6310361532
https://svn.open-mpi.org/trac/ompi/wiki/ProcessPlacement The wiki page is incomplete at the moment, but I hope to complete it over the next few days. I will provide updates on the devel list. As the wiki page states, the default and most commonly used options remain unchanged (except as noted below). New, esoteric and complex options have been added, but unless you are a true masochist, you are unlikely to use many of them beyond perhaps an initial curiosity-motivated experimentation. In a nutshell, this commit revamps the map/rank/bind procedure to take into account topology info on the compute nodes. I have, for the most part, preserved the default behaviors, with three notable exceptions: 1. I have at long last bowed my head in submission to the system admin's of managed clusters. For years, they have complained about our default of allowing users to oversubscribe nodes - i.e., to run more processes on a node than allocated slots. Accordingly, I have modified the default behavior: if you are running off of hostfile/dash-host allocated nodes, then the default is to allow oversubscription. If you are running off of RM-allocated nodes, then the default is to NOT allow oversubscription. Flags to override these behaviors are provided, so this only affects the default behavior. 2. both cpus/rank and stride have been removed. The latter was demanded by those who didn't understand the purpose behind it - and I agreed as the users who requested it are no longer using it. The former was removed temporarily pending implementation. 3. vm launch is now the sole method for starting OMPI. It was just too darned hard to maintain multiple launch procedures - maybe someday, provided someone can demonstrate a reason to do so. As Jeff stated, it is impossible to fully test a change of this size. I have tested it on Linux and Mac, covering all the default and simple options, singletons, and comm_spawn. That said, I'm sure others will find problems, so I'll be watching MTT results until this stabilizes. This commit was SVN r25476.
343 строки
15 KiB
C
343 строки
15 KiB
C
/*
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* Copyright (c) 2011 Cisco Systems, 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 "opal_config.h"
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#include "opal/constants.h"
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#include "opal/dss/dss.h"
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#include "opal/util/argv.h"
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#include "opal/util/output.h"
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#include "opal/util/show_help.h"
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#include "opal/mca/mca.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 "opal/mca/hwloc/hwloc.h"
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#include "opal/mca/hwloc/base/base.h"
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/*
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* The following file was created by configure. It contains extern
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* statements and the definition of an array of pointers to each
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* component's public mca_base_component_t struct.
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*/
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#include "opal/mca/hwloc/base/static-components.h"
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/*
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* Globals
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*/
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int opal_hwloc_base_output = -1;
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opal_list_t opal_hwloc_base_components;
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bool opal_hwloc_base_inited = false;
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#if OPAL_HAVE_HWLOC
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hwloc_topology_t opal_hwloc_topology=NULL;
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hwloc_cpuset_t opal_hwloc_my_cpuset=NULL;
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hwloc_cpuset_t opal_hwloc_base_given_cpus=NULL;
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opal_hwloc_base_map_t opal_hwloc_base_map = OPAL_HWLOC_BASE_MAP_NONE;
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opal_hwloc_base_mbfa_t opal_hwloc_base_mbfa = OPAL_HWLOC_BASE_MBFA_WARN;
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opal_binding_policy_t opal_hwloc_binding_policy=0;
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char *opal_hwloc_base_slot_list=NULL;
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char *opal_hwloc_base_cpu_set=NULL;
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bool opal_hwloc_report_bindings=false;
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hwloc_obj_type_t opal_hwloc_levels[] = {
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HWLOC_OBJ_MACHINE,
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HWLOC_OBJ_NODE,
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HWLOC_OBJ_SOCKET,
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HWLOC_OBJ_CACHE,
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HWLOC_OBJ_CACHE,
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HWLOC_OBJ_CACHE,
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HWLOC_OBJ_CORE,
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HWLOC_OBJ_PU
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};
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bool opal_hwloc_use_hwthreads_as_cpus = false;
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#endif
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int opal_hwloc_base_open(void)
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{
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if (opal_hwloc_base_inited) {
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return OPAL_SUCCESS;
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}
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opal_hwloc_base_inited = true;
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#if OPAL_HAVE_HWLOC
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{
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int value, i;
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opal_data_type_t tmp;
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char *str_value;
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char **tmpvals, **quals;
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/* Debugging / verbose output */
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mca_base_param_reg_int_name("hwloc", "base_verbose",
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"Verbosity level of the hwloc framework",
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false, false,
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0, &value);
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if (0 != value) {
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opal_hwloc_base_output = opal_output_open(NULL);
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} else {
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opal_hwloc_base_output = -1;
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}
