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Half working 2D mpi v3, write incomplete

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This commit is contained in:
Aditya Ujeniya 2023-08-22 23:01:33 +02:00
parent 5ecd277ab3
commit c13d88f4fa
5 changed files with 237 additions and 64 deletions
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9
BasicSolver/2D-mpi-v3/src/main.c
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@ -52,13 +52,12 @@ int main (int argc, char** argv)
initParticleTracer(&particletracer, &params, &solver);
if (rank == 0) {
printParameter(&params);
}
printParticleTracerParameters(&particletracer);
}
initProgress(solver.te);
abort();
double tau = solver.tau;
double te = solver.te;
double t = 0.0;
@ -82,7 +81,7 @@ int main (int argc, char** argv)
solver_generic[variant - 1](&solver);
adaptUV(&solver);
//trace(&particletracer, solver.u, solver.v, t);
trace(&particletracer, solver.u, solver.v, t);
t += solver.dt;
@ -102,6 +101,8 @@ int main (int argc, char** argv)
printf("Solution took %.2fs\n", E - S);
}
collectResult(&solver);
freeParticles(&particletracer);
MPI_Finalize();
return EXIT_SUCCESS;

211
BasicSolver/2D-mpi-v3/src/particletracing.c
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@ -20,7 +20,12 @@ static int ts = 0;
#define IDIM 0
#define JDIM 1
static double sum(double* sizes, int size, int offset, int coord, int init)
#define XOFFSET 0
#define YOFFSET 1
#define XOFFSETEND 2
#define YOFFSETEND 3
static double sumX(double* sizes, int size, int offset, int coord, int init)
{
double sum = 0;
@ -32,13 +37,31 @@ static double sum(double* sizes, int size, int offset, int coord, int init)
return sum;
}
static double sumY(double* sizes, int size, int offset, int coord, int init)
{
double sum = 0;
for (int i = init * offset; i < size && coord > 0; ++i, --coord)
{
sum += sizes[i];
}
return sum;
}
void printParticles(ParticleTracer* particletracer)
{
for(int i = 0; i < particletracer->totalParticles; ++i)
{
printf("Particle position X : %.2f, Y : %.2f, flag : %d\n", particletracer->particlePool[i].x,
printf("Rank : %d Particle position X : %.2f, Y : %.2f, flag : %d, total pt : %d, pointer : %d, xOffset : %.2f, yOffset : %.2f, xOffsetEnd : %.2f, yOffsetEnd : %.2f\n",
particletracer->rank,
particletracer->particlePool[i].x,
particletracer->particlePool[i].y,
particletracer->particlePool[i].flag);
particletracer->particlePool[i].flag,
particletracer->totalParticles,
particletracer->pointer,
particletracer->xOffset, particletracer->yOffset,
particletracer->xOffsetEnd, particletracer->yOffsetEnd);
}
}
void injectParticles(ParticleTracer* particletracer)
@ -48,7 +71,7 @@ void injectParticles(ParticleTracer* particletracer)
{
x = particletracer->linSpaceLine[i].x;
y = particletracer->linSpaceLine[i].y;
if(true)
if(x >= particletracer->xOffset && y >= particletracer->yOffset && x < particletracer->xOffsetEnd && y < particletracer->yOffsetEnd )
