Ernst Gunnar Gran
Adjunct Senior Research Scientist
- Department
- High Performance Computing
- Organisation
- Simula Research Laboratory
- Research Interests
- Interconnection networks Congestion Management High Performance Computing Cloud Computing Resource Management Test-bed Architectures

- ernstgr@simula.no
Publications
2022
Proceedings, refereed
J. Rocher-Gonzalez, E. G. Gran, S. Reinemo, T. Skeie, J. Escudero-Sahuquillo, P. J. García and F. J. Quiles
Adaptive Routing in InfiniBand Hardware
The 22nd IEEE/ACM International Symposium on Cluster, Cloud and Internet Computing
2021
Journal Articles
M. Lee, J. Lin and E. G. Gran
DistTune: Distributed Fine-Grained Adaptive Traffic Speed Prediction for Growing Transportation Networks
Transportation Research Record: Journal of the Transportation Research Board
Proceedings, refereed
M. Lee, J. Lin and E. G. Gran
SALAD: Self-Adaptive Lightweight Anomaly Detection for Real-time Recurrent Time Series
2021 IEEE 45th Annual Computers, Software, and Applications Conference (COMPSAC)
M. Lee, J. Lin and E. G. Gran
How Far Should We Look Back to Achieve Effective Real-Time Time-Series Anomaly Detection?
Advanced Information Networking and Applications
2020
Proceedings, refereed
M. Lee, J. Lin and E. G. Gran
RePAD: Real-Time Proactive Anomaly Detection for Time Series
Advanced Information Networking and Applications
M. Lee, J. Lin and E. G. Gran
ReRe: A Lightweight Real-time Ready-to-Go Anomaly Detection Approach for Time Series
IEEE 44th Annual Computers, Software, and Applications Conference
M. Lee, J. Lin and E. G. Gran
Distributed Fine-Grained Traffic Speed Prediction for Large-Scale Transportation Networks Based on Automatic LSTM Customization and Sharing
Euro-Par 2020: 26th International Conference on Parallel and Distributed Computing
2019
Proceedings, refereed
T. Dreibholz, S. Mazumdar, F. Zahid, A. Taherkordi and E. G. Gran
Mobile Edge as Part of the Multi-Cloud Ecosystem: A Performance Study
Proceedings of the 27th Euromicro International Conference on Parallel, Distributed and Network-Based Processing (PDP)
2018
Journal Articles
E. Tasoulas, F. Zahid, E. G. Gran, K. Begnum, B. D. Johnsen and T. Skeie
Efficient Routing and Reconfiguration in Virtualized HPC Environments with vSwitch-enabled Lossless Networks
Concurrency and Computation: Practice and Experience
F. Zahid, A. Taherkordi, E. G. Gran, T. Skeie and B. D. Johnsen
A Self-Adaptive Network for HPC Clouds: Architecture, Framework, and Implementation
IEEE Transactions on Parallel and Distributed Systems
2017
Journal Articles
R. Peñaranda, M. E. Gómez, P. Lopez, E. G. Gran and T. Skeie
A Fault-Tolerant Routing Strategy for KNS Topologies Based on Intermediate Nodes
Concurrency and Computation: Practice and Experience
2016
Journal Articles
F. Zahid, E. G. Gran, B. Bogdanski, B. D. Johnsen, T. Skeie and E. Tasoulas
Compact Network Reconfiguration in Fat-Trees
The Journal of Supercomputing
F. Zahid, E. G. Gran, B. Bogdanski, B. D. Johnsen and T. Skeie
Efficient Network Isolation and Load Balancing in Multi-Tenant HPC Clusters
Journal of Future Generation Computer Systems
Patents
F. Zahid, E. G. Gran, B. Bogdanski and B. D. Johnsen
System and method for supporting efficient load-balancing in a high performance computing (HPC) environment
F. Zahid, E. G. Gran, B. Bogdanski and B. D. Johnsen
System and method for supporting partition-aware routing in a multi-tenant cluster environment
F. Zahid, E. G. Gran, B. Bogdanski and B. D. Johnsen
System and method for efficient network reconfiguration in fat-trees
E. Tasoulas, B. D. Johnsen and E. G. Gran
Systems and Method for Providing a Dynamic Cloud with Subnet Administration (SA) Query Caching
E. Tasoulas, B. D. Johnsen and E. G. Gran
System and Method for Providing an InfiniBand SR-IOV vSwitch Architecture for a High Performance Cloud Computing Environment
B. Bogdanski, B. D. Johnsen, F. Zahid and E. G. Gran
System and method for efficient network reconfiguration in fat-trees
Proceedings, refereed
R. Peñaranda, E. G. Gran, T. Skeie, M. E. Gómez and P. Lopez
A New Fault-Tolerant Routing Methodology for KNS Topologies
2nd IEEE International Workshop on High-Performance Interconnection Networks in the Exascale and Big-Data Era (HiPINEB)
Q. Liu, R. D. Russell and E. G. Gran
Improvements to the InfiniBand Congestion Control Mechanism
24th Annual Symposium on High-Performance Interconnects (HotI)
F. Zahid, E. G. Gran and T. Skeie
Realizing a Self-Adaptive Network Architecture for HPC Clouds
The International Conference for High Performance Computing, Networking, Storage and Analysis (SC '16) Doctoral Showcase
E. Tasoulas, E. G. Gran, T. Skeie and B. D. Johnsen
Fast Hybrid Network Reconfiguration for Large-Scale Lossless Interconnection Networks