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/* hwloc_base_mbind_policy */
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switch (opal_hwloc_base_map) {
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case OPAL_HWLOC_BASE_MAP_NONE:
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str_value = "none";
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break;
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case OPAL_HWLOC_BASE_MAP_LOCAL_ONLY:
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str_value = "local_only";
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break;
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}
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mca_base_param_reg_string_name("hwloc", "base_mem_alloc_policy",
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"Policy that determines how general memory allocations are bound after MPI_INIT. A value of \"none\" means that no memory policy is applied. A value of \"local_only\" means that all memory allocations will be restricted to the local NUMA node where each process is placed. Note that operating system paging policies are unaffected by this setting. For example, if \"local_only\" is used and local NUMA node memory is exhausted, a new memory allocation may cause paging.",
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false, false, str_value, &str_value);
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if (strcasecmp(str_value, "none") == 0) {
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opal_hwloc_base_map = OPAL_HWLOC_BASE_MAP_NONE;
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} else if (strcasecmp(str_value, "local_only") == 0 ||
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strcasecmp(str_value, "local-only") == 0) {
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opal_hwloc_base_map = OPAL_HWLOC_BASE_MAP_LOCAL_ONLY;
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} else {
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char hostname[32];
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gethostname(hostname, sizeof(hostname));
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opal_show_help("help-opal-hwloc-base.txt", "invalid policy",
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true, hostname, getpid(), str_value);
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free(str_value);
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return OPAL_ERR_BAD_PARAM;
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}
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free(str_value);
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/* hwloc_base_bind_failure_action */
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switch (opal_hwloc_base_mbfa) {
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case OPAL_HWLOC_BASE_MBFA_SILENT:
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str_value = "silent";
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break;
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case OPAL_HWLOC_BASE_MBFA_WARN:
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str_value = "warn";
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break;
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case OPAL_HWLOC_BASE_MBFA_ERROR:
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str_value = "error";
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break;
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}
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mca_base_param_reg_string_name("hwloc", "base_mem_bind_failure_action",
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"What Open MPI will do if it explicitly tries to bind memory to a specific NUMA location, and fails. Note that this is a different case than the general allocation policy described by hwloc_base_alloc_policy. A value of \"silent\" means that Open MPI will proceed without comment. A value of \"warn\" means that Open MPI will warn the first time this happens, but allow the job to continue (possibly with degraded performance). A value of \"error\" means that Open MPI will abort the job if this happens.",
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false, false, str_value, &str_value);
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if (strcasecmp(str_value, "silent") == 0) {
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opal_hwloc_base_mbfa = OPAL_HWLOC_BASE_MBFA_SILENT;
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} else if (strcasecmp(str_value, "warn") == 0) {
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opal_hwloc_base_mbfa = OPAL_HWLOC_BASE_MBFA_WARN;
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} else if (strcasecmp(str_value, "error") == 0) {
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opal_hwloc_base_mbfa = OPAL_HWLOC_BASE_MBFA_ERROR;
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} else {
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char hostname[32];
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gethostname(hostname, sizeof(hostname));
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opal_show_help("help-opal-hwloc-base.txt", "invalid error action",
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true, hostname, getpid(), str_value);
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free(str_value);
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return OPAL_ERR_BAD_PARAM;
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}
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free(str_value);
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/* binding specification */
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mca_base_param_reg_string_name("hwloc", "base_binding_policy",
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"Policy for binding processes [none (default) | hwthread | core | l1cache | l2cache | l3cache | socket | numa | board] (supported qualifiers: overload-allowed,if-supported)",
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false, false, NULL, &str_value);
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if (NULL == str_value) {
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opal_hwloc_binding_policy = OPAL_BIND_TO_NONE;
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/* mark that no binding policy was specified */
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opal_hwloc_binding_policy &= ~OPAL_BIND_GIVEN;
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} else if (0 == strncasecmp(str_value, "none", strlen("none"))) {
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opal_hwloc_binding_policy = OPAL_BIND_TO_NONE;
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opal_hwloc_binding_policy |= OPAL_BIND_GIVEN;
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} else {
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opal_hwloc_binding_policy |= OPAL_BIND_GIVEN;
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tmpvals = opal_argv_split(str_value, ':');
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if (1 < opal_argv_count(tmpvals)) {
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quals = opal_argv_split(tmpvals[1], ',');
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for (i=0; NULL != quals[i]; i++) {
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if (0 == strcasecmp(quals[i], "if-supported")) {
