Google Git
Sign in
third-party-mirror / SchedMD / slurm / 469648bcee60579bc1cfe7ef7c3534d297ba6aa5 / . / src / plugins / select / linear / select_linear.c
blob: 9edf5d1018b4659d47fee96b09871995d069ce0c [file] [log] [blame]
/*****************************************************************************\
* select_linear.c - node selection plugin for simple one-dimensional
* address space. Selects nodes for a job so as to minimize the number
* of sets of consecutive nodes using a best-fit algorithm.
*****************************************************************************
* Copyright (C) 2004-2007 The Regents of the University of California.
* Copyright (C) 2008-2010 Lawrence Livermore National Security.
* Copyright (C) SchedMD LLC.
* Copyright (C) 2014 Silicon Graphics International Corp. All rights reserved.
* Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
* Written by Morris Jette <jette1@llnl.gov>
* CODE-OCEC-09-009. All rights reserved.
*
* This file is part of Slurm, a resource management program.
* For details, see <https://slurm.schedmd.com/>.
* Please also read the included file: DISCLAIMER.
*
* 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.
*
* In addition, as a special exception, the copyright holders give permission
* to link the code of portions of this program with the OpenSSL library under
* certain conditions as described in each individual source file, and
* distribute linked combinations including the two. You must obey the GNU
* General Public License in all respects for all of the code used other than
* OpenSSL. If you modify file(s) with this exception, you may extend this
* exception to your version of the file(s), but you are not obligated to do
* so. If you do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source files in
* the program, then also delete it here.
*
* 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.
*
* You should have received a copy of the GNU General Public License along
* with Slurm; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
\*****************************************************************************/
#include "config.h"
#define _GNU_SOURCE
#include <inttypes.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <time.h>
#include <unistd.h>
#include "slurm/slurm.h"
#include "slurm/slurm_errno.h"
#include "src/common/slurm_xlator.h" /* Must be first */
#include "src/common/assoc_mgr.h"
#include "src/common/job_resources.h"
#include "src/common/list.h"
#include "src/common/log.h"
#include "src/common/parse_time.h"
#include "src/common/slurm_protocol_api.h"
#include "src/common/slurm_resource_info.h"
#include "src/common/xassert.h"
#include "src/common/xmalloc.h"
#include "src/common/xstring.h"
#include "src/interfaces/gres.h"
#include "src/interfaces/preempt.h"
#include "src/interfaces/select.h"
#include "src/interfaces/topology.h"
#include "src/slurmctld/slurmctld.h"
#include "src/slurmctld/licenses.h"
#include "src/slurmctld/proc_req.h"
#include "src/plugins/select/linear/select_linear.h"
#include "src/stepmgr/gres_stepmgr.h"
#define NO_SHARE_LIMIT 0xfffe
#define NODEINFO_MAGIC 0x82ad
#define RUN_JOB_INCR 16
#define SELECT_DEBUG 0
/* These are defined here so when we link with something other than
* the slurmctld we will have these symbols defined. They will get
* overwritten when linking with the slurmctld.
*/
#if defined (__APPLE__)
extern slurm_conf_t slurm_conf __attribute__((weak_import));
extern node_record_t **node_record_table_ptr __attribute__((weak_import));
extern list_t *part_list __attribute__((weak_import));
extern list_t *job_list __attribute__((weak_import));
extern int node_record_count __attribute__((weak_import));
extern time_t last_node_update __attribute__((weak_import));
extern slurmctld_config_t slurmctld_config __attribute__((weak_import));
#else
slurm_conf_t slurm_conf;
node_record_t **node_record_table_ptr;
list_t *part_list;
list_t *job_list;
int node_record_count;
time_t last_node_update;
slurmctld_config_t slurmctld_config;
#endif
static int _add_job_to_nodes(struct cr_record *cr_ptr, job_record_t *job_ptr,
char *pre_err, int suspended);
static void _add_run_job(struct cr_record *cr_ptr, uint32_t job_id);
static void _add_tot_job(struct cr_record *cr_ptr, uint32_t job_id);
static void _build_select_struct(job_record_t *job_ptr, bitstr_t *bitmap);
static int _cr_job_list_sort(void *x, void *y);
static job_resources_t *_create_job_resources(int node_cnt);
static int _decr_node_job_cnt(int node_inx, job_record_t *job_ptr,
char *pre_err);
static void _dump_node_cr(struct cr_record *cr_ptr);
static struct cr_record *_dup_cr(struct cr_record *cr_ptr);
static int _find_job_mate(job_record_t *job_ptr, bitstr_t *bitmap,
uint32_t min_nodes, uint32_t max_nodes,
uint32_t req_nodes);
static void _free_cr(struct cr_record *cr_ptr);
static int _get_avail_cpus(job_record_t *job_ptr, int index);
static uint16_t _get_total_cpus(int index);
static void _init_node_cr(void);
static int _job_count_bitmap(struct cr_record *cr_ptr,
job_record_t *job_ptr,
bitstr_t * bitmap, bitstr_t * jobmap,
int run_job_cnt, int tot_job_cnt, uint16_t mode);
static int _job_expand(job_record_t *from_job_ptr, job_record_t *to_job_ptr);
static int _job_test(job_record_t *job_ptr, bitstr_t *bitmap,
uint32_t min_nodes, uint32_t max_nodes,
uint32_t req_nodes);
static bool _rem_run_job(struct cr_record *cr_ptr, uint32_t job_id);
static bool _rem_tot_job(struct cr_record *cr_ptr, uint32_t job_id);
static int _rm_job_from_nodes(struct cr_record *cr_ptr,
job_record_t *job_ptr, char *pre_err,
bool remove_all, bool job_fini);
static int _rm_job_from_one_node(job_record_t *job_ptr, node_record_t *node_ptr,
char *pre_err);
static int _run_now(job_record_t *job_ptr, bitstr_t *bitmap,
uint32_t min_nodes, uint32_t max_nodes,
int max_share, uint32_t req_nodes,
list_t *preemptee_candidates,
list_t **preemptee_job_list);
static int _sort_usable_nodes_dec(void *, void *);
static bool _test_run_job(struct cr_record *cr_ptr, uint32_t job_id);
static bool _test_tot_job(struct cr_record *cr_ptr, uint32_t job_id);
static int _test_only(job_record_t *job_ptr, bitstr_t *bitmap,
uint32_t min_nodes, uint32_t max_nodes,
uint32_t req_nodes, int max_share);
static int _will_run_test(job_record_t *job_ptr, bitstr_t *bitmap,
uint32_t min_nodes, uint32_t max_nodes,
int max_share, uint32_t req_nodes,
list_t *preemptee_candidates,
list_t **preemptee_job_list);
/*
* These variables are required by the generic plugin interface. If they
* are not found in the plugin, the plugin loader will ignore it.
*
* plugin_name - a string giving a human-readable description of the
* plugin. There is no maximum length, but the symbol must refer to
* a valid string.
*
* plugin_type - a string suggesting the type of the plugin or its
* applicability to a particular form of data or method of data handling.
* If the low-level plugin API is used, the contents of this string are
* unimportant and may be anything. Slurm uses the higher-level plugin
* interface which requires this string to be of the form
*
* <application>/<method>
*
* where <application> is a description of the intended application of
* the plugin (e.g., "select" for Slurm node selection) and <method>
* is a description of how this plugin satisfies that application. Slurm will
* only load select plugins if the plugin_type string has a
* prefix of "select/".
*
* plugin_version - an unsigned 32-bit integer containing the Slurm version
* (major.minor.micro combined into a single number).
