static int tuned_register(void)
{
/* Use a low priority, but allow other components to be lower */
ompi_coll_tuned_priority = 30;
(void) mca_base_component_var_register(&mca_coll_tuned_component.super.collm_version,
"priority", "Priority of the tuned coll component",
MCA_BASE_VAR_TYPE_INT, NULL, 0, 0,
OPAL_INFO_LVL_6,
MCA_BASE_VAR_SCOPE_READONLY,
&ompi_coll_tuned_priority);
/* parameter for pre-allocated memory requests etc */
ompi_coll_tuned_preallocate_memory_comm_size_limit = (32 * 1024);
(void) mca_base_component_var_register(&mca_coll_tuned_component.super.collm_version,
"pre_allocate_memory_comm_size_limit",
"Size of communicator were we stop pre-allocating memory for the fixed internal buffer used for message requests etc that is hung off the communicator data segment. I.e. if you have a 100'000 nodes you might not want to pre-allocate 200'000 request handle slots per communicator instance!",
MCA_BASE_VAR_TYPE_INT, NULL, 0, 0,
OPAL_INFO_LVL_6,
MCA_BASE_VAR_SCOPE_READONLY,
&ompi_coll_tuned_preallocate_memory_comm_size_limit);
/* some initial guesses at topology parameters */
ompi_coll_tuned_init_tree_fanout = 4;
(void) mca_base_component_var_register(&mca_coll_tuned_component.super.collm_version,
"init_tree_fanout",
"Inital fanout used in the tree topologies for each communicator. This is only an initial guess, if a tuned collective needs a different fanout for an operation, it build it dynamically. This parameter is only for the first guess and might save a little time",
MCA_BASE_VAR_TYPE_INT, NULL, 0, 0,
OPAL_INFO_LVL_6,
MCA_BASE_VAR_SCOPE_READONLY,
&ompi_coll_tuned_init_tree_fanout);
ompi_coll_tuned_init_chain_fanout = 4;
(void) mca_base_component_var_register(&mca_coll_tuned_component.super.collm_version,
"init_chain_fanout",
"Inital fanout used in the chain (fanout followed by pipeline) topologies for each communicator. This is only an initial guess, if a tuned collective needs a different fanout for an operation, it build it dynamically. This parameter is only for the first guess and might save a little time",
MCA_BASE_VAR_TYPE_INT, NULL, 0, 0,
OPAL_INFO_LVL_6,
MCA_BASE_VAR_SCOPE_READONLY,
&ompi_coll_tuned_init_chain_fanout);
ompi_coll_tuned_use_dynamic_rules = false;
(void) mca_base_component_var_register(&mca_coll_tuned_component.super.collm_version,
"use_dynamic_rules",
"Switch used to decide if we use static (compiled/if statements) or dynamic (built at runtime) decision function rules",
MCA_BASE_VAR_TYPE_BOOL, NULL, 0, 0,
OPAL_INFO_LVL_6,
MCA_BASE_VAR_SCOPE_READONLY,
&ompi_coll_tuned_use_dynamic_rules);
ompi_coll_tuned_dynamic_rules_filename = NULL;
(void) mca_base_component_var_register(&mca_coll_tuned_component.super.collm_version,
"dynamic_rules_filename",
"Filename of configuration file that contains the dynamic (@runtime) decision function rules",
MCA_BASE_VAR_TYPE_STRING, NULL, 0, 0,
OPAL_INFO_LVL_6,
MCA_BASE_VAR_SCOPE_READONLY,
&ompi_coll_tuned_dynamic_rules_filename);
/* register forced params */
ompi_coll_tuned_allreduce_intra_check_forced_init(&ompi_coll_tuned_forced_params[ALLREDUCE]);
ompi_coll_tuned_alltoall_intra_check_forced_init(&ompi_coll_tuned_forced_params[ALLTOALL]);
ompi_coll_tuned_allgather_intra_check_forced_init(&ompi_coll_tuned_forced_params[ALLGATHER]);
ompi_coll_tuned_allgatherv_intra_check_forced_init(&ompi_coll_tuned_forced_params[ALLGATHERV]);
ompi_coll_tuned_alltoallv_intra_check_forced_init(&ompi_coll_tuned_forced_params[ALLTOALLV]);
ompi_coll_tuned_barrier_intra_check_forced_init(&ompi_coll_tuned_forced_params[BARRIER]);
ompi_coll_tuned_bcast_intra_check_forced_init(&ompi_coll_tuned_forced_params[BCAST]);
ompi_coll_tuned_reduce_intra_check_forced_init(&ompi_coll_tuned_forced_params[REDUCE]);
ompi_coll_tuned_reduce_scatter_intra_check_forced_init(&ompi_coll_tuned_forced_params[REDUCESCATTER]);
ompi_coll_tuned_gather_intra_check_forced_init(&ompi_coll_tuned_forced_params[GATHER]);
ompi_coll_tuned_scatter_intra_check_forced_init(&ompi_coll_tuned_forced_params[SCATTER]);
return OMPI_SUCCESS;
}
static int tuned_open(void)
{
int rc;
#if OMPI_ENABLE_DEBUG
{
int param;
param = mca_base_param_find("coll", NULL, "base_verbose");
if (param >= 0) {
int verbose;
mca_base_param_lookup_int(param, &verbose);
if (verbose > 0) {
ompi_coll_tuned_stream = opal_output_open(NULL);
}
}
}
#endif /* OMPI_ENABLE_DEBUG */
/* Use a low priority, but allow other components to be lower */
mca_base_param_reg_int(&mca_coll_tuned_component.super.collm_version,
"priority",
"Priority of the tuned coll component",
false, false, ompi_coll_tuned_priority,
