| mabinty |
September 28, 2011 12:06 |
modified code crashes in parallel
Dear all!
I modified a code (chtMRF) and it runs without problems on a single CPU. At the moment I parallelize (here on 4 CPUs), it crashes in the first time step (error message see below).
What I did is I introduced a source for the energy equation of region1 (last line):
Code:
tmp<fvScalarMatrix> TEqn
(
fvm::ddt(rho*cp, T)
- fvm::laplacian(K, T)
- fvc::div(fvc::interpolate(Qr)*mesh.magSf())
);
where Qr is created as volScalarField(IOobject()) in "region1" and initialized with zero. In order to update the boundary field of Qr from "region0" according to a certain condition, I added the following before the energy equation is solved:
Code:
if(condition)
{
Qr.boundaryField()[patchID] == QrRegion0.boundaryField()[patchID];
}
The solver crashes at the moment the energy equation of "region1" (modified one) is solved. Thus I assume that Qr is not "fully" updated from all CPUs. I m not sure if thats the problem but e.g. for the sum of a scalar value there is something like the "reduce" function which collects the value from all CPUs. Does somebody have an idea how i could avoid this problem??
I greatly appreciate your comments!!
Cheers,
Aram
#################################################
Quote:
Solving for solid region region1
[0] #0 Foam::error::printStack(Foam::Ostream&) in "/opt/openfoam171/lib/linux64GccDPOpt/libOpenFOAM.so"
[0] #1 Foam::sigFpe::sigFpeHandler(int) in "/opt/openfoam171/lib/linux64GccDPOpt/libOpenFOAM.so"
[0] #2 in "/lib/libc.so.6"
[0] #3 Foam::PCG::solve(Foam::Field<double>&, Foam::Field<double> const&, unsigned char) const in "/opt/openfoam171/lib/linux64GccDPOpt/libOpenFOAM.so"
[0] #4 Foam::fvMatrix<double>::solve(Foam::dictionary const&) in "/opt/openfoam171/lib/linux64GccDPOpt/libfiniteVolume.so"
[0] #5
[0] in "/home/aa/OpenFOAM/aa-1.7.1/applications/bin/linux64GccDPOpt/yazdRadBC"
[0] #6 __libc_start_main in "/lib/libc.so.6"
[0] #7
[0] in "/home/aa/OpenFOAM/aa-1.7.1/applications/bin/linux64GccDPOpt/yazdRadBC"
[lws16:14262] *** Process received signal ***
[lws16:14262] Signal: Floating point exception (8)
[lws16:14262] Signal code: (-6)
[lws16:14262] Failing at address: 0x3e8000037b6
[lws16:14262] [ 0] /lib/libc.so.6(+0x33af0) [0x7fbe6783caf0]
[lws16:14262] [ 1] /lib/libc.so.6(gsignal+0x35) [0x7fbe6783ca75]
[lws16:14262] [ 2] /lib/libc.so.6(+0x33af0) [0x7fbe6783caf0]
[lws16:14262] [ 3] /opt/openfoam171/lib/linux64GccDPOpt/libOpenFOAM.so(_ZNK4Foam3PCG5solveERNS_5FieldIdEER KS2_h+0xe75) [0x7fbe687027d5]
[lws16:14262] [ 4] /opt/openfoam171/lib/linux64GccDPOpt/libfiniteVolume.so(_ZN4Foam8fvMatrixIdE5solveERKNS _10dictionaryE+0x14b) [0x7fbe6a8ebcfb]
[lws16:14262] [ 5] yazdRadBC() [0x4597f7]
[lws16:14262] [ 6] /lib/libc.so.6(__libc_start_main+0xfd) [0x7fbe67827c4d]
[lws16:14262] [ 7] yazdRadBC() [0x425549]
[lws16:14262] *** End of error message ***
--------------------------------------------------------------------------
mpirun noticed that process rank 0 with PID 14262 on node lws16 exited on signal 8 (Floating point exception).
--------------------------------------------------------------------------
|
|