*/
const char plugin_name[] = "Linear node selection plugin";
const char plugin_type[] = "select/linear";
const uint32_t plugin_id = SELECT_PLUGIN_LINEAR;
const uint32_t plugin_version = SLURM_VERSION_NUMBER;
static uint16_t cr_type;
/* Record of resources consumed on each node including job details */
static struct cr_record *cr_ptr = NULL;
static pthread_mutex_t cr_mutex = PTHREAD_MUTEX_INITIALIZER;
/* Add job id to record of jobs running on this node */
static void _add_run_job(struct cr_record *cr_ptr, uint32_t job_id)
{
int i;
if (cr_ptr->run_job_ids == NULL) { /* create new array */
cr_ptr->run_job_len = RUN_JOB_INCR;
cr_ptr->run_job_ids = xcalloc(cr_ptr->run_job_len,
sizeof(uint32_t));
cr_ptr->run_job_ids[0] = job_id;
return;
}
for (i=0; i<cr_ptr->run_job_len; i++) {
if (cr_ptr->run_job_ids[i])
continue;
/* fill in hole */
cr_ptr->run_job_ids[i] = job_id;
return;
}
/* expand array and add to end */
cr_ptr->run_job_len += RUN_JOB_INCR;
xrealloc(cr_ptr->run_job_ids, sizeof(uint32_t) * cr_ptr->run_job_len);
cr_ptr->run_job_ids[i] = job_id;
}
/* Add job id to record of jobs running or suspended on this node */
static void _add_tot_job(struct cr_record *cr_ptr, uint32_t job_id)
{
int i;
if (cr_ptr->tot_job_ids == NULL) { /* create new array */
cr_ptr->tot_job_len = RUN_JOB_INCR;
cr_ptr->tot_job_ids = xcalloc(cr_ptr->tot_job_len,
sizeof(uint32_t));
cr_ptr->tot_job_ids[0] = job_id;
return;
}
for (i=0; i<cr_ptr->tot_job_len; i++) {
if (cr_ptr->tot_job_ids[i])
continue;
/* fill in hole */
cr_ptr->tot_job_ids[i] = job_id;
return;
}
/* expand array and add to end */
cr_ptr->tot_job_len += RUN_JOB_INCR;
xrealloc(cr_ptr->tot_job_ids, sizeof(uint32_t) * cr_ptr->tot_job_len);
cr_ptr->tot_job_ids[i] = job_id;
}
static bool _ck_run_job(struct cr_record *cr_ptr, uint32_t job_id,
bool clear_it)
{
int i;
bool rc = false;
if ((cr_ptr->run_job_ids == NULL) || (cr_ptr->run_job_len == 0))
return rc;
for (i=0; i<cr_ptr->run_job_len; i++) {
if (cr_ptr->run_job_ids[i] != job_id)
continue;
if (clear_it)
cr_ptr->run_job_ids[i] = 0;
rc = true;
}
return rc;
}
/* Remove job id from record of jobs running,
* RET true if successful, false if the job was not running */
static bool _rem_run_job(struct cr_record *cr_ptr, uint32_t job_id)
{
return _ck_run_job(cr_ptr, job_id, true);
}
/* Test for job id in record of jobs running,
* RET true if successful, false if the job was not running */
static bool _test_run_job(struct cr_record *cr_ptr, uint32_t job_id)
{
return _ck_run_job(cr_ptr, job_id, false);
}
static bool _ck_tot_job(struct cr_record *cr_ptr, uint32_t job_id,
bool clear_it)
{
int i;
bool rc = false;
if ((cr_ptr->tot_job_ids == NULL) || (cr_ptr->tot_job_len == 0))
return rc;
for (i=0; i<cr_ptr->tot_job_len; i++) {
if (cr_ptr->tot_job_ids[i] != job_id)
continue;
if (clear_it)
cr_ptr->tot_job_ids[i] = 0;
rc = true;
}
return rc;
}
/* Remove job id from record of jobs running or suspended,
* RET true if successful, false if the job was not found */
static bool _rem_tot_job(struct cr_record *cr_ptr, uint32_t job_id)
{
return _ck_tot_job(cr_ptr, job_id, true);
}
/* Test for job id in record of jobs running or suspended,
* RET true if successful, false if the job was not found */
static bool _test_tot_job(struct cr_record *cr_ptr, uint32_t job_id)
{
return _ck_tot_job(cr_ptr, job_id, false);
}
static bool _enough_nodes(int avail_nodes, int rem_nodes,
uint32_t min_nodes, uint32_t req_nodes)
{
int needed_nodes;
if (req_nodes > min_nodes)
needed_nodes = rem_nodes + min_nodes - req_nodes;
else
needed_nodes = rem_nodes;
return(avail_nodes >= needed_nodes);
}
/*
* _get_avail_cpus - Get the number of "available" cpus on a node
* given this number given the number of cpus_per_task and
* maximum sockets, cores, threads. Note that the value of
* cpus is the lowest-level logical processor (LLLP).
* IN job_ptr - pointer to job being scheduled
* IN index - index of node's configuration information in node_record_table_ptr
*/
static int _get_avail_cpus(job_record_t *job_ptr, int index)
{
node_record_t *node_ptr;
int avail_cpus;
uint16_t cpus_per_task = 1;
uint16_t ntasks_per_node = 0, ntasks_per_core;
multi_core_data_t *mc_ptr = NULL;
if (job_ptr->details == NULL)
return (uint16_t) 0;
if (job_ptr->details->cpus_per_task)
cpus_per_task = job_ptr->details->cpus_per_task;
if (job_ptr->details->ntasks_per_node)
ntasks_per_node = job_ptr->details->ntasks_per_node;
if ((mc_ptr = job_ptr->details->mc_ptr))
ntasks_per_core = mc_ptr->ntasks_per_core;
else
ntasks_per_core = 0;
node_ptr = node_record_table_ptr[index];
#if SELECT_DEBUG
info("host:%s HW_ cpus_per_node:%u boards_per_node:%u "
"sockets_per_boards:%u cores_per_socket:%u thread_per_core:%u ",
node_ptr->name, node_ptr->cpus, node_ptr->boards,
node_ptr->tot_sockets / node_ptr->boards, node_ptr->cores,
node_ptr->threads);
#endif
avail_cpus = adjust_cpus_nppcu(ntasks_per_core, cpus_per_task,
node_ptr->tot_cores, node_ptr->cpus);
if (ntasks_per_node > 0)
avail_cpus = MIN(avail_cpus, ntasks_per_node * cpus_per_task);
#if SELECT_DEBUG
debug("avail_cpus index %d = %u (out of boards_per_node:%u "
"sockets_per_boards:%u cores_per_socket:%u thread_per_core:%u)",
index, avail_cpus, node_ptr->boards,
node_ptr->tot_sockets / node_ptr->boards, node_ptr->cores,
node_ptr->threads);
#endif
return(avail_cpus);
}
/*
* _get_total_cpus - Get the total number of cpus on a node
* Note that the value of cpus is the lowest-level logical
* processor (LLLP).
* IN index - index of node's configuration information in node_record_table_ptr
*/
static uint16_t _get_total_cpus(int index)
{
node_record_t *node_ptr = node_record_table_ptr[index];
return node_ptr->config_ptr->cpus;
}
static job_resources_t *_create_job_resources(int node_cnt)
{
job_resources_t *job_resrcs_ptr;
job_resrcs_ptr = create_job_resources();
job_resrcs_ptr->cpu_array_reps = xcalloc(node_cnt, sizeof(uint32_t));
job_resrcs_ptr->cpu_array_value = xcalloc(node_cnt, sizeof(uint16_t));
job_resrcs_ptr->cpus = xcalloc(node_cnt, sizeof(uint16_t));
job_resrcs_ptr->cpus_used = xcalloc(node_cnt, sizeof(uint16_t));
job_resrcs_ptr->memory_allocated = xcalloc(node_cnt, sizeof(uint64_t));
job_resrcs_ptr->memory_used = xcalloc(node_cnt, sizeof(uint64_t));
job_resrcs_ptr->nhosts = node_cnt;
return job_resrcs_ptr;
}
/* Build the full job_resources_t *structure for a job based upon the nodes
* allocated to it (the bitmap) and the job's memory requirement */
static void _build_select_struct(job_record_t *job_ptr, bitstr_t *bitmap)
{
uint32_t node_cpus, total_cpus = 0, node_cnt;
uint64_t job_memory_cpu = 0, job_memory_node = 0, min_mem = 0;
job_resources_t *job_resrcs_ptr;
node_record_t *node_ptr;
if (job_ptr->details->pn_min_memory && (cr_type & SELECT_MEMORY)) {
if (job_ptr->details->pn_min_memory & MEM_PER_CPU)
job_memory_cpu = job_ptr->details->pn_min_memory &
(~MEM_PER_CPU);
else
job_memory_node = job_ptr->details->pn_min_memory;
}
if (job_ptr->job_resrcs) /* Old struct due to job requeue */
free_job_resources(&job_ptr->job_resrcs);
node_cnt = bit_set_count(bitmap);
job_ptr->job_resrcs = job_resrcs_ptr = _create_job_resources(node_cnt);
job_resrcs_ptr->node_bitmap = bit_copy(bitmap);
job_resrcs_ptr->nodes = bitmap2node_name(bitmap);
job_resrcs_ptr->ncpus = job_ptr->total_cpus;
job_resrcs_ptr->threads_per_core =
job_ptr->details->mc_ptr->threads_per_core;
job_resrcs_ptr->cr_type = cr_type | SELECT_LINEAR;
if (build_job_resources(job_resrcs_ptr))
error("_build_select_struct: build_job_resources: %m");
for (int i = 0, j = 0, k = -1;
(node_ptr = next_node_bitmap(bitmap, &i)); i++) {
node_cpus = _get_total_cpus(i);
/* Use all CPUs for accounting */
job_resrcs_ptr->cpus[j] = node_cpus;
total_cpus += node_cpus;
/*
* Get the usable cpu count for cpu_array_value and memory
* allocation. Steps in the job will use this to know how
* many cpus they can use. This is needed so steps avoid
* allocating too many cpus with --threads-per-core and then
* fail to launch.
