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Math #14

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Math #14

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4e23c62
Add impl with all done tests
Extra5enS Oct 3, 2020
1ceffe2
b
Extra5enS Nov 12, 2020
ffacf37
Merge branch 'master' of https://github.com/lisitsynSA/ParProg2020 in…
Extra5enS Nov 12, 2020
a7fb4b3
2 task main part
Extra5enS Nov 13, 2020
6f7c506
start addition
Extra5enS Nov 14, 2020
4c96eaa
done
Extra5enS Nov 14, 2020
7476b82
I impl
Extra5enS Nov 16, 2020
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119 changes: 113 additions & 6 deletions CompMath1/src/main.cpp
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Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -5,13 +5,12 @@
#include <unistd.h>
#include <cmath>

double acceleration(double t)
{
return sin(t);
}
#define ROOT 0

void calc(double* trace, uint32_t traceSize, double t0, double dt, double y0, double y1, int rank, int size)
{
double acceleration(double t) {
return sin(t);
}
/*
// Sighting shot
double v0 = 0;
if (rank == 0 && size > 0)
Expand All @@ -35,7 +34,115 @@ void calc(double* trace, uint32_t traceSize, double t0, double dt, double y0, do
trace[i] = dt*dt*acceleration(t0 + (i - 1)*dt) + 2*trace[i - 1] - trace[i - 2];
}
}


*/

void calc(double* trace, uint32_t traceSize, double t0, double dt, double y0, double y1, int rank, int size)
{
int* recv_dist = NULL;
int* recv_range = NULL;

int real_rank_size = 0;

if(rank == ROOT) {
size_t my_calc_size = std::max(ceil((traceSize) * 1.0 / size), 3.0);
// if proc_rank > ceil(traceSize / my_calc_size) it will do nothing
real_rank_size = ceil((traceSize) * 1.0 / my_calc_size);
size_t now_size = 0;

recv_dist = (int*)calloc(size, sizeof(int));
recv_range = (int*)calloc(size, sizeof(int));

for(int i = 0; i < real_rank_size; ++i) {
recv_dist[i] = i * my_calc_size;
recv_range[i] = std::min(my_calc_size, traceSize - now_size);
now_size += std::min(my_calc_size, traceSize - now_size);
}

for(int i = 1; i < real_rank_size; ++i) {
recv_dist[i] -= 1;
recv_range[i] += 1;
}
for(int i = 0; i < real_rank_size - 1; ++i) {
recv_range[i] += 1;
}
}
int recv_step = 0;
int my_delta_t = 0;

MPI_Scatter(
recv_range, 1, MPI_INT,
&recv_step, size, MPI_INT,
ROOT, MPI_COMM_WORLD);

MPI_Scatter(
recv_dist, 1, MPI_INT,
&my_delta_t, size, MPI_INT,
ROOT, MPI_COMM_WORLD);

double* my_trace = (double*)calloc(recv_step, sizeof(double));
// [0](math)(start_cond) -> [1](math)(start_cond) -> [2](math(start_cond)) -> ...

// Sighting shot
double my_y0 = 0;
double my_y1 = 0;

printf("[%d] step = %d\n", rank, recv_step);

if(rank == ROOT) {
MPI_Send(&y0, 1, MPI_DOUBLE, ROOT, 0, MPI_COMM_WORLD);
MPI_Send(&y0, 1, MPI_DOUBLE, ROOT, 0, MPI_COMM_WORLD);
}

MPI_Recv(&my_y0, 1, MPI_DOUBLE, MPI_ANY_SOURCE, 0, MPI_COMM_WORLD, NULL);
MPI_Recv(&my_y1, 1, MPI_DOUBLE, MPI_ANY_SOURCE, 0, MPI_COMM_WORLD, NULL);
my_trace[0] = my_y0;
my_trace[1] = my_y1;
for (uint32_t i = 2; i < (uint32_t)recv_step; i++) {
my_trace[i] = dt*dt*acceleration(t0 + (my_delta_t + i - 1)*dt) + 2*my_trace[i - 1] - my_trace[i - 2];
}
if(rank != size - 1) {
MPI_Send(&my_trace[recv_step - 2], 1, MPI_DOUBLE, rank + 1, 0, MPI_COMM_WORLD);
MPI_Send(&my_trace[recv_step - 1], 1, MPI_DOUBLE, rank + 1, 0, MPI_COMM_WORLD);
} else {
// send smth in y1 place!
MPI_Send(&my_trace[recv_step - 1], 1, MPI_DOUBLE, ROOT, 0, MPI_COMM_WORLD);
}

// The final shot
double last_y = 0;
if(rank == ROOT) {
MPI_Recv(&last_y, 1, MPI_DOUBLE, MPI_ANY_SOURCE, 0, MPI_COMM_WORLD, NULL);

MPI_Send(&y0, 1, MPI_DOUBLE, ROOT, 0, MPI_COMM_WORLD);
next_y0 = y0 + (y1 - last_y)/(1.0 * traceSize);
MPI_Send(&next_y0, 1, MPI_DOUBLE, ROOT, 0, MPI_COMM_WORLD);
}

