems, especially on oversubscribed networks where groups of nodes are fully connected internally but sparsely linked through global connections. We present Bine (binomial negabinary) trees, a family of collective algorithms that improve communication locality. Bine trees maintain the generality of binomial trees and butterflies while cutting global-link traffic by up to \(33\%\). We implement eight Bine-based collectives and evaluate them on four large-scale supercomputers with Dragonfly, Dragonfly+, oversubscribed fat-tree, and torus topologies, achieving up to 5 × speedups and consistent reductions in global-link traffic across different vector sizes and node counts.
Daniele De Sensi, Saverio Pasqualoni, Lorenzo Piarulli, Tommaso Bonato, Seydou Ba, Matteo Turisini, Jens Domke, Torsten Hoefler
SC3