static int mca_bml_base_open(mca_base_open_flag_t flags)
{
int ret;
if(OMPI_SUCCESS !=
(ret = mca_base_framework_components_open(&ompi_bml_base_framework, flags))) {
return ret;
}
#if OPAL_ENABLE_DEBUG_RELIABILITY
/* seed random number generator */
struct timeval tv;
gettimeofday(&tv, NULL);
opal_srand(&mca_bml_base_rand_buff,(uint32_t)(getpid() * tv.tv_usec));
/* initialize count */
if(mca_bml_base_error_rate_ceiling > 0
&& mca_bml_base_error_rate_floor <= mca_bml_base_error_rate_ceiling) {
mca_bml_base_error_count = (int) (((double) mca_bml_base_error_rate_ceiling *
opal_rand(&mca_bml_base_rand_buff))/(UINT32_MAX+1.0));
}
#endif
return mca_base_framework_open(&ompi_btl_base_framework, 0);
}
/* the file name is only guaranteed to be unique on the local host. if there
* was a failure that left backing files behind, then no such guarantees can be
* made. we use the pid + file_name hash + random number to help avoid issues.
*
* caller is responsible for freeing returned resources. the returned string
* will be OPAL_PATH_MAX long.
*/
static char *
get_uniq_file_name(const char *base_path, const char *hash_key)
{
char *uniq_name_buf = NULL;
unsigned long str_hash = 0;
pid_t my_pid;
opal_rng_buff_t rand_buff;
uint32_t rand_num;
/* invalid argument */
if (NULL == hash_key) {
return NULL;
}
if (NULL == (uniq_name_buf = calloc(OPAL_PATH_MAX, sizeof(char)))) {
/* out of resources */
return NULL;
}
my_pid = getpid();
opal_srand(&rand_buff,((uint32_t)(time(NULL) + my_pid)));
rand_num = opal_rand(&rand_buff) % 1024;
str_hash = sdbm_hash((unsigned char *)hash_key);
/* build the name */
snprintf(uniq_name_buf, OPAL_PATH_MAX, "%s/open_mpi_shmem_mmap.%d_%lu_%d",
base_path, (int)my_pid, str_hash, rand_num);
return uniq_name_buf;
}
static int orcm_sensor_evinj_query(mca_base_module_t **module, int *priority)
{
if (0.0 < mca_sensor_evinj_component.prob) {
*priority = 1; /* at the bottom */
*module = (mca_base_module_t *)&orcm_sensor_evinj_module;
/* seed the random number generator */
opal_srand(&mca_sensor_evinj_component.rng_buff, (uint32_t)getpid());
return ORCM_SUCCESS;
}
*priority = 0;
*module = NULL;
return ORTE_ERROR;
}
static int orte_sensor_ft_tester_query(mca_base_module_t **module, int *priority)
{
if (0.0 < mca_sensor_ft_tester_component.fail_prob ||
0.0 < mca_sensor_ft_tester_component.daemon_fail_prob) {
*priority = 1; /* at the bottom */
*module = (mca_base_module_t *)&orte_sensor_ft_tester_module;
/* seed the RNG --- Not sure if we should assume all procs use
* the same seed?
*/
opal_srand(&orte_sensor_ft_rng_buff, (uint32_t) getpid());
return ORTE_SUCCESS;
}
*priority = 0;
*module = NULL;
return ORTE_ERROR;
}
static inline void orte_pre_condition_transports_use_rand(uint64_t* unique_key) {
opal_rng_buff_t rng;
opal_srand(&rng,(unsigned int)time(NULL));
unique_key[0] = opal_rand(&rng);
unique_key[1] = opal_rand(&rng);
}
