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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hello MPICH2 users and developers,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I did some more tests on a Windows XP 32bit machine with MPICH2 32bit and MinGW 32bit compilers. The code in my previous email failed when calling MPI_Allreduce in fortran. So here are the results:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='mso-list:Ignore'>1.<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>Works on Linux (Ubuntu 11.10) and OS X (thanks to Rajeev Thakur’s email). But fail on Windows xp 32bit and Windows 7 64bit (running the 32bit code).<o:p></o:p></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='mso-list:Ignore'>2.<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>No problem if the matrix is much smaller (e.g. 10x10x10 matrix).<o:p></o:p></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='mso-list:Ignore'>3.<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>Works if not using MPI_IN_PLACE.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>So I guess it could be a MPI_IN_PLACE problem happened in the windows version fortran functions.<o:p></o:p></p><p class=MsoNormal>Or it could be the problem of MinGW?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>The c code works fine. And in c version MPI_IN_PLACE = 0xffffffff but fortran version MPI_IN_PLACE is 0. I can’t tell whether they should be different since I don’t know how does it implemented.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Please help me out! Thanks.<o:p></o:p></p><p class=MsoNormal>Y L<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>