&ompi_coll_tuned_priority);
/* parameter for pre-allocated memory requests etc */
mca_base_param_reg_int(&mca_coll_tuned_component.super.collm_version,
"pre_allocate_memory_comm_size_limit",
"Size of communicator were we stop pre-allocating memory for the fixed internal buffer used for message requests etc that is hung off the communicator data segment. I.e. if you have a 100'000 nodes you might not want to pre-allocate 200'000 request handle slots per communicator instance!",
false, false, ompi_coll_tuned_preallocate_memory_comm_size_limit,
&ompi_coll_tuned_preallocate_memory_comm_size_limit);
/* some initial guesses at topology parameters */
mca_base_param_reg_int(&mca_coll_tuned_component.super.collm_version,
"init_tree_fanout",
"Inital fanout used in the tree topologies for each communicator. This is only an initial guess, if a tuned collective needs a different fanout for an operation, it build it dynamically. This parameter is only for the first guess and might save a little time",
false, false, ompi_coll_tuned_init_tree_fanout,
&ompi_coll_tuned_init_tree_fanout);
mca_base_param_reg_int(&mca_coll_tuned_component.super.collm_version,
"init_chain_fanout",
"Inital fanout used in the chain (fanout followed by pipeline) topologies for each communicator. This is only an initial guess, if a tuned collective needs a different fanout for an operation, it build it dynamically. This parameter is only for the first guess and might save a little time",
false, false, ompi_coll_tuned_init_chain_fanout,
&ompi_coll_tuned_init_chain_fanout);
/* now check that the user hasn't overrode any of the decision functions if dynamic rules are enabled */
/* the user can redo this before every comm dup/create if they like */
/* this is useful for benchmarking and user knows best tuning */
/* as this is the component we only lookup the indicies of the mca params */
/* the actual values are looked up during comm create via module init */
/* intra functions first */
/* if dynamic rules allowed then look up dynamic rules config filename, else we leave it an empty filename (NULL) */
/* by default DISABLE dynamic rules and instead use fixed [if based] rules */
mca_base_param_reg_int(&mca_coll_tuned_component.super.collm_version,
"use_dynamic_rules",
"Switch used to decide if we use static (compiled/if statements) or dynamic (built at runtime) decision function rules",
false, false, ompi_coll_tuned_use_dynamic_rules,
&ompi_coll_tuned_use_dynamic_rules);
if (ompi_coll_tuned_use_dynamic_rules) {
mca_base_param_reg_string(&mca_coll_tuned_component.super.collm_version,
"dynamic_rules_filename",
"Filename of configuration file that contains the dynamic (@runtime) decision function rules",
false, false, ompi_coll_tuned_dynamic_rules_filename,
&ompi_coll_tuned_dynamic_rules_filename);
if( ompi_coll_tuned_dynamic_rules_filename ) {
OPAL_OUTPUT((ompi_coll_tuned_stream,"coll:tuned:component_open Reading collective rules file [%s]",
ompi_coll_tuned_dynamic_rules_filename));
rc = ompi_coll_tuned_read_rules_config_file( ompi_coll_tuned_dynamic_rules_filename,
&(mca_coll_tuned_component.all_base_rules), COLLCOUNT);
if( rc >= 0 ) {
OPAL_OUTPUT((ompi_coll_tuned_stream,"coll:tuned:module_open Read %d valid rules\n", rc));
} else {
OPAL_OUTPUT((ompi_coll_tuned_stream,"coll:tuned:module_open Reading collective rules file failed\n"));
mca_coll_tuned_component.all_base_rules = NULL;
}
}
ompi_coll_tuned_allreduce_intra_check_forced_init(&ompi_coll_tuned_forced_params[ALLREDUCE]);
ompi_coll_tuned_alltoall_intra_check_forced_init(&ompi_coll_tuned_forced_params[ALLTOALL]);
ompi_coll_tuned_allgather_intra_check_forced_init(&ompi_coll_tuned_forced_params[ALLGATHER]);
ompi_coll_tuned_allgatherv_intra_check_forced_init(&ompi_coll_tuned_forced_params[ALLGATHERV]);
ompi_coll_tuned_alltoallv_intra_check_forced_init(&ompi_coll_tuned_forced_params[ALLTOALLV]);
ompi_coll_tuned_barrier_intra_check_forced_init(&ompi_coll_tuned_forced_params[BARRIER]);
ompi_coll_tuned_bcast_intra_check_forced_init(&ompi_coll_tuned_forced_params[BCAST]);
ompi_coll_tuned_reduce_intra_check_forced_init(&ompi_coll_tuned_forced_params[REDUCE]);
ompi_coll_tuned_reduce_scatter_intra_check_forced_init(&ompi_coll_tuned_forced_params[REDUCESCATTER]);
ompi_coll_tuned_gather_intra_check_forced_init(&ompi_coll_tuned_forced_params[GATHER]);
ompi_coll_tuned_scatter_intra_check_forced_init(&ompi_coll_tuned_forced_params[SCATTER]);
}
OPAL_OUTPUT((ompi_coll_tuned_stream, "coll:tuned:component_open: done!"));
return OMPI_SUCCESS;
}
