368 строки
14 KiB
C
368 строки
14 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) 2004-2005 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) 2008 UT-Battelle, LLC. All rights reserved.
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* Copyright (c) 2011 Los Alamos National Security, LLC.
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* 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 "orte_config.h"
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#include "orte/constants.h"
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#include <unistd.h>
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#include <string.h>
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#include <ctype.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <alps/apInfo.h>
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#include "opal/mca/installdirs/installdirs.h"
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#include "opal/util/output.h"
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#include "orte/util/show_help.h"
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#include "orte/mca/errmgr/errmgr.h"
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#include "ras_alps.h"
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#include "orte/mca/ras/base/ras_private.h"
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/*
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* Local functions
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*/
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static int orte_ras_alps_allocate(opal_list_t *nodes);
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static int orte_ras_alps_finalize(void);
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static char *ras_alps_getline(FILE *fp);
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static int orte_ras_alps_read_appinfo_file(opal_list_t *nodes, char *filename, unsigned int *uMe);
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/*
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* Global variable
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*/
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orte_ras_base_module_t orte_ras_alps_module = {
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orte_ras_alps_allocate,
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orte_ras_alps_finalize
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};
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/**
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* Discover available (pre-allocated) nodes. Allocate the
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* requested number of nodes/process slots to the job.
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*
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*/
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static int orte_ras_alps_allocate(opal_list_t *nodes)
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{
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const char alps_sysconfig[] = "/etc/sysconfig/alps"; /** Get ALPS scheduler information
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file pathname from system configuration. **/
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int ret;
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FILE *fp;
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char *str;
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char *alps_config_str;
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if (0 == orte_ras_alps_res_id) {
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orte_show_help("help-ras-alps.txt", "alps-env-var-not-found", 1);
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return ORTE_ERR_NOT_FOUND;
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}
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opal_output_verbose(1, orte_ras_base.ras_output,
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"ras:alps:allocate: Using ALPS configuration file: \"%s\"",
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alps_sysconfig);
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fp = fopen(alps_sysconfig, "r");
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if (NULL == fp) {
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ORTE_ERROR_LOG(ORTE_ERR_FILE_OPEN_FAILURE);
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return ORTE_ERR_FILE_OPEN_FAILURE;
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}
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while( (alps_config_str=ras_alps_getline(fp)) ) {
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char *cpq;
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char *cpr;
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cpq=strchr( alps_config_str, '#' ); /* Parse comments, actually ANY # */
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cpr=strchr( alps_config_str, '=' ); /* Parse for variables */
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if( !cpr || /* Skip if not definition */
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(cpq && cpq<cpr) ) { /* Skip if commented */
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free(alps_config_str);
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continue;
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}
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for( cpr--; /* Kill trailing whitespace */
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(*cpr==' ' || *cpr=='\t'); cpr-- ) ;
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for( cpq=alps_config_str; /* Kill leading whitespace */
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(*cpq==' ' || *cpq=='\t'); cpq++ ) ;
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/* Filter to needed variable. */
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if(strncmp( cpq, "ALPS_SHARED_DIR_PATH", 20 )) {
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free(alps_config_str);
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continue;
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}
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if( !(cpq=strchr( cpr, '"' )) ) { /* Can't find pathname start */
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ORTE_ERROR_LOG(ORTE_ERR_FILE_OPEN_FAILURE);
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return ORTE_ERR_FILE_OPEN_FAILURE;
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}
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if( !(cpr=strchr( ++cpq, '"' )) ) { /* Can't find pathname end */
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ORTE_ERROR_LOG(ORTE_ERR_FILE_OPEN_FAILURE);
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return ORTE_ERR_FILE_OPEN_FAILURE;
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}
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*cpr='\0';
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if( strlen(cpq)+8 > PATH_MAX ) { /* Bad configuration */
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errno=ENAMETOOLONG;
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ORTE_ERROR_LOG(ORTE_ERR_FILE_OPEN_FAILURE);
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return ORTE_ERR_FILE_OPEN_FAILURE;
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}
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asprintf(&str, "%s/appinfo", cpq);
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if (NULL == str) {
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return ORTE_ERR_OUT_OF_RESOURCE;
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}
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free(alps_config_str);
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break;
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}
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fclose(fp);
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opal_output_verbose(1, orte_ras_base.ras_output,
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"ras:alps:allocate: Located ALPS scheduler file: \"%s\"", str);
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/* Parse ALPS scheduler information file (appinfo) for node list. */
