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  <doc>
    <id>3202</id>
    <completedYear/>
    <publishedYear>2017</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>727</pageFirst>
    <pageLast>745</pageLast>
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    <issue/>
    <volume>99</volume>
    <type>article</type>
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    <publishedDate>2017-01-10</publishedDate>
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    <title language="eng">The READEX formalism for automatic tuning for energy efficiency</title>
    <abstract language="eng">Energy efficiency is an important aspect of future exascale systems, mainly due to rising energy cost. Although High performance computing (HPC) applications are compute centric, they still exhibit varying computational characteristics in different regions of the program, such as compute-, memory-, and I/O-bound code regions. Some of today’s clusters already offer mechanisms to adjust the system to the resource requirements of an application, e.g., by controlling the CPU frequency. However, manually tuning for improved energy efficiency is a tedious and painstaking task that is often neglected by application developers. The European Union’s Horizon 2020 project READEX (Runtime Exploitation of Application Dynamism for Energy-efficient eXascale computing) aims at developing a tools-aided approach for improved energy efficiency of current and future HPC applications. To reach this goal, the READEX project combines technologies from two ends of the compute spectrum, embedded systems and HPC, constituting a split design-time/runtime methodology. From the HPC domain, the Periscope Tuning Framework (PTF) is extended to perform dynamic auto-tuning of fine-grained application regions using the systems scenario methodology, which was originally developed for improving the energy efficiency in embedded systems. This paper introduces the concepts of the READEX project, its envisioned implementation, and preliminary results that demonstrate the feasibility of this approach.</abstract>
    <parentTitle language="eng">Computing</parentTitle>
    <identifier type="doi">10.1007/s00607-016-0532-7</identifier>
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    <author>Joseph Schuchart</author>
    <author>Michael Gerndt</author>
    <author>Per Gunnar Kjeldsberg</author>
    <author>Kai Diethelm</author>
    <author>Michael Lysaght</author>
    <author>David Horák</author>
    <author>Lubomír Říha</author>
    <author>Andreas Gocht</author>
    <author>Mohammed Sourouri</author>
    <author>Madhura Kumaraswamy</author>
    <author>Anamika Chowdhury</author>
    <author>Magnus Jahre</author>
    <author>Othman Bouizi</author>
    <author>Umbreen Sabir Mian</author>
    <author>Jakub Kružík</author>
    <author>Radim Sojka</author>
    <author>Martin Beseda</author>
    <author>Venkatesh Kannan</author>
    <author>Zakaria Bendifallah</author>
    <author>Daniel Hackenberg</author>
    <author>Wolfgang E. Nagel</author>
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  <doc>
    <id>3216</id>
    <completedYear/>
    <publishedYear>2020</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>113</pageFirst>
    <pageLast>126</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>bookpart</type>
    <publisherName>Springer</publisherName>
    <publisherPlace>Cham</publisherPlace>
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    <belongsToBibliography>1</belongsToBibliography>
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    <title language="eng">Run-Time Exploitation of Application Dynamism for Energy-Efficient Exascale Computing</title>
    <abstract language="eng">As in the embedded systems domain, energy efficiency has recently become one of the main design criteria in high performance computing. The European Union Horizon 2020 project READEX (Run-time Exploitation of Application Dynamism for Energy-efficient eXascale computing) has developed a tools-aided auto-tuning methodology inspired by system scenario based design. Applying similar concepts as those presented in earlier chapters of this book, the dynamic behavior of HPC applications is exploited to achieve improved energy efficiency and performance. Driven by a consortium of European experts from academia, HPC resource providers, and industry, the READEX project has developed the first generic framework of its kind for split design-time and run-time tuning while targeting heterogeneous systems at the Exascale level. Using a real-life boundary element application, energy savings of more than 30% can be shown.</abstract>
    <parentTitle language="eng">System-Scenario-based Design Principles and Applications</parentTitle>
    <identifier type="doi">10.1007/978-3-030-20343-6_6</identifier>
    <identifier type="isbn">978-3-030-20342-9</identifier>
    <identifier type="isbn">978-3-030-20343-6</identifier>
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    <author>Per Gunnar Kjeldsberg</author>
    <author>Robert Schöne</author>
    <author>Michael Gerndt</author>
    <author>Kai Diethelm</author>
    <author>Lubomír Říha</author>
    <author>Venkatesh Kannan</author>
    <author>Marie-Christine Sawley</author>
    <author>Jan Zapletal</author>
    <author>Andreas Gocht</author>
    <author>Nico Reissmann</author>
    <author>Ondrei Vysocky</author>
    <author>Madhura Kumaraswamy</author>
    <author>Wolfgang E. Nagel</author>
    <collection role="institutes" number="fang">Fakultät für angewandte Natur- und Geisteswissenschaften</collection>
  </doc>
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