单核计算没问题，mpi并行无法计算？
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弄了一个算例，单核计算没有问题，拿到服务器上并行计算就不能计算了，显示错误如下：
/*---------------------------------------------------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: 4.0 | | \\ / A nd | Web: www.OpenFOAM.org | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ Build : 4.0 Exec : interDyMFoam -parallel Date : Nov 28 2016 Time : 20:33:01 Host : "shzx-T630" PID : 19786 Case : /home/shzx/ubuntu/wdx/yanzheng nProcs : 20 Slaves : 19 ( "shzx-T630.19787" "shzx-T630.19788" "shzx-T630.19789" "shzx-T630.19790" "shzx-T630.19791" "shzx-T630.19792" "shzx-T630.19793" "shzx-T630.19794" "shzx-T630.19795" "shzx-T630.19796" "shzx-T630.19797" "shzx-T630.19798" "shzx-T630.19799" "shzx-T630.19800" "shzx-T630.19801" "shzx-T630.19802" "shzx-T630.19803" "shzx-T630.19804" "shzx-T630.19805" ) Pstream initialized with: floatTransfer : 0 nProcsSimpleSum : 0 commsType : nonBlocking polling iterations : 0 sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE). fileModificationChecking : Monitoring run-time modified files using timeStampMaster allowSystemOperations : Allowing user-supplied system call operations // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // Create time Create mesh for time = 0 Selecting dynamicFvMesh dynamicMotionSolverFvMesh Selecting motion solver: displacementLaplacian Selecting motion diffusion: inverseDistance PIMPLE: Operating solver in PISO mode Reading field p_rgh Reading field U Reading/calculating face flux field phi Reading transportProperties Selecting incompressible transport model Newtonian Selecting incompressible transport model Newtonian Selecting turbulence model type laminar Reading g Reading hRef Calculating field g.h No MRF models present No finite volume options present DICPCG: Solving for pcorr, Initial residual = 0, Final residual = 0, No Iterations 0 time step continuity errors : sum local = 0, global = 0, cumulative = 0 Reading/calculating face velocity Uf Courant Number mean: 0 max: 0 Starting time loop Courant Number mean: 0 max: 0 Interface Courant Number mean: 0 max: 0 deltaT = 0.00119048 Time = 0.00119048 -------------------------------------------------------------------------- mpirun noticed that process rank 15 with PID 19801 on node shzx-T630 exited on signal 8 (Floating point exception). --------------------------------------------------------------------------这个问题我以前也遇到过，不知道怎么解决，有的时候可以并行，有的时候就不可以。
我怀疑是网格的问题，但是检查了几次，也重新定义了patch，还是不行。由于同学并行其他例子没有问题，因此目测mpi本身应该没问题。
以下是我写的脚本：#!/bin/bash mkdir 0 echo blockMesh meshing... blockMesh > blockMesh.log echo snappyHexMesh meshing... snappyHexMesh -overwrite > snappyHexMesh.log echo Preparing 0 folder... rm -fr 0 cp -r 0.org 0 echo Setting the fields... setFields > setFields.log echo decompose the fields... decomposePar > decomposePar.log echo Running... mpirun -np 20 interDyMFoam -parallel > interDyMFoam.log echo Simulation complete.在Running这一步出问题，其他都正常，running这一步不并行的话没任何问题，但是算的太慢了，所以还是想要并行。。。。
请教大神们，这个类似于“浮点数溢出”的错误到底是咋回事。。
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这是控制台里面的一堆错误报告，由于太多，我取了一部分：
