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Fully working BasicSolver

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This commit is contained in:
Aditya Ujeniya
2024-07-24 22:56:05 +02:00
parent 312af6f663
commit d9361a8086
45 changed files with 372 additions and 110 deletions
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15
BasicSolver/2D-mpi/Makefile
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@@ -39,9 +39,20 @@ $(BUILD_DIR)/%.s: %.c
$(info ===> GENERATE ASM $@)
$(CC) -S $(CPPFLAGS) $(CFLAGS) $< -o $@
.PHONY: clean distclean tags info asm format
.PHONY: clean distclean vis vis_clean tags info asm format
clean:
vis:
$(info ===> GENERATE VISUALIZATION)
@gnuplot -e "filename='pressure.dat'" ./surface.plot
@gnuplot -e "filename='velocity.dat'" ./vector.plot
@gnuplot -e "filename='residual.dat'" ./residual.plot
vis_clean:
$(info ===> CLEAN VISUALIZATION)
@rm -f *.dat
@rm -f *.png
clean: vis_clean
$(info ===> CLEAN)
@rm -rf $(BUILD_DIR)
@rm -f tags

3
BasicSolver/2D-mpi/config.mk
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@@ -1,10 +1,11 @@
# Supported: GCC, CLANG, ICC
TAG ?= ICC
# Supported: true, false
ENABLE_MPI ?= true
ENABLE_OPENMP ?= false
# Supported: rb, mg
SOLVER ?= mg
# Run in debug settings ?= mg
# Supported: v1, v2, v3
COMM_TYPE ?= v3
#Feature options

8
BasicSolver/2D-mpi/dcavity.par
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@@ -33,14 +33,14 @@ jmax 128 # number of interior cells in y-direction
# ---------
te 10.0 # final time
dt 0.02 # time stepsize
tau 0.5 # safety factor for time stepsize control (<0 constant delt)
dt 0.02 # time stepsize
tau 0.5 # safety factor for time stepsize control (<0 constant delt)
# Multigrid data:
# ---------
levels 2 # Multigrid levels
presmooth 20 # Pre-smoothning iterations
presmooth 20 # Pre-smoothning iterations
postsmooth 5 # Post-smoothning iterations
# Pressure Iteration Data:
@@ -48,6 +48,6 @@ postsmooth 5 # Post-smoothning iterations
itermax 1000 # maximal number of pressure iteration in one time step
eps 0.001 # stopping tolerance for pressure iteration
omg 1.9 # relaxation parameter for SOR iteration
omg 1.7 # relaxation parameter for SOR iteration
gamma 0.9 # upwind differencing factor gamma
#===============================================================================

9
BasicSolver/2D-mpi/residual.plot Normal file
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@@ -0,0 +1,9 @@
set terminal png size 1800,768 enhanced font ,12
set output 'residual.png'
set datafile separator whitespace
set xlabel "Timestep"
set ylabel "Residual"
set logscale y 2
plot 'residual.dat' using 1:2 title "Residual"