{
particletracer->particlePool[particletracer->pointer].x = x;
particletracer->particlePool[particletracer->pointer].y = y;
@ -63,7 +86,8 @@ void advanceParticles(ParticleTracer* particletracer, double* restrict u, double
{
int imax = particletracer->imax;
int jmax = particletracer->jmax;
int imaxLocal = particletracer->imaxLocal;
int jmaxLocal = particletracer->jmaxLocal;
double dx = particletracer->dx;
double dy = particletracer->dy;
@ -71,12 +95,31 @@ void advanceParticles(ParticleTracer* particletracer, double* restrict u, double
double xlength = particletracer->xlength;
double ylength = particletracer->ylength;
Particle buff[particletracer->size][30];
for(int i = 0; i < particletracer->size; ++i)
{
for(int j = 0; j < 30; ++j)
{
buff[i][j].x = 0.0;
buff[i][j].y = 0.0;
buff[i][j].flag = false;
}
}
int particleBufIndex[particletracer->size];
memset(particleBufIndex, 0, sizeof(particleBufIndex));
for(int i = 0; i < particletracer->totalParticles; ++i)
{
if(particletracer->particlePool[i].flag == true)
{
double x = particletracer->particlePool[i].x;
double y = particletracer->particlePool[i].y;
double xTemp = particletracer->particlePool[i].x;
double yTemp = particletracer->particlePool[i].y;
double x = xTemp - particletracer->xOffset;
double y = yTemp - particletracer->yOffset;
int iCoord = (int)(x / dx) + 1;
int jCoord = (int)((y + 0.5 * dy) / dy) + 1;
@ -92,7 +135,7 @@ void advanceParticles(ParticleTracer* particletracer, double* restrict u, double
(x2 - x) * (y - y1) * U(iCoord - 1, jCoord) +
(x - x1) * (y - y1) * U(iCoord, jCoord));
double new_x = x + particletracer->dt * u_n;
double new_x = (x + particletracer->xOffset) + particletracer->dt * u_n;
particletracer->particlePool[i].x = new_x;
iCoord = (int)((x + 0.5 * dx) / dx) + 1;
@ -109,7 +152,7 @@ void advanceParticles(ParticleTracer* particletracer, double* restrict u, double
(x2 - x) * (y - y1) * V(iCoord - 1, jCoord) +
(x - x1) * (y - y1) * V(iCoord, jCoord));
double new_y = y + particletracer->dt * v_n;
double new_y = (y + particletracer->yOffset) + particletracer->dt * v_n;
particletracer->particlePool[i].y = new_y;
// printf("\tOld X : %.2f, New X : %.2f, iCoord : %d\n\tOld Y : %.2f, New Y : %.2f, jCoord : %d\n\n", x, new_x, iCoord, y, new_y, jCoord);
@ -119,23 +162,82 @@ void advanceParticles(ParticleTracer* particletracer, double* restrict u, double
// printf("\t j-1 * (imax + 2) + i-1 = %d with element from U : %.2f", (jCoord - 1) * (200 + 2) + (iCoord - 1), u[(jCoord - 1) * (imax + 2) + (iCoord - 1)]);
// printf("\nimax : %d, jmax : %d\n", imax, jmax);
if (((new_x < 0.0) || (new_x > xlength) || (new_y < 0.0) || (new_y > ylength)))
if (((new_x < particletracer->xOffset) || (new_x >= particletracer->xOffsetEnd) ||
(new_y < particletracer->yOffset) || (new_y >= particletracer->yOffsetEnd)))
{
//New logic to transfer particles to neighbouring ranks or discard the particle.
