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September 29, 2012, 17:31 |
decomposePar, 4 processors
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#1 |
New Member
Romain
Join Date: Jun 2010
Location: Lyon
Posts: 28
Rep Power: 15 |
Hello,
I have a case which is running just fine with 1 processor, 2 processor (decomposition method : scotch) but when I try to run it with 4 processors, it is not working anymore. I did tried two differents decompositions methods without any success. The solver is starting, it is not diverging, but after some iterations, it stops with this error : Code:
[2] #0 Foam::error::printStack(Foam::Ostream&)[1] #0 Foam::error::printStack(Foam::Ostream&) in "/opt/openfoam211/platforms in "/opt/openfoam211/platforms/linux64GccDPO/linux64GccDPOpt/lib/libOpenpt/lib/libOpenFOAM.so" [1] #1 FOAM.so" [2] #1 Foam::sigFpe::sigHandler(int)Foam::sigFpe::sigHandler(int) in "/opt/openfoam211/platforms/linux64GccDPOpt/lib/libOpenFOAM.so" [2] #2 in "/lib/x86_64-linux-gnu/libc.so.6" [2] #3 Foam::GAMGSolver::scalingFactor(Foam::Field<double>&, Foam::Field<double> const&, Foam::Field<double> const&, Foam::Field<double> const&) const in "/opt/openfoam211/platforms/linux64GccDPOpt/lib/libOpenFOAM.so" [1] #2 in "/opt/openfoam211/platforms/linux64GccDPOpt/lib/libOpenFOAM.so" [2] #4 Foam::GAMGSolver::scalingFactor(Foam::Field<double>&, Foam::lduMatrix const&, Foam::Field<double>&, Foam::FieldField<Foam::Field, double> const&, Foam::UPtrList<Foam::lduInterfaceField const> const&, Foam::Field<double> const&, unsigned char) const in "/lib/x86_64-linux-gnu/libc.so.6" [1] #3 Foam::GAMGSolver::scalingFactor(Foam::Field<double>&, Foam::Field<double> const&, Foam::Field<double> const&, Foam::Field<double> const&) const in "/opt/openfoam211/platforms/linux64GccDPOpt/lib/libOpenFOAM.so" [2] #5 Foam::GAMGSolver::Vcycle(Foam::PtrList<Foam::lduMatrix::smoother> const&, Foam::Field<double>&, Foam::Field<double> const&, Foam::Field<double>&, Foam::Field<double>&, Foam::Field<double>&, Foam::PtrList<Foam::Field<double> >&, Foam::PtrList<Foam::Field<double> >&, unsigned char) const in "/opt/openfoam211/platforms/linux64GccDPOpt/lib/libOpenFOAM.so" [1] #4 Foam::GAMGSolver::scalingFactor(Foam::Field<double>&, Foam::lduMatrix const&, Foam::Field<double>&, Foam::FieldField<Foam::Field, double> const&, Foam::UPtrList<Foam::lduInterfaceField const> const&, Foam::Field<double> const&, unsigned char) const in "/opt/openfoam211/platforms/linux64GccDPOpt/lib/libOpenFOAM.so" [2] #6 Foam::GAMGSolver::solve(Foam::Field<double>&, Foam::Field<double> const&, unsigned char) const in "/opt/openfoam211/platforms/linux64GccDPOpt/lib/libOpenFOAM.so" [1] #5 Foam::GAMGSolver::Vcycle(Foam::PtrList<Foam::lduMatrix::smoother> const&, Foam::Field<double>&, Foam::Field<double> const&, Foam::Field<double>&, Foam::Field<double>&, Foam::Field<double>&, Foam::PtrList<Foam::Field<double> >&, Foam::PtrList<Foam::Field<double> >&, unsigned char) const in "/opt/openfoam211/platforms/linux64GccDPOpt/lib/libOpenFOAM.so" [2] #7 Foam::fvMatrix<double>::solve(Foam::dictionary const&) in "/opt/openfoam211/platforms/linux64GccDPOpt/lib/libOpenFOAM.so" [1] #6 Foam::GAMGSolver::solve(Foam::Field<double>&, Foam::Field<double> const&, unsigned char) const in "/opt/openfoam211/platforms/linux64GccDPOpt/lib/libfiniteVolume.so" [2] #8 in "/opt/openfoam211/platforms/linux64GccDPOpt/lib/libOpenFOAM.so" [1] #7 Foam::fvMatrix<double>::solve(Foam::dictionary const&)Foam::fvMatrix<double>::solve() in "/home/caelinux/OpenFOAM/caelinux-2.1.1/platforms/linux64GccDPOpt/bin/mychtMultiRegionSimpleFoam" [2] #9 in "/opt/openfoam21[2] in "/hom1e/caelinux/OpenFOAM/caelinux-2.1.1/platforms/linux64GccDPOpt/bin/mychtMultiRegionSimpleFoam" [2] #10 __libc_start_main/platforms/linux64GccDPOpt/lib/libfiniteVolume.so" [1] #8 in "/lib/x86_64-linux-gnu/libc.so.6" [2] #11 Foam::fvMatrix<double>::solve() [2] in "/home/caelinux/OpenFOAM/caelinux-2.1.1/platforms/linux64GccDPOpt/bin/mychtMultiRegionSimpleFoam" [laptop:13776] *** Process received signal *** [laptop:13776] Signal: Floating point exception (8) [laptop:13776] Signal code: (-6) [laptop:13776] Failing at address: 0x3e8000035d0 in "/home/caelinux/OpenFOAM/[romain-laptop:13776] [ 0] /lib/x86_64-linux-gnu/libc.so.6(+0x364c0) [0x7f37f270f4c0] [laptop:13776] [ 1] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x35) [0x7f37f270f445] [laptop:13776] [ 2] /lib/x86_64-linux-gnu/libc.so.6(+0x364c0) [0x7f37f270f4c0] [laptop:13776] [ 3] /opt/openfoam211/platforms/linux64GccDPOpt/lib/libOpenFOAM.so(_ZNK4Foam10GAMGSolver13scalingFactorERNS_5FieldIdEERKS2_S5_S5_+0x77) [0x7f37f374b197] [laptop:13776] [ 4] /opt/openfoam211/platforms/linux64GccDPOpt/lib/libOpenFOAM.so(_ZNK4Foam10GAMGSolver13scalingFactorERNS_5FieldIdEERKNS_9lduMatrixES3_RKNS_10FieldFieldIS1_dEERKNS_8UPtrListIKNS_17lduInterfaceFieldEEERKS2_h+0xa6) [0x7f37f374b426] [romain-laptop:13776] [ 5] /opt/openfoam211/platforms/linux64GccDPOpt/lib/libOpenFOAM.so(_ZNK4Foam10GAMGSolver6VcycleERKNS_7PtrListINS_9lduMatrix8smootherEEERNS_5FieldIdEERKS8_S9_S9_S9_RNS1_IS8_EESD_h+0xfa0) [0x7f37f374dc90] [laptop:13776] [ 6] /opt/openfoam211/platforms/linux64GccDPOpt/lib/libOpenFOAM.so(_ZNK4Foam10GAMGSolver5solveERNS_5FieldIdEERKS2_h+0x4c3) [0x7f37f374ec23] [laptop:13776] [ 7] /opt/openfoam211/platforms/linux64GccDPOpt/lib/libfiniteVolume.so(_ZN4Foam8fvMatrixIdE5solveERKNS_10dictionaryE+0x137) [0x7f37f5875307] [laptop:13776] [ 8] mychtMultiRegionSimpleFoam(_ZN4Foam8fvMatrixIdE5solveEv+0xc0) [0x432530] [laptop:13776] [ 9] mychtMultiRegionSimpleFoam() [0x422498] [laptop:13776] [10] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed) [0x7f37f26fa76d] [laptop:13776] [11] mychtMultiRegionSimpleFoam() [0x424c8d] [laptop:13776] *** End of error message *** caeli-------------------------------------------------------------------------- mpirun noticed that process rank 2 with PID 13776 on node romain-laptop exited on signal 8 (Floating point exception). -------------------------------------------------------------------------- Final Time 22:23:06 Simulation Time: 29 secondes Simulation Time: 0 minutes Thanks for your help. |
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September 30, 2012, 05:32 |
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#3 |
Senior Member
Bernhard
Join Date: Sep 2009
Location: Delft
Posts: 790
Rep Power: 21 |
Nimasam, I never had any problems with running GAMG on multiple processors. Why could it be the issue here?
Nakor, can you give more details about the solver and system you're using? |
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September 30, 2012, 16:22 |
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#4 |
New Member
Romain
Join Date: Jun 2010
Location: Lyon
Posts: 28
Rep Power: 15 |
Thanks, it works that way. Any explication about why it was working for 2 processors but not anymore with 4 ?
@Bernhard The solver is a modified version of chtMultiRegionSimpleFoam, but I did also tried with chtMultiRegionFoam without any more success so it does not come from my modifications to the solver. To describe my case in a few words, there are a solid domain, and two liquids domains, and I am mainly interested by the thermal aspect of the simulation since most of the fluid does not move (only convection near the heated walls) |
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