Hello everyone,
To solve the “Out of Memory” issue in FreeFem++, I started using FreeFem++MPI. However, when I import external mesh files into FreeFem++MPI, I encounter the following error:
-- Mesh3::Mesh3 Erreur opening ZhengFangTi_420_FreeFem.mesh
current line = 15 mpirank 0 / 1
Assertion fail : (0)
line :161, in file ../femlib/Mesh3dn.cpp
Assertion fail : (0)
line :161, in file ../femlib/Mesh3dn.cpp
err code 6 , mpirank 0
Below are the code and mesh details. Could you please help me identify where the problem lies? Thank you all!
load "MUMPS_mpi"
load "msh3"
include "getARGV.idp"
verbosity=0;
real ttgv=1e10;
string meshfile = getARGV("-mesh", "ZhengFangTi_420_FreeFem.mesh");
//mesh3 Th = readmesh3("ZhengFangTi_420_FreeFem.mesh"); //
mesh3 Th;
if(mpirank==0)
{
Th=readmesh3("ZhengFangTi_420_FreeFem.mesh");
Th=change(Th,fregion=nuTriangle%mpisize);
}
broadcast(processor(0),Th);
fespace VVh(Th,[P2,P2,P2,P1]);
fespace UUh(Th,[P2,P2,P2]);
fespace Uh(Th,P2);
fespace Ph(Th,P1);
macro Grad(u) [dx(u),dy(u),dz(u)]// EOM
macro div(u1,u2,u3) (dx(u1)+dy(u2)+dz(u3)) //EOM
func fup = (1-x)*(x)*y*(1-y)*16;
VVh [u1,u2,u3,p];
VVh [v1,v2,v3,q];
real timeI=mpiWtime();
real time1=mpiWtime();
varf vStokes([u1,u2,u3,p],[v1,v2,v3,q]) =
int3d(Th,qforder=3,mpirank)( Grad(u1)'*Grad(v1) + Grad(u2)'*Grad(v2) + Grad(u3)'*Grad(v3) //' for emacs
- div(u1,u2,u3)*q - div(v1,v2,v3)*p + 1e-10*q*p )
+ on(2,u1=fup,u2=0,u3=0) + on(1,u1=0,u2=0,u3=0) ;
matrix MStokes=vStokes(VVh,VVh,tgv=ttgv);
if(mpirank==0)
cout << "size of matrix " << MStokes.n << " x " << MStokes.m << " nn nzero coef = " << MStokes.nbcoef << endl;
time1=mpiWtime()-time1;
real timeF=mpiWtime();
set(MStokes,solver=sparsesolver,master=-1);
timeF=mpiWtime()-timeF;
real time2=mpiWtime();
real[int] b=vStokes(0,VVh);
time2=mpiWtime()-time2;
real time3=mpiWtime();
u1[] = MStokes^-1*b;
time3=mpiWtime()-time3;
timeI=mpiWtime()-timeI;
if(mpirank==0)
{
cout << "============= CPU TIME ============" << endl;
cout << "size of matrix " << MStokes.n << " x " << MStokes.m << " nn nzero coef = " << MStokes.nbcoef << endl;
cout << " matrix " << time1 << endl;
cout << " Fact " << timeF << endl;
cout << " second member " << time2 << endl;
cout << " solve " << time3 << endl;
cout << " ------------" << endl;
cout << " all " << timeI << endl;
cout << "============= CPU TIME ============" << endl;
}
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