for(int i = 0; i < particletracer->size; ++i)
{
if((new_x >= particletracer->offset[i + particletracer->size * XOFFSET]) &&
(new_x < particletracer->offset[i + particletracer->size * XOFFSETEND]) &&
(new_y >= particletracer->offset[i + particletracer->size * YOFFSET]) &&
(new_y < particletracer->offset[i + particletracer->size * YOFFSETEND]) &&
i != particletracer->rank)
{
buff[i][particleBufIndex[i]].x = new_x;
buff[i][particleBufIndex[i]].y = new_y;
buff[i][particleBufIndex[i]].flag = true;
++particleBufIndex[i];
}
}
particletracer->particlePool[i].flag = false;
}
}
}
for(int i = 0; i < particletracer->size; ++i)
{
if(i != particletracer->rank)
{
MPI_Send(buff[i], 30, particletracer->mpi_particle, i, 0, particletracer->comm);
}
}
for(int i = 0; i < particletracer->size; ++i)
{
if(i != particletracer->rank)
{
MPI_Recv(buff[i], 30, particletracer->mpi_particle, i, 0, particletracer->comm, MPI_STATUS_IGNORE);
}
}
for(int i = 0; i < particletracer->size; ++i)
{
if(i != particletracer->rank)
{
for(int j = 0; j < 30; ++j)
{
if(buff[i][j].flag == true)
{
particletracer->particlePool[particletracer->pointer].x = buff[i][j].x;
particletracer->particlePool[particletracer->pointer].y = buff[i][j].y;
particletracer->particlePool[particletracer->pointer].flag = true;
++(particletracer->pointer);
++(particletracer->totalParticles);
}
}
}
}
}
void freeParticles(ParticleTracer* particletracer)
{
free(particletracer->particlePool);
free(particletracer->linSpaceLine);
free(particletracer->offset);
}
void writeParticles(ParticleTracer* particletracer)
{
VtkOptions opts = { .particletracer = particletracer };
if(particletracer->rank == 0)
{
int overallTotalParticles;
MPI_Reduce(&particletracer->totalParticles, &overallTotalParticles, 1, MPI_INT, MPI_SUM, 0, particletracer->comm);
printf("Total collected particles at rank 0 : %d", overallTotalParticles);
VtkOptions opts = { .particletracer = particletracer, .overallTotalParticles = overallTotalParticles };
char filename[50];
snprintf(filename, 50, "vtk_files/particles%d.vtk", ts);
@ -143,6 +245,8 @@ void writeParticles(ParticleTracer* particletracer)
vtkParticle(&opts, "particle");
vtkClose(&opts);
FILE* fp;
Particle* particlePool = particletracer->particlePool;
@ -161,6 +265,7 @@ void writeParticles(ParticleTracer* particletracer)
fprintf(fp, "%f %f\n", x, y);
}
fclose(fp);
}
++ts;
}
@ -202,9 +307,17 @@ void initParticleTracer(ParticleTracer* particletracer, Parameter* params, Solve
particletracer->imaxLocal = solver->imaxLocal;
particletracer->jmaxLocal = solver->jmaxLocal;
particletracer->estimatedNumParticles = (particletracer->imaxLocal * particletracer->jmaxLocal) + (4 * params->numberOfParticles);
particletracer->estimatedNumParticles = (particletracer->imaxLocal * particletracer->jmaxLocal);
particletracer->particlePool = malloc(sizeof(Particle) * particletracer->estimatedNumParticles);
for(int i = 0; i < particletracer->estimatedNumParticles; ++i)
{
particletracer->particlePool[i].x = 0.0;
particletracer->particlePool[i].y = 0.0;
particletracer->particlePool[i].flag = false;
}
particletracer->linSpaceLine = malloc(sizeof(Particle) * particletracer->numberOfParticles);
/* duplicating communication from solver */
@ -213,6 +326,9 @@ void initParticleTracer(ParticleTracer* particletracer, Parameter* params, Solve
particletracer->rank = solver->rank;
particletracer->size = solver->size;
particletracer->offset = (double *)malloc(sizeof(double) * 4 * particletracer->size);
memcpy(particletracer->dims, solver->dims, sizeof(solver->dims));
