I meant for Zam to describe it in more detail, sorry about that. :-/ Hans
Alec H. Peterson wrote: > Hi Hans, > > On Feb 28, 2006, at 12:11, Hans Reiser wrote: > >> Please describe it in more detail. > > > Well, the error I'm getting is this: > > Feb 21 13:10:22 ecbuild-10 kernel: WARNING: Flushing like mad: 16384 > > The C program I'm running to do the test is this: > > main(int argc, char **argv) > { > char buf[1024]; > char dir[1024]; > int i,j,k; > int ret; > int fd; > int *sequence; > struct timeval start, unlinktime, end; > > if(argc != 2) > { > fprintf(stderr, "Usage: %s <base directory>\n", argv[0]); > exit(1); > } > > strncpy(dir, argv[1], 1024); > > if(chdir(dir)) > { > perror("chdir"); > exit(1); > } > > for(i = 0; i < 256; i++) > { > snprintf(buf, 1024, "%d", i); > ret = mkdir(buf, S_IRWXU); > if(ret && (errno != EEXIST)) > { > perror("mkdir"); > exit(1); > } > } > > > { > sequence = sequence20000; > gettimeofday(&start, NULL); > fprintf(stderr, "Starting %d run %d.%d.\n", > 256 * 20000, start.tv_sec, start.tv_usec); > > for(i = 0; i < 256; i++) > { > for(j = 0; j < 20000; j++) > { > snprintf(buf, 1024, "%d/%d", i, j); > fd = open(buf, O_CREAT | O_RDWR, S_IRUSR | S_IWUSR); > if(fd == -1) > { > perror("open"); > exit(1); > } > close(fd); > } > fprintf(stderr, "Done %d\n", i); > } > > gettimeofday(&unlinktime, NULL); > fprintf(stderr, "Starting %d unlink %d.%d, elapsed time was %d.\n", > 256 * 20000, unlinktime.tv_sec, unlinktime.tv_usec, > unlinktime.tv_sec - start.tv_sec); > > for(i = 0; i < 20000; i++) > { > for(j = 0; j < 256; j++) > { > snprintf(buf, 1024, "%d/%d", j, sequence[i]); > unlink(buf); > if(fd == -1) > { > perror("unlink"); > exit(1); > } > } > fprintf(stderr, "Done %d\n", i); > } > > gettimeofday(&end, NULL); > fprintf(stderr, "Done with %d unlink %d.%d, elapsed time was %d. \n", > 20000 * 256, end.tv_sec, end.tv_usec, > end.tv_sec - unlinktime.tv_sec); > } > > exit(0); > } > > sequence20000 is an array which contains a sequence from 1 to 20000 > randomly ordered. > > Alec > > >