<?xml version="1.0" encoding="utf-8"?>
<TEI xmlns="http://www.tei-c.org/ns/1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:hal="http://hal.archives-ouvertes.fr/" xmlns:gml="http://www.opengis.net/gml/3.3/" xmlns:gmlce="http://www.opengis.net/gml/3.3/ce" version="1.1" xsi:schemaLocation="http://www.tei-c.org/ns/1.0 http://api.archives-ouvertes.fr/documents/aofr-sword.xsd">
  <teiHeader>
    <fileDesc>
      <titleStmt>
        <title>HAL TEI export of hal-01328606</title>
      </titleStmt>
      <publicationStmt>
        <distributor>CCSD</distributor>
        <availability status="restricted">
          <licence target="https://creativecommons.org/publicdomain/zero/1.0/">CC0 1.0 - Universal</licence>
        </availability>
        <date when="2026-05-21T10:22:02+02:00"/>
      </publicationStmt>
      <sourceDesc>
        <p part="N">HAL API Platform</p>
      </sourceDesc>
    </fileDesc>
  </teiHeader>
  <text>
    <body>
      <listBibl>
        <biblFull>
          <titleStmt>
            <title xml:lang="en">A Performance Assessment of the Unified Model</title>
            <author role="aut">
              <persName>
                <forename type="first">Dale</forename>
                <surname>Roberts</surname>
              </persName>
              <email type="md5">08283693703e400261588155ff3b8296</email>
              <email type="domain">anu.edu.au</email>
              <idno type="idhal" notation="numeric">983333</idno>
              <idno type="halauthorid" notation="string">1035182-983333</idno>
              <affiliation ref="#struct-458959"/>
            </author>
            <author role="aut">
              <persName>
                <forename type="first">Mark</forename>
                <surname>Cheeseman</surname>
              </persName>
              <email type="md5">9b3d6352bd621d619e5db0b436f6f4cf</email>
              <email type="domain">anu.edu.au</email>
              <idno type="idhal" notation="numeric">983334</idno>
              <idno type="halauthorid" notation="string">1035183-983334</idno>
              <affiliation ref="#struct-458959"/>
            </author>
            <editor role="depositor">
              <persName>
                <forename>Hal</forename>
                <surname>Ifip</surname>
              </persName>
              <email type="md5">2073ac78024b6e13f2714db96e9b1e63</email>
              <email type="domain">inria.fr</email>
            </editor>
          </titleStmt>
          <editionStmt>
            <edition n="v1" type="current">
              <date type="whenSubmitted">2016-06-08 11:22:22</date>
              <date type="whenModified">2016-06-08 11:34:29</date>
              <date type="whenReleased">2016-06-08 11:34:29</date>
              <date type="whenProduced">2015-03-25</date>
              <date type="whenEndEmbargoed">2018-01-01</date>
              <ref type="file" target="https://inria.hal.science/hal-01328606v1/document">
                <date notBefore="2018-01-01"/>
              </ref>
              <ref type="file" subtype="author" n="1" target="https://inria.hal.science/hal-01328606v1/file/978-3-319-15994-2_56_Chapter.pdf" id="file-1328606-1409462">
                <date notBefore="2018-01-01"/>
              </ref>
            </edition>
            <respStmt>
              <resp>contributor</resp>
              <name key="200187">
                <persName>
                  <forename>Hal</forename>
                  <surname>Ifip</surname>
                </persName>
                <email type="md5">2073ac78024b6e13f2714db96e9b1e63</email>
                <email type="domain">inria.fr</email>
              </name>
            </respStmt>
          </editionStmt>
          <publicationStmt>
            <distributor>CCSD</distributor>
            <idno type="halId">hal-01328606</idno>
            <idno type="halUri">https://inria.hal.science/hal-01328606</idno>
            <idno type="halBibtex">roberts:hal-01328606</idno>
            <idno type="halRefHtml">&lt;i&gt;11th International Symposium on Environmental Software Systems (ISESS)&lt;/i&gt;, Mar 2015, Melbourne, Australia. pp.552-560, &lt;a target="_blank" href="https://dx.doi.org/10.1007/978-3-319-15994-2_56"&gt;&amp;#x27E8;10.1007/978-3-319-15994-2_56&amp;#x27E9;&lt;/a&gt;</idno>
            <idno type="halRef">11th International Symposium on Environmental Software Systems (ISESS), Mar 2015, Melbourne, Australia. pp.552-560, &amp;#x27E8;10.1007/978-3-319-15994-2_56&amp;#x27E9;</idno>
            <availability status="restricted">
              <licence target="https://creativecommons.org/licenses/by/4.0/">CC BY 4.0 - Attribution<ref corresp="#file-1328606-1409462"/></licence>
            </availability>
          </publicationStmt>
          <seriesStmt>
            <idno type="stamp" n="IFIP">IFIP - International Federation for Information Processing</idno>
            <idno type="stamp" n="IFIP-AICT" corresp="IFIP">IFIP Advances in Information and Communication Technology</idno>
            <idno type="stamp" n="IFIP-TC" corresp="IFIP">IFIP Technical Committees </idno>
            <idno type="stamp" n="IFIP-TC5" corresp="IFIP-TC">IFIP TC5: Information Technology Applications</idno>
            <idno type="stamp" n="IFIP-WG" corresp="IFIP">Working Groups</idno>
            <idno type="stamp" n="IFIP-AICT-448" corresp="IFIP-AICT">Environmental Software Systems. Infrastructures, Services and Applications</idno>
            <idno type="stamp" n="IFIP-WG5-11" corresp="IFIP-WG">WG 5.11: Computers and Environment</idno>
            <idno type="stamp" n="IFIP-ISESS" corresp="IFIP">International Symposium on Environmental Software Systems</idno>
          </seriesStmt>
          <notesStmt>
