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#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <stdint.h>
#include <omp.h>
#include "../../support/matrix.h"
#include "../../support/params.h"
#include "../../support/timer.h"
#include "../../support/utils.h"
int main(int argc, char** argv) {
// Process parameters
struct Params p = input_params(argc, argv);
// Initialize SpMV data structures
PRINT_INFO(p.verbosity >= 1, "Reading matrix %s", p.fileName);
struct COOMatrix cooMatrix = readCOOMatrix(p.fileName);
PRINT_INFO(p.verbosity >= 1, " %u rows, %u columns, %u nonzeros", cooMatrix.numRows, cooMatrix.numCols, cooMatrix.numNonzeros);
struct CSRMatrix csrMatrix = coo2csr(cooMatrix);
float* inVector = malloc(csrMatrix.numCols*sizeof(float));
float* outVector = malloc(csrMatrix.numRows*sizeof(float));
initVector(inVector, csrMatrix.numCols);
// Calculating result on CPU
PRINT_INFO(p.verbosity >= 1, "Calculating result on CPU");
omp_set_num_threads(4);
Timer timer;
startTimer(&timer);
#pragma omp parallel for
for(uint32_t rowIdx = 0; rowIdx < csrMatrix.numRows; ++rowIdx) {
float sum = 0.0f;
for(uint32_t i = csrMatrix.rowPtrs[rowIdx]; i < csrMatrix.rowPtrs[rowIdx + 1]; ++i) {
uint32_t colIdx = csrMatrix.nonzeros[i].col;
float value = csrMatrix.nonzeros[i].value;
sum += inVector[colIdx]*value;
}
outVector[rowIdx] = sum;
}
stopTimer(&timer);
if(p.verbosity == 0) PRINT("%f", getElapsedTime(timer)*1e3);
PRINT_INFO(p.verbosity >= 1, " Elapsed time: %f ms", getElapsedTime(timer)*1e3);
// Deallocate data structures
freeCOOMatrix(cooMatrix);
freeCSRMatrix(csrMatrix);
free(inVector);
free(outVector);
return 0;
}
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