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chi_barycenter_GPU.cu
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Wed, May 22, 10:24
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Fri, May 24, 10:24 (2 d)
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R1448 Lenstool-HPC
chi_barycenter_GPU.cu
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#include <iostream>
#include <string.h>
//#include <cuda_runtime.h>
#include <math.h>
#include <sys/time.h>
#include <fstream>
#include <unistd.h>
#include <assert.h>
#ifndef __xlC__
#warning "gnu compilers"
#include <immintrin.h>
#endif
//#include "simd_math.h"
#include "chi_CPU.hpp"
//#ifdef __WITH_GPU
#include "grid_gradient_GPU.cuh"
////#endif
//#include "gradient_GPU.cuh"
#ifdef _OPENMP
#include <omp.h>
#endif
#ifdef __WITH_MPI
#warning "MPI enabled"
#include <mpi.h>
#include "mpi_check.h"
#endif
#include "delense_CPU_utils.hpp"
#include "delense_CPU.hpp"
#include "delense_GPU.cuh"
#include "chi_comm.hpp"
#include "chi_computation.hpp"
#ifdef __WITH_GPU
#include <cuda_runtime.h>
#include "cudafunctions.cuh"
#endif
#define MIN(a,b) (((a)<(b))?(a):(b))
#define MAX(a,b) (((a)>(b))?(a):(b))
//
//
//
double myseconds()
{
struct timeval tp;
struct timezone tzp;
int i;
i = gettimeofday(&tp,&tzp);
return ( (double) tp.tv_sec + (double) tp.tv_usec * 1.e-6 );
}
void mychi_bruteforce_SOA_GPU_grid_gradient_barycentersource(double *chi, int *error, runmode_param *runmode, const struct Potential_SOA *lens, const struct grid_param *frame, const int *nimages_strongLensing, galaxy *images)
{
//
//double dx, dy; //, x_pos, y_pos; //pixelsize
//
// double im_dist[MAXIMPERSOURCE]; // distance to a real image for an "theoretical" image found from a theoretical source
// int im_index; // index of the closest real image for an image found from a theoretical source
// int second_closest_id; // index of the second closest real image for an image found from a theoretical source
// int thread_found_image = 0; // at each iteration in the lens plane, turn to 1 whether the thread find an image
// struct point im_position, temp; // position of the image found from a theoretical source + temp variable for comparison
// struct triplet Tsup, Tinf, Tsupsource, Tinfsource;// triangles for the computation of the images created by the theoretical sources
//
unsigned int nsets = runmode->nsets;
//
struct galaxy sources[nsets]; // theoretical sources (common for a set)
int nimagesfound [nsets][MAXIMPERSOURCE]; // number of images found from the theoretical sources
int locimagesfound[nsets];
//int* locimagesfound = (int*) malloc(nsets*sizeof(int));
struct point image_pos [nsets][MAXIMPERSOURCE];
//struct point* image_pos = (struct point*) malloc(nsets*MAXIMPERSOURCE*sizeof(struct point));
//double image_dist [nsets][runmode->nimagestot][MAXIMPERSOURCE];
struct point tim [MAXIMPERSOURCE]; // theoretical images (computed from sources)
//
int world_size = 1;
int world_rank = 0;
#ifdef __WITH_MPI
MPI_Comm_size(MPI_COMM_WORLD, &world_size);
MPI_Comm_rank(MPI_COMM_WORLD, &world_rank);
MPI_Barrier(MPI_COMM_WORLD);
#endif
unsigned int verbose = (world_rank == 0);
//
int grid_size = runmode->nbgridcells;
