long do_units(unsigned long bytes)
{
struct drand48_data rand_data;
if (opt_detach)
detach();
if (opt_randomise)
os_random_seed(time(0) ^ getpid(), &rand_data);
if (!unit)
unit = bytes;
/*
* Allow a bytes=0 pass for pure fork bomb:
* usemem -n 10000 0 --detach --sleep 10
*/
do {
unsigned long size = min(bytes, unit);
do_unit(size, &rand_data);
bytes -= size;
if (runtime_exceeded())
break;
} while (bytes);
if (opt_detach && up(sem_id))
perror("up");
if (sleep_secs)
sleep(sleep_secs);
return 0;
}
static void td_fill_rand_seeds_os(struct thread_data *td)
{
os_random_seed(td->rand_seeds[FIO_RAND_BS_OFF], &td->bsrange_state);
os_random_seed(td->rand_seeds[FIO_RAND_VER_OFF], &td->verify_state);
os_random_seed(td->rand_seeds[FIO_RAND_MIX_OFF], &td->rwmix_state);
if (td->o.file_service_type == FIO_FSERVICE_RANDOM)
os_random_seed(td->rand_seeds[FIO_RAND_FILE_OFF], &td->next_file_state);
os_random_seed(td->rand_seeds[FIO_RAND_FILE_SIZE_OFF], &td->file_size_state);
os_random_seed(td->rand_seeds[FIO_RAND_TRIM_OFF], &td->trim_state);
if (!td_random(td))
return;
if (td->o.rand_repeatable)
td->rand_seeds[FIO_RAND_BLOCK_OFF] = FIO_RANDSEED * td->thread_number;
os_random_seed(td->rand_seeds[FIO_RAND_BLOCK_OFF], &td->random_state);
os_random_seed(td->rand_seeds[FIO_RAND_SEQ_RAND_READ_OFF], &td->seq_rand_state[DDIR_READ]);
os_random_seed(td->rand_seeds[FIO_RAND_SEQ_RAND_WRITE_OFF], &td->seq_rand_state[DDIR_WRITE]);
os_random_seed(td->rand_seeds[FIO_RAND_SEQ_RAND_TRIM_OFF], &td->seq_rand_state[DDIR_TRIM]);
}
static void td_fill_rand_seeds_os(struct thread_data *td)
{
os_random_seed(td->rand_seeds[0], &td->bsrange_state);
os_random_seed(td->rand_seeds[1], &td->verify_state);
os_random_seed(td->rand_seeds[2], &td->rwmix_state);
if (td->o.file_service_type == FIO_FSERVICE_RANDOM)
os_random_seed(td->rand_seeds[3], &td->next_file_state);
os_random_seed(td->rand_seeds[5], &td->file_size_state);
os_random_seed(td->rand_seeds[6], &td->trim_state);
if (!td_random(td))
return;
if (td->o.rand_repeatable)
td->rand_seeds[4] = FIO_RANDSEED * td->thread_number;
os_random_seed(td->rand_seeds[4], &td->random_state);
}