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opal_hwloc_binding_policy |= OPAL_BIND_IF_SUPPORTED;
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} else if (0 == strcasecmp(quals[i], "overload-allowed")) {
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opal_hwloc_binding_policy |= OPAL_BIND_ALLOW_OVERLOAD;
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} else {
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/* unknown option */
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opal_output(0, "Unknown qualifier to orte_process_binding: %s", str_value);
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return OPAL_ERR_BAD_PARAM;
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}
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}
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opal_argv_free(quals);
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}
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if (0 == strcasecmp(tmpvals[0], "hwthread")) {
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OPAL_SET_BINDING_POLICY(opal_hwloc_binding_policy, OPAL_BIND_TO_HWTHREAD);
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} else if (0 == strcasecmp(tmpvals[0], "core")) {
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OPAL_SET_BINDING_POLICY(opal_hwloc_binding_policy, OPAL_BIND_TO_CORE);
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} else if (0 == strcasecmp(tmpvals[0], "l1cache")) {
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OPAL_SET_BINDING_POLICY(opal_hwloc_binding_policy, OPAL_BIND_TO_L1CACHE);
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} else if (0 == strcasecmp(tmpvals[0], "l2cache")) {
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OPAL_SET_BINDING_POLICY(opal_hwloc_binding_policy, OPAL_BIND_TO_L2CACHE);
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} else if (0 == strcasecmp(tmpvals[0], "l3cache")) {
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OPAL_SET_BINDING_POLICY(opal_hwloc_binding_policy, OPAL_BIND_TO_L3CACHE);
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} else if (0 == strcasecmp(tmpvals[0], "socket")) {
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OPAL_SET_BINDING_POLICY(opal_hwloc_binding_policy, OPAL_BIND_TO_SOCKET);
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} else if (0 == strcasecmp(tmpvals[0], "numa")) {
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OPAL_SET_BINDING_POLICY(opal_hwloc_binding_policy, OPAL_BIND_TO_NUMA);
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} else if (0 == strcasecmp(tmpvals[0], "board")) {
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OPAL_SET_BINDING_POLICY(opal_hwloc_binding_policy, OPAL_BIND_TO_BOARD);
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} else {
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opal_show_help("help-opal-hwloc-base.txt", "unrecognized-policy", true, "binding", str_value);
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opal_argv_free(tmpvals);
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free(str_value);
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return OPAL_ERR_BAD_PARAM;
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}
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opal_argv_free(tmpvals);
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}
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free(str_value);
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/* backward compatibility */
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mca_base_param_reg_int_name("hwloc", "base_bind_to_core",
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"Bind processes to cores",
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false, false, (int)false, &value);
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if (value) {
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/* set binding policy to core - error if something else already set */
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if (OPAL_BINDING_POLICY_IS_SET(opal_hwloc_binding_policy) &&
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OPAL_GET_BINDING_POLICY(opal_hwloc_binding_policy) != OPAL_BIND_TO_CORE) {
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/* error - cannot redefine the default ranking policy */
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opal_show_help("help-opal-hwloc-base.txt", "redefining-policy", true,
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"core", opal_hwloc_base_print_binding(opal_hwloc_binding_policy));
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return OPAL_ERR_SILENT;
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}
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OPAL_SET_BINDING_POLICY(opal_hwloc_binding_policy, OPAL_BIND_TO_CORE);
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opal_hwloc_binding_policy |= OPAL_BIND_GIVEN;
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}
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mca_base_param_reg_int_name("hwloc", "base_bind_to_socket",
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"Bind processes to sockets",
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false, false, (int)false, &value);
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if (value) {
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/* set binding policy to socket - error if something else already set */
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if (OPAL_BINDING_POLICY_IS_SET(opal_hwloc_binding_policy) &&
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OPAL_GET_BINDING_POLICY(opal_hwloc_binding_policy) != OPAL_BIND_TO_SOCKET) {
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/* error - cannot redefine the default ranking policy */
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opal_show_help("help-opal-hwloc-base.txt", "redefining-policy", true,
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"socket", opal_hwloc_base_print_binding(opal_hwloc_binding_policy));
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return OPAL_ERR_SILENT;
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}
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OPAL_SET_BINDING_POLICY(opal_hwloc_binding_policy, OPAL_BIND_TO_SOCKET);
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opal_hwloc_binding_policy |= OPAL_BIND_GIVEN;
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}
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mca_base_param_reg_int_name("hwloc", "base_report_bindings",
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"Report bindings to stderr",
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false, false, (int)false, &value);
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opal_hwloc_report_bindings = OPAL_INT_TO_BOOL(value);
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/* did the user provide a slot list? */
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tmp = mca_base_param_reg_string_name("hwloc", "base_slot_list",
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"List of processor IDs to bind processes to [default=NULL]",
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false, false, NULL, &opal_hwloc_base_slot_list);
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if (NULL != opal_hwloc_base_slot_list) {
