Ubuntu Manpage: slurm_free_node_info_msg, slurm_load_node, slurm_load_node

NAME

       slurm_free_node_info_msg,             slurm_load_node,             slurm_load_node_single,
       slurm_print_node_info_msg, slurm_print_node_table, slurm_sprint_node_table  -  Slurm  node
       information reporting functions

SYNTAX

       #include <stdio.h>
       #include <slurm/slurm.h>

       void slurm_free_node_info_msg (
            node_info_msg_t *node_info_msg_ptr
       );

       int slurm_load_node (
            time_t update_time,
            node_info_msg_t **node_info_msg_pptr,
            uint16_t show_flags
       );

       int slurm_load_node_single (
            node_info_msg_t **node_info_msg_pptr,
            char *node_name,
            uint16_t show_flags
       );

       void slurm_print_node_info_msg (
            FILE *out_file,
            node_info_msg_t *node_info_msg_ptr,
            int one_liner
       );

       void slurm_print_node_table (
            FILE *out_file,
            node_info_t *node_ptr,
            int node_scaling
            int one_liner
       );

       char *slurm_sprint_node_table (
            node_info_t *node_ptr,
            int node_scaling
            int one_liner
       );

ARGUMENTS

node_info_msg_ptr
Specifies the pointer to the structure created by slurm_load_node.

node_info_msg_pptr
Specifies the double pointer to the structure to be created and filled with the
time of the last node update, a record count, and detailed information about each
node. Detailed node information is written to fixed sized records and includes:
name, state, processor count, memory size, etc. See slurm.h for full details on the
data structure's contents.

node_name
Name of the node for which information is requested.

node_ptr
Specifies a pointer to a single node record from the node_info_msg_ptr data
structure.

node_scaling
number of nodes each node represents default is 1.

one_liner
Print one record per line if non-zero.

out_file
Specifies the file to print data to.

show_flags
Job filtering flags, may be ORed. Information about nodes in partitions that are
configured as hidden and partitions that the user's group is unable to utilize are
not reported by default. The SHOW_ALL flag will cause information about nodes in
all partitions to be displayed.

update_time
For all of the following informational calls, if update_time is equal to or greater
than the last time changes where made to that information, new information is not
returned. Otherwise all the configuration. job, node, or partition records are
returned.

DESCRIPTION

       slurm_free_node_info_msg Release the storage generated by the slurm_load_node function.

       slurm_load_node_single issue RPC to get slurm configuration  information  for  a  specific
       node.

       slurm_load_node  Returns a node_info_msg_t that contains an update time, record count, and
       array of node_table records for all nodes.  Note that  nodes  which  are  hidden  for  any
       reason  will  have a NULL node name.  Other fields associated with the node will be filled
       in appropriately.  Reasons for a node being hidden include: a node state of FUTURE, a node
       in the CLOUD that is powered down, or a node in a hidden partition.

       slurm_print_node_info_msg  Prints  the  contents of the data structure describing all node
       records from the data loaded by the slurm_load_node function.

       slurm_print_node_table Prints the contents of the data structure describing a single  node
       record loaded by the slurm_load_node function.

RETURN VALUE

       On  success,  zero  is  returned.  On  error,  -1 is returned, and Slurm error code is set
       appropriately.

ERRORS

       SLURM_NO_CHANGE_IN_DATA Data has not changed since update_time.

       SLURM_PROTOCOL_VERSION_ERROR Protocol version has changed, re-link your code.

       SLURM_PROTOCOL_SOCKET_IMPL_TIMEOUT Timeout in communicating with SLURM controller.

EXAMPLE

       #include <stdio.h>
       #include <slurm/slurm.h>
       #include <slurm/slurm_errno.h>

       int main (int argc, char *argv[])
       {
            int i, j, k;
            partition_info_msg_t *part_info_ptr = NULL;
            partition_info_t *part_ptr;
            node_info_msg_t *node_info_ptr = NULL;
            node_info_t *node_ptr;

            /* get and dump some node information */
            if ( slurm_load_node ((time_t) NULL,
                                  &node_buffer_ptr, SHOW_ALL) ) {
                 slurm_perror ("slurm_load_node error");
                 exit (1);
            }

            /* The easy way to print... */
            slurm_print_node_info_msg (stdout, node_buffer_ptr, 0);

            /* A harder way.. */
            for (i = 0; i < node_buffer_ptr->record_count; i++) {
                 node_ptr = &node_buffer_ptr->node_array[i];
                 slurm_print_node_table(stdout, node_ptr, 0);
            }

            /* The hardest way. */
            for (i = 0; i < node_buffer_ptr->node_count; i++) {
                 printf ("NodeName=%s CPUs=%u\n",
                      node_buffer_ptr->node_array[i].name,
                      node_buffer_ptr->node_array[i].cpus);
            }

            /* get and dump some partition information */
            /* note that we use the node information loaded */
            /* above and we assume the node table entries have */
            /* not changed since */
            if ( slurm_load_partitions ((time_t) NULL,
                                        &part_buffer_ptr) ) {
                 slurm_perror ("slurm_load_partitions error");
                 exit (1);
            }
            for (i = 0; i < part_buffer_ptr->record_count; i++) {
                 part_ptr = &part_info_ptr->partition_array[i];
                 printf ("PartitionName=%s Nodes=",
                      part_ptr->name);
                 for (j = 0; part_ptr->node_inx; j+=2) {
                      if (part_ptr->node_inx[j] == -1)
                           break;
                      for (k = part_ptr->node_inx[j];
                           k <= part_ptr->node_inx[j+1];
                           k++) {
                           printf ("%s ", node_buffer_ptr->
                                   node_array[k].name);
                      }
                 }
                 printf("\n\n");
            }
            slurm_free_node_info_msg (node_buffer_ptr);
            slurm_free_partition_info (part_buffer_ptr);
            exit (0);
       }

NOTES

       These functions are included in the libslurm library, which must be linked to your process
       for use (e.g. "cc -lslurm myprog.c").

       Some  data  structures  contain  index  values  to  cross-reference  each  other.   If the
       show_flags argument is not set to SHOW_ALL when getting this data, these index values will
       be invalid.

COPYING

       Copyright (C) 2002-2006 The Regents of the University of California.  Produced at Lawrence
       Livermore National Laboratory (cf, DISCLAIMER).  CODE-OCEC-09-009. All rights reserved.

       This  file  is  part  of  SLURM,  a  resource  management  program.   For   details,   see
       <http://slurm.schedmd.com/>.

       SLURM  is  free  software; you can redistribute it and/or modify it under the terms of the
       GNU General Public License as published by the Free Software Foundation; either version  2
       of the License, or (at your option) any later version.

       SLURM is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
       even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
       GNU General Public License for more details.