<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">In a recent exchange with the OSU folks, it was discovered that there is a gap in the MPICH test suite in that the code that tests for the correctness of handling long messages forgets to test that count is handled correctly. This led to the escape of a bug in the MVAPICH code, since corrected. Hari tracked this down and has sent a patch. Could the MPICH team look at this?<div><br></div><div>Thanks,</div><div>Rusty<br><div><br><div>Begin forwarded message:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;"><span style="font-family:'Helvetica'; color:rgba(0, 0, 0, 1.0);"><b>From: </b></span><span style="font-family:'Helvetica';">Hari Subramoni <<a href="mailto:subramoni.1@osu.edu">subramoni.1@osu.edu</a>><br></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;"><span style="font-family:'Helvetica'; color:rgba(0, 0, 0, 1.0);"><b>Subject: </b></span><span style="font-family:'Helvetica';"><b>Re: [lcrc-support #279383] Re: Long messages</b><br></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;"><span style="font-family:'Helvetica'; color:rgba(0, 0, 0, 1.0);"><b>Date: </b></span><span style="font-family:'Helvetica';">October 26, 2015 at 12:19:42 PM CDT<br></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;"><span style="font-family:'Helvetica'; color:rgba(0, 0, 0, 1.0);"><b>To: </b></span><span style="font-family:'Helvetica';">Rusty Lusk <<a href="mailto:lusk@mcs.anl.gov">lusk@mcs.anl.gov</a>><br></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;"><span style="font-family:'Helvetica'; color:rgba(0, 0, 0, 1.0);"><b>Cc: </b></span><span style="font-family:'Helvetica';">"Low, John J." <<a href="mailto:jlow@mcs.anl.gov">jlow@mcs.anl.gov</a>>, Steve Pieper <<a href="mailto:spieper@anl.gov">spieper@anl.gov</a>>, "Wiringa, Robert B." <<a href="mailto:wiringa@anl.gov">wiringa@anl.gov</a>>, "D.K. Panda" <<a href="mailto:panda@cse.ohio-state.edu">panda@cse.ohio-state.edu</a>>, "<a href="mailto:support@lcrc.anl.gov">support@lcrc.anl.gov</a>" <<a href="mailto:support@lcrc.anl.gov">support@lcrc.anl.gov</a>>, "Balaji, Pavan" <<a href="mailto:balaji@anl.gov">balaji@anl.gov</a>><br></span></div><br><div><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><div dir="ltr">Hello All,<div><br></div><div>I was investigating to see how this was missed earlier. <span style="font-size:12.8px"> </span><span style="font-size:12.8px">In our MPICH large-message test (test/mpi/pt2pt/large_message.c) which should've caught this, the code which tests the result of MPI_Get_count was missing.</span></div><div><span style="font-size:12.8px"><br></span></div><div><span style="font-size:12.8px">I was checking the large_message.c test that is shipped with MPICH-3.1.4 (latest stable) and MPICH-3.2rc1 (preview release) available from the MPICH site. Both have the same issue. </span><span style="font-size:12.8px">The large-message-test.patch should fix this.</span></div><div><span style="font-size:12.8px"><br></span></div><div><span style="font-size:12.8px">If the patch looks good, it would be good if this gets applied to MPICH itself so that all MPICH derivatives can benefit from it.</span></div><div><br></div><div>Best Regards,</div><div>Hari.</div></div><div class="gmail_extra"><div class="gmail_quote"></div><br></div>
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