int loc_grid_size = runmode->nbgridcells/world_size;
//
double y_len = fabs(frame->ymax - frame->ymin);
int y_len_loc = runmode->nbgridcells/world_size;
int y_pos_loc = (int) world_rank*y_len_loc;
int y_bound = y_len_loc;
//
if ((world_rank + 1) != world_size) y_bound++;
//
//
const double dx = (frame->xmax - frame->xmin)/(runmode->nbgridcells - 1);
const double dy = (frame->ymax - frame->ymin)/(runmode->nbgridcells - 1);
//
double *grid_gradient_x, *grid_gradient_y;
//
//grid_gradient_x = (double *)malloc((int) grid_size*loc_grid_size*sizeof(double));
//grid_gradient_y = (double *)malloc((int) grid_size*loc_grid_size*sizeof(double));
//grid_gradient_x = (double *)malloc((int) grid_size*y_bound*sizeof(double));
//grid_gradient_y = (double *)malloc((int) grid_size*y_bound*sizeof(double));
#ifdef __WITH_GPU
cudaMallocManaged(&grid_gradient_x, grid_size*y_bound*sizeof(double));
cudasafe(cudaGetLastError(), "grid_gradient_x allocation");
cudaMallocManaged(&grid_gradient_y, grid_size*y_bound*sizeof(double));
cudasafe(cudaGetLastError(), "grid_gradient_y allocation");
#else
grid_gradient_x = (double *)malloc((int) grid_size*y_bound*sizeof(double));
grid_gradient_y = (double *)malloc((int) grid_size*y_bound*sizeof(double));
#endif
//
const int grid_dim = runmode->nbgridcells;
//Packaging the image to sourceplane conversion
double time = -myseconds();
double grad_time = -myseconds();
//gradient_grid_CPU(grid_gradient_x, grid_gradient_y, frame, lens, runmode->nhalos, grid_dim);
#ifdef __WITH_GPU
//@@printf("Using GPUs...\n"); fflush(stdout);
#ifdef __WITH_UM
//@@printf("Unified memory...\n"); fflush(stdout);
gradient_grid_GPU_UM(grid_gradient_x, grid_gradient_y, frame, lens, runmode->nhalos, dx, dy, grid_size, y_bound, 0, y_pos_loc);
#else
gradient_grid_GPU(grid_gradient_x, grid_gradient_y, frame, lens, runmode->nhalos, dx, dy, grid_size, y_bound, 0, y_pos_loc);
#endif
//gradient_grid_GPU(grid_gradient_x, grid_gradient_y, frame, lens, runmode->nhalos, grid_size);
#else
int zero = 0;
gradient_grid_CPU(grid_gradient_x, grid_gradient_y, frame, lens, runmode->nhalos, dx, dy, grid_size, y_bound, zero, y_pos_loc);
#endif
//gradient_grid_CPU(grid_gradient_x, grid_gradient_y, frame, lens, runmode->nhalos, grid_size, loc_grid_size);
#ifdef __WITH_MPI
MPI_Barrier(MPI_COMM_WORLD);
#endif
grad_time += myseconds();
//
int index = 0; // index tracks the image within the total image array in the image plane
*chi = 0;
//
double chi2_time = 0.;
double delense_time = 0.;
double image_time = 0.;
//
int images_found = 0;
long int images_total = 0;
//
//printf("@@nsets = %d nx = %d ny = %d, xmin = %f, dx = %f, ymin = %f, dy = %f\n", nsets, runmode->nbgridcells, runmode->nbgridcells, frame->xmin, dx, frame->ymin, dy );
//
int numsets = 0;
//
for( int source_id = 0; source_id < nsets; source_id ++)
numsets += nimages_strongLensing[source_id];
//
time = -myseconds();
//
// nsets : number of images in the source plane
// nimagestot: number of images in the image plane
//
//
// Image Lensing
//
image_time -= myseconds();
//
//unsigned int nsets = nsets;
//
for( int source_id = 0; source_id < nsets; source_id ++)
{
// number of images in the image plane for the specific image (1,3,5...)