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if (ORTE_SUCCESS != (ret = orte_ras_alps_read_appinfo_file(
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nodes, str,
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(unsigned int *)&orte_ras_alps_res_id))) {
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ORTE_ERROR_LOG(ret);
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goto cleanup;
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}
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free(str);
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/* record the number of allocated nodes */
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orte_num_allocated_nodes = opal_list_get_size(nodes);
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cleanup:
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/* All done */
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if (ORTE_SUCCESS == ret) {
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opal_output_verbose(1, orte_ras_base.ras_output,
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"ras:alps:allocate: success");
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} else {
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opal_output_verbose(1, orte_ras_base.ras_output,
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"ras:alps:allocate: failure (base_allocate_nodes=%d)", ret);
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}
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return ret;
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}
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#define RAS_BASE_FILE_MAX_LINE_LENGTH PATH_MAX*2
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static char *ras_alps_getline(FILE *fp)
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{
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char *ret, *buff = NULL;
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char input[RAS_BASE_FILE_MAX_LINE_LENGTH+1];
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ret = fgets(input, RAS_BASE_FILE_MAX_LINE_LENGTH, fp);
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if (NULL != ret) {
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input[strlen(input)-1] = '\0'; /* remove newline */
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buff = strdup(input);
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}
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return buff;
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}
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static int orte_ras_alps_read_appinfo_file(opal_list_t *nodes, char *filename, unsigned int *uMe)
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{
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int iq;
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int ix;
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int iFd; /* file descriptor for appinfo */
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int iTrips; /* counter appinfo read attempts */
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int max_appinfo_read_attempts;
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struct stat ssBuf; /* stat buffer */
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size_t szLen; /* size of appinfo (file) */
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off_t oNow; /* current appinfo data offset */
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off_t oInfo=sizeof(appInfoHdr_t);
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off_t oDet=sizeof(appInfo_t);
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off_t oSlots;
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off_t oEntry;
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int32_t sNodes=0;
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char *cpBuf;
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char *hostname;
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orte_node_t *node = NULL, *n2;
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appInfoHdr_t *apHdr; /* ALPS header structure */
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appInfo_t *apInfo; /* ALPS table info structure */
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cmdDetail_t *apDet; /* ALPS command details */
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placeList_t *apSlots; /* ALPS node specific info */
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bool added;
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opal_list_item_t *item;
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orte_ras_alps_get_appinfo_attempts(&max_appinfo_read_attempts);
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oNow=0;
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iTrips=0;
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while(!oNow) { /* Until appinfo read is complete */
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iTrips++; /* Increment trip count */
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iFd=open( filename, O_RDONLY );
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if( iFd==-1 ) { /* If file absent, ALPS is down */
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opal_output_verbose(1, orte_ras_base.ras_output,
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"ras:alps:allocate: ALPS information open failure");
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usleep(iTrips*50000); /* Increasing delays, .05 s/try */
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/* Fail only when number of attempts have been exhausted. */
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if( iTrips <= max_appinfo_read_attempts ) continue;
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ORTE_ERROR_LOG(ORTE_ERR_FILE_OPEN_FAILURE);
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return ORTE_ERR_FILE_OPEN_FAILURE;
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}
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if( fstat( iFd, &ssBuf )==-1 ) { /* If stat fails, access denied */
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ORTE_ERROR_LOG(ORTE_ERR_NOT_AVAILABLE);
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return ORTE_ERR_NOT_AVAILABLE;
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}
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szLen=ssBuf.st_size; /* Get buffer size */
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cpBuf=malloc(szLen+1); /* Allocate buffer */
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if (NULL == cpBuf) {
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ORTE_ERROR_LOG(ORTE_ERR_OUT_OF_RESOURCE);
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return ORTE_ERR_OUT_OF_RESOURCE;
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}
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/* Repeated attempts to read appinfo, with an increasing delay between *
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* successive attempts to allow scheduler I/O a chance to complete. */
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if( (oNow=read( iFd, cpBuf, szLen ))!=(off_t)szLen ) {
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/* This is where apstat fails; we will record it and try again. */
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opal_output_verbose(1, orte_ras_base.ras_output,
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"ras:alps:allocate: ALPS information read failure: %ld bytes", oNow);
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free(cpBuf); /* Free (old) buffer */
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close(iFd); /* Close (old) descriptor */
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oNow=0; /* Reset byte count */
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usleep(iTrips*50000); /* Increasing delays, .05 s/try */
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/* Fail only when number of attempts have been exhausted. */
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if( iTrips<=max_appinfo_read_attempts ) continue;