*/
node_cpus = job_resources_get_node_cpu_cnt(job_resrcs_ptr,
j, i);
if ((k == -1) ||
(job_resrcs_ptr->cpu_array_value[k] != node_cpus)) {
job_resrcs_ptr->cpu_array_cnt++;
job_resrcs_ptr->cpu_array_reps[++k] = 1;
job_resrcs_ptr->cpu_array_value[k] = node_cpus;
} else
job_resrcs_ptr->cpu_array_reps[k]++;
if (job_memory_node) {
job_resrcs_ptr->memory_allocated[j] = job_memory_node;
} else if (job_memory_cpu) {
job_resrcs_ptr->memory_allocated[j] =
job_memory_cpu * node_cpus;
} else if (cr_type & SELECT_MEMORY) {
job_resrcs_ptr->memory_allocated[j] =
node_ptr->config_ptr->real_memory;
if (!min_mem ||
(min_mem > job_resrcs_ptr->memory_allocated[j])) {
min_mem = job_resrcs_ptr->memory_allocated[j];
}
}
if (set_job_resources_node(job_resrcs_ptr, j)) {
error("_build_select_struct: set_job_resources_node: "
"%m");
}
j++;
}
if (cr_type & SELECT_MEMORY && !job_ptr->details->pn_min_memory)
job_ptr->details->pn_min_memory = min_mem;
if (job_resrcs_ptr->ncpus != total_cpus) {
error("_build_select_struct: ncpus mismatch %u != %u",
job_resrcs_ptr->ncpus, total_cpus);
}
}
/*
* Set the bits in 'jobmap' that correspond to bits in the 'bitmap'
* that are running 'run_job_cnt' jobs or less, and clear the rest.
*/
static int _job_count_bitmap(struct cr_record *cr_ptr,
job_record_t *job_ptr,
bitstr_t * bitmap, bitstr_t * jobmap,
int run_job_cnt, int tot_job_cnt, uint16_t mode)
{
int count = 0, total_jobs, total_run_jobs;
struct part_cr_record *part_cr_ptr;
node_record_t *node_ptr;
uint64_t job_memory_cpu = 0, job_memory_node = 0;
uint64_t alloc_mem = 0, job_mem = 0, avail_mem = 0;
uint32_t cpu_cnt, gres_cpus, gres_cores;
int core_start_bit, core_end_bit, cpus_per_core;
list_t *gres_list;
bool use_total_gres = true;
xassert(cr_ptr);
xassert(cr_ptr->nodes);
if (mode != SELECT_MODE_TEST_ONLY) {
use_total_gres = false;
if (job_ptr->details->pn_min_memory &&
(cr_type & SELECT_MEMORY)) {
if (job_ptr->details->pn_min_memory & MEM_PER_CPU) {
job_memory_cpu = job_ptr->details->pn_min_memory
& (~MEM_PER_CPU);
} else {
job_memory_node = job_ptr->details->
pn_min_memory;
}
}
}
bit_and(jobmap, bitmap);
for (int i = 0; (node_ptr = next_node_bitmap(bitmap, &i)); i++) {
cpu_cnt = node_ptr->config_ptr->cpus;
if (cr_ptr->nodes[i].gres_list)
gres_list = cr_ptr->nodes[i].gres_list;
else
gres_list = node_ptr->gres_list;
core_start_bit = cr_get_coremap_offset(i);
core_end_bit = cr_get_coremap_offset(i+1) - 1;
cpus_per_core = cpu_cnt / (core_end_bit - core_start_bit + 1);
gres_cores = gres_job_test(job_ptr->gres_list_req, gres_list,
use_total_gres, core_start_bit,
core_end_bit, job_ptr->job_id,
node_ptr->name);
gres_cpus = gres_cores;
if (gres_cpus != NO_VAL) {
gres_cpus *= cpus_per_core;
if ((gres_cpus < cpu_cnt) ||
(gres_cpus < job_ptr->details->ntasks_per_node) ||
((job_ptr->details->cpus_per_task > 1) &&
(gres_cpus < job_ptr->details->cpus_per_task))) {
bit_clear(jobmap, i);
continue;
}
}
if (mode == SELECT_MODE_TEST_ONLY) {
bit_set(jobmap, i);
count++;
continue; /* No need to test other resources */
}
if (!job_memory_cpu && !job_memory_node &&
(cr_type & SELECT_MEMORY))
job_memory_node = node_ptr->config_ptr->real_memory;
if (job_memory_cpu || job_memory_node) {
alloc_mem = cr_ptr->nodes[i].alloc_memory;
avail_mem = node_ptr->config_ptr->real_memory;
if (job_memory_cpu)
job_mem = job_memory_cpu * cpu_cnt;
else
job_mem = job_memory_node;
avail_mem -= node_ptr->mem_spec_limit;
if ((alloc_mem + job_mem) > avail_mem) {
bit_clear(jobmap, i);
continue;
}
}
if ((mode != SELECT_MODE_TEST_ONLY) &&
(cr_ptr->nodes[i].exclusive_cnt != 0)) {
/* already reserved by some exclusive job */
bit_clear(jobmap, i);
continue;
}
total_jobs = 0;
total_run_jobs = 0;
part_cr_ptr = cr_ptr->nodes[i].parts;
while (part_cr_ptr) {
total_run_jobs += part_cr_ptr->run_job_cnt;
total_jobs += part_cr_ptr->tot_job_cnt;
part_cr_ptr = part_cr_ptr->next;
}
if ((total_run_jobs <= run_job_cnt) &&
(total_jobs <= tot_job_cnt)) {
bit_set(jobmap, i);
count++;
} else {
bit_clear(jobmap, i);
}
}
return count;
}
/* _find_job_mate - does most of the real work for select_p_job_test(),
* in trying to find a suitable job to mate this one with. This is
* a pretty simple algorithm now, but could try to match the job
* with multiple jobs that add up to the proper size or a single
* job plus a few idle nodes. */
static int _find_job_mate(job_record_t *job_ptr, bitstr_t *bitmap,
uint32_t min_nodes, uint32_t max_nodes,
uint32_t req_nodes)
{
list_itr_t *job_iterator;
job_record_t *job_scan_ptr;
int rc = EINVAL;
job_iterator = list_iterator_create(job_list);
while ((job_scan_ptr = list_next(job_iterator))) {
if ((!IS_JOB_RUNNING(job_scan_ptr)) ||
(job_scan_ptr->node_cnt != req_nodes) ||
(job_scan_ptr->total_cpus <
job_ptr->details->min_cpus) ||
(!bit_super_set(job_scan_ptr->node_bitmap, bitmap)))
continue;
if (job_scan_ptr->details && job_ptr->details &&
(job_scan_ptr->details->contiguous !=
job_ptr->details->contiguous))
continue;
if (job_ptr->details->req_node_bitmap &&
(!bit_super_set(job_ptr->details->req_node_bitmap,
job_scan_ptr->node_bitmap)))
continue; /* Required nodes missing from job */
if (job_ptr->details->exc_node_bitmap &&
bit_overlap_any(job_ptr->details->exc_node_bitmap,
job_scan_ptr->node_bitmap))
continue; /* Excluded nodes in this job */
bit_and(bitmap, job_scan_ptr->node_bitmap);
job_ptr->total_cpus = job_scan_ptr->total_cpus;
rc = SLURM_SUCCESS;
break;
}
list_iterator_destroy(job_iterator);
return rc;
}
/* _job_test - does most of the real work for select_p_job_test(), which
* pretty much just handles load-leveling and max_share logic */
static int _job_test(job_record_t *job_ptr, bitstr_t *bitmap,
uint32_t min_nodes, uint32_t max_nodes,
uint32_t req_nodes)
{
int i, error_code = EINVAL, sufficient;
int *consec_nodes; /* how many nodes we can add from this
* consecutive set of nodes */
int *consec_cpus; /* how many nodes we can add from this
* consecutive set of nodes */