            <note type="commentary">Part 8: High Performance Computing and BigData</note>
            <note type="audience" n="2">International</note>
            <note type="invited" n="0">No</note>
            <note type="popular" n="0">No</note>
            <note type="peer" n="1">Yes</note>
            <note type="proceedings" n="1">Yes</note>
          </notesStmt>
          <sourceDesc>
            <biblStruct>
              <analytic>
                <title xml:lang="en">A Performance Assessment of the Unified Model</title>
                <author role="aut">
                  <persName>
                    <forename type="first">Dale</forename>
                    <surname>Roberts</surname>
                  </persName>
                  <email type="md5">08283693703e400261588155ff3b8296</email>
                  <email type="domain">anu.edu.au</email>
                  <idno type="idhal" notation="numeric">983333</idno>
                  <idno type="halauthorid" notation="string">1035182-983333</idno>
                  <affiliation ref="#struct-458959"/>
                </author>
                <author role="aut">
                  <persName>
                    <forename type="first">Mark</forename>
                    <surname>Cheeseman</surname>
                  </persName>
                  <email type="md5">9b3d6352bd621d619e5db0b436f6f4cf</email>
                  <email type="domain">anu.edu.au</email>
                  <idno type="idhal" notation="numeric">983334</idno>
                  <idno type="halauthorid" notation="string">1035183-983334</idno>
                  <affiliation ref="#struct-458959"/>
                </author>
              </analytic>
              <monogr>
                <title level="m">IFIP Advances in Information and Communication Technology</title>
                <meeting>
                  <title>11th International Symposium on Environmental Software Systems (ISESS)</title>
                  <date type="start">2015-03-25</date>
                  <date type="end">2015-03-27</date>
                  <settlement>Melbourne</settlement>
                  <country key="AU">Australia</country>
                </meeting>
                <editor>Ralf Denzer</editor>
                <editor>Robert M. Argent</editor>
                <editor>Gerald Schimak</editor>
                <editor>Jiří Hřebíček</editor>
                <imprint>
                  <publisher>Springer</publisher>
                  <biblScope unit="serie">Environmental Software Systems. Infrastructures, Services and                    Applications</biblScope>
                  <biblScope unit="volume">AICT-448</biblScope>
                  <biblScope unit="pp">552-560</biblScope>
                  <date type="datePub">2015</date>
                </imprint>
              </monogr>
              <idno type="doi">10.1007/978-3-319-15994-2_56</idno>
            </biblStruct>
          </sourceDesc>
          <profileDesc>
            <langUsage>
              <language ident="en">English</language>
            </langUsage>
            <textClass>
              <keywords scheme="author">
                <term xml:lang="en">high performance computing</term>
                <term xml:lang="en">performance analysis</term>
                <term xml:lang="en">numerical weather prediction</term>
                <term xml:lang="en">unified model</term>
              </keywords>
              <classCode scheme="halDomain" n="info">Computer Science [cs]</classCode>
              <classCode scheme="halTypology" n="COMM">Conference papers</classCode>
              <classCode scheme="halOldTypology" n="COMM">Conference papers</classCode>
              <classCode scheme="halTreeTypology" n="COMM">Conference papers</classCode>
            </textClass>
            <abstract xml:lang="en">
              <p>The Unified Model (UM) is a model produced by the UK MetOffice for Numerical Weather Prediction (NWP) and climate simulation. It is used extensively by various university, government and other research organizations on the large supercomputer hosted at the National Computing Infrastructure (NCI). A 3-year collaboration between NCI, the Australian Bureau of Meteorology and Fujitsu is underway to address performance and scalability issues in the UM on NCI’s supercomputer, Raijin.IO performance in the UM is the most dominant factor in its overall performance. The IO server approach employed is sophisticated and requires proper calibration to achieve acceptable performance. Global synchronization and file lock contention is a problem that can be remedied with simple MPI global collective calls. Complimentary IO strategies, such as MPI-IO and directed IO, are being investigated for implementation.The OpenMP implementation employed in the UM is investigated, and is found to have inefficiencies that are detrimental to the load balance of the model. Only loop-wise parallelism is employed. Due to the inherently imbalanced nature of the model, a task-wise approach could yield improved threading efficiency.</p>
            </abstract>
            <particDesc>
              <org type="consortium">TC 5</org>
              <org type="consortium">WG 5.11</org>
            </particDesc>
          </profileDesc>
        </biblFull>
      </listBibl>
    </body>
    <back>
      <listOrg type="structures">
        <org type="institution" xml:id="struct-458959" status="INCOMING">
          <orgName>National Computational Infrastructure</orgName>
          <desc>
            <address>
              <addrLine>Canberra Australia</addrLine>
              <country key="AU"/>
            </address>
          </desc>
        </org>
      </listOrg>
    </back>
  </text>
</TEI>