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main.c
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main.c
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#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <assert.h>
#include <unistd.h>
#include <pthread.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <fcntl.h>
#include IMPL
#define DICT_FILE "./dictionary/words.txt"
#define THREAD_NUM 4
static double diff_in_second(struct timespec t1, struct timespec t2)
{
struct timespec diff;
if (t2.tv_nsec-t1.tv_nsec < 0) {
diff.tv_sec = t2.tv_sec - t1.tv_sec - 1;
diff.tv_nsec = t2.tv_nsec - t1.tv_nsec + 1000000000;
} else {
diff.tv_sec = t2.tv_sec - t1.tv_sec;
diff.tv_nsec = t2.tv_nsec - t1.tv_nsec;
}
return (diff.tv_sec + diff.tv_nsec / 1000000000.0);
}
int main(int argc, char *argv[])
{
FILE *fp;
int i = 0;
char line[MAX_LAST_NAME_SIZE];
struct timespec start, end;
double cpu_time1, cpu_time2;
/* check file opening */
fp = fopen(DICT_FILE, "r");
if (!fp) {
printf("cannot open the file\n");
return -1;
}
#if defined(OPT)
int fd = open(DICT_FILE, O_RDWR | O_NONBLOCK);
FILE *fp_count = fopen(DICT_FILE,"r");
/* get the file size and malloc an entry pool and a detail pool*/
char line1[MAX_LAST_NAME_SIZE];
int lineNum;
while (fgets(line1, sizeof(line1), fp_count)) {
lineNum++;
}
printf("The lineNum : %d\n", lineNum);
char *map = mmap(NULL, sizeof(line1)*lineNum, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
// entry *entry_pool = (entry *) malloc(sizeof(entry)*lineNum);
// printf("entry_pool is at %p\n", entry_pool);
entry *entry_pool = (entry *) malloc(sizeof(entry));
/* build the entry */
entry *pHead, *e;
pHead = entry_pool;
printf("size of entry : %lu bytes\n", sizeof(entry));
e = pHead;
e->pNext = NULL;
/* build the detail */
detail *detail_pool[THREAD_NUM], *d[THREAD_NUM];
for (int i = 0; i < THREAD_NUM; i++) {
// detail_pool[i] = (detail *) malloc(sizeof(detail)*lineNum/THREAD_NUM);
detail_pool[i] = (detail *) malloc(sizeof(detail));
d[i] = detail_pool[i];
}
pHead->pdetail = detail_pool[0];
// printf("e->pdetail : %p\nd[0]=%p\nd[1]=%p\nd[2]=%p\nd[3]=%p\n", e->pdetail, d[0], d[1], d[2], d[3]);
#else
/* build the entry */
entry *pHead, *e;
pHead = (entry *) malloc(sizeof(entry));
printf("size of entry : %lu bytes\n", sizeof(entry));
e = pHead;
e->pNext = NULL;
#endif
#if defined(__GNUC__)
__builtin___clear_cache((char *) pHead, (char *) pHead + sizeof(entry));
#endif
#if defined(OPT)
pthread_setconcurrency(THREAD_NUM+1);
pthread_t tid[THREAD_NUM];
printf("get concurrency: %d\n", pthread_getconcurrency());
clock_gettime(CLOCK_REALTIME, &start);
int a;
while (fgets(line, sizeof(line), fp)) {
while (line[i] != '\0')
i++;
line[i - 1] = '\0';
i = 0;
e = append(line, e);
a++;
// printf("%d : ", a);
}
// for (int t = 0; t < THREAD_NUM; t++) {
// printf("In main: creating thread %d\n", t);
pthread_create(&tid[0], NULL, (void *)append_detail(d[0], 0, lineNum), NULL);
pthread_create(&tid[1], NULL, (void *)append_detail(d[1], 1, lineNum), NULL);
pthread_create(&tid[2], NULL, (void *)append_detail(d[2], 2, lineNum), NULL);
pthread_create(&tid[3], NULL, (void *)append_detail(d[3], 3, lineNum), NULL);
// }
/* rove the detail_pool arry */
/* rove the detail_pool arry */
clock_gettime(CLOCK_REALTIME, &end);
cpu_time1 = diff_in_second(start, end);
e = pHead;
while (e!=NULL) {
printf("The lastName structure is : %s", e->lastName);
e = e->pNext;
}
#else
clock_gettime(CLOCK_REALTIME, &start);
while (fgets(line, sizeof(line), fp)) {
while (line[i] != '\0')
i++;
line[i - 1] = '\0';
i = 0;
e = append(line, e);
}
clock_gettime(CLOCK_REALTIME, &end);
cpu_time1 = diff_in_second(start, end);
#endif
/* close file as soon as possible */
fclose(fp);
e = pHead;
/* the givn last name to find */
char input[MAX_LAST_NAME_SIZE] = "zyxel";
e = pHead;
assert(findName(input, e) &&
"Did you implement findName() in " IMPL "?");
assert(0 == strcmp(findName(input, e)->lastName, "zyxel"));
#if defined(__GNUC__)
__builtin___clear_cache((char *) pHead, (char *) pHead + sizeof(entry));
#endif
/* compute the execution time */
clock_gettime(CLOCK_REALTIME, &start);
findName(input, e);
clock_gettime(CLOCK_REALTIME, &end);
cpu_time2 = diff_in_second(start, end);
FILE *output;
#if defined(OPT)
output = fopen("opt.txt", "a");
// free(entry_pool);
/* munmap */
for (int i = 0; i < THREAD_NUM; i++)
munmap(detail_pool[i], sizeof(detail)*lineNum/THREAD_NUM);
#else
output = fopen("orig.txt", "a");
#endif
fprintf(output, "append() findName() %lf %lf\n", cpu_time1, cpu_time2);
fclose(output);
printf("execution time of append() : %lf sec\n", cpu_time1);
printf("execution time of findName() : %lf sec\n", cpu_time2);
if (pHead->pNext) free(pHead->pNext);
free(pHead);
pthread_exit(NULL);
return 0;
}