lustre/tests/createmany.c

   1 #include <stdio.h>
   2 #include <sys/types.h>
   3 #include <sys/stat.h>
   4 #include <time.h>
   5 #include <errno.h>
   6 #include <string.h>
   7 #include <fcntl.h>
   8 #include <unistd.h>
   9 #include <stdlib.h>
  10
  11 int main(int argc, char ** argv)
  12 {
  13         int i, rc = 0, do_open;
  14         char filename[4096];
  15         long int start, last, end, count;
  16
  17         if (argc != 4) {
  18                 printf("Usage %s <-o|-m> filenamebase <count|-time>\n",
  19                        argv[0]);
  20                 return 1;
  21         }
  22
  23         if (strcmp(argv[1], "-o") == 0) {
  24                 do_open = 1;
  25         } else if (strcmp(argv[1], "-m") == 0) {
  26                 do_open = 0;
  27         } else {
  28                 printf("Usage %s {-o|-m} filenamebase <count|-time>\n",
  29                        argv[0]);
  30                 return 1;
  31         }
  32
  33         if (strlen(argv[2]) > 4080) {
  34                 printf("name too long\n");
  35                 return 1;
  36         }
  37
  38         start = last = time(0);
  39
  40         end = strtol(argv[3], NULL, 0);
  41
  42         if (end > 0) {
  43                 count = end;
  44                 end = -1UL >> 1;
  45         } else {
  46                 end = start - end;
  47                 count = -1UL >> 1;
  48         }
  49
  50         for (i = 0; i < count && time(0) < end; i++) {
  51                 sprintf(filename, "%s%d", argv[2], i);
  52                 if (do_open) {
  53                         int fd = open(filename, O_CREAT|O_RDWR, 0644);
  54                         if (fd < 0) {
  55                                 printf("open(%s) error: %s\n", filename,
  56                                        strerror(errno));
  57                                 rc = errno;
  58                                 break;
  59                         }
  60                         close(fd);
  61                 } else {
  62                         rc = mknod(filename, S_IFREG| 0444, 0);
  63                         if (rc) {
  64                                 printf("mknod(%s) error: %s\n",
  65                                        filename, strerror(errno));
  66                                 rc = errno;
  67                                 break;
  68                         }
  69                 }
  70                 if ((i % 10000) == 0) {
  71                         printf(" - created %d (time %ld ; total %ld ; last %ld)\n",
  72                                i, time(0), time(0) - start, time(0) - last);
  73                         last = time(0);
  74                 }
  75         }
  76         printf("total: %d creates in %ld seconds: %f creates/second\n", i,
  77                time(0) - start, ((float)i / (time(0) - start)));
  78
  79         return rc;
  80 }