15th IEEE International Symposium on Network Computing and Applications (NCA 2016)
Talks, invited
T. Skeie, E. Tasoulas, F. Zahid, E. G. Gran and J. Camacho
About Management of Exascale Systems
ExaComm 2016, Frankfurt
2015
Journal Articles
J. Escudero-Sahuquillo, E. G. Gran, P. J. Garcia, J. Flich, T. Skeie, O. Lysne, F. J. Quiles and J. Duato
Efficient and Cost-Effective Hybrid Congestion Control for HPC Interconnection Networks
IEEE Transactions on Parallel and Distributed Systems
Proceedings, refereed
F. Zahid, E. G. Gran, B. Bogdanski, B. D. Johnsen and T. Skeie
A weighted fat-tree routing algorithm for efficient load-balancing in InfiniBand enterprise clusters
Proceedings of the 23rd Euromicro International Conference on Parallel, Distributed Network-based Processing (PDP 2015)
F. Zahid, E. G. Gran, B. Bogdanski, B. D. Johnsen and T. Skeie
Partition-aware routing to improve network isolation in InfiniBand based multi-tenant clusters
15th IEEE/ACM International Symposium on Cluster, Cloud and Grid Computing (CCGrid)
F. Zahid, E. G. Gran, B. Bogdanski, B. D. Johnsen and T. Skeie
SlimUpdate: Minimal Routing Update for Performance-based Reconfigurations in Fat-Trees
1st IEEE International Workshop on High-Performance Interconnection Networks Towards the Exascale and Big-Data Era (HiPINEB 2015)
E. Tasoulas
A Novel Query Caching Scheme for Dynamic InfiniBand Subnets
15th IEEE/ACM International Symposium on Cluster, Cloud and Grid Computing (CCGrid)
E. Tasoulas
Towards the InfiniBand SR-IOV vSwitch Architecture
IEEE Cluster 2015
Public outreach
F. Zahid, E. G. Gran and T. Skeie
A Self-adaptive network architecture for InfiniBand based HPC clouds
Talk at 7th Cloud Control Workshop
2014
Journal Articles
E. G. Gran, T. Dreibholz and A. Kvalbein
NorNet Core - A Multi-Homed Research Testbed
Computer Networks
Posters
T. Dreibholz, H. V. Simonsen and E. G. Gran
A Demonstration of the NorNet Core Research Testbed for Multi-Homed Systems
Public outreach
Grønnere Cloud Computing
MediaPlanet addition to Finansavisen
Talks, invited
T. Skeie and E. G. Gran
Efficient and Robust Architecture for Big Data Cloud
Hemavan, Sweden
PhD Thesis
E. G. Gran
Congestion Management in Lossless Interconnection Networks
2013
Proceedings, refereed
T. Dreibholz and E. G. Gran
Design and Implementation of the NorNet Core Research Testbed for Multi-Homed Systems
Proceedings of the 3nd International Workshop on Protocols and Applications with Multi-Homing Support (PAMS)
2012
Journal Articles
B. Bogdanski, S. Reinemo, F. O. Sem-Jacobsen and E. G. Gran
SFtree: a Fully Connected and Deadlock Free Switch-to-Switch Routing Algorithm for Fat-Trees
ACM Transactions on Architecture and Code Optimization
Proceedings, refereed
E. G. Gran, S. Reinemo, O. Lysne, T. Skeie, E. Zahavi and G. Shainer
Exploring the Scope of the InfiniBand Congestion Control Mechanism
2012 IEEE International Symposium on Parallel & Distributed Processing (IPDPS)
2011
Talks, contributed
S. Reinemo, E. G. Gran, T. Skeie and O. Lysne
InfiniBand Congestion Control
Contributed talk at the 2011 OpenFabrics International Workshop, Monterey, USA
Proceedings, refereed
E. G. Gran and S. Reinemo
InfiniBand Congestion Control, Modelling and Validation
4th International ICST Conference on Simulation Tools and Techniques (SIMUTools2011, OMNeT++ 2011 Workshop)
J. Escudero-Sahuquillo, E. G. Gran, P. J. García, J. Flich, T. Skeie, O. Lysne, F. J. Quiles and J. Duato
Combining Congested-Flow Isolation and Injection Throttling in HPC Interconnection Networks
International Conference on Parallel Processing, ICPP 2011
E. G. Gran, E. Zahavi, S. Reinemo, T. Skeie, G. Shainer and O. Lysne
On the Relation Between Congestion Control, Switch Arbitration and Fairness
11th IEEE/ACM International Symposium on Cluster, Cloud, and Grid Computing (CCGrid 2011)
2010
Talks, contributed
S. Reinemo, E. G. Gran, M. Eimot, T. Skeie, O. Lysne, L. P. Huse and G. Shainer
First Experiences With Congestion Control in InfiniBand Hardware
Invited talk at the HPC Advisory Council Switzerland Workshop 2010
Proceedings, refereed
E. G. Gran, M. Eimot, S. Reinemo, T. Skeie, O. Lysne, L. P. Huse and G. Shainer
First Experiences With Congestion Control in InfiniBand Hardware
2010 IEEE International Symposium on Parallel & Distributed Processing (IPDPS)
2009
Talks, contributed
E. G. Gran
First Experiences With Congestion Control in InfiniBand Hardware
Invited talk at the Mellanox booth at Supercomputing 2009, Portland, USA
2008
Proceedings, refereed
E. G. Gran and S. Reinemo
Dragon Kill Points: Loot Distribution in Massive Multiplayer Online Role Playing Games
Proceedings of the 7th ACM SIGCOMM workshop on Network and system support for games (NetGames 2008)