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PhD Studentship: Runtime Performance and Energy Optimisation of Massively Parallel Asynchronous Systems

University of Southampton

Qualification Type: PhD
Location: Southampton
Funding for: UK Students, EU Students
Funding amount: £15,009 tax-free enhanced stipend per annum
Hours: Full Time
Placed On: 15th February 2020
Closes: 31st August 2020
 

Supervisor: Prof Andrew Brown

Co-supervisor Dr Graeme Bragg

Project description

POETS - Partial Ordered Event Triggered Systems - technology is based on the idea of an extremely large number (millions) of small cores, embedded in a fast, bespoke, hardware, parallel communications infrastructure - the core mesh. Inter-core communication is asynchronous, and effected by small, fixed size, hardware data packets (a few bytes) - messages. For an important set of industrial problems, POETS architectures are capable of delivering orders of magnitude speed increases at significantly lower power levels. This project is about accelerating a simulation application using POETS.

Energy used by computing is currently estimated to account for 8% of the global electricity supply and recent predictions have suggested that datacentres will consume 20% by 2025. One way in which this problem is being addressed is through significant research into techniques for the management of contemporary multi-core and distributed HPC systems that reduce energy while maintaining application performance. Common techniques include, but are not limited to, power gating, where unused parts of a system are turned off to reduce static energy; task mapping, to efficiently use available hardware resources and facilitate other management techniques; and dynamic Voltage-frequency selection (DVFS), where the operating frequency and core voltage are varied during runtime to reduce dynamic energy.

State-of-the-art techniques can reduce the energy required to execute an application by upwards of 40% while significantly reducing idle power dissipation compared to using no management. Runtime management has also found its way into the consumer space with personal computers implementing DVFS by default and many mobile devices exploiting heterogeneous system architectures that mix energy-efficient and high-performance processing cores.

While the POETS architecture is intended to reduce power through its design, the application of management techniques that improve energy efficiency to achieve even greater savings of event-driven asynchronous many-core massively-parallel systems is a largely unexplored area that is essential to the ongoing maturation of these systems.

The objective of this project is to investigate and assess the applicability of existing state-of-the art system optimisation methods to POETS-like systems, which in turn will inform the design of novel optimisation methods.

POETS Website

If you wish to discuss any details of the project informally, please contact Dr Graeme Bragg or Professor Andrew Brown, Sustainable Electronic Technologies (SET)Research Group, Email: gmb@ecs.soton.ac.uk / adb@ecs.soton.ac.uk  Tel: +44 (0) 2380 593374

Entry Requirements

A very good undergraduate degree (at least a UK 2:1 honours degree, or its international equivalent).

Closing date: applications should be received no later than 31 August 2020 for standard admissions, but later applications may be considered depending on the funds remaining in place.

Funding: full tuition plus, for UK students, an enhanced stipend of £15,009 tax-free per annum for up to 3.5 years.

How To Apply

Applications should be made online here selecting PhD Electrical and Electronic Engineering (Full time)  as the programme. Please enter Andrew Brown under the proposed supervisor.

Applications should include:

Research Proposal

Curriculum Vitae

Two reference letters

Degree Transcripts to date

For further information please contact: feps-pgr-apply@soton.ac.uk

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