36
BasicSolver/2D-mpi/src/comm-v1.c
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@@ -14,7 +14,7 @@ static int sum(int* sizes, int position)
{
int sum = 0;
for (int i = 0; i < position; i++) {
for (int i = 0; i < position; i += position) {
sum += sizes[i];
}
@@ -67,6 +67,7 @@ int commIsBoundary(Comm* c, int direction)
void commExchange(Comm* c, double* grid)
{
// printf("Rank : %d In exchange \n", c->rank);
#ifdef _MPI
MPI_Request requests[4] = { MPI_REQUEST_NULL,
MPI_REQUEST_NULL,
@@ -174,6 +175,17 @@ void commPartition(Comm* c, int jmax, int imax)
#ifdef _MPI
c->imaxLocal = imax;
c->jmaxLocal = sizeOfRank(c->coords[JDIM], c->size, jmax);
c->neighbours[BOTTOM] = c->rank == 0 ? -1 : c->rank - 1;
c->neighbours[TOP] = c->rank == (c->size - 1) ? -1 : c->rank + 1;
c->neighbours[LEFT] = -1;
c->neighbours[RIGHT] = -1;
c->coords[IDIM] = 0;
c->coords[JDIM] = c->rank;
c->dims[IDIM] = 1;
c->dims[JDIM] = c->size;
#else
c->imaxLocal = imax;
c->jmaxLocal = jmax;
@@ -182,15 +194,33 @@ void commPartition(Comm* c, int jmax, int imax)
void commUpdateDatatypes(Comm* oldcomm, Comm* newcomm, int imaxLocal, int jmaxLocal)
{
Comm* newcomm;
#if defined _MPI
newcomm->comm = MPI_COMM_NULL;
int result = MPI_Comm_dup(oldcomm->comm, &newcomm->comm);
int result = MPI_Comm_dup(MPI_COMM_WORLD, &newcomm->comm);
if (result == MPI_ERR_COMM) {
printf("\nNull communicator. Duplication failed !!\n");
}
newcomm->rank = oldcomm->rank;
newcomm->size = oldcomm->size;
newcomm->imaxLocal = imaxLocal / 2;
newcomm->jmaxLocal = jmaxLocal / 2;
newcomm->neighbours[BOTTOM] = newcomm->rank == 0 ? -1 : newcomm->rank - 1;
newcomm->neighbours[TOP] = newcomm->rank == (newcomm->size - 1) ? -1 : newcomm->rank + 1;
newcomm->neighbours[LEFT] = -1;
newcomm->neighbours[RIGHT] = -1;
newcomm->coords[IDIM] = 0;
newcomm->coords[JDIM] = newcomm->rank;
newcomm->dims[IDIM] = 1;
newcomm->dims[JDIM] = newcomm->size;
#endif
newcomm->imaxLocal = imaxLocal;
newcomm->jmaxLocal = jmaxLocal;

33
BasicSolver/2D-mpi/src/comm-v2.c
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@@ -4,18 +4,18 @@
* Use of this source code is governed by a MIT style
* license that can be found in the LICENSE file.
*/
#include "comm.h"
#include <stdio.h>
#include <stdlib.h>
#include "comm.h"
#include <string.h>
#ifdef _MPI
// subroutines local to this module
static int sum(int* sizes, int position)
static int sum(int* sizes, int init, int offset, int coord)
{
int sum = 0;
for (int i = 0; i < position; i++) {
for (int i = init - offset; coord > 0; i -= offset, --coord) {
sum += sizes[i];
}
@@ -79,8 +79,8 @@ static void assembleResult(Comm* c, double* src, double* dst, int imax, int jmax
int newSizes[NDIMS] = { newSizesJ[i], newSizesI[i] };
int coords[NDIMS];
MPI_Cart_coords(c->comm, i, NDIMS, coords);
int starts[NDIMS] = { sum(newSizesJ, coords[JDIM]),
sum(newSizesI, coords[IDIM]) };
int starts[NDIMS] = { sum(newSizesJ, i, 1, coords[JDIM]),
sum(newSizesI, i, c->dims[JDIM], coords[IDIM]) };
printf(
"Rank: %d, Coords(i,j): %d %d, Size(i,j): %d %d, Target Size(i,j): %d %d "
"Starts(i,j): %d %d\n",
@@ -290,14 +290,21 @@ void commUpdateDatatypes(Comm* oldcomm, Comm* newcomm, int imaxLocal, int jmaxLo
{
#if defined _MPI
newcomm->comm = MPI_COMM_NULL;
int result = MPI_Comm_dup(oldcomm->comm, &newcomm->comm);
int result = MPI_Comm_dup(oldcomm->comm, &newcomm->comm);
if (result == MPI_ERR_COMM) {
printf("\nNull communicator. Duplication failed !!\n");
}
newcomm->imaxLocal = imaxLocal;
newcomm->jmaxLocal = jmaxLocal;
newcomm->rank = oldcomm->rank;
newcomm->size = oldcomm->size;
memcpy(&newcomm->neighbours, &oldcomm->neighbours, sizeof(oldcomm->neighbours));
memcpy(&newcomm->coords, &oldcomm->coords, sizeof(oldcomm->coords));
memcpy(&newcomm->dims, &oldcomm->dims, sizeof(oldcomm->dims));
newcomm->imaxLocal = imaxLocal/2;
newcomm->jmaxLocal = jmaxLocal/2;
MPI_Datatype jBufferType;
MPI_Type_contiguous(imaxLocal, MPI_DOUBLE, &jBufferType);
@@ -329,7 +336,7 @@ void commUpdateDatatypes(Comm* oldcomm, Comm* newcomm, int imaxLocal, int jmaxLo
void commFreeCommunicator(Comm* comm)
{
#ifdef _MPI
MPI_Comm_free(&comm->comm);
#endif
#ifdef _MPI
MPI_Comm_free(&comm->comm);
#endif
}

