291 строка
10 KiB
C
291 строка
10 KiB
C
/*
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* Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2006 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* reserved.
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* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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* Copyright (c) 2007 Sun Microsystems, Inc. All rights reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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#include "ompi_config.h"
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#endif /* HAVE_UNISTD_H*/
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif /* HAVE_STDLIB_H */
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#include <errno.h>
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#include "orte/util/show_help.h"
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#include "opal/mca/base/base.h"
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#include "opal/mca/base/mca_base_param.h"
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#include "orte/util/show_help.h"
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#include "orte/util/proc_info.h"
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#include "ompi/mca/allocator/base/base.h"
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#include "mpool_sm.h"
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#include "ompi/mca/common/sm/common_sm_mmap.h"
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#include "ompi/proc/proc.h"
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/*
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* Local functions
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*/
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static int mca_mpool_sm_open(void);
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static int mca_mpool_sm_close( void );
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static mca_mpool_base_module_t* mca_mpool_sm_init(
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struct mca_mpool_base_resources_t* resources);
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mca_mpool_sm_component_t mca_mpool_sm_component = {
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{
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/* First, the mca_base_component_t struct containing meta
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information about the component itself */
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{
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/* Indicate that we are a mpool v1.0.0 component (which also
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implies a specific MCA version) */
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MCA_MPOOL_BASE_VERSION_1_0_0,
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"sm", /* MCA component name */
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OMPI_MAJOR_VERSION, /* MCA component major version */
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OMPI_MINOR_VERSION, /* MCA component minor version */
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OMPI_RELEASE_VERSION, /* MCA component release version */
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mca_mpool_sm_open, /* component open */
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mca_mpool_sm_close
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},
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/* Next the MCA v1.0.0 component meta data */
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{
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/* The component is not checkpoint ready */
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MCA_BASE_METADATA_PARAM_NONE
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},
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mca_mpool_sm_init
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}
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};
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static char *max_size_param, *min_size_param, *peer_size_param;
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static long default_max, default_min, default_peer;
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/**
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* component open/close/init function
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*/
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static int mca_mpool_sm_open(void)
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{
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int value = 0;
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char *size_str = NULL;
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default_max = 512*1024*1024;
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default_min = 128*1024*1024;
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default_peer = 32*1024*1024;
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/* register SM component parameters */
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mca_base_param_reg_string(&mca_mpool_sm_component.super.mpool_version,
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"allocator",
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"Name of allocator component to use with sm mpool",
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false, false,
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"bucket",
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&mca_mpool_sm_component.sm_allocator_name);
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/* register values as string instead of int. A string-converted
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* signed long int allows the max_size or the sm_size
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* to be set up to 2GB-1 for 32 bit and much greater for 64 bit. */
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asprintf(&size_str, "%ld", default_max);
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mca_base_param_reg_string(&mca_mpool_sm_component.super.mpool_version,
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"max_size",
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"Maximum size of the sm mpool shared memory file",
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false, false, size_str, &max_size_param);
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free(size_str);
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asprintf(&size_str, "%ld", default_min);
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mca_base_param_reg_string(&mca_mpool_sm_component.super.mpool_version,
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"min_size",
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"Minimum size of the sm mpool shared memory file",
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false, false, size_str, &min_size_param);
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free(size_str);
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asprintf(&size_str, "%ld", default_peer);
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mca_base_param_reg_string(&mca_mpool_sm_component.super.mpool_version,
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"per_peer_size",
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"Size (in bytes) to allocate per local peer in "
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"the sm mpool shared memory file, bounded by "
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"min_size and max_size",
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false, false, size_str, &peer_size_param);
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free(size_str);
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mca_base_param_reg_int(&mca_mpool_sm_component.super.mpool_version,
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"verbose",
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"Enable verbose output for mpool sm component",
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false, false, 0, &value);
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if (value != 0) {
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mca_mpool_sm_component.verbose = opal_output_open(NULL);
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} else {
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mca_mpool_sm_component.verbose = -1;
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}
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mca_mpool_sm_component.sm_size = 0;
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return OMPI_SUCCESS;
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}
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static int mca_mpool_sm_close( void )
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{
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if( NULL != mca_common_sm_mmap ) {
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if( OMPI_SUCCESS == mca_common_sm_mmap_fini( mca_common_sm_mmap ) ) {
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unlink( mca_common_sm_mmap->map_path );
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}
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OBJ_RELEASE( mca_common_sm_mmap );
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}
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return OMPI_SUCCESS;
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}
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static mca_mpool_base_module_t* mca_mpool_sm_init(
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struct mca_mpool_base_resources_t* resources)
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{
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char *file_name;
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int len;
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mca_mpool_sm_module_t* mpool_module;
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mca_allocator_base_component_t* allocator_component;
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long max_size, min_size, peer_size;
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ompi_proc_t **procs;
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size_t num_all_procs, i, num_local_procs = 0;
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/* README: this needs to change if procs in different jobs (even