int *consec_start; /* where this consecutive set starts (index) */
int *consec_end; /* where this consecutive set ends (index) */
int *consec_req; /* are nodes from this set required
* (in req_bitmap) */
int consec_index, consec_size;
int rem_cpus, rem_nodes; /* remaining resources desired */
int best_fit_nodes, best_fit_cpus, best_fit_req;
int best_fit_location = 0, best_fit_sufficient;
int avail_cpus, total_cpus = 0;
int *avail_cpu_cnt; /* Available CPU count on each node */
int first_cpu_cnt = 0, total_node_cnt = 0, low_cpu_cnt = 99999;
bool heterogeneous = false; /* Nodes have heterogeneous CPU counts */
if (bit_set_count(bitmap) < min_nodes)
return error_code;
if ((job_ptr->details->req_node_bitmap) &&
(!bit_super_set(job_ptr->details->req_node_bitmap, bitmap)))
return error_code;
consec_index = 0;
consec_size = 50; /* start allocation for 50 sets of
* consecutive nodes */
consec_cpus = xcalloc(consec_size, sizeof(int));
consec_nodes = xcalloc(consec_size, sizeof(int));
consec_start = xcalloc(consec_size, sizeof(int));
consec_end = xcalloc(consec_size, sizeof(int));
consec_req = xcalloc(consec_size, sizeof(int));
/* Build table with information about sets of consecutive nodes */
consec_cpus[consec_index] = consec_nodes[consec_index] = 0;
consec_req[consec_index] = -1; /* no required nodes here by default */
rem_cpus = job_ptr->details->min_cpus;
if (req_nodes > min_nodes)
rem_nodes = req_nodes;
else
rem_nodes = min_nodes;
avail_cpu_cnt = xcalloc(node_record_count, sizeof(int));
for (i = 0; next_node(&i); i++) {
if (bit_test(bitmap, i)) {
avail_cpu_cnt[i] = _get_avail_cpus(job_ptr, i);
if (++total_node_cnt == 1)
first_cpu_cnt = avail_cpu_cnt[i];
else if (first_cpu_cnt != avail_cpu_cnt[i])
heterogeneous = true;
low_cpu_cnt = MIN(low_cpu_cnt, avail_cpu_cnt[i]);
if (consec_nodes[consec_index] == 0)
consec_start[consec_index] = i;
avail_cpus = avail_cpu_cnt[i];
if (job_ptr->details->req_node_bitmap &&
(max_nodes > 0) &&
bit_test(job_ptr->details->req_node_bitmap, i)) {
if (consec_req[consec_index] == -1) {
/* first required node in set */
consec_req[consec_index] = i;
}
rem_nodes--;
max_nodes--;
rem_cpus -= avail_cpus;
total_cpus += _get_total_cpus(i);
} else { /* node not required (yet) */
bit_clear(bitmap, i);
consec_cpus[consec_index] += avail_cpus;
consec_nodes[consec_index]++;
}
} else if (consec_nodes[consec_index] == 0) {
consec_req[consec_index] = -1;
/* already picked up any required nodes */
/* reuse this record */
} else {
consec_end[consec_index] = i - 1;
if (++consec_index >= consec_size) {
consec_size *= 2;
xrealloc(consec_cpus,
sizeof(int) * consec_size);
xrealloc(consec_nodes,
sizeof(int) * consec_size);
xrealloc(consec_start,
sizeof(int) * consec_size);
xrealloc(consec_end,
sizeof(int) * consec_size);
xrealloc(consec_req,
sizeof(int) * consec_size);
}
consec_cpus[consec_index] = 0;
consec_nodes[consec_index] = 0;
consec_req[consec_index] = -1;
}
}
if (consec_nodes[consec_index] != 0)
consec_end[consec_index++] = i - 1;
#if SELECT_DEBUG
/* don't compile this, it slows things down too much */
debug3("rem_cpus=%d, rem_nodes=%d", rem_cpus, rem_nodes);
for (i = 0; i < consec_index; i++) {
if (consec_req[i] != -1)
debug3("start=%s, end=%s, nodes=%d, cpus=%d, req=%s",
node_record_table_ptr[consec_start[i]]->name,
node_record_table_ptr[consec_end[i]]->name,
consec_nodes[i], consec_cpus[i],
node_record_table_ptr[consec_req[i]]->name);
else
debug3("start=%s, end=%s, nodes=%d, cpus=%d",
node_record_table_ptr[consec_start[i]]->name,
node_record_table_ptr[consec_end[i]]->name,
consec_nodes[i], consec_cpus[i]);
}
#endif
if (heterogeneous && (rem_cpus > (low_cpu_cnt * rem_nodes))) {
while ((max_nodes > 0) &&
((rem_nodes > 0) || (rem_cpus > 0))) {
int high_cpu_cnt = 0, high_cpu_inx = -1;
for (i = 0; next_node(&i); i++) {
if (high_cpu_cnt > avail_cpu_cnt[i])
continue;
if (bit_test(bitmap, i))
continue;
high_cpu_cnt = avail_cpu_cnt[i];
high_cpu_inx = i;
}
if (high_cpu_inx == -1)
break; /* No more available CPUs */
bit_set(bitmap, high_cpu_inx);
rem_nodes--;
max_nodes--;
avail_cpus = avail_cpu_cnt[high_cpu_inx];
rem_cpus -= avail_cpus;
total_cpus +=_get_total_cpus(high_cpu_inx);
avail_cpu_cnt[high_cpu_inx] = 0;
}
} else {
heterogeneous = false;
}
/* accumulate nodes from these sets of consecutive nodes until */
/* sufficient resources have been accumulated */
while (consec_index && (max_nodes > 0) && !heterogeneous) {
best_fit_cpus = best_fit_nodes = best_fit_sufficient = 0;
best_fit_req = -1; /* first required node, -1 if none */
for (i = 0; i < consec_index; i++) {
if (consec_nodes[i] == 0)
continue; /* no usable nodes here */
if (job_ptr->details->contiguous &&
job_ptr->details->req_node_bitmap &&
(consec_req[i] == -1))
continue; /* no required nodes here */
sufficient = (consec_cpus[i] >= rem_cpus) &&
_enough_nodes(consec_nodes[i], rem_nodes,
min_nodes, req_nodes);
/* if first possibility OR */
/* contains required nodes OR */
/* first set large enough for request OR */
/* tightest fit (less resource waste) OR */
/* nothing yet large enough, but this is biggest */
if ((best_fit_nodes == 0) ||
((best_fit_req == -1) && (consec_req[i] != -1)) ||
(sufficient && (best_fit_sufficient == 0)) ||
(sufficient && (consec_cpus[i] < best_fit_cpus)) ||
((sufficient == 0) &&
(consec_cpus[i] > best_fit_cpus))) {
best_fit_cpus = consec_cpus[i];
best_fit_nodes = consec_nodes[i];
best_fit_location = i;
best_fit_req = consec_req[i];
best_fit_sufficient = sufficient;
}
if (job_ptr->details->contiguous &&
job_ptr->details->req_node_bitmap) {
/* Must wait for all required nodes to be
* in a single consecutive block */
int j, other_blocks = 0;
for (j = (i+1); j < consec_index; j++) {
if (consec_req[j] != -1) {
other_blocks = 1;
break;
}
}
if (other_blocks) {
best_fit_nodes = 0;
break;
}
}
}
if (best_fit_nodes == 0)
break;
if (job_ptr->details->contiguous &&
((best_fit_cpus < rem_cpus) ||
(!_enough_nodes(best_fit_nodes, rem_nodes,
