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/*
* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2006 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
* University of Stuttgart. All rights reserved.
* Copyright (c) 2004-2005 The Regents of the University of California.
* All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*
* These symbols are in a file by themselves to provide nice linker
* semantics. Since linkers generally pull in symbols by object
* files, keeping these symbols as the only symbols in this file
* prevents utility programs such as "ompi_info" from having to import
* entire components just to query their version and parameters.
*/
#include "ompi_config.h"
#include "coll_tuned.h"
#include "mpi.h"
#include "ompi/mca/coll/coll.h"
#include "coll_tuned.h"
#include "opal/util/output.h"
/*
* Public string showing the coll ompi_tuned component version number
*/
const char *ompi_coll_tuned_component_version_string =
"Open MPI tuned collective MCA component version " OMPI_VERSION;
/*
* Global variable
*/
int ompi_coll_tuned_stream = -1;
int ompi_coll_tuned_priority = 30;
int ompi_coll_tuned_preallocate_memory_comm_size_limit = (32*1024);
int ompi_coll_tuned_use_dynamic_rules = 0;
char* ompi_coll_tuned_dynamic_rules_filename = (char*) NULL;
int ompi_coll_tuned_init_tree_fanout = 4;
int ompi_coll_tuned_init_chain_fanout = 4;
/* forced alogrithm variables */
/* indices for the MCA parameters */
coll_tuned_force_algorithm_mca_param_indices_t ompi_coll_tuned_forced_params[COLLCOUNT];
/* max algorithm values */
int ompi_coll_tuned_forced_max_algorithms[COLLCOUNT];
/*
* Local function
*/
static int tuned_open(void);
static int tuned_close(void);
/*
* Instantiate the public struct with all of our public information
* and pointers to our public functions in it
*/
mca_coll_tuned_component_t mca_coll_tuned_component = {
/* First, fill in the super (mca_coll_base_component_1_0_0_t) */
{
/* First, the mca_component_t struct containing meta information
about the component itself */
{
/* Indicate that we are a coll v1.0.0 component (which also implies a
specific MCA version) */
MCA_COLL_BASE_VERSION_1_0_0,
/* Component name and version */
"tuned",
OMPI_MAJOR_VERSION,
OMPI_MINOR_VERSION,
OMPI_RELEASE_VERSION,
/* Component open and close functions */
tuned_open,
tuned_close
},
/* Next the MCA v1.0.0 component meta data */
{
/* Whether the component is checkpointable or not */
true
},
/* Initialization / querying functions */
ompi_coll_tuned_init_query,
ompi_coll_tuned_comm_query,
NULL
},
/* priority of the module */
0,
/* Tuned component specific information */
/* Note some of this WAS in the module */
NULL /* ompi_coll_alg_rule_t ptr */
};
static int tuned_open(void)
{
#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);
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_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]);
}
OPAL_OUTPUT((ompi_coll_tuned_stream, "coll:tuned:component_open: done!"));
return OMPI_SUCCESS;
}
/* here we should clean up state stored on the component */
/* i.e. alg table and dynamic changable rules if allocated etc */
static int tuned_close(void)
{
OPAL_OUTPUT((ompi_coll_tuned_stream, "coll:tuned:component_close: called"));
/* dealloc alg table if allocated */
/* dealloc dynamic changable rules if allocated */
OPAL_OUTPUT((ompi_coll_tuned_stream, "coll:tuned:component_close: done!"));
return OMPI_SUCCESS;
}
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