<div dir="ltr"><div><div><div>Hi,<br><br></div>Note also that sometime, for unknown reason, mpiexec does not work correctly on certain platforms and you should use instead mpiexec.mpich2<br></div>That has solved the problem for me few months ago.<br>
<br>++<br></div>JC<br></div><div class="gmail_extra"><br><br><div class="gmail_quote">2014-06-10 19:32 GMT+02:00 <span dir="ltr"><<a href="mailto:nek5000-users@lists.mcs.anl.gov" target="_blank">nek5000-users@lists.mcs.anl.gov</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">You seem to be running on a single proc. You have to start the program using one one of the scripts<div>
<br></div><div>nekmpi</div><div><br></div><div>or</div><div><br></div><div>nekbmpi</div><div><br></div>
<div>E.g.</div><div><br></div><div>nekmpi jobname 4</div><div><br></div><div>to run with 4 procs.</div><div><br></div><div>praveen</div><div><div class="h5"><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Jun 10, 2014 at 7:23 PM, <span dir="ltr"><<a href="mailto:nek5000-users@lists.mcs.anl.gov" target="_blank">nek5000-users@lists.mcs.anl.gov</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Dear users,<br>
<br>
I am trying to simulate the flow past a cylinder. If I run my simulation with lelt=2000, lelg=2000 in 1 processor, everything works fine. However, if I increase the resolution to lelt=4200 I get a compilation error.<br>
<br>
Following this post:<br>
<br>
<a href="http://lists.mcs.anl.gov/pipermail/nek5000-users/2013-April/002101.html" target="_blank">http://lists.mcs.anl.gov/<u></u>pipermail/nek5000-users/2013-<u></u>April/002101.html</a><br>
<br>
I have seen that if I use more processors, the code compiles fine.<br>
<br>
However, now I am not able to run the code using 4 processors. I get the following error:<br>
<br>
Number of processors: 1<br>
REAL wdsize : 8<br>
INTEGER wdsize : 4<br>
<br>
<br>
Beginning session:<br>
/SL/nek5_svn/test/cyl/cyl.rea<br>
<br>
<br>
timer accuracy: 1.1920929E-07 sec<br>
<br>
read .rea file<br>
<br>
<br>
Beginning session:<br>
/SL/nek5_svn/test/cyl/cyl.rea<br>
<br>
<br>
timer accuracy: 9.5367432E-08 sec<br>
<br>
read .rea file<br>
nelgt/nelgv/lelt: 4425 4425 2000<br>
lx1 /lx2 /lx3 : 5 5 5<br>
<br>
<br>
ABORT: Problem size too large!<br>
<br>
This solver has been compiled for:<br>
number of elements/proc (lelt): 2000<br>
total number of elements (lelg): 5000<br>
<br>
Recompile with the following SIZE parameters:<br>
lelt >= 4425 for np = 1<br>
lelg >= 4425<br>
<br>
<br>
<br>
I have a 3d mesh with 4425 elemnts. In the SIZE file I have set:<br>
<br>
<br>
parameter (ldim=3)<br>
parameter (lx1=5,ly1=lx1,lz1=lx1,lelt=<u></u>2000,lelv=lelt)<br>
parameter (lxd=(3*lx1)/2,lyd=lxd,lzd=<u></u>lxd)<br>
parameter (lelx=1,lely=lelx,lelz=lely)<br>
<br>
parameter (lx2=lx1-0) ! Pressure array dimensions<br>
parameter (ly2=ly1-0)<br>
parameter (lz2=lz1-0)<br>
<br>
parameter (lx3=lx2)<br>
parameter (ly3=ly2)<br>
parameter (lz3=lz2)<br>
<br>
parameter (lp = 4) ! Max # processors<br>
parameter (lelg = 5000) ! Max # elements, total<br>
<br>
parameter (lzl=3 + 2*(ldim-3))<br>
<br>
I have tried to follow this post to solve the problem, but I couldn't:<br>
<br>
<a href="https://lists.mcs.anl.gov/mailman/htdig/nek5000-users/2013-December/002411.html" target="_blank">https://lists.mcs.anl.gov/<u></u>mailman/htdig/nek5000-users/<u></u>2013-December/002411.html</a><br>
<br>
Could you help me, please?<br>
<br>
Regards,<br>
<br>
SL<br>
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</blockquote></div><br></div></div></div></div>
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<br></blockquote></div><br><br clear="all"><br>-- <br><div dir="ltr">Jean-Christophe Loiseau<br><a href="https://sites.google.com/site/loiseaujc/" target="_blank">Homepage</a><br></div>
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