24
BasicSolver/2D-mpi/src/comm-v3.c
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@@ -11,11 +11,11 @@
#ifdef _MPI
// subroutines local to this module
static int sum(int* sizes, int position)
static int sum(int* sizes, int init, int offset, int coord)
{
int sum = 0;
for (int i = 0; i < position; i++) {
for (int i = init - offset; coord > 0; i -= offset, --coord) {
sum += sizes[i];
}
@@ -79,8 +79,8 @@ static void assembleResult(Comm* c, double* src, double* dst, int imax, int jmax
int newSizes[NDIMS] = { newSizesJ[i], newSizesI[i] };
int coords[NDIMS];
MPI_Cart_coords(c->comm, i, NDIMS, coords);
int starts[NDIMS] = { sum(newSizesJ, coords[JDIM]),
sum(newSizesI, coords[IDIM]) };
int starts[NDIMS] = { sum(newSizesJ, i, 1, coords[JDIM]),
sum(newSizesI, i, c->dims[JDIM], coords[IDIM]) };
printf(
"Rank: %d, Coords(i,j): %d %d, Size(i,j): %d %d, Target Size(i,j): %d %d "
"Starts(i,j): %d %d\n",
@@ -271,14 +271,18 @@ void commUpdateDatatypes(Comm* oldcomm, Comm* newcomm, int imaxLocal, int jmaxLo
{
#if defined _MPI
int result = MPI_Comm_dup(oldcomm->comm, &newcomm->comm);
int result = MPI_Comm_dup(oldcomm->comm, &newcomm->comm);
if (result == MPI_ERR_COMM) {
printf("\nNull communicator. Duplication failed !!\n");
}
newcomm->imaxLocal = imaxLocal;
newcomm->jmaxLocal = jmaxLocal;
newcomm->rank = oldcomm->rank;
newcomm->size = oldcomm->size;
newcomm->imaxLocal = imaxLocal / 2;
newcomm->jmaxLocal = jmaxLocal / 2;
MPI_Datatype jBufferType;
MPI_Type_contiguous(imaxLocal, MPI_DOUBLE, &jBufferType);
@@ -310,7 +314,7 @@ void commUpdateDatatypes(Comm* oldcomm, Comm* newcomm, int imaxLocal, int jmaxLo
void commFreeCommunicator(Comm* comm)
{
#ifdef _MPI
MPI_Comm_free(&comm->comm);
#endif
#ifdef _MPI
MPI_Comm_free(&comm->comm);
#endif
}

12
BasicSolver/2D-mpi/src/main.c
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@@ -49,6 +49,9 @@ int main(int argc, char** argv)
commInit(&d.comm, argc, argv);
initParameter(&p);
FILE* fp;
if (commIsMaster(&d.comm)) fp = initResidualWriter();
if (argc != 2) {
printf("Usage: %s <configFile>\n", argv[0]);
exit(EXIT_SUCCESS);
@@ -79,16 +82,21 @@ int main(int argc, char** argv)
double tau = d.tau;
double te = d.te;
double t = 0.0;
double res = 0.0;
timeStart = getTimeStamp();
while (t <= te) {
if (tau > 0.0) computeTimestep(&d);
setBoundaryConditions(&d);
setSpecialBoundaryCondition(&d);
computeFG(&d);
computeRHS(&d);
solve(&s, d.p, d.rhs);
res = solve(&s, d.p, d.rhs);
adaptUV(&d);
if (commIsMaster(&d.comm)) writeResidual(fp, t, res);
t += d.dt;
#ifdef VERBOSE
@@ -106,7 +114,7 @@ int main(int argc, char** argv)
if (commIsMaster(s.comm)) {
printf("Solution took %.2fs\n", timeStop - timeStart);
}
if (commIsMaster(&d.comm)) fclose(fp);
writeResults(&d);
commFinalize(s.comm);
return EXIT_SUCCESS;