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spawned ones) are to talk using shared memory */
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procs = ompi_proc_world(&num_all_procs);
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for (i = 0 ; i < num_all_procs ; ++i) {
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if (procs[i]->proc_flags & OMPI_PROC_FLAG_LOCAL) {
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num_local_procs++;
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}
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}
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free(procs);
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/* parse the max, min and peer sizes, and validate them */
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/* absolutely necessary to reset errno each time */
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errno = 0;
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max_size = strtol(max_size_param, (char **)NULL, 10);
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if (errno == ERANGE) {
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opal_output(0, "mca_mpool_sm_init: max_size overflows! set to default (%ld)", default_max);
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max_size = default_max;
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} else if (errno == EINVAL) {
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opal_output(0, "mca_mpool_sm_init: invalid max_size entered. set it to (%ld)", default_max);
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max_size = default_max;
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}
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errno = 0;
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min_size = strtol(min_size_param, (char **)NULL, 10);
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if (errno == ERANGE) {
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opal_output(0, "mca_mpool_sm_init: min_size overflows! set to default (%ld)", default_min);
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min_size = default_min;
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} else if (errno == EINVAL) {
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opal_output(0, "mca_mpool_sm_init: invalid min_size entered. set it to (%ld)", default_min);
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min_size = default_min;
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}
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errno = 0;
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peer_size = strtol(peer_size_param, (char **)NULL, 10);
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if (errno == ERANGE) {
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opal_output(0, "mca_mpool_sm_init: peer_size overflows! set to default (%ld)", default_peer);
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peer_size = default_peer;
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} else if (errno == EINVAL) {
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opal_output(0, "mca_mpool_sm_init: invalid peer_size entered. set it to (%ld)", default_peer);
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peer_size = default_peer;
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}
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/* more checks... */
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if (min_size > max_size) {
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opal_output(0, "mca_mpool_sm_init: adjusting max_size to be min_size (%ld)",
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min_size);
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max_size = min_size;
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}
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/* sm_size is a product of peer_size * num_local_procs. To prevent the
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* sm_size from overflowing SIZE_MAX, we first calculate the quotient.
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* If quotient is less than the peer_size, it means the product
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* (peer_size * num_local_procs) is going to overflow SIZE_MAX, then we'll
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* set sm_size to max_size. */
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if ((double)LONG_MAX / num_local_procs < peer_size) {
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/* enable verbose would show if sm_size overflows */
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opal_output(mca_mpool_sm_component.verbose,
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"mca_mpool_sm_init: sm_size overflows, set sm_size to max_size (%ld)",
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LONG_MAX);
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mca_mpool_sm_component.sm_size = max_size;
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} else {
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mca_mpool_sm_component.sm_size = peer_size * num_local_procs;
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}
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if (min_size > mca_mpool_sm_component.sm_size) {
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mca_mpool_sm_component.sm_size = min_size;
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}
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if (max_size < mca_mpool_sm_component.sm_size) {
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mca_mpool_sm_component.sm_size = max_size;
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}
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allocator_component = mca_allocator_component_lookup(
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mca_mpool_sm_component.sm_allocator_name);
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/* if specified allocator cannot be loaded - look for an alternative */
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if(NULL == allocator_component) {
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if(opal_list_get_size(&mca_allocator_base_components) == 0) {
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mca_base_component_list_item_t* item = (mca_base_component_list_item_t*)
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opal_list_get_first(&mca_allocator_base_components);
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allocator_component = (mca_allocator_base_component_t*)item->cli_component;
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opal_output(0, "mca_mpool_sm_init: unable to locate allocator: %s - using %s\n",
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mca_mpool_sm_component.sm_allocator_name, allocator_component->allocator_version.mca_component_name);
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} else {
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opal_output(0, "mca_mpool_sm_init: unable to locate allocator: %s\n",
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mca_mpool_sm_component.sm_allocator_name);
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return NULL;
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}
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}
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mpool_module = (mca_mpool_sm_module_t*)malloc(sizeof(mca_mpool_sm_module_t));
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mca_mpool_sm_module_init(mpool_module);
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/* create initial shared memory mapping */
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len = asprintf( &file_name, "%s"OPAL_PATH_SEP"shared_mem_pool.%s",
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orte_process_info.job_session_dir,
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orte_process_info.nodename );
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if ( 0 > len ) {
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free(mpool_module);
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return NULL;
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}
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opal_output(mca_mpool_sm_component.verbose,
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"mca_mpool_sm_init: shared memory size used: (%ld)",
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mca_mpool_sm_component.sm_size);
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if(NULL ==
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(mca_common_sm_mmap =
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mca_common_sm_mmap_init(mca_mpool_sm_component.sm_size,
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file_name,sizeof(mca_common_sm_mmap_t), 8 )
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))
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{
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opal_output(0, "mca_mpool_sm_init: unable to create shared memory mapping (%s)", file_name);
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free(file_name);
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free(mpool_module);
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return NULL;
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}
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free(file_name);
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/* setup allocator */
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mpool_module->sm_allocator =
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allocator_component->allocator_init(true,
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mca_common_sm_mmap_seg_alloc, NULL, NULL);
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if(NULL == mpool_module->sm_allocator) {
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opal_output(0, "mca_mpool_sm_init: unable to initialize allocator");
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free(mpool_module);
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return NULL;
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}
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return &mpool_module->super;
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}
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