81 lines
1.8 KiB
C
81 lines
1.8 KiB
C
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/time.h>
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#include <string.h>
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#include <math.h>
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#include "omp.h"
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#include "treetrav.h"
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long usecs (){
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struct timeval t;
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gettimeofday(&t,NULL);
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return t.tv_sec*1000000+t.tv_usec;
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}
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int main(int argc, char **argv){
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int l, nth, i;
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TreeNode *root;
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long t_start, t_end, save;
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if(argc!=3){
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printf("Wrong number of arguments.\n Usage:\n\n\
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./main l nthreads\n\n where l is the number of levels\n\
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and nthreads is the number of threads to use in the parallel code.\n");
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return 1;
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}
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l = atoi(argv[1]); /* levels in the tree */
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nth = atoi(argv[2]); /* the number of threads */
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treeinit(&root, l, 0);
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printf("\n\nSequential tree traversal\n");
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t_start = usecs();
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/* Do the sequential tree traversal */
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treetraverse_seq(root);
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t_end = usecs();
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printf("root->v : %ld\n",root->v);
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printf("time : %8.2f msec.\n",((double)t_end-t_start)/1000.0);
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printf("counts: ");
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for(i=0; i<nth; i++){
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printf("%d ",countnodes[i]);
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}
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save = root->v;
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/* Destroy and reinit the tree */
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treedestroy(root);
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treeinit(&root, l, 0);
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printf("\n\nParallel tree traversal with %2d threads\n",nth);
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t_start = usecs();
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/* Do the parallel tree traversal */
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treetraverse_par(root, nth);
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t_end = usecs();
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printf("root->v : %ld\n",root->v);
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printf("time : %8.2f msec.\n",((double)t_end-t_start)/1000.0);
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printf("counts: ");
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for(i=0; i<nth; i++){
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printf("%d ",countnodes[i]);
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}
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printf("\n");
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/* Destroy the tree */
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treedestroy(root);
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/* Check correctness */
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if(root->v != save){
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printf("\nERROR: The computed value is not correct!!! Seq=%ld != Par=%ld\n",
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save,root->v);
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} else {
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printf("\nThe result is correct\n");
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}
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return 0;
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}
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