21
BasicSolver/2D-mpi/src/progress.c
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@@ -8,7 +8,7 @@
#include <mpi.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "progress.h"
static double _end;
@@ -49,3 +49,22 @@ void stopProgress()
printf("\n");
fflush(stdout);
}
FILE* initResidualWriter()
{
FILE* fp;
fp = fopen("residual.dat", "w");
if (fp == NULL) {
printf("Error!\n");
exit(EXIT_FAILURE);
}
return fp;
}
void writeResidual(FILE* fp, double ts, double res)
{
fprintf(fp, "%f, %f\n", ts, res);
}

3
BasicSolver/2D-mpi/src/progress.h
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@@ -10,5 +10,6 @@
extern void initProgress(double);
extern void printProgress(double);
extern void stopProgress();
extern FILE* initResidualWriter(void);
extern void writeResidual(FILE*, double, double);
#endif

18
BasicSolver/2D-mpi/src/solver-mg.c
View File

@@ -14,9 +14,9 @@
#define FINEST_LEVEL 0
#define COARSEST_LEVEL (s->levels - 1)
// #define S(i, j) s[(j) * (imaxLocal + 2) + (i)]
#define E(i, j) e[(j) * (imaxLocal + 2) + (i)]
#define R(i, j) r[(j) * (imaxLocal + 2) + (i)]
#define OLD(i, j) old[(j) * (imaxLocal + 2) + (i)]
#define E(i, j) e[(j) * (imaxLocal + 2) + (i)]
#define R(i, j) r[(j) * (imaxLocal + 2) + (i)]
#define OLD(i, j) old[(j) * (imaxLocal + 2) + (i)]
static void restrictMG(Solver* s, int level, Comm* comm)
{
@@ -109,7 +109,6 @@ static void setBoundaryCondition(Solver* s, double* p, int imaxLocal, int jmaxLo
#endif
}
static double smooth(Solver* s, double* p, double* rhs, int level, Comm* comm)
{
int imaxLocal = comm->imaxLocal;
@@ -144,8 +143,7 @@ static double smooth(Solver* s, double* p, double* rhs, int level, Comm* comm)
P(i, j) -= factor *
(RHS(i, j) -
((P(i + 1, j) - 2.0 * P(i, j) + P(i - 1, j)) * idx2 +
(P(i, j + 1) - 2.0 * P(i, j) + P(i, j - 1)) *
idy2));
(P(i, j + 1) - 2.0 * P(i, j) + P(i, j - 1)) * idy2));
}
isw = 3 - isw;
}
@@ -231,10 +229,10 @@ static double multiGrid(Solver* s, double* p, double* rhs, int level, Comm* comm
restrictMG(s, level, comm);
Comm newcomm;
commUpdateDatatypes(s->comm, &newcomm, comm->imaxLocal / 2, comm->jmaxLocal / 2);
commUpdateDatatypes(s->comm, &newcomm, comm->imaxLocal, comm->jmaxLocal);
// MGSolver on residual and error.
// TODO: What if there is a rest?
multiGrid(s, s->e[level + 1], s->r[level + 1], level + 1, &newcomm);
commFreeCommunicator(&newcomm);
@@ -290,7 +288,7 @@ void initSolver(Solver* s, Discretization* d, Parameter* p)
}
}
void solve(Solver* s, double* p, double* rhs)
double solve(Solver* s, double* p, double* rhs)
{
double res = multiGrid(s, p, rhs, 0, s->comm);
@@ -299,4 +297,6 @@ void solve(Solver* s, double* p, double* rhs)
printf("Residuum: %.6f\n", res);
}
#endif
return res;
}

4
BasicSolver/2D-mpi/src/solver-rb.c
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@@ -23,7 +23,7 @@ void initSolver(Solver* s, Discretization* d, Parameter* p)
s->comm = &d->comm;
}
void solve(Solver* s, double* p, double* rhs)
double solve(Solver* s, double* p, double* rhs)
{
int imax = s->grid->imax;
int jmax = s->grid->jmax;
@@ -101,4 +101,6 @@ void solve(Solver* s, double* p, double* rhs)
printf("Solver took %d iterations to reach %f\n", it, sqrt(res));
}
#endif
return res;
}

2
BasicSolver/2D-mpi/src/solver.h
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@@ -25,5 +25,5 @@ typedef struct {
} Solver;
void initSolver(Solver*, Discretization*, Parameter*);
void solve(Solver*, double*, double*);
double solve(Solver*, double*, double*);
#endif