unsigned short int nimages = nimages_strongLensing[source_id];
//@@printf("@@ source_id = %d, nimages = %d\n", source_id, nimages_strongLensing[source_id]);
//Init sources
sources[source_id].center.x = sources[source_id].center.y = 0.;
//____________________________ image (constrains) loop ________________________________
for(unsigned short int image_id = 0; image_id < nimages; image_id++)
{
//
struct galaxy sources_temp;
struct point Grad = module_potentialDerivatives_totalGradient_SOA(&images[index + image_id].center, lens, runmode->nhalos);
//
// find the position of the constrain in the source plane
sources_temp.center.x = images[index + image_id].center.x - images[index + image_id].dr*Grad.x;
sources_temp.center.y = images[index + image_id].center.y - images[index + image_id].dr*Grad.y;
//________ Adding up for barycenter comp _________
sources[source_id].center.x += sources_temp.center.x;
sources[source_id].center.y += sources_temp.center.y;
//time += myseconds();
sources[source_id].redshift = 0.;
sources[source_id].shape.a = sources[source_id].shape.b = sources[source_id].shape.theta = (type_t) 0.;
sources[source_id].mag = 0.;
//
}
//________ Dividing by nimages for final barycenter result _________
sources[source_id].center.x /= nimages;
sources[source_id].center.y /= nimages;
sources[source_id].redshift = images[index].redshift;
sources[source_id].dr = images[index].dr;
sources[source_id].dls = images[index].dls;
sources[source_id].dos = images[index].dos;
//#if 1
index += nimages;
}
#ifdef __WITH_MPI
MPI_Barrier(MPI_COMM_WORLD);
#endif
image_time += myseconds();
//
// Delensing
//
delense_time -= myseconds();
index = 0;
int numimg = 0;
#ifndef __WITH_GPU
delense_barycenter(&image_pos[0][0], &locimagesfound[0], &numimg, runmode, lens, frame, nimages_strongLensing, sources, grid_gradient_x, grid_gradient_y);
#else
//delense_barycenter_GPU(&image_pos[0][0], &locimagesfound[0], &numimg, runmode, lens, frame, nimages_strongLensing, sources, grid_gradient_x, grid_gradient_y);
//struct point* ip[MAXIMPERSOURCE] = image_pos;
delense_barycenter_GPU(&image_pos[0][0], &locimagesfound[0], &numimg, runmode, lens, frame, nimages_strongLensing, sources, grid_gradient_x, grid_gradient_y);
printf("done. numimg = %d\n", numimg);fflush(stdout);
#endif
//
// Communications
//
#ifdef __WITH_MPI
MPI_Barrier(MPI_COMM_WORLD);
#endif
delense_time += myseconds();
//
double comm_time = -myseconds();
//
int numimagesfound [nsets];
struct point imagesposition [nsets][MAXIMPERSOURCE];
//
memset(&numimagesfound, 0, nsets*sizeof(int));
memset(&imagesposition, 0, nsets*MAXIMPERSOURCE*sizeof(point));
//
delense_comm(&numimagesfound[0], &imagesposition[0][0], &numimg, nimages_strongLensing, &locimagesfound[0], &image_pos[0][0], nsets, world_rank, world_size);
//
comm_time += myseconds();
//
// image extraction to compute
//
chi2_time = -myseconds();
if (verbose)
chi_computation(chi, &images_found, &numimagesfound[0], &imagesposition[0][0], nimages_strongLensing, images, nsets);
#ifdef __WITH_GPU
MPI_Barrier(MPI_COMM_WORLD);
#endif
//
chi2_time += myseconds();
time += myseconds();
//
if (verbose)
{
//
// int nthreads = 1;
//
//#pragma omp parallel
// nthreads = omp_get_num_threads();
//
printf(" overall time = %f s.\n", time);
printf(" - grad time = %f s.\n", grad_time);
printf(" - image time = %f s.\n", image_time);
printf(" - delense time = %f s.\n", delense_time);
printf(" - comm time = %f s.\n", comm_time);
printf(" - chi2 time = %f s.\n", chi2_time);
//
printf(" images found: %d out of %ld\n", images_found, images_total);
}
//
#ifdef __WITH_GPU
cudaFree(grid_gradient_x);
cudaFree(grid_gradient_y);
#else
free(grid_gradient_x);
free(grid_gradient_y);
#endif
}
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