min_nodes, req_nodes))))
break; /* no hole large enough */
if (best_fit_req != -1) {
/* This collection of nodes includes required ones
* select nodes from this set, first working up
* then down from the required nodes */
for (i = best_fit_req;
i <= consec_end[best_fit_location]; i++) {
if ((max_nodes <= 0) ||
((rem_nodes <= 0) && (rem_cpus <= 0)))
break;
if (bit_test(bitmap, i))
continue;
bit_set(bitmap, i);
rem_nodes--;
max_nodes--;
avail_cpus = avail_cpu_cnt[i];
rem_cpus -= avail_cpus;
total_cpus += _get_total_cpus(i);
}
for (i = (best_fit_req - 1);
i >= consec_start[best_fit_location]; i--) {
if ((max_nodes <= 0) ||
((rem_nodes <= 0) && (rem_cpus <= 0)))
break;
if (bit_test(bitmap, i))
continue;
bit_set(bitmap, i);
rem_nodes--;
max_nodes--;
avail_cpus = avail_cpu_cnt[i];
rem_cpus -= avail_cpus;
total_cpus += _get_total_cpus(i);
}
} else {
for (i = consec_start[best_fit_location];
i <= consec_end[best_fit_location]; i++) {
if ((max_nodes <= 0) ||
((rem_nodes <= 0) && (rem_cpus <= 0)))
break;
if (bit_test(bitmap, i))
continue;
bit_set(bitmap, i);
rem_nodes--;
max_nodes--;
avail_cpus = avail_cpu_cnt[i];
rem_cpus -= avail_cpus;
total_cpus += _get_total_cpus(i);
}
}
if (job_ptr->details->contiguous ||
((rem_nodes <= 0) && (rem_cpus <= 0))) {
error_code = SLURM_SUCCESS;
break;
}
consec_cpus[best_fit_location] = 0;
consec_nodes[best_fit_location] = 0;
}
if (error_code && (rem_cpus <= 0) &&
_enough_nodes(0, rem_nodes, min_nodes, req_nodes)) {
error_code = SLURM_SUCCESS;
}
if (error_code == SLURM_SUCCESS) {
/* job's total_cpus is needed for SELECT_MODE_WILL_RUN */
job_ptr->total_cpus = total_cpus;
}
xfree(avail_cpu_cnt);
xfree(consec_cpus);
xfree(consec_nodes);
xfree(consec_start);
xfree(consec_end);
xfree(consec_req);
return error_code;
}
/*
* deallocate resources that were assigned to this job
*
* if remove_all = false: the job has been suspended, so just deallocate CPUs
* if remove_all = true: deallocate all resources
*/
static int _rm_job_from_nodes(struct cr_record *cr_ptr, job_record_t *job_ptr,
char *pre_err, bool remove_all, bool job_fini)
{
int node_offset, rc = SLURM_SUCCESS;
struct part_cr_record *part_cr_ptr;
job_resources_t *job_resrcs_ptr;
uint64_t job_memory = 0, job_memory_cpu = 0, job_memory_node = 0;
bool exclusive, is_job_running;
uint16_t cpu_cnt;
node_record_t *node_ptr;
bool old_job = false;
if (cr_ptr == NULL) {
error("%s: cr_ptr not initialized", pre_err);
return SLURM_ERROR;
}
if (_rem_tot_job(cr_ptr, job_ptr->job_id) == 0) {
info("%s: %pJ has no resources allocated",
plugin_type, job_ptr);
return SLURM_ERROR;
}
if (job_ptr->start_time < slurmctld_config.boot_time)
old_job = true;
if (remove_all && job_ptr->details &&
job_ptr->details->pn_min_memory && (cr_type & SELECT_MEMORY)) {
if (job_ptr->details->pn_min_memory & MEM_PER_CPU) {
job_memory_cpu = job_ptr->details->pn_min_memory &
(~MEM_PER_CPU);
} else
job_memory_node = job_ptr->details->pn_min_memory;
}
if ((job_resrcs_ptr = job_ptr->job_resrcs) == NULL) {
error("%pJ lacks a job_resources struct", job_ptr);
return SLURM_ERROR;
}
is_job_running = _rem_run_job(cr_ptr, job_ptr->job_id);
exclusive = (job_ptr->details->share_res == 0);
node_offset = -1;
for (int i = 0;
(node_ptr = next_node_bitmap(job_resrcs_ptr->node_bitmap, &i));
i++) {
node_offset++;
if (!job_ptr->node_bitmap || !bit_test(job_ptr->node_bitmap, i))
continue;
cpu_cnt = node_ptr->config_ptr->cpus;
if (job_memory_cpu)
job_memory = job_memory_cpu * cpu_cnt;
else if (job_memory_node)
job_memory = job_memory_node;
else if (cr_type & SELECT_MEMORY)
job_memory = node_ptr->config_ptr->real_memory;
if (cr_ptr->nodes[i].alloc_memory >= job_memory)
cr_ptr->nodes[i].alloc_memory -= job_memory;
else {
debug("%s: memory underflow for node %s",
pre_err, node_ptr->name);
cr_ptr->nodes[i].alloc_memory = 0;
}
if (remove_all) {
list_t *node_gres_list;
if (cr_ptr->nodes[i].gres_list)
node_gres_list = cr_ptr->nodes[i].gres_list;
else
node_gres_list = node_ptr->gres_list;
gres_stepmgr_job_dealloc(job_ptr->gres_list_alloc,
node_gres_list, node_offset,
job_ptr->job_id,
node_ptr->name,
old_job, false);
gres_node_state_log(node_gres_list, node_ptr->name);
}
if (exclusive) {
if (cr_ptr->nodes[i].exclusive_cnt)
cr_ptr->nodes[i].exclusive_cnt--;
else {
error("%s: exclusive_cnt underflow for "
"node %s", pre_err, node_ptr->name);
}
}
part_cr_ptr = cr_ptr->nodes[i].parts;
while (part_cr_ptr) {
if (part_cr_ptr->part_ptr != job_ptr->part_ptr) {
part_cr_ptr = part_cr_ptr->next;
continue;
}
if (!is_job_running)
/* cancelled job already suspended */;
else if (part_cr_ptr->run_job_cnt > 0)
part_cr_ptr->run_job_cnt--;
else {
error("%s: run_job_cnt underflow for node %s",
pre_err, node_ptr->name);
}
if (remove_all) {
if (part_cr_ptr->tot_job_cnt > 0)
part_cr_ptr->tot_job_cnt--;
else {
error("%s: tot_job_cnt underflow "
"for node %s",
pre_err, node_ptr->name);
}
if ((part_cr_ptr->tot_job_cnt == 0) &&
(part_cr_ptr->run_job_cnt)) {
part_cr_ptr->run_job_cnt = 0;
error("%s: run_job_cnt out of sync "
"for node %s",
pre_err, node_ptr->name);
}
}
break;
}
if (part_cr_ptr == NULL) {
if (job_ptr->part_nodes_missing) {
;
} else if (job_ptr->part_ptr) {
info("%s: %pJ and its partition %s no longer contain node %s",
pre_err, job_ptr,
job_ptr->partition, node_ptr->name);
} else {
info("%s: %pJ has no pointer to partition %s and node %s",
pre_err, job_ptr,
job_ptr->partition, node_ptr->name);
}
job_ptr->part_nodes_missing = true;
rc = SLURM_ERROR;
}
}
return rc;
}
/* Move all resources from one job to another */
static int _job_expand(job_record_t *from_job_ptr, job_record_t *to_job_ptr)
{
int i, node_cnt, rc = SLURM_SUCCESS;
job_resources_t *from_job_resrcs_ptr, *to_job_resrcs_ptr,
*new_job_resrcs_ptr;
bool from_node_used, to_node_used;
int from_node_offset, to_node_offset, new_node_offset;
int first_bit, last_bit;
bitstr_t *tmp_bitmap, *tmp_bitmap2;
xassert(from_job_ptr);
xassert(to_job_ptr);
if (cr_ptr == NULL) {