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ORTE_ERROR_LOG(ORTE_ERR_FILE_READ_FAILURE);
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return ORTE_ERR_FILE_READ_FAILURE;
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}
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}
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close(iFd);
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/* Now that we have the scheduler information, we just have to parse it for *
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* the data that we seek. */
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oNow=0;
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apHdr=(appInfoHdr_t *)cpBuf;
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/* Header info (apHdr) tells us how many entries are in the file: *
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* *
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* apHdr->apNum */
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for( iq=0; iq<apHdr->apNum; iq++ ) { /* Parse all entries in file */
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/* Just at this level, a lot of information is available: *
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* *
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* apInfo->apid ... ALPS job ID *
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* apInfo->resId ... ALPS reservation ID *
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* apInfo->numCmds ... Number of executables *
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* apInfo->numPlaces ... Number of PEs */
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apInfo=(appInfo_t *)(cpBuf+oNow+oInfo);
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/* Calculate the dependent offsets. */
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oSlots=sizeof(cmdDetail_t)*apInfo->numCmds;
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oEntry=sizeof(placeList_t)*apInfo->numPlaces;
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/* Also, we can extract details of commands currently running on nodes: *
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* *
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* apDet[].fixedPerNode ... PEs per node *
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* apDet[].nodeCnt ... number of nodes in use *
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* apDet[].memory ... MB/PE memory limit *
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* apDet[].cmd ... command being run */
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apDet=(cmdDetail_t *)(cpBuf+oNow+oInfo+oDet);
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/* Finally, we get to the actual node-specific information: *
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* *
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* apSlots[ix].cmdIx ... index of apDet[].cmd *
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* apSlots[ix].nid ... NodeID (NID) *
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* apSlots[ix].procMask ... mask for processors... need 16-bit shift */
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apSlots=(placeList_t *)(cpBuf+oNow+oInfo+oDet+oSlots);
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oNow+=(oDet+oSlots+oEntry); /* Target next slot */
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if( apInfo->resId != *uMe ) continue; /* Filter to our reservation Id */
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for( ix=0; ix<apInfo->numPlaces; ix++ ) {
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opal_output_verbose(5, orte_ras_base.ras_output,
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"ras:alps:read_appinfo: got NID %d", apSlots[ix].nid);
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asprintf( &hostname, "%d", apSlots[ix].nid );
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if (NULL == hostname) {
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ORTE_ERROR_LOG(ORTE_ERR_OUT_OF_RESOURCE);
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return ORTE_ERR_OUT_OF_RESOURCE;
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}
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/* If this matches the prior nodename, just add to the slot count. */
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if( NULL!=node && !strcmp(node->name, hostname) ) {
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free(hostname); /* free hostname since not needed */
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++node->slots;
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} else { /* must be new, so add to list */
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opal_output_verbose(1, orte_ras_base.ras_output,
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"ras:alps:read_appinfo: added NID %d to list", apSlots[ix].nid);
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node = OBJ_NEW(orte_node_t);
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node->name = hostname;
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node->launch_id = apSlots[ix].nid;
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node->slots_inuse = 0;
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node->slots_max = 0;
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node->slots = 1;
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/* need to order these node ids so the regex generator
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* can properly function
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*/
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added = false;
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for (item = opal_list_get_first(nodes);
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item != opal_list_get_end(nodes);
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item = opal_list_get_next(item)) {
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n2 = (orte_node_t*)item;
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if (node->launch_id < n2->launch_id) {
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/* insert the new node before this one */
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opal_list_insert_pos(nodes, item, &node->super);
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added = true;
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break;
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}
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}
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if (!added) {
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/* add it to the end */
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opal_list_append(nodes, &node->super);
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}
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sNodes++; /* Increment the node count */
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}
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}
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break; /* Extended details ignored */
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}
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free(cpBuf); /* Free the buffer */
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return ORTE_SUCCESS;
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}
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/*
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* There's really nothing to do here
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*/
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static int orte_ras_alps_finalize(void)
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{
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opal_output_verbose(1, orte_ras_base.ras_output,
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"ras:alps:finalize: success (nothing to do)");
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return ORTE_SUCCESS;
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}
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