The $250 billion global software industry can no longer rely on the steady performance gains that came from simply making processors run faster. For the first time, computer chips are being built with dozens or hundreds of cores that must work in parallel, alongside specialised accelerators for graphics and other tasks—but the programming languages, tools, and design methods from the single-processor era cannot handle this complexity. This Centre for Doctoral Training will produce more than 50 PhD graduates trained to rewrite the fundamental rules of how software is built for these heterogeneous parallel systems. If successful, these experts will transform how every layer of computing works, from the nano-scale internals of a processor to global cloud infrastructure. The impact will be invisible but pervasive: faster medical imaging, more efficient energy grids, smoother supply chains, and software that uses less electricity. Without this shift, the UK risks losing its leadership in computing as the old sequential methods become a bottleneck for every sector that depends on technology.
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The worldwide software market, estimated at $250 billion per annum, faces a disruptive challenge unprecedented since its inception: for performance and energy reasons, parallelism and heterogeneity now pervade every layer of the computing systems infrastructure, from the internals of commodity processors (manycore), through small scale systems (GPGPUs and other accelerators) and on to globally distributed systems (web, cloud). This pervasive parallelism renders the hierarchies, interfaces and methodologies of the sequential era unviable. Heterogeneous parallel hardware requires new methods of compilation for new programming languages supported by new system development strategies. Parallel systems, from nano to global, create difficult new challenges for modelling, simulation, testing and verification. This poses a set of urgent interconnected problems of enormous significance, impacting and disrupting all research and industrial sectors which rely upon computing technology. Our CDT will generate a stream of more than 50 experts, prepared to address these challenges by taking up key roles in academic and industrial research and development labs, working to shape the future of the industry. The research resources and industrial connections available to our CDT make us uniquely well placed within the UK to deliver on these aspirations. The "pervasive parallelism challenge" is to undertake the fundamental research and design required to transform methods and practice across all levels of the ICT infrastructure, in order to exploit these new technological opportunities. Doing so will allow us to raise the management of heterogeneous concurrency and parallelism from a niche activity in the care of experts, to a regularised component of the mainstream. This requires a steady flow of highly educated, highly skilled practitioners, with the ability to relate to opportunities at every level and to communicate effectively with specialists in related areas. These highly skilled graduates must not only have deep expertise in their own specialisms, but crucially, an awareness of relationships to the surrounding computational system. The need for fundamental work on heterogeneous parallelism is globally recognised by diverse interest groups. In the USA, reports undertaken by the Computing Community Consortium and the National Research Council recognise the paradigm shift needed for this technology to be incorporated into research and industry alike. Both these reports were used as fundamental arguments in initiating the call for proposals by the National Science Foundation (NSF) on Exploiting Parallelism and Scalability, in the context of the NSF's Advanced Computing Infrastructure: Vision and Strategic Plan which calls for fundamental research to answer the question of "how to enable the computational systems that will support emerging applications without the benefit of near-perfect performance scaling from hardware improvements." Similarly, the European Union has identified the need for new models of parallelism as part of its Digital Agenda. Under the agenda goals of Cloud Computing and Software and Services, parallelism plays a crucial role and the Commission asserts the need for a deeper understanding and new models of parallel computation that will enable future technology. Given the UK's global leadership status it is imperative that similar questions be posed and answered here.
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