memcpy(particletracer->coords, solver->coords, sizeof(solver->coords));
@ -226,14 +342,40 @@ void initParticleTracer(ParticleTracer* particletracer, Parameter* params, Solve
particletracer->yLocal = particletracer->jmaxLocal * particletracer->dy;
double xLocal[solver->size];
double yLocal[solver->size];
double xLocal[particletracer->size];
double yLocal[particletracer->size];
double offset[4][particletracer->size];
MPI_Allgather(&particletracer->xLocal, 1, MPI_DOUBLE, xLocal, 1, MPI_DOUBLE, particletracer->comm);
MPI_Allgather(&particletracer->yLocal, 1, MPI_DOUBLE, yLocal, 1, MPI_DOUBLE, particletracer->comm);
particletracer->xOffset = sum(xLocal, particletracer->size, particletracer->dims[JDIM], particletracer->coords[IDIM], particletracer->coords[JDIM]);
particletracer->yOffset = sum(yLocal, particletracer->size, particletracer->dims[IDIM], particletracer->coords[JDIM], particletracer->coords[IDIM]);
particletracer->xOffset = sumX(xLocal, particletracer->size, particletracer->dims[JDIM], particletracer->coords[IDIM], particletracer->coords[JDIM]);
particletracer->yOffset = sumY(yLocal, particletracer->size, particletracer->dims[JDIM], particletracer->coords[JDIM], particletracer->coords[IDIM]);
particletracer->xOffsetEnd = particletracer->xOffset + particletracer->xLocal;
particletracer->yOffsetEnd = particletracer->yOffset + particletracer->yLocal;
MPI_Allgather(&particletracer->xOffset, 1, MPI_DOUBLE, offset[0], 1, MPI_DOUBLE, particletracer->comm);
MPI_Allgather(&particletracer->yOffset, 1, MPI_DOUBLE, offset[1], 1, MPI_DOUBLE, particletracer->comm);
MPI_Allgather(&particletracer->xOffsetEnd, 1, MPI_DOUBLE, offset[2], 1, MPI_DOUBLE, particletracer->comm);
MPI_Allgather(&particletracer->yOffsetEnd, 1, MPI_DOUBLE, offset[3], 1, MPI_DOUBLE, particletracer->comm);
memcpy(particletracer->offset, offset, sizeof(offset));
// if(particletracer->rank == 0)
// {
// for(int i = 0;i < particletracer->size; ++i)
// {
// printf("Rank : %d and its xOffset : %.2f, yOffset : %.2f, xLocal : %.2f, yLocal : %.2f, xOffsetEnd : %.2f, yOffsetEnd : %.2f\n",
// i, particletracer->offset[i + particletracer->size * XOFFSET],
// particletracer->offset[i + particletracer->size * YOFFSET], xLocal[i], yLocal[i],
// particletracer->offset[i + particletracer->size * XOFFSETEND],
// particletracer->offset[i + particletracer->size * YOFFSETEND]);
// }
// }
for (int i = 0; i < particletracer->numberOfParticles; ++i)
{
@ -243,6 +385,25 @@ void initParticleTracer(ParticleTracer* particletracer, Parameter* params, Solve
particletracer->linSpaceLine[i].flag = true;
}
// Create the mpi_particle datatype
MPI_Datatype mpi_particle;
int lengths[3] = { 1, 1, 1 };
MPI_Aint displacements[3];
Particle dummy_particle;
MPI_Aint base_address;
MPI_Get_address(&dummy_particle, &base_address);
MPI_Get_address(&dummy_particle.x, &displacements[0]);
MPI_Get_address(&dummy_particle.y, &displacements[1]);
MPI_Get_address(&dummy_particle.flag, &displacements[2]);
displacements[0] = MPI_Aint_diff(displacements[0], base_address);
displacements[1] = MPI_Aint_diff(displacements[1], base_address);
displacements[2] = MPI_Aint_diff(displacements[2], base_address);
MPI_Datatype types[3] = { MPI_DOUBLE, MPI_DOUBLE, MPI_C_BOOL };
MPI_Type_create_struct(3, lengths, displacements, types, &particletracer->mpi_particle);
MPI_Type_commit(&particletracer->mpi_particle);
}
void printParticleTracerParameters(ParticleTracer* particletracer)
@ -254,9 +415,9 @@ void printParticleTracerParameters(ParticleTracer* particletracer)