Running... [5] #0 [7] #0 Foam::error::printStack(Foam::Ostream&)[13] #0 Foam::error::printStack(Foam::Ostream&)[16] #0 Foam::error::printStack(Foam::Ostream&)[17] #0 Foam::error::printStack(Foam::Ostream&)[18] #0 Foam::error::printStack(Foam::Ostream&)[0] #0 Foam::error::printStack(Foam::Ostream&)Foam::error::printStack(Foam::Ostream&)[8] #0 Foam::error::printStack(Foam::Ostream&)[9] #0 [12] #0 Foam::error::printStack(Foam::Ostream&)[15] #0 Foam::error::printStack(Foam::Ostream&)[1] #0 Foam::error::printStack(Foam::Ostream&)[2] #0 Foam::error::printStack(Foam::Ostream&)[3] #0 Foam::error::printStack(Foam::Ostream&)[4] #0 Foam::error::printStack(Foam::Ostream&)[6] #0 Foam::error::printStack(Foam::Ostream&)Foam::error::printStack(Foam::Ostream&)[14] #0 Foam::error::printStack(Foam::Ostream&)[19] #0 Foam::error::printStack(Foam::Ostream&) at ??:? at ??:? at ??:? at ??:? [5] #1 Foam::sigFpe::sigHandler(int) at ??:? [8] #1 Foam::sigFpe::sigHandler(int)[12] #1 Foam::sigFpe::sigHandler(int)[2] #1 Foam::sigFpe::sigHandler(int)[13] #1 Foam::sigFpe::sigHandler(int) at ??:? [0] #1 Foam::sigFpe::sigHandler(int) at ??:? at ??:? at ??:? [16] #1 Foam::sigFpe::sigHandler(int)[15] #1 Foam::sigFpe::sigHandler(int) at ??:? [4] #1 Foam::sigFpe::sigHandler(int)[14] #1 Foam::sigFpe::sigHandler(int) at ??:? at ??:? [19] #1 Foam::sigFpe::sigHandler(int) at ??:? [3] #1 Foam::sigFpe::sigHandler(int)[17] #1 Foam::sigFpe::sigHandler(int) at ??:? [7] #1 Foam::sigFpe::sigHandler(int) at ??:? at ??:? at ??:? [1] #1 Foam::sigFpe::sigHandler(int)[9] #1 Foam::sigFpe::sigHandler(int)[6] #1 Foam::sigFpe::sigHandler(int) at ??:? [5] #2 ? at ??:? [13] #2 ? at ??:? [19] #2 ? at ??:? at ??:? [15] #2 ? at ??:? [3] #2 ? at ??:? [8] #2 ?[18] #1 Foam::sigFpe::sigHandler(int) at ??:? [1] #2 ? in "/lib/x86_64-linux-gnu/libc.so.6" [13] #3 Foam::tuibanwavegeneration::updateCoeffs() in "/lib/x86_64-linux-gnu/libc.so.6" [19] #3 Foam::tuibanwavegeneration::updateCoeffs() in "/lib/x86_64-linux-gnu/libc.so.6" [5] #3 Foam::tuibanwavegeneration::updateCoeffs() at ??:? [9] #2 ? in "/lib/x86_64-linux-gnu/libc.so.6" [15] #3 Foam::tuibanwavegeneration::updateCoeffs() at ??:? [12] #2 ? at ??:? [17] #2 ? at ??:? [7] #2 ? in "/lib/x86_64-linux-gnu/libc.so.6" [3] #3 Foam::tuibanwavegeneration::updateCoeffs() at ??:? [4] #2 ? at ??:? [14] #2 ? at ??:? [0] #2 ? in "/lib/x86_64-linux-gnu/libc.so.6" [1] #3 Foam::tuibanwavegeneration::updateCoeffs() at ??:? at ??:? [2] #2 ?[16] #2 ? in "/lib/x86_64-linux-gnu/libc.so.6" [9] #3 Foam::tuibanwavegeneration::updateCoeffs() at ??:? in "/lib/x86_64-linux-gnu/libc.so.6" at ??:? [19] #4 Foam::displacementLaplacianFvMotionSolver::solve() in "/lib[13] #4 /x86_64-linux-gnu/libc.so.6Foam::displacementLaplacianFvMotionSolver::solve() at ??:? " [17] #3 Foam::tuibanwavegeneration::updateCoeffs()[5] #4 Foam::displacementLaplacianFvMotionSolver::solve()[7] #3 Foam::tuibanwavegeneration::updateCoeffs() at ??:? [15] #4 Foam::displacementLaplacianFvMotionSolver::solve() in "/lib/x86_64-linux-gnu/libc.so.6" [8] #3 Foam::tuibanwavegeneration::updateCoeffs() at ??:? [6] #2 ? at ??:? [3] #4 Foam::displacementLaplacianFvMotionSolver::solve() at ??:? [1] #4 Foam::displacementLaplacianFvMotionSolver::solve() at ??:? [9] #4 Foam::displacementLaplacianFvMotionSolver::solve() in "/lib/x86_64-linux-gnu/libc.so.6" [12] #3 Foam::tuibanwavegeneration::updateCoeffs() at ??:? [5] #5 Foam::motionSolver::newPoints() in "/lib/x86_64-linux-gnu/libc.so.6" at ??:? [0] #3 [7] #4 Foam::displacementLaplacianFvMotionSolver::solve()Foam::tuibanwavegeneration::updateCoeffs() at ??:? [19] #5 Foam::motionSolver::newPoints() at ??:? at ??:? in "[17] #4 Foam::displacementLaplacianFvMotionSolver::solve()/lib/x86_64-linux-gnu/libc.so.6" [15] #5 Foam::motionSolver::newPoints() at ??:? [4] #3 Foam::tuibanwavegeneration::updateCoeffs()[13] #5 Foam::motionSolver::newPoints() in "/lib/x86_64-linux-gnu/libc.so.6" in "/lib/x86_64-linux-gnu/libc.so.6" [2] #3 Foam::tuibanwavegeneration::updateCoeffs()[16] #3 at ??:? Foam::tuibanwavegeneration::updateCoeffs()[3] #5 Foam::motionSolver::newPoints() at ??:? [1] #5 Foam::motionSolver::newPoints() at ??:? [9] #5 Foam::motionSolver::newPoints() in "/lib/x86_64-linux-gnu/libc.so.6" [14] #3 Foam::tuibanwavegeneration::updateCoeffs() at ??:? [7] #5 Foam::motionSolver::newPoints() at ??:? [5] #6 Foam::dynamicMotionSolverFvMesh::update() at ??:? [19] #6 Foam::dynamicMotionSolverFvMesh::update() at ??:? [15] #6 Foam::dynamicMotionSolverFvMesh::update() at ??:? [17] #5 Foam::motionSolver::newPoints() at ??:? [3] #6 Foam::dynamicMotionSolverFvMesh::update() in at ??:? "/lib/x86_64-linux-gnu/libc.so. at ??:? [13] #6 6" Foam::dynamicMotionSolverFvMesh::update()[6] #3 [8] #4 Foam::displacementLaplacianFvMotionSolver::solve()Foam::tuibanwavegeneration::updateCoeffs() at ??:? [1] #6 Foam::dynamicMotionSolverFvMesh::update() at ??:? [9] #6 Foam::dynamicMotionSolverFvMesh::update() at ??:? at ??:? [5] #7 at ??:? [15] #7 [12] #4 Foam::displacementLaplacianFvMotionSolver::solve() at ??:? [0] #4 at ??:? [3] #7 at ??:? [7] #6 Foam::dynamicMotionSolverFvMesh::update()Foam::displacementLaplacianFvMotionSolver::solve() at ??:? [19] #7 at ??:? [2] #4 at ??:? [17] #6 Foam::dynamicMotionSolverFvMesh::update()Foam::displacementLaplacianFvMotionSolver::solve() at ??:? [16] #4 Foam::displacementLaplacianFvMotionSolver::solve() at ??:? [13] #7 at ??:? [4] #4 Foam::displacementLaplacianFvMotionSolver::solve() at ??:? [9] #7 at ??:? [1] #7 ??? at ??:? [14] #4 Foam::displacementLaplacianFvMotionSolver::solve() at ??:? [7] #7 ? at ??:? [8] #5 Foam::motionSolver::newPoints() at ??:? [18] #2 ? at ??:? [6] #4 Foam::displacementLaplacianFvMotionSolver::solve()? at ??:? [17] #7 ?? at ??:? [12] #5 Foam::motionSolver::newPoints() at ??:? [5] #8 __libc_start_main at ??:? [0] #5 Foam::motionSolver::newPoints() at ??:? [16] #5 Foam::motionSolver::newPoints() at ??:? [15] #8 at ??:? __libc_start_main[4] #5 Foam::motionSolver::newPoints()?? at ??:? [3] #8 __libc_start_main at ??:? [1] #8 __libc_start_main at ??:? at ??:? [19] #8 __libc_start_main[2] #5 Foam::motionSolver::newPoints() at ??:? [9] #8 __libc_start_main at ??:? [13] #8 __libc_start_main at ??:? [14] #5 Foam::motionSolver::newPoints() in "/lib/x86_64-linux-gnu/libc.so.6" [5] #9 at in "/lib/x86_64-linux-gnu/libc.so.6" [18] #3 Foam::tuibanwavegeneration::updateCoeffs() in "/lib/x86_64-linux-gnu/libc.so.6" [15] #9 in "/lib/x86_64-linux-gnu/libc.so.6" [3] #9 at ??:? [17] #8 __libc_start_main??:? [6] #5 Foam::motionSolver::newPoints() in "/lib/x86_64-linux-gnu/libc.so.6" [1] #9 in "/lib/x86_64-linux-gnu/libc.so.6" [19] #9 at ??:? [7] #8 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" [9] #9 at ??:? [8] #6 Foam::dynamicMotionSolverFvMesh::update() in "/lib/x86_64-linux-gnu/libc.so.6" [13] #9 ???? at ??:? [16] #6 Foam::dynamicMotionSolverFvMesh::update() at ??:? [4] #6 Foam::dynamicMotionSolverFvMesh::update() at ??:? [12] #6 Foam::dynamicMotionSolverFvMesh::update()? in "/lib/x86_64-linux-gnu/libc.so.6" [7] #9 in "/lib/x86_64-linux-gnu/libc.so.6" [17] #9 ? at ??:? [shzx-T630:19791] *** Process received signal *** [shzx-T630:19791] Signal: Floating point exception (8) [shzx-T630:19791] Signal code: (-6) [shzx-T630:19791] Failing at address: 0x3e800004d4f [shzx-T630:19791] [ 0] /lib/x86_64-linux-gnu/libc.so.6(+0x354b0)[0x7f8a6fead4b0] [shzx-T630:19791] [ 1] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x38)[0x7f8a6fead428] [shzx-T630:19791] [ 2] /lib/x86_64-linux-gnu/libc.so.6(+0x354b0)[0x7f8a6fead4b0] [shzx-T630:19791] [ 3] /home/shzx/OpenFOAM/OpenFOAM-4.0/platforms/linux64GccDPInt32Opt/lib/libfvMotionSolvers.so(_ZN4Foam20tuibanwavegeneration12updateCoeffsEv+0x15ae)[0x7f8a4f6ad38e] [shzx-T630:19791] [ 4] /home/shzx/OpenFOAM/OpenFOAM-4.0/platforms/linux64GccDPInt32Opt/lib/libfvMotionSolvers.so(_ZN4Foam35displacementLaplacianFvMotionSolver5solveEv+0xd9)[0x7f8a4f5ff179] [shzx-T630:19791] [ 5] /home/shzx/OpenFOAM/OpenFOAM-4.0/platforms/linux64GccDPInt32Opt/lib/libdynamicMesh.so(_ZN4Foam12motionSolver9newPointsEv+0x25)[0x7f8a7310dc65] [shzx-T630:19791] [ 6] /home/shzx/OpenFOAM/OpenFOAM-4.0/platforms/linux64GccDPInt32Opt/lib/libdynamicFvMesh.so(_ZN4Foam25dynamicMotionSolverFvMesh6updateEv+0x37)[0x7f8a72b0fd47] [shzx-T630:19791] [ 7] interDyMFoam[0x439cf2] [shzx-T630:19791] [ 8] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)[0x7f8a6fe98830] [shzx-T630:19791] [ 9] interDyMFoam[0x446139] [shzx-T630:19791] *** End of error message *** ? at ??:? [shzx-T630:19801] *** Process received signal *** [shzx-T630:19801] Signal: Floating point exception (8) [shzx-T630:19801] Signal code: (-6) [shzx-T630:19801] Failing at address: 0x3e800004d59 [shzx-T630:19801] [ 0] /lib/x86_64-linux-gnu/libc.so.6(+0x354b0)[0x7f983082e4b0] [shzx-T630:19801] [ 1] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x38)[0x7f983082e428] [shzx-T630:19801] [ 2] /lib/x86_64-linux-gnu/libc.so.6(+0x354b0)[0x7f983082e4b0] [shzx-T630:19801] [ 3] /home/shzx/OpenFOAM/OpenFOAM-4.0/platforms/linux64GccDPInt32Opt/lib/libfvMotionSolvers.so(_ZN4Foam20tuibanwavegeneration12updateCoeffsEv+0x15ae)[0x7f981010038e] [shzx-T630:19801] [ 4] /home/shzx/OpenFOAM/OpenFOAM-4.0/platforms/linux64GccDPInt32Opt/lib/libfvMotionSolvers.so(_ZN4Foam35displacementLaplacianFvMotionSolver5solveEv+0xd9 [shzx-T630:19804] [ 7] interDyMFoam[0x439cf2] [shzx-T630:19804] [ 8] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)[0x7fd6e0718830] [shzx-T630:19804] [ 9] interDyMFoam[0x446139] [shzx-T630:19804] *** End of error message *** Simulation complete.```