121 строка
3.6 KiB
C
121 строка
3.6 KiB
C
/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
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/*
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* Copyright (c) 2014 Intel, Inc. All rights reserved.
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* Copyright (c) 2015 Los Alamos National Security, LLC. All rights
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* 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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* These symbols are in a file by themselves to provide nice linker
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* semantics. Since linkers generally pull in symbols by object
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* files, keeping these symbols as the only symbols in this file
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* prevents utility programs such as "ompi_info" from having to import
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* entire components just to query their version and parameters.
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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/mca/pmix/pmix.h"
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#include "pmix_cray.h"
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#include <sys/syscall.h>
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#include <pmi.h>
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/*
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* Public string showing the pmix cray component version number
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*/
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const char *opal_pmix_cray_component_version_string =
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"OPAL cray pmix MCA component version " OPAL_VERSION;
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/*
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* Local function
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*/
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static int pmix_cray_component_open(void);
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static int pmix_cray_component_query(mca_base_module_t **module, int *priority);
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static int pmix_cray_component_close(void);
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/*
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* Instantiate the public struct with all of our public information
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* and pointers to our public functions in it
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*/
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opal_pmix_cray_component_t mca_pmix_cray_component = {
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{
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/* First, the mca_component_t struct containing meta information
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about the component itself */
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.base_version = {
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/* Indicate that we are a pmix v1.1.0 component (which also
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implies a specific MCA version) */
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OPAL_PMIX_BASE_VERSION_2_0_0,
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/* Component name and version */
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.mca_component_name = "cray",
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MCA_BASE_MAKE_VERSION(component, OPAL_MAJOR_VERSION, OPAL_MINOR_VERSION,
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OPAL_RELEASE_VERSION),
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/* Component open and close functions */
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.mca_open_component = pmix_cray_component_open,
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.mca_close_component = pmix_cray_component_close,
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.mca_query_component = pmix_cray_component_query,
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},
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/* Next the MCA v1.0.0 component meta data */
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.base_data = {
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/* The component is checkpoint ready */
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MCA_BASE_METADATA_PARAM_CHECKPOINT
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}
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},
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.cache_local = NULL,
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.cache_global = NULL,
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};
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static int pmix_cray_component_open(void)
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{
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return OPAL_SUCCESS;
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}
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static int pmix_cray_component_query(mca_base_module_t **module, int *priority)
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{
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int rc;
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const char proc_job_file[]="/proc/job";
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FILE *fd = NULL, *fd_task_is_app = NULL;
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char task_is_app_fname[PATH_MAX];
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/* disqualify ourselves if not running in a Cray PAGG container */
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fd = fopen(proc_job_file, "r");
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if (fd == NULL) {
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*priority = 0;
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*module = NULL;
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rc = OPAL_ERROR;
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} else {
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snprintf(task_is_app_fname,sizeof(task_is_app_fname),
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"/proc/self/task/%ld/task_is_app",syscall(SYS_gettid));
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fd_task_is_app = fopen(task_is_app_fname, "r");
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if (fd_task_is_app != NULL) { /* okay we're in a PAGG container,
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and we are an app task (not just a process
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running on a mom node, for example),
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so we should give cray pmi a shot. */
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*priority = 90;
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*module = (mca_base_module_t *)&opal_pmix_cray_module;
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fclose(fd_task_is_app);
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rc = OPAL_SUCCESS;
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}
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fclose(fd);
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}
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return rc;
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}
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static int pmix_cray_component_close(void)
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{
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return OPAL_SUCCESS;
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}
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