printf("\t(Line along which the particles are to be injected) \n\tx1 : %.2f, y1 : %.2f, x2 : %.2f, y2 : %.2f\n", particletracer->x1, particletracer->y1, particletracer->x2, particletracer->y2);
printf("\tPointer : %d, TotalParticles : %d\n", particletracer->pointer, particletracer->totalParticles);
printf("\tdt : %.2f, dx : %.2f, dy : %.2f\n", particletracer->dt, particletracer->dx, particletracer->dy);
printf("\tcoord[0] : %d, coord[1] : %d\n", particletracer->coords[IDIM], particletracer->coords[JDIM]);
printf("\txOffset : %.2f, yOffset : %.2f\n", particletracer->xOffset, particletracer->yOffset);
printf("\txLocal : %.2f, yLocal : %.2f\n", particletracer->xLocal, particletracer->yLocal);
// printf("\tcoord[0] : %d, coord[1] : %d\n", particletracer->coords[IDIM], particletracer->coords[JDIM]);
// printf("\txOffset : %.2f, yOffset : %.2f\n", particletracer->xOffset, particletracer->yOffset);
// printf("\txLocal : %.2f, yLocal : %.2f\n", particletracer->xLocal, particletracer->yLocal);
}
void trace(ParticleTracer* particletracer, double* u, double* v, double time)
@ -272,6 +433,7 @@ void trace(ParticleTracer* particletracer, double* u, double* v, double time)
if( (time - particletracer->lastWriteTime) >= particletracer->writeTimePeriod)
{
//writeParticles(particletracer);
printParticles(particletracer);
particletracer->lastWriteTime = time;
}
@ -285,11 +447,18 @@ void compress(ParticleTracer* particletracer)
{
Particle* memPool = particletracer->particlePool;
Particle tempPool[particletracer->totalParticles];
for(int i = 0; i < particletracer->totalParticles; ++i)
{
tempPool[i].x = 0.0;
tempPool[i].y = 0.0;
tempPool[i].flag = false;
}
int totalParticles = 0;
for(int i=0; i < particletracer->totalParticles; ++i)
{
if(memPool[i].flag == 1)
if(memPool[i].flag == true)
{
tempPool[totalParticles].x = memPool[i].x;
tempPool[totalParticles].y = memPool[i].y;
@ -301,5 +470,5 @@ void compress(ParticleTracer* particletracer)
particletracer->totalParticles = totalParticles;
particletracer->pointer = totalParticles + 1;
memcpy(particletracer->particlePool, tempPool, totalParticles*sizeof(Particle));
memcpy(particletracer->particlePool, tempPool, sizeof(tempPool));
}

7
BasicSolver/2D-mpi-v3/src/particletracing.h
View File

@ -39,11 +39,16 @@ typedef struct {
double x1, y1, x2, y2;
MPI_Comm comm;
MPI_Datatype mpi_particle;
int rank, size;
int iNeighbours[NDIMS], jNeighbours[NDIMS];
int coords[NDIMS], dims[NDIMS];
double xLocal, yLocal, xOffset, yOffset;
double xLocal, yLocal, xOffset, yOffset, xOffsetEnd, yOffsetEnd;
double* offset;
} ParticleTracer;
void initParticleTracer(ParticleTracer*, Parameter*, Solver* );

8
BasicSolver/2D-mpi-v3/src/vtkWriter.c
View File

@ -61,19 +61,17 @@ void vtkParticle(VtkOptions* o, char* name)
{
Particle* particlePool = o->particletracer->particlePool;
int imax = o->solver->imax;
int jmax = o->solver->jmax;
if (o->fh == NULL) {
printf("vtkWriter not initialize! Call vtkOpen first!\n");
exit(EXIT_FAILURE);
}
fprintf(o->fh, "POINTS %d float\n", o->particletracer->totalParticles);
fprintf(o->fh, "POINTS %d float\n", o->overallTotalParticles);
for (int i = 0; i < o->particletracer->totalParticles; ++i)
for (int i = 0; i < o->particletracer->size; ++i)
{
double x = particlePool[i].x;
double y = particlePool[i].y;
fprintf(o->fh, "%.2f %.2f 0.0\n", x, y);

2
BasicSolver/2D-mpi-v3/src/vtkWriter.h
View File

@ -16,7 +16,7 @@ typedef enum VtkFormat { ASCII = 0, BINARY } VtkFormat;
typedef struct VtkOptions {
VtkFormat fmt;
FILE* fh;
Solver* solver;
int overallTotalParticles;
ParticleTracer* particletracer;
} VtkOptions;