centralized performance resources

ocw/1/matrix-multiply/testbed.c

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+/**
+ * Copyright (c) 2012 MIT License by 6.172 Staff
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ **/
+
+
+/**
+ * testbed.c:
+ *
+ * This file runs your code, timing its execution and printing out the result.
+ **/
+
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#include "./fasttime.h"
+#include "./matrix_multiply.h"
+
+
+int main(int argc, char** argv) {
+  int optchar = 0;
+  int show_usec = 0;
+  int should_print = 0;
+  int use_zero_matrix = 0;
+
+  // Always use the same seed, so that our tests are repeatable.
+  unsigned int randomSeed = 1;
+
+  matrix* A;
+  matrix* B;
+  matrix* C;
+
+  const int kMatrixSize = 4;
+
+
+  // Parse command line arguments
+  while ((optchar = getopt(argc, argv, "upz")) != -1) {
+    switch (optchar) {
+      case 'u':
+        show_usec = 1;
+        break;
+      case 'p':
+        should_print = 1;
+        break;
+      case 'z':
+        use_zero_matrix = 1;
+        break;
+      default:
+        printf("Ignoring unrecognized option: %c\n", optchar);
+        continue;
+    }
+  }
+
+  // This is a trick to make the memory bug leads to a wrong output.
+  int size = sizeof(int) * 4;
+  int* temp[20];
+
+  for (int i = 0; i < 20; i++) {
+    temp[i] = (int*)malloc(size);
+    memset(temp[i], 1, size);
+  }
+  int total = 0;
+  for (int i = 0; i < 20; i++) {
+    for (int j = 0; j < 4; j++) {
+      total += temp[i][j];
+    }
+  }
+  if (!total) printf("Trick to stop mallocs from being optimized out.");
+  for (int i = 0; i < 20; i++) {
+    free(temp[i]);
+  }
+
+  fprintf(stderr, "Setup\n");
+
+  A = make_matrix(kMatrixSize, kMatrixSize+1);
+  B = make_matrix(kMatrixSize, kMatrixSize);
+  C = make_matrix(kMatrixSize, kMatrixSize);
+
+  if (use_zero_matrix) {
+    for (int i = 0; i < A->rows; i++) {
+      for (int j = 0; j < A->cols; j++) {
+        A->values[i][j] = 0;
+      }
+    }
+    for (int i = 0; i < B->rows; i++) {
+      for (int j = 0; j < B->cols; j++) {
+        B->values[i][j] = 0;
+      }
+    }
+  } else {
+    for (int i = 0; i < A->rows; i++) {
+      for (int j = 0; j < A->cols; j++) {
+        A->values[i][j] = rand_r(&randomSeed) % 10;
+      }
+    }
+    for (int i = 0; i < B->rows; i++) {
+      for (int j = 0; j < B->cols; j++) {
+        B->values[i][j] = rand_r(&randomSeed) % 10;
+      }
+    }
+  }
+
+  if (should_print) {
+    printf("Matrix A: \n");
+    print_matrix(A);
+
+    printf("Matrix B: \n");
+    print_matrix(B);
+  }
+
+  fprintf(stderr, "Running matrix_multiply_run()...\n");
+
+  fasttime_t time1 = gettime();
+  matrix_multiply_run(A, B, C);
+  fasttime_t time2 = gettime();
+
+  if (should_print) {
+    printf("---- RESULTS ----\n");
+    printf("Result: \n");
+    print_matrix(C);
+    printf("---- END RESULTS ----\n");
+  }
+
+  if (show_usec) {
+    double elapsed = tdiff(time1, time2);
+    printf("Elapsed execution time: %f usec\n",
+           elapsed * (1000.0 * 1000.0));
+  } else {
+    double elapsed = tdiff(time1, time2);
+    printf("Elapsed execution time: %f sec\n", elapsed);
+  }
+
+  return 0;
+}