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<p class="MsoNormal">Dear developers of MPICH,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">I am running MPICH-3.0.4 with a Fortran95-code on a LINUX-cluster using the INTEL-14.0.1 Ftn-compiler.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">In that code I employ the shared memory feature (using MPI_WIN_ALLOCATE_SHARED and MPI_WIN_SHARED_QUERY).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">It works fine, but nevertheless I detected a little bug in MPI_WIN_SHARED_QUERY:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:CMTT10;color:red"> MPI_WIN_SHARED_QUERY(WIN, RANK, SIZE, DISP_UNIT, BASEPTR, IERROR)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:CMTT10;color:red"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">The MPI-3.0 Standard document (chapter 11.2, on p. 410) prescribes that the 4<sup>th</sup> parameter DISP_UNIT is a result from the call of this sbr.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">However, with MPICH no value is returned for DISP_UNIT.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">You can easily test that, by setting DISP_UNIT to a control number ( e.g. DISP_UNIT = -7777 ) just before the call of sbr MPI_WIN_SHARED_QUERY.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Just after that sbr-call the variable DISP_UNIT still contains that control number, but should not.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Greetings<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Michael Rachner<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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