error("%s: cr_ptr not initialized", plugin_type);
return SLURM_ERROR;
}
if (from_job_ptr->job_id == to_job_ptr->job_id) {
error("%s: attempt to merge %pJ with self",
plugin_type, from_job_ptr);
return SLURM_ERROR;
}
if (_test_tot_job(cr_ptr, from_job_ptr->job_id) == 0) {
info("%s: %pJ has no resources allocated",
plugin_type, from_job_ptr);
return SLURM_ERROR;
}
if (_test_tot_job(cr_ptr, to_job_ptr->job_id) == 0) {
info("%s: %pJ has no resources allocated",
plugin_type, to_job_ptr);
return SLURM_ERROR;
}
from_job_resrcs_ptr = from_job_ptr->job_resrcs;
if ((from_job_resrcs_ptr == NULL) ||
(from_job_resrcs_ptr->cpus == NULL) ||
(from_job_resrcs_ptr->node_bitmap == NULL)) {
error("%s: %pJ lacks a job_resources struct",
plugin_type, from_job_ptr);
return SLURM_ERROR;
}
to_job_resrcs_ptr = to_job_ptr->job_resrcs;
if ((to_job_resrcs_ptr == NULL) ||
(to_job_resrcs_ptr->cpus == NULL) ||
(to_job_resrcs_ptr->node_bitmap == NULL)) {
error("%s: %pJ lacks a job_resources struct",
plugin_type, to_job_ptr);
return SLURM_ERROR;
}
(void) _rm_job_from_nodes(cr_ptr, from_job_ptr, "select_p_job_expand",
true, true);
(void) _rm_job_from_nodes(cr_ptr, to_job_ptr, "select_p_job_expand",
true, true);
if (to_job_resrcs_ptr->core_bitmap_used)
bit_clear_all(to_job_resrcs_ptr->core_bitmap_used);
tmp_bitmap = bit_copy(to_job_resrcs_ptr->node_bitmap);
bit_or(tmp_bitmap, from_job_resrcs_ptr->node_bitmap);
tmp_bitmap2 = bit_copy(to_job_ptr->node_bitmap);
bit_or(tmp_bitmap2, from_job_ptr->node_bitmap);
bit_and(tmp_bitmap, tmp_bitmap2);
FREE_NULL_BITMAP(tmp_bitmap2);
node_cnt = bit_set_count(tmp_bitmap);
new_job_resrcs_ptr = _create_job_resources(node_cnt);
new_job_resrcs_ptr->ncpus = from_job_resrcs_ptr->ncpus +
to_job_resrcs_ptr->ncpus;
new_job_resrcs_ptr->node_req = to_job_resrcs_ptr->node_req;
new_job_resrcs_ptr->node_bitmap = tmp_bitmap;
new_job_resrcs_ptr->nodes = bitmap2node_name(new_job_resrcs_ptr->
node_bitmap);
new_job_resrcs_ptr->threads_per_core =
to_job_resrcs_ptr->threads_per_core;
new_job_resrcs_ptr->cr_type = to_job_resrcs_ptr->cr_type;
build_job_resources(new_job_resrcs_ptr);
to_job_ptr->total_cpus = 0;
first_bit = MIN(bit_ffs(from_job_resrcs_ptr->node_bitmap),
bit_ffs(to_job_resrcs_ptr->node_bitmap));
last_bit = MAX(bit_fls(from_job_resrcs_ptr->node_bitmap),
bit_fls(to_job_resrcs_ptr->node_bitmap));
from_node_offset = to_node_offset = new_node_offset = -1;
for (i = first_bit; i <= last_bit; i++) {
from_node_used = to_node_used = false;
if (bit_test(from_job_resrcs_ptr->node_bitmap, i)) {
from_node_used = bit_test(from_job_ptr->node_bitmap,i);
from_node_offset++;
}
if (bit_test(to_job_resrcs_ptr->node_bitmap, i)) {
to_node_used = bit_test(to_job_ptr->node_bitmap, i);
to_node_offset++;
}
if (!from_node_used && !to_node_used)
continue;
new_node_offset++;
if (from_node_used) {
/* Merge alloc info from both "from" and "to" jobs,
* leave "from" job with no allocated CPUs or memory */
new_job_resrcs_ptr->cpus[new_node_offset] =
from_job_resrcs_ptr->cpus[from_node_offset];
from_job_resrcs_ptr->cpus[from_node_offset] = 0;
/* new_job_resrcs_ptr->cpus_used[new_node_offset] =
from_job_resrcs_ptr->
cpus_used[from_node_offset]; Should be 0 */
new_job_resrcs_ptr->memory_allocated[new_node_offset] =
from_job_resrcs_ptr->
memory_allocated[from_node_offset];
/* new_job_resrcs_ptr->memory_used[new_node_offset] =
from_job_resrcs_ptr->
memory_used[from_node_offset]; Should be 0 */
job_resources_bits_copy(new_job_resrcs_ptr,
new_node_offset,
from_job_resrcs_ptr,
from_node_offset);
}
if (to_node_used) {
/* Merge alloc info from both "from" and "to" jobs */
/* DO NOT double count the allocated CPUs in partition
* with Shared nodes */
new_job_resrcs_ptr->cpus[new_node_offset] =
to_job_resrcs_ptr->cpus[to_node_offset];
new_job_resrcs_ptr->cpus_used[new_node_offset] +=
to_job_resrcs_ptr->cpus_used[to_node_offset];
new_job_resrcs_ptr->memory_allocated[new_node_offset]+=
to_job_resrcs_ptr->
memory_allocated[to_node_offset];
new_job_resrcs_ptr->memory_used[new_node_offset] +=
to_job_resrcs_ptr->memory_used[to_node_offset];
job_resources_bits_copy(new_job_resrcs_ptr,
new_node_offset,
to_job_resrcs_ptr,
to_node_offset);
}
to_job_ptr->total_cpus += new_job_resrcs_ptr->
cpus[new_node_offset];
}
build_job_resources_cpu_array(new_job_resrcs_ptr);
gres_stepmgr_job_merge(from_job_ptr->gres_list_req,
from_job_resrcs_ptr->node_bitmap,
to_job_ptr->gres_list_req,
to_job_resrcs_ptr->node_bitmap);
/* copy the allocated gres */
gres_stepmgr_job_merge(from_job_ptr->gres_list_alloc,
from_job_resrcs_ptr->node_bitmap,
to_job_ptr->gres_list_alloc,
to_job_resrcs_ptr->node_bitmap);
/* Now swap data: "new" -> "to" and clear "from" */
free_job_resources(&to_job_ptr->job_resrcs);
to_job_ptr->job_resrcs = new_job_resrcs_ptr;
to_job_ptr->cpu_cnt = to_job_ptr->total_cpus;
if (to_job_ptr->details) {
to_job_ptr->details->min_cpus = to_job_ptr->total_cpus;
to_job_ptr->details->max_cpus = to_job_ptr->total_cpus;
}
from_job_ptr->total_cpus = 0;
from_job_resrcs_ptr->ncpus = 0;
if (from_job_ptr->details) {
from_job_ptr->details->min_cpus = 0;
from_job_ptr->details->max_cpus = 0;
}
from_job_ptr->total_nodes = 0;
from_job_resrcs_ptr->nhosts = 0;
from_job_ptr->node_cnt = 0;
if (from_job_ptr->details)
from_job_ptr->details->min_nodes = 0;
to_job_ptr->total_nodes = new_job_resrcs_ptr->nhosts;
to_job_ptr->node_cnt = new_job_resrcs_ptr->nhosts;
bit_or(to_job_ptr->node_bitmap, from_job_ptr->node_bitmap);
bit_clear_all(from_job_ptr->node_bitmap);
bit_clear_all(from_job_resrcs_ptr->node_bitmap);
xfree(to_job_ptr->nodes);
to_job_ptr->nodes = xstrdup(new_job_resrcs_ptr->nodes);
xfree(from_job_ptr->nodes);
from_job_ptr->nodes = xstrdup("");
xfree(from_job_resrcs_ptr->nodes);
from_job_resrcs_ptr->nodes = xstrdup("");
_add_job_to_nodes(cr_ptr, to_job_ptr, "select_p_job_expand", 1);
return rc;
}
/* Decrement a partitions running and total job counts as needed to enforce the