MPI_Recv(&my_y0, 1, MPI_DOUBLE, MPI_ANY_SOURCE, 0, MPI_COMM_WORLD, NULL);
MPI_Recv(&my_y1, 1, MPI_DOUBLE, MPI_ANY_SOURCE, 0, MPI_COMM_WORLD, NULL);
my_trace[0] = my_y0;
my_trace[1] = my_y1;

for (uint32_t i = 2; i < (uint32_t)recv_step; i++) {
my_trace[i] = dt*dt*acceleration(t0 + (my_delta_t + i - 1)*dt) + 2*my_trace[i - 1] - my_trace[i - 2];
}
if(rank != size - 1) {
MPI_Send(&my_trace[recv_step - 2], 1, MPI_DOUBLE, rank + 1, 0, MPI_COMM_WORLD);
MPI_Send(&my_trace[recv_step - 1], 1, MPI_DOUBLE, rank + 1, 0, MPI_COMM_WORLD);
}

MPI_Gatherv(
my_trace, recv_step, MPI_DOUBLE,
trace, recv_range, recv_dist, MPI_DOUBLE,
ROOT, MPI_COMM_WORLD);

free(my_trace);
if(rank == ROOT) {
free(recv_range);
free(recv_dist);
}
}

int main(int argc, char** argv)
Expand Down
231 changes: 146 additions & 85 deletions CompMath2/src/main.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -5,107 +5,168 @@
#include <unistd.h>
#include <cmath>

void calc(double* frame, uint32_t ySize, uint32_t xSize, double delta, int rank, int size)
{
if (rank == 0 && size > 0)
{
double diff = 0;
double* tmpFrame = new double[ySize * xSize];
// Prepare tmpFrame
for (uint32_t y = 0; y < ySize; y++)
{
tmpFrame[y*xSize] = frame[y*xSize];
tmpFrame[y*xSize + xSize - 1] = frame[y*xSize + xSize - 1];
}
for (uint32_t x = 1; x < xSize - 1; x++)
{
tmpFrame[x] = frame[x];
tmpFrame[(ySize - 1)*xSize + x] = frame[(ySize - 1)*xSize + x];
}
// Calculate first iteration
for (uint32_t y = 1; y < ySize - 1; y++)
{
for (uint32_t x = 1; x < xSize - 1; x++)
{
tmpFrame[y*xSize + x] = (frame[(y + 1)*xSize + x] + frame[(y - 1)*xSize + x] +\
frame[y*xSize + x + 1] + frame[y*xSize + x - 1])/4.0;
diff += std::abs(tmpFrame[y*xSize + x] - frame[y*xSize + x]);
}
}
#define ROOT 0

double* currFrame = tmpFrame;
double* nextFrame = frame;
uint32_t iteration = 1;
// Calculate frames
while (diff > delta)
{
diff = 0;
for (uint32_t y = 1; y < ySize - 1; y++)
{
for (uint32_t x = 1; x < xSize - 1; x++)
{
nextFrame[y*xSize + x] = (currFrame[(y + 1)*xSize + x] + currFrame[(y - 1)*xSize + x] +\
currFrame[y*xSize + x + 1] + currFrame[y*xSize + x - 1])/4.0;
diff += std::abs(nextFrame[y*xSize + x] - currFrame[y*xSize + x]);
void calc(double* frame, uint32_t ySize, uint32_t xSize, double delta, int rank, int size) {
int* send_dist = NULL;
int* send_range = NULL;

int* recv_dist = NULL;
int* recv_range = NULL;

double* new_frame = NULL;

MPI_Bcast(&ySize, 1, MPI_UNSIGNED, ROOT, MPI_COMM_WORLD);
MPI_Bcast(&xSize, 1, MPI_UNSIGNED, ROOT, MPI_COMM_WORLD);
int real_rank_size = 0;

if(rank == ROOT) {
size_t my_calc_size = ceil((ySize) * 1.0 / size);
// if proc_rank > ceil(ySize / my_calc_size) it will do nothing
real_rank_size = ceil((ySize) * 1.0 / my_calc_size);
size_t now_size = 0;

new_frame = (double*)calloc(xSize*ySize, sizeof(double));

recv_dist = (int*)calloc(size, sizeof(int));
recv_range = (int*)calloc(size, sizeof(int));

send_dist = (int*)calloc(size, sizeof(int));
send_range = (int*)calloc(size, sizeof(int));

for(int i = 0; i < real_rank_size; ++i) {
recv_dist[i] = i * xSize * my_calc_size;
recv_range[i] = xSize * std::min(my_calc_size, ySize - now_size);
now_size += std::min(my_calc_size, ySize - now_size);
}
}
std::swap(currFrame, nextFrame);
iteration++;

for(int i = 0; i < real_rank_size; ++i) {
if(real_rank_size == 1) {
send_range[i] = recv_range[i];
} else if(i == 0) {
send_range[i] = recv_range[i] + xSize;
} else if(i == real_rank_size - 1) {
send_range[i] = recv_range[i] + xSize;
send_dist[i] = recv_dist[i] - xSize;
} else {
send_range[i] = recv_range[i] + 2*xSize;
send_dist[i] = recv_dist[i] - xSize;
}
}
recv_dist[0] += xSize;
recv_range[0] -= xSize;
}

