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ParaForming - Patterns and Refactoring for Parallel Programmingkhstandrews
Despite Moore's "law", uniprocessor clock speeds have now stalled. Rather than single processors running at ever higher clock speeds, it is
common to find dual-, quad- or even hexa-core processors, even in consumer laptops and desktops.
Future hardware will not be slightly parallel, however, as in today's multicore systems, but will be
massively parallel, with manycore and perhaps even megacore systems
becoming mainstream.
This means that programmers need to start thinking parallel. To achieve this they must move away
from traditional programming models where parallelism is a
bolted-on afterthought. Rather, programmers must use languages where parallelism is deeply embedded into the programming model
from the outset.
By providing a high level model of computation, without explicit ordering of computations,
declarative languages in general, and functional languages in particular, offer many advantages for parallel
programming.
One of the most fundamental advantages of the functional paradigm is purity.
In a purely functional language, as exemplified by Haskell, there are simply no side effects: it is therefore impossible for parallel computations to conflict with each
other in ways that are not well understood.
ParaForming aims to radically improve the process
of parallelising purely functional programs through a comprehensive set of high-level parallel refactoring patterns for Parallel Haskell,
supported by advanced refactoring tools.
By matching parallel design patterns with appropriate algorithmic skeletons
using advanced software refactoring techniques and novel cost information, we will bridge the gap between fully automatic
and fully explicit approaches to parallelisation, helping programmers "think parallel" in a systematic,
guided way. This talk introduces the ParaForming approach, gives some examples and shows how
effective parallel programs can be developed using advanced refactoring technology.
ParaForming - Patterns and Refactoring for Parallel Programmingkhstandrews
Despite Moore's "law", uniprocessor clock speeds have now stalled. Rather than single processors running at ever higher clock speeds, it is
common to find dual-, quad- or even hexa-core processors, even in consumer laptops and desktops.
Future hardware will not be slightly parallel, however, as in today's multicore systems, but will be
massively parallel, with manycore and perhaps even megacore systems
becoming mainstream.
This means that programmers need to start thinking parallel. To achieve this they must move away
from traditional programming models where parallelism is a
bolted-on afterthought. Rather, programmers must use languages where parallelism is deeply embedded into the programming model
from the outset.
By providing a high level model of computation, without explicit ordering of computations,
declarative languages in general, and functional languages in particular, offer many advantages for parallel
programming.
One of the most fundamental advantages of the functional paradigm is purity.
In a purely functional language, as exemplified by Haskell, there are simply no side effects: it is therefore impossible for parallel computations to conflict with each
other in ways that are not well understood.
ParaForming aims to radically improve the process
of parallelising purely functional programs through a comprehensive set of high-level parallel refactoring patterns for Parallel Haskell,
supported by advanced refactoring tools.
By matching parallel design patterns with appropriate algorithmic skeletons
using advanced software refactoring techniques and novel cost information, we will bridge the gap between fully automatic
and fully explicit approaches to parallelisation, helping programmers "think parallel" in a systematic,
guided way. This talk introduces the ParaForming approach, gives some examples and shows how
effective parallel programs can be developed using advanced refactoring technology.