chundoong-lab-ta/SamsungDS22/HW4/mat_mul.cpp

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2022-09-29 18:01:45 +09:00
#include "mat_mul.h"
#include <cstdio>
#include <cstdlib>
#include <mpi.h>
static float *A, *B, *C;
static int M, N, K;
static int num_threads;
static int mpi_rank, mpi_world_size;
static void mat_mul_omp() {
// TODO: parallelize & optimize matrix multiplication
// Use num_threads per node
#pragma omp parallel for
for (int i = 0; i < M; ++i) {
for (int j = 0; j < N; ++j) {
for (int k = 0; k < K; ++k) {
C[i * N + j] += A[i * K + k] * B[k * N + j];
}
}
}
}
void mat_mul(float *_A, float *_B, float *_C, int _M, int _N, int _K,
int _num_threads, int _mpi_rank, int _mpi_world_size) {
A = _A, B = _B, C = _C;
M = _M, N = _N, K = _K;
num_threads = _num_threads, mpi_rank = _mpi_rank,
mpi_world_size = _mpi_world_size;
// TODO: parallelize & optimize matrix multiplication on multi-node
// You must allocate & initialize A, B, C for non-root processes
// FIXME: for now, only root process runs the matrix multiplication.
if (mpi_rank == 0)
mat_mul_omp();
}