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/* if we already were given a policy, then this is an error */
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if (OPAL_BINDING_POLICY_IS_SET(opal_hwloc_binding_policy)) {
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opal_show_help("help-opal-hwloc-base.txt", "redefining-policy", true,
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"socket", opal_hwloc_base_print_binding(opal_hwloc_binding_policy));
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return OPAL_ERR_SILENT;
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}
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OPAL_SET_BINDING_POLICY(opal_hwloc_binding_policy, OPAL_BIND_TO_CPUSET);
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opal_hwloc_binding_policy |= OPAL_BIND_GIVEN;
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}
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/* cpu allocation specification */
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mca_base_param_reg_string_name("hwloc", "base_cpu_set",
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"Comma-separated list of ranges specifying logical cpus allocated to this job [default: none]",
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false, false, NULL, &opal_hwloc_base_cpu_set);
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/* to support tools such as ompi_info, add the components
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* to a list
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*/
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OBJ_CONSTRUCT(&opal_hwloc_base_components, opal_list_t);
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if (OPAL_SUCCESS !=
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mca_base_components_open("hwloc", opal_hwloc_base_output,
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mca_hwloc_base_static_components,
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&opal_hwloc_base_components, true)) {
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return OPAL_ERROR;
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}
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/* declare hwthreads as independent cpus */
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mca_base_param_reg_int_name("hwloc", "base_use_hwthreads_as_cpus",
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"Use hardware threads as independent cpus",
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false, false, (int)false, &value);
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opal_hwloc_use_hwthreads_as_cpus = OPAL_INT_TO_BOOL(value);
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/* declare the hwloc data types */
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tmp = OPAL_HWLOC_TOPO;
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if (OPAL_SUCCESS != (value = opal_dss.register_type(opal_hwloc_pack,
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opal_hwloc_unpack,
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(opal_dss_copy_fn_t)opal_hwloc_copy,
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(opal_dss_compare_fn_t)opal_hwloc_compare,
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(opal_dss_size_fn_t)opal_hwloc_size,
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(opal_dss_print_fn_t)opal_hwloc_print,
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(opal_dss_release_fn_t)opal_hwloc_release,
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OPAL_DSS_STRUCTURED,
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"OPAL_HWLOC_TOPO", &tmp))) {
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return value;
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}
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}
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#endif
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return OPAL_SUCCESS;
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}
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#if OPAL_HAVE_HWLOC
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static void obj_data_const(opal_hwloc_obj_data_t *ptr)
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{
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ptr->available = NULL;
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ptr->npus = 0;
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ptr->idx = UINT_MAX;
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}
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static void obj_data_dest(opal_hwloc_obj_data_t *ptr)
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{
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if (NULL != ptr->available) {
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hwloc_bitmap_free(ptr->available);
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}
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}
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OBJ_CLASS_INSTANCE(opal_hwloc_obj_data_t,
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opal_object_t,
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obj_data_const, obj_data_dest);
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static void sum_const(opal_hwloc_summary_t *ptr)
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{
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ptr->num_objs = 0;
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ptr->rtype = 0;
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}
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OBJ_CLASS_INSTANCE(opal_hwloc_summary_t,
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opal_list_item_t,
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sum_const, NULL);
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static void topo_data_const(opal_hwloc_topo_data_t *ptr)
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{
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ptr->available = NULL;
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OBJ_CONSTRUCT(&ptr->summaries, opal_list_t);
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}
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static void topo_data_dest(opal_hwloc_topo_data_t *ptr)
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{
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opal_list_item_t *item;
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if (NULL != ptr->available) {
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hwloc_bitmap_free(ptr->available);
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}
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while (NULL != (item = opal_list_remove_first(&ptr->summaries))) {
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OBJ_RELEASE(item);
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}
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OBJ_DESTRUCT(&ptr->summaries);
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}
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OBJ_CLASS_INSTANCE(opal_hwloc_topo_data_t,
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opal_object_t,
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topo_data_const,
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topo_data_dest);
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#endif
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