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openmpi/orte/mca/rmaps/load_balance/rmaps_lb.h

46 строки
1.2 KiB
C
Исходник Обычный вид История

Modify the OMPI paffinity and mapping system to support socket-level mapping and binding. Mostly refactors existing code, with modifications to the odls_default module to support the new capabilities. Adds several new mpirun options: * -bysocket - assign ranks on a node by socket. Effectively load balances the procs assigned to a node across the available sockets. Note that ranks can still be bound to a specific core within the socket, or to the entire socket - the mapping is independent of the binding. * -bind-to-socket - bind each rank to all the cores on the socket to which they are assigned. * -bind-to-core - currently the default behavior (maintained from prior default) * -npersocket N - launch N procs for every socket on a node. Note that this implies we know how many sockets are on a node. Mpirun will determine its local values. These can be overridden by provided values, either via MCA param or in a hostfile Similar features/options are provided at the board level for multi-board nodes. Documentation to follow... This commit was SVN r21791.
2009-08-11 02:51:27 +00:00
/*
* 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
*
* $HEADER$
*/
/**
* @file
*
* Resource Mapping
*/
#ifndef ORTE_RMAPS_LB_H
#define ORTE_RMAPS_LB_H
#include "orte_config.h"
#include "orte/mca/rmaps/rmaps.h"
BEGIN_C_DECLS
George raised some valid concerns about the extensibility of the revised rmaps framework. Address those by: 1. removing the enum of mapper values 2. change the req_mapper and last_mapper fields to char* so they can hold the component name instead of a mapper flag 3. revise the selection logic in the mapper components to reflect the change. Components now look for their name in the req_mapper field, or to see if other criteria (e.g., npernode) are set that mandate their doing the mapping Several MCA params resided in the rmaps base for historical reasons - they have been in the base since at least the original 1.2 release (and perhaps earlier). However, George correctly pointed out that they really should reside in their respective components. Accordingly, move them to the components, but register synonyms to the old names to avoid breaking backward compatibility. These revisions retain the current functionality of allowing comm_spawn'd jobs to use different mappers than the original job, and for the errmgr to utilize the resilient mapper to recover processes regardless of how they were originally mapped. Given the large number of possible combinations, I am sure that someone will find a corner-case combination of values and selection criteria that cause either no mapper to be selected, or one other than the intended to be used. No one can test all the ways people will use this system, so I expect debugging to continue for awhile. The ability of comm_spawn'd jobs to exploit this functionality relies on changes to the orte_dpm component - this will be committed separately. This commit was SVN r24520.
2011-03-12 05:30:09 +00:00
struct orte_rmaps_lb_component_t {
orte_rmaps_base_component_t super;
int npernode;
int nperboard;
int npersocket;
};
typedef struct orte_rmaps_lb_component_t orte_rmaps_lb_component_t;
ORTE_MODULE_DECLSPEC extern orte_rmaps_lb_component_t mca_rmaps_load_balance_component;
Modify the OMPI paffinity and mapping system to support socket-level mapping and binding. Mostly refactors existing code, with modifications to the odls_default module to support the new capabilities. Adds several new mpirun options: * -bysocket - assign ranks on a node by socket. Effectively load balances the procs assigned to a node across the available sockets. Note that ranks can still be bound to a specific core within the socket, or to the entire socket - the mapping is independent of the binding. * -bind-to-socket - bind each rank to all the cores on the socket to which they are assigned. * -bind-to-core - currently the default behavior (maintained from prior default) * -npersocket N - launch N procs for every socket on a node. Note that this implies we know how many sockets are on a node. Mpirun will determine its local values. These can be overridden by provided values, either via MCA param or in a hostfile Similar features/options are provided at the board level for multi-board nodes. Documentation to follow... This commit was SVN r21791.
2009-08-11 02:51:27 +00:00
extern orte_rmaps_base_module_t orte_rmaps_load_balance_module;
END_C_DECLS
#endif
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