// Copy result from tmp
if (iteration % 2 == 1)
{
for (uint32_t i = 0; i < xSize*ySize; i++)
{
frame[i] = tmpFrame[i];
}
int send_step = 0;
int recv_step = 0;


// Bug with MPI <- i hate it! really!
MPI_Scatter(
send_range, 1, MPI_INT,
&send_step, size, MPI_INT,
ROOT, MPI_COMM_WORLD);
MPI_Scatter(
recv_range, 1, MPI_INT,
&recv_step, size, MPI_INT,
ROOT, MPI_COMM_WORLD);

double* my_calc = (double*)calloc(send_step, sizeof(double));
double* recv_calc = (double*)calloc(send_step, sizeof(double));
double diff = 0;
int stop = 0;
do {
MPI_Scatterv(
frame, send_range, send_dist, MPI_DOUBLE,
my_calc, send_step, MPI_DOUBLE,
ROOT, MPI_COMM_WORLD);
for(size_t y = 1; y < send_step * 1.0 / xSize - 1; ++y) {
for(size_t x = 1; x < xSize - 1; ++x) {
recv_calc[y * xSize + x] = (my_calc[(y + 1) * xSize + x] +\
my_calc[(y - 1) * xSize + x] +\
my_calc[y * xSize + x + 1] +\
my_calc[y * xSize + x - 1]) / 4.0;
}
}

MPI_Gatherv(
recv_calc + xSize, recv_step, MPI_DOUBLE,
new_frame, recv_range, recv_dist, MPI_DOUBLE,
ROOT, MPI_COMM_WORLD);

if(rank == ROOT) {
for (uint32_t y = 1; y < ySize - 1; y++) {
for (uint32_t x = 1; x < xSize - 1; x++) {
diff += std::abs(new_frame[y*xSize + x] - frame[y*xSize + x]);
}
}
if(diff <= delta) {
stop = 1;
} else {
stop = 0;
}
diff = 0;
for (uint32_t y = 1; y < ySize - 1; y++) {
for (uint32_t x = 1; x < xSize - 1; x++) {
frame[y*xSize + x] = new_frame[y*xSize + x];
}
}
}
MPI_Bcast(&stop, 1, MPI_INT, ROOT, MPI_COMM_WORLD);
//printf("[%d] diff = %lf\n", rank, diff);
} while(!stop);

free(my_calc);
free(recv_calc);
if(rank == ROOT) {
free(recv_dist);
free(recv_range);
free(send_dist);
free(send_range);
}
delete tmpFrame;
}
}

int main(int argc, char** argv)
{
int rank = 0, size = 0, status = 0;
double delta = 0;
uint32_t ySize = 0, xSize = 0;
double* frame = 0;
int rank = 0, size = 0, status = 0;
double delta = 0;
uint32_t ySize = 0, xSize = 0;
double* frame = 0;

MPI_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_Comm_size(MPI_COMM_WORLD, &size);
MPI_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_Comm_size(MPI_COMM_WORLD, &size);

if (rank == 0)
{
// Check arguments
if (argc != 3)
if (rank == 0)
{
std::cout << "[Error] Usage <inputfile> <output file>\n";
status = 1;
MPI_Bcast(&status, 1, MPI_INT, 0, MPI_COMM_WORLD);
return 1;
}
// Check arguments
if (argc != 3)
{
std::cout << "[Error] Usage <inputfile> <output file>\n";
status = 1;
MPI_Bcast(&status, 1, MPI_INT, 0, MPI_COMM_WORLD);
return 1;
}

// Prepare input file
std::ifstream input(argv[1]);
if (!input.is_open())
{
std::cout << "[Error] Can't open " << argv[1] << " for write\n";
status = 1;
MPI_Bcast(&status, 1, MPI_INT, 0, MPI_COMM_WORLD);
return 1;
}
// Prepare input file
std::ifstream input(argv[1]);
if (!input.is_open())
{
std::cout << "[Error] Can't open " << argv[1] << " for write\n";
status = 1;
MPI_Bcast(&status, 1, MPI_INT, 0, MPI_COMM_WORLD);
return 1;
}

// Read arguments from input
input >> ySize >> xSize >> delta;
MPI_Bcast(&status, 1, MPI_INT, 0, MPI_COMM_WORLD);
// Read arguments from input
input >> ySize >> xSize >> delta;
MPI_Bcast(&status, 1, MPI_INT, 0, MPI_COMM_WORLD);

frame = new double[ySize * xSize];
frame = new double[ySize * xSize];

for (uint32_t y = 0; y < ySize; y++)
{
for (uint32_t x = 0; x < xSize; x++)
for (uint32_t y = 0; y < ySize; y++)
{
for (uint32_t x = 0; x < xSize; x++)
{
input >> frame[y*xSize + x];
}
Expand Down
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