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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">If you have a TotalView debugger, can try to run through the debugger. It is hard to tell if it is a system error or bug in ALPS.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> chipps-bounces@list.coin-or.org [mailto:chipps-bounces@list.coin-or.org]
<b>On Behalf Of </b>???<br>
<b>Sent:</b> 2011</span><span lang="JA" style="font-size:10.0pt">$BG/(B</span><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">11</span><span lang="JA" style="font-size:10.0pt">$B7n(B</span><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">29</span><span lang="JA" style="font-size:10.0pt">$BF|(B</span><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
8:47 </span><span lang="JA" style="font-size:10.0pt">$B>e8a(B</span><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""><br>
<b>To:</b> chipps@list.coin-or.org<br>
<b>Cc:</b> geogrid@gmail.com<br>
<b>Subject:</b> [CHiPPS] Questions About Blis And example of Alps<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-family:"Times New Roman","serif"">Dear Sir,</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Times New Roman","serif"">I am now trying to using Alps solve Ip problems.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Times New Roman","serif"">I have <span style="color:#3333FF">
two questions</span>.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Times New Roman","serif";color:#000099">First</span><span style="font-family:"Times New Roman","serif"">, I solved the knap3(Alps/Alps/Abc/data/knap3.mps) problem using Abc in parallel.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Times New Roman","serif"">It generate good log file. I can see the work each process has done.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Times New Roman","serif"">And we can see that a few hundred nodes are searched.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Times New Roman","serif"">But when I use Blis to solve the same the knap3 problem.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Times New Roman","serif"">When it is solved, the information shows that only on node searched.
</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Times New Roman","serif"">The depth of the search tree is zero.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Times New Roman","serif"">Why is this?</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Times New Roman","serif";color:#000099">Second</span><span style="font-family:"Times New Roman","serif"">, I use Abc to solve a MIP problem(MPS file: 72MB, 75861 rows, 115173 columns, 1417123 elements) in parallel
using 3(2,4 are tried) machines. </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Times New Roman","serif"">But the program goes wrong after more or less 2000 seconds with the put out::</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Times New Roman","serif";color:#990000">Fatal error in MPI_Test: Other MPI error, error stack:</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Times New Roman","serif";color:#990000">0: MPI_Test(153)..................: MPI_Test(request=0x7fffe1cdbdb4, flag=0x7fffe1cdbdb0, status=0x7fffe1cdbd50) failed</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Times New Roman","serif";color:#990000">0: MPIDI_CH3I_Progress(150).......:
</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Times New Roman","serif";color:#990000">0: MPID_nem_mpich2_test_recv(800).:
</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Times New Roman","serif";color:#990000">0: MPID_nem_tcp_connpoll(1720)....:
</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Times New Roman","serif";color:#990000">0: state_commrdy_handler(1556)....:
</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Times New Roman","serif";color:#990000">0: MPID_nem_tcp_recv_handler(1446): socket closed</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Times New Roman","serif";color:#990000">rank 0 in job 5 vm3-1_33710 caused collective abort of all ranks</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Times New Roman","serif";color:#990000"> exit status of rank 0: return code 1</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Times New Roman","serif"">Could you tell me why?</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Times New Roman","serif""> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Times New Roman","serif"">Thanks a lot!</span><o:p></o:p></p>
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