* limit of jobs per node per partition (the partition's Shared=# parameter) */
static int _decr_node_job_cnt(int node_inx, job_record_t *job_ptr,
char *pre_err)
{
node_record_t *node_ptr = node_record_table_ptr[node_inx];
struct part_cr_record *part_cr_ptr;
bool exclusive = false, is_job_running;
if (job_ptr->details)
exclusive = (job_ptr->details->share_res == 0);
if (exclusive) {
if (cr_ptr->nodes[node_inx].exclusive_cnt)
cr_ptr->nodes[node_inx].exclusive_cnt--;
else {
error("%s: exclusive_cnt underflow for node %s",
pre_err, node_ptr->name);
}
}
is_job_running = _test_run_job(cr_ptr, job_ptr->job_id);
part_cr_ptr = cr_ptr->nodes[node_inx].parts;
while (part_cr_ptr) {
if (part_cr_ptr->part_ptr != job_ptr->part_ptr) {
part_cr_ptr = part_cr_ptr->next;
continue;
}
if (!is_job_running)
/* cancelled job already suspended */;
else if (part_cr_ptr->run_job_cnt > 0)
part_cr_ptr->run_job_cnt--;
else {
error("%s: run_job_cnt underflow for node %s",
pre_err, node_ptr->name);
}
if (part_cr_ptr->tot_job_cnt > 0)
part_cr_ptr->tot_job_cnt--;
else {
error("%s: tot_job_cnt underflow for node %s",
pre_err, node_ptr->name);
}
if ((part_cr_ptr->tot_job_cnt == 0) &&
(part_cr_ptr->run_job_cnt)) {
part_cr_ptr->run_job_cnt = 0;
error("%s: run_job_cnt out of sync for node %s",
pre_err, node_ptr->name);
}
return SLURM_SUCCESS;
}
if (job_ptr->part_ptr) {
error("%s: Could not find partition %s for node %s",
pre_err, job_ptr->part_ptr->name, node_ptr->name);
} else {
error("%s: no partition ptr given for %pJ and node %s",
pre_err, job_ptr, node_ptr->name);
}
return SLURM_ERROR;
}
/*
* deallocate resources that were assigned to this job on one node
*/
static int _rm_job_from_one_node(job_record_t *job_ptr, node_record_t *node_ptr,
char *pre_err)
{
int i, node_inx, node_offset;
job_resources_t *job_resrcs_ptr;
uint64_t job_memory = 0, job_memory_cpu = 0, job_memory_node = 0;
int first_bit;
uint16_t cpu_cnt;
list_t *node_gres_list;
bool old_job = false;
if (cr_ptr == NULL) {
error("%s: cr_ptr not initialized", pre_err);
return SLURM_ERROR;
}
if (_test_tot_job(cr_ptr, job_ptr->job_id) == 0) {
info("%s: %pJ has no resources allocated",
plugin_type, job_ptr);
return SLURM_ERROR;
}
if (job_ptr->details &&
job_ptr->details->pn_min_memory && (cr_type & SELECT_MEMORY)) {
if (job_ptr->details->pn_min_memory & MEM_PER_CPU) {
job_memory_cpu = job_ptr->details->pn_min_memory &
(~MEM_PER_CPU);
} else
job_memory_node = job_ptr->details->pn_min_memory;
}
if ((job_ptr->job_resrcs == NULL) ||
(job_ptr->job_resrcs->cpus == NULL)) {
error("%pJ lacks a job_resources struct", job_ptr);
return SLURM_ERROR;
}
job_resrcs_ptr = job_ptr->job_resrcs;
node_inx = node_ptr->index;
if (!bit_test(job_resrcs_ptr->node_bitmap, node_inx)) {
error("%pJ allocated nodes (%s) which have been removed from slurm.conf",
job_ptr, node_ptr->name);
return SLURM_ERROR;
}
first_bit = bit_ffs(job_resrcs_ptr->node_bitmap);
node_offset = -1;
for (i = first_bit; i <= node_inx; i++) {
if (!bit_test(job_resrcs_ptr->node_bitmap, i))
continue;
node_offset++;
}
if (job_resrcs_ptr->cpus[node_offset] == 0) {
error("duplicate relinquish of node %s by %pJ",
node_ptr->name, job_ptr);
return SLURM_ERROR;
}
extract_job_resources_node(job_resrcs_ptr, node_offset);
if (job_ptr->start_time < slurmctld_config.boot_time)
old_job = true;
cpu_cnt = node_ptr->config_ptr->cpus;
if (job_memory_cpu)
job_memory = job_memory_cpu * cpu_cnt;
else if (job_memory_node)
job_memory = job_memory_node;
else if (cr_type & SELECT_MEMORY)
job_memory = node_ptr->config_ptr->real_memory;
if (cr_ptr->nodes[node_inx].alloc_memory >= job_memory)
cr_ptr->nodes[node_inx].alloc_memory -= job_memory;
else {
cr_ptr->nodes[node_inx].alloc_memory = 0;
error("%s: memory underflow for node %s",
pre_err, node_ptr->name);
}
if (cr_ptr->nodes[node_inx].gres_list)
node_gres_list = cr_ptr->nodes[node_inx].gres_list;
else
node_gres_list = node_ptr->gres_list;
gres_stepmgr_job_dealloc(job_ptr->gres_list_alloc,
node_gres_list, node_offset,
job_ptr->job_id, node_ptr->name, old_job, true);
gres_node_state_log(node_gres_list, node_ptr->name);
return _decr_node_job_cnt(node_inx, job_ptr, pre_err);
}
/*
* allocate resources to the given job
*
* if alloc_all = 0: the job has been suspended, so just re-allocate CPUs
* if alloc_all = 1: allocate all resources (CPUs and memory)
*/
static int _add_job_to_nodes(struct cr_record *cr_ptr,
job_record_t *job_ptr, char *pre_err,
int alloc_all)
{
int node_cnt, node_offset, rc = SLURM_SUCCESS;
bool exclusive;
struct part_cr_record *part_cr_ptr;
job_resources_t *job_resrcs_ptr;
uint64_t job_memory_cpu = 0, job_memory_node = 0;
uint16_t cpu_cnt;
node_record_t *node_ptr;
list_t *gres_list;
bool new_alloc = true;
if (cr_ptr == NULL) {
error("%s: cr_ptr not initialized", pre_err);
return SLURM_ERROR;
}
if (alloc_all && job_ptr->details &&
job_ptr->details->pn_min_memory && (cr_type & SELECT_MEMORY)) {
if (job_ptr->details->pn_min_memory & MEM_PER_CPU) {
job_memory_cpu = job_ptr->details->pn_min_memory &
(~MEM_PER_CPU);
} else
job_memory_node = job_ptr->details->pn_min_memory;
}
if ((job_resrcs_ptr = job_ptr->job_resrcs) == NULL) {
error("%pJ lacks a job_resources struct", job_ptr);
return SLURM_ERROR;
}
exclusive = (job_ptr->details->share_res == 0);
if (alloc_all)
_add_run_job(cr_ptr, job_ptr->job_id);
_add_tot_job(cr_ptr, job_ptr->job_id);
node_cnt = bit_set_count(job_resrcs_ptr->node_bitmap);
node_offset = -1;
if (job_ptr->gres_list_alloc)
new_alloc = false;
for (int i = 0;
(node_ptr = next_node_bitmap(job_resrcs_ptr->node_bitmap, &i));
i++) {
node_offset++;
if (!bit_test(job_ptr->node_bitmap, i))
continue;
cpu_cnt = node_ptr->config_ptr->cpus;
if (job_memory_cpu) {
cr_ptr->nodes[i].alloc_memory += job_memory_cpu *
cpu_cnt;
} else if (job_memory_node) {
cr_ptr->nodes[i].alloc_memory += job_memory_node;
} else if (cr_type & SELECT_MEMORY) {
cr_ptr->nodes[i].alloc_memory +=
node_ptr->config_ptr->real_memory;
}
if (alloc_all) {
