<div dir="ltr">It's hard to tell where the segmentation fault is coming from. Can you use a debugger to generate a backtrace?<div><br></div><div style> ~Jim.</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">
On Wed, Jul 10, 2013 at 11:07 AM, Sufeng Niu <span dir="ltr"><<a href="mailto:sniu@hawk.iit.edu" target="_blank">sniu@hawk.iit.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr"><div><div><div><div>Hello,<br><br></div>I used MPI RMA in my program, but the program stop at the MPI_Win_fence, I have a master process receive data from udp socket. Other processes use MPI_Get to access data.<br>
<br></div>master process:<br><br></div>MPI_Create(...)<br></div><div style="margin-left:40px"><span style="color:rgb(116,27,71)">for(...){<br></span></div><div style="margin-left:40px"><span style="color:rgb(116,27,71)">/* udp recv operation */<br clear="all">
</span></div><div><div><div><div><div><div style="margin-left:40px"><span style="color:rgb(116,27,71)"><br></span></div><div style="margin-left:40px"><span style="color:rgb(116,27,71)">MPI_Barrier // to let other process know data received from udp is ready<br>
<br></span></div><div style="margin-left:40px"><span style="color:rgb(116,27,71)">MPI_Win_fence(0, win);<br></span></div><div style="margin-left:40px"><span style="color:rgb(116,27,71)">MPI_Win_fence(0, win);<br></span></div>
<div><div style="margin-left:40px"><span style="color:rgb(116,27,71)"><br>}</span><br></div><br></div><div>other processes:<br><br></div><div style="margin-left:40px"><span style="color:rgb(116,27,71)">for(...){<br><br></span></div>
<div style="margin-left:40px"><span style="color:rgb(116,27,71)">MPI_Barrier // sync for udp data ready<br><br></span></div><div style="margin-left:40px"><span style="color:rgb(116,27,71)">MPI_Win_fence(0, win);<br><br>
</span></div>
<div style="margin-left:40px"><span style="color:rgb(116,27,71)">MPI_Get();<br></span></div><div style="margin-left:40px"><span style="color:rgb(116,27,71)"><br></span></div><div style="margin-left:40px"><span style="color:rgb(116,27,71)">MPI_Win_fence(0, win); <span style="color:rgb(0,0,0)"><-- program stopped here</span><br>
</span></div><div style="margin-left:40px"><span style="color:rgb(116,27,71)"><br></span></div><div style="margin-left:40px"><span style="color:rgb(116,27,71)">/* other operation */<br></span></div><div style="margin-left:40px">
<span style="color:rgb(116,27,71)">}</span><br></div><div><br></div><div>I found that the program stopped at second MPI_Win_fence, the terminal output is:<br><br><br></div><div><span style="color:rgb(116,27,71)">===================================================================================<br>
= BAD TERMINATION OF ONE OF YOUR APPLICATION PROCESSES<br>= EXIT CODE: 11<br>= CLEANING UP REMAINING PROCESSES<br>= YOU CAN IGNORE THE BELOW CLEANUP MESSAGES<br>===================================================================================<br>
YOUR APPLICATION TERMINATED WITH THE EXIT STRING: Segmentation fault (signal 11)<br>This typically refers to a problem with your application.<br>Please see the FAQ page for debugging suggestions</span><br><br></div><div>
Do you have any suggestions? Thank you very much!<span class="HOEnZb"><font color="#888888"><br>
<br></font></span></div><span class="HOEnZb"><font color="#888888"><div>-- <br>Best Regards,<div>Sufeng Niu</div><div>ECASP lab, ECE department, Illinois Institute of Technology</div><div>Tel: 312-731-7219</div>
</div></font></span></div></div></div></div></div></div>
<br>_______________________________________________<br>
discuss mailing list <a href="mailto:discuss@mpich.org">discuss@mpich.org</a><br>
To manage subscription options or unsubscribe:<br>
<a href="https://lists.mpich.org/mailman/listinfo/discuss" target="_blank">https://lists.mpich.org/mailman/listinfo/discuss</a><br></blockquote></div><br></div>