Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

All eyes on the conductor

16.02.2016

A ‘conductor’ that ensures simultaneous processing tasks keep time could dramatically increase the efficiency of ‘cloud’ simulations.

In large-scale simulations that involve simultaneous computational tasks on distributed computers, the overall speed of the simulation is limited by the slowest link. By adaptively redistributing computational resources in real-time according to workload, a Singapore-based research team have shown how to overcome this ‘slowest link’ limitation[1].


Copyright : W.Rebel via Wikimediacommons [https://commons.wikimedia.org/wiki/File:BinaryData50.png]

This approach could dramatically improve the speed and efficiency of simulations conducted across many computers — also called ‘cloud’ simulations.

“The problem of workload imbalance is very common in large-scale simulations, which involve a group of parallel distributed computers or ‘components’ that need to synchronize with each other to ensure that all simulation events are executed in time stamp order,” explains research leader Zengxiang Li, from the A*STAR Institute of High Performance Computing.

Parallel computing simulations involve a large number of events that must occur in order. These events are assigned to multiple parallel computing ‘nodes’ for simultaneous computation. When an event is processed, new events may be generated and inserted into the event processing queue. It is wasteful to let expensive computational resources lie idle waiting for work, so parallel processing schemes often allow each node to process events sequentially without waiting for events from other nodes.

The problem is that if events from one node are late, the other nodes proceeding with their ‘optimistic’ execution of the next event will need to discard their extra work and rollback to where the late node left off. “The entire simulation execution is held back by the slowest components,” says Li, “while faster components risk wasting time and resources on overoptimistic execution and execution rollbacks.”

To improve the efficiency of such simulations, Li and his colleagues developed a resource-conducting scheme called Adaptive Resource Provisioning Mechanism in Virtual Execution Environments, or ArmVee. This scheme sits transparently as middleware in the simulation environment to monitor workloads and task completion speeds on each node in real-time. ArmVee then dynamically reallocates resources, such as memory and processing cycles, to speed up the slowest links.

“We use a self-adaptive auto-regressive-moving-average model — commonly used in control theory — to capture the relationship between simulation performance and resources,” says Li. “This allows ArmVee to predict the dynamically changing simulation workload and to align the execution speeds of simulation components proactively so that each advances in simulation time with comparable speed.”

Importantly, ArmVee can be used transparently in standard simulation architectures without any simulation recoding or interruption. This makes it ready for implementation in standard parallel and distributed simulations.

The A*STAR-affiliated researchers contributing to this research are from the Institute of High Performance Computing

Reference

[1] Li, Z., Cai, W., Turner, S. J., Li, X., Duong, T. N. B., Goh, R. S. M. Adaptive resource provisioning mechanism in VEEs for improving performance of HLA-based simulations. ACM Transactions on Modeling and Computer Simulation 26, 1 (2015).


Associated links
Original article from Agency for Science, Technology and Research

A*STAR Research | Research SEA
Further information:
http://www.researchsea.com

More articles from Information Technology:

nachricht Drones shown to make traffic crash site assessments safer, faster and more accurate
17.01.2019 | Purdue University

nachricht Next generation photonic memory devices are light-written, ultrafast and energy efficient
15.01.2019 | Eindhoven University of Technology

All articles from Information Technology >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Ten-year anniversary of the Neumayer Station III

The scientific and political community alike stress the importance of German Antarctic research

Joint Press Release from the BMBF and AWI

The Antarctic is a frigid continent south of the Antarctic Circle, where researchers are the only inhabitants. Despite the hostile conditions, here the Alfred...

Im Focus: Ultra ultrasound to transform new tech

World first experiments on sensor that may revolutionise everything from medical devices to unmanned vehicles

The new sensor - capable of detecting vibrations of living cells - may revolutionise everything from medical devices to unmanned vehicles.

Im Focus: Flying Optical Cats for Quantum Communication

Dead and alive at the same time? Researchers at the Max Planck Institute of Quantum Optics have implemented Erwin Schrödinger’s paradoxical gedanken experiment employing an entangled atom-light state.

In 1935 Erwin Schrödinger formulated a thought experiment designed to capture the paradoxical nature of quantum physics. The crucial element of this gedanken...

Im Focus: Nanocellulose for novel implants: Ears from the 3D-printer

Cellulose obtained from wood has amazing material properties. Empa researchers are now equipping the biodegradable material with additional functionalities to produce implants for cartilage diseases using 3D printing.

It all starts with an ear. Empa researcher Michael Hausmann removes the object shaped like a human ear from the 3D printer and explains:

Im Focus: Elucidating the Atomic Mechanism of Superlubricity

The phenomenon of so-called superlubricity is known, but so far the explanation at the atomic level has been missing: for example, how does extremely low friction occur in bearings? Researchers from the Fraunhofer Institutes IWM and IWS jointly deciphered a universal mechanism of superlubricity for certain diamond-like carbon layers in combination with organic lubricants. Based on this knowledge, it is now possible to formulate design rules for supra lubricating layer-lubricant combinations. The results are presented in an article in Nature Communications, volume 10.

One of the most important prerequisites for sustainable and environmentally friendly mobility is minimizing friction. Research and industry have been dedicated...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Our digital society in 2040

16.01.2019 | Event News

11th International Symposium: “Advanced Battery Power – Kraftwerk Batterie” Aachen, 3-4 April 2019

14.01.2019 | Event News

ICTM Conference 2019: Digitization emerges as an engineering trend for turbomachinery construction

12.12.2018 | Event News

 
Latest News

Scientists discover new 'architecture' in corn

21.01.2019 | Life Sciences

Broadband achromatic metalens focuses light regardless of polarization

21.01.2019 | Physics and Astronomy

Nuclear actin filaments determine T helper cell function

21.01.2019 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>