When I got segmentation faults, it has always been my coding mistakes.  Perhaps your code is not robust against number of processes not divisible by 2?<br><br><div class="gmail_quote">On Wed, Jun 30, 2010 at 8:47 AM, Jack Bryan <span dir="ltr">&lt;<a href="mailto:dtustudy68@hotmail.com">dtustudy68@hotmail.com</a>&gt;</span> wrote:<br>

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<div>Dear All,</div><div><br></div><div>I am using Open MPI, I got the error: </div><div><br></div><div>n337:37664] *** Process received signal ***</div><div>[n337:37664] Signal: Segmentation fault (11)</div><div>[n337:37664] Signal code: Address not mapped (1)</div>

<div>[n337:37664] Failing at address: 0x7fffcfe90000</div><div>[n337:37664] [ 0] /lib64/libpthread.so.0 [0x3c50e0e4c0]</div><div>[n337:37664] [ 1] /lustre/home/rhascheduler/RhaScheduler-0.4.1.1/mytest/nmn2 [0x414ed7]</div>

<div>[n337:37664] [ 2] /lib64/libc.so.6(__libc_start_main+0xf4) [0x3c5021d974]</div><div>[n337:37664] [ 3] /lustre/home/rhascheduler/RhaScheduler-0.4.1.1/mytest/nmn2(__gxx_personality_v0+0x1f1) [0x412139]</div><div>[n337:37664] *** End of error message ***</div>

<div><br></div><div>After searching answers, it seems that some functions fail. </div><div> </div><div>My program can run well for 1,2,10 processors, but fail when the number of tasks cannot</div><div>be divided evenly by number of processes. </div>

<div><br></div><div>Any help is appreciated. </div><div><br></div><div>thanks</div><div><br></div><div>Jack</div><div><br></div><div>June 30  2010</div><div><br></div><div class="hm"> 		 	   		  <br><hr>The New Busy think 9 to 5 is a cute idea. Combine multiple calendars with Hotmail.  <a href="http://www.windowslive.com/campaign/thenewbusy?tile=multicalendar&amp;ocid=PID28326::T:WLMTAGL:ON:WL:en-US:WM_HMP:042010_5" target="_blank">Get busy.</a></div>

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