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[simgrid.git] / examples / smpi / gemm / gemm.c

diff --git a/examples/smpi/gemm/gemm.c b/examples/smpi/gemm/gemm.c
index 3e1580c..b9f0635 100644 (file)
--- a/examples/smpi/gemm/gemm.c
+++ b/examples/smpi/gemm/gemm.c
@@ -1,4 +1,4 @@
-/* Copyright (c) 2019-2021. The SimGrid Team. All rights reserved.          */
+/* Copyright (c) 2019-2023. The SimGrid Team. All rights reserved.          */
 
 /* This program is free software; you can redistribute it and/or modify it
  * under the terms of the license (GNU LGPL) which comes with this package. */
@@ -12,32 +12,32 @@
 /*#*/
 /*# ==================================================================================================*/
 
-#include "stdio.h"
-#include "mpi.h"
+#include <mpi.h>
+#include <stdio.h>
 
-void multiply(float* a, float* b, float* c, int istart, int iend, int size);
-void multiply_sampled(float* a, float* b, float* c, int istart, int iend, int size);
-
-
-void multiply(float* a, float* b, float* c, int istart, int iend, int size)
+static void multiply(const float* a, const float* b, float* c, int istart, int iend, int size)
 {
     for (int i = istart; i <= iend; ++i) {
         for (int j = 0; j < size; ++j) {
-            for (int k = 0; k < size; ++k) {
-                c[i*size+j] += a[i*size+k] * b[k*size+j];
-            }
+          float sum = 0.0;
+          for (int k = 0; k < size; ++k) {
+            sum += a[i * size + k] * b[k * size + j];
+          }
+          c[i * size + j] += sum;
         }
     }
 }
 
-void multiply_sampled(float* a, float* b, float* c, int istart, int iend, int size)
+static void multiply_sampled(const float* a, const float* b, float* c, int istart, int iend, int size)
 {
     //for (int i = istart; i <= iend; ++i) {
     SMPI_SAMPLE_GLOBAL (int i = istart, i <= iend, ++i, 10, 0.005){
         for (int j = 0; j < size; ++j) {
-            for (int k = 0; k < size; ++k) {
-                c[i*size+j] += a[i*size+k] * b[k*size+j];
-            }
+          float sum = 0.0;
+          for (int k = 0; k < size; ++k) {
+            sum += a[i * size + k] * b[k * size + j];
+          }
+          c[i * size + j] += sum;
         }
     }
 }
@@ -51,7 +51,7 @@ int main(int argc, char* argv[])
     MPI_Init(&argc, &argv);
     MPI_Comm_size(MPI_COMM_WORLD, &nproc);
     MPI_Comm_rank(MPI_COMM_WORLD, &rank);
-    
+
     if(argc<2){
       if (rank == 0)
         printf("Usage : gemm size \"native/sampling\"\n");
@@ -73,7 +73,6 @@ int main(int argc, char* argv[])
     float *b = (float*)malloc(sizeof(float)*size*size);
     float *c = (float*)malloc(sizeof(float)*size*size);
 
-  
     MPI_Barrier(MPI_COMM_WORLD);
     start = MPI_Wtime();
 
@@ -130,7 +129,7 @@ int main(int argc, char* argv[])
                 multiply_sampled(a, b, c, (size/nproc)*nproc, size-1, size);
         }
     }
-    
+
     MPI_Barrier(MPI_COMM_WORLD);
     end = MPI_Wtime();
 
@@ -151,7 +150,6 @@ int main(int argc, char* argv[])
             sec_per_matrix_mul,
             flops_per_matrix_mul);
     }
-   
 
     return 0;
 }