if (cr_ptr->nodes[i].gres_list)
gres_list = cr_ptr->nodes[i].gres_list;
else
gres_list = node_ptr->gres_list;
gres_stepmgr_job_alloc(job_ptr->gres_list_req,
&job_ptr->gres_list_alloc,
gres_list, node_cnt, i,
node_offset,
job_ptr->job_id, node_ptr->name,
NULL, new_alloc);
gres_node_state_log(gres_list, node_ptr->name);
}
if (exclusive)
cr_ptr->nodes[i].exclusive_cnt++;
part_cr_ptr = cr_ptr->nodes[i].parts;
while (part_cr_ptr) {
if (part_cr_ptr->part_ptr != job_ptr->part_ptr) {
part_cr_ptr = part_cr_ptr->next;
continue;
}
if (alloc_all)
part_cr_ptr->run_job_cnt++;
part_cr_ptr->tot_job_cnt++;
break;
}
if (part_cr_ptr == NULL) {
info("%s: %pJ could not find partition %s for node %s",
pre_err, job_ptr, job_ptr->partition,
node_ptr->name);
job_ptr->part_nodes_missing = true;
rc = SLURM_ERROR;
}
}
if (alloc_all) {
gres_stepmgr_job_build_details(job_ptr->gres_list_alloc,
job_ptr->nodes,
&job_ptr->gres_detail_cnt,
&job_ptr->gres_detail_str,
&job_ptr->gres_used);
}
return rc;
}
static void _free_cr(struct cr_record *cr_ptr)
{
int i;
struct part_cr_record *part_cr_ptr1, *part_cr_ptr2;
if (cr_ptr == NULL)
return;
for (i = 0; next_node(&i); i++) {
part_cr_ptr1 = cr_ptr->nodes[i].parts;
while (part_cr_ptr1) {
part_cr_ptr2 = part_cr_ptr1->next;
xfree(part_cr_ptr1);
part_cr_ptr1 = part_cr_ptr2;
}
FREE_NULL_LIST(cr_ptr->nodes[i].gres_list);
}
xfree(cr_ptr->nodes);
xfree(cr_ptr->run_job_ids);
xfree(cr_ptr->tot_job_ids);
xfree(cr_ptr);
}
static void _dump_node_cr(struct cr_record *cr_ptr)
{
#if SELECT_DEBUG
int i;
struct part_cr_record *part_cr_ptr;
node_record_t *node_ptr;
list_t *gres_list;
if ((cr_ptr == NULL) || (cr_ptr->nodes == NULL))
return;
for (i = 0; i < cr_ptr->run_job_len; i++) {
if (cr_ptr->run_job_ids[i])
info("Running JobId=%u", cr_ptr->run_job_ids[i]);
}
for (i = 0; i < cr_ptr->tot_job_len; i++) {
if (cr_ptr->tot_job_ids[i])
info("Alloc JobId=%u", cr_ptr->tot_job_ids[i]);
}
for (i = 0; (node_ptr = next_node(&i)); i++) {
info("Node:%s exclusive_cnt:%u alloc_mem:%"PRIu64"",
node_ptr->name,
cr_ptr->nodes[node_ptr->index].exclusive_cnt,
cr_ptr->nodes[node_ptr->index].alloc_memory);
part_cr_ptr = cr_ptr->nodes[node_ptr->index].parts;
while (part_cr_ptr) {
info(" Part:%s run:%u tot:%u",
part_cr_ptr->part_ptr->name,
part_cr_ptr->run_job_cnt,
part_cr_ptr->tot_job_cnt);
part_cr_ptr = part_cr_ptr->next;
}
if (cr_ptr->nodes[node_ptr->index].gres_list)
gres_list = cr_ptr->nodes[node_ptr->index].gres_list;
else
gres_list = node_ptr->gres_list;
if (gres_list)
gres_node_state_log(gres_list, node_ptr->name);
}
#endif
}
static struct cr_record *_dup_cr(struct cr_record *cr_ptr)
{
int i;
struct cr_record *new_cr_ptr;
struct part_cr_record *part_cr_ptr, *new_part_cr_ptr;
node_record_t *node_ptr;
list_t *gres_list;
if (cr_ptr == NULL)
return NULL;
new_cr_ptr = xmalloc(sizeof(struct cr_record));
new_cr_ptr->run_job_len = cr_ptr->run_job_len;
i = sizeof(uint32_t) * cr_ptr->run_job_len;
new_cr_ptr->run_job_ids = xmalloc(i);
memcpy(new_cr_ptr->run_job_ids, cr_ptr->run_job_ids, i);
new_cr_ptr->tot_job_len = cr_ptr->tot_job_len;
i = sizeof(uint32_t) * cr_ptr->tot_job_len;
new_cr_ptr->tot_job_ids = xmalloc(i);
memcpy(new_cr_ptr->tot_job_ids, cr_ptr->tot_job_ids, i);
new_cr_ptr->nodes = xcalloc(node_record_count,
sizeof(struct node_cr_record));
for (i = 0; (node_ptr = next_node(&i)); i++) {
new_cr_ptr->nodes[node_ptr->index].alloc_memory =
cr_ptr->nodes[node_ptr->index].alloc_memory;
new_cr_ptr->nodes[node_ptr->index].exclusive_cnt =
cr_ptr->nodes[node_ptr->index].exclusive_cnt;
part_cr_ptr = cr_ptr->nodes[node_ptr->index].parts;
while (part_cr_ptr) {
new_part_cr_ptr =
xmalloc(sizeof(struct part_cr_record));
new_part_cr_ptr->part_ptr = part_cr_ptr->part_ptr;
new_part_cr_ptr->run_job_cnt = part_cr_ptr->run_job_cnt;
new_part_cr_ptr->tot_job_cnt = part_cr_ptr->tot_job_cnt;
new_part_cr_ptr->next =
new_cr_ptr->nodes[node_ptr->index]. parts;
new_cr_ptr->nodes[node_ptr->index].parts =
new_part_cr_ptr;
part_cr_ptr = part_cr_ptr->next;
}
if (cr_ptr->nodes[node_ptr->index].gres_list)
gres_list = cr_ptr->nodes[node_ptr->index].gres_list;
else
gres_list = node_ptr->gres_list;
new_cr_ptr->nodes[node_ptr->index].gres_list =
gres_node_state_list_dup(gres_list);
}
return new_cr_ptr;
}
static void _init_node_cr(void)
{
part_record_t *part_ptr;
struct part_cr_record *part_cr_ptr;
job_resources_t *job_resrcs_ptr;
node_record_t *node_ptr;
list_itr_t *part_iterator;
job_record_t *job_ptr;
list_itr_t *job_iterator;
uint64_t job_memory_cpu, job_memory_node;
int exclusive, i, node_offset;
if (cr_ptr)
return;
cr_ptr = xmalloc(sizeof(struct cr_record));
cr_ptr->nodes = xcalloc(node_record_count,
sizeof(struct node_cr_record));
/* build partition records */
part_iterator = list_iterator_create(part_list);
while ((part_ptr = list_next(part_iterator))) {
if (!part_ptr->node_bitmap)
continue;
for (i = 0; next_node_bitmap(part_ptr->node_bitmap, &i); i++) {
part_cr_ptr = xmalloc(sizeof(struct part_cr_record));
part_cr_ptr->next = cr_ptr->nodes[i].parts;
part_cr_ptr->part_ptr = part_ptr;
cr_ptr->nodes[i].parts = part_cr_ptr;
}
}
list_iterator_destroy(part_iterator);
/* Clear existing node Gres allocations */
for (i = 0; (node_ptr = next_node(&i)); i++) {
gres_node_state_dealloc_all(node_ptr->gres_list);
}
/* record running and suspended jobs in node_cr_records */
job_iterator = list_iterator_create(job_list);
while ((job_ptr = list_next(job_iterator))) {
bool new_alloc = true;
if (!IS_JOB_RUNNING(job_ptr) && !IS_JOB_SUSPENDED(job_ptr))
continue;
if ((job_resrcs_ptr = job_ptr->job_resrcs) == NULL) {
error("%pJ lacks a job_resources struct",
job_ptr);
continue;
}
if (IS_JOB_RUNNING(job_ptr) ||
(IS_JOB_SUSPENDED(job_ptr) && (job_ptr->priority != 0)))
_add_run_job(cr_ptr, job_ptr->job_id);
_add_tot_job(cr_ptr, job_ptr->job_id);
job_memory_cpu = 0;
job_memory_node = 0;
if (job_ptr->details && job_ptr->details->pn_min_memory &&
(cr_type & SELECT_MEMORY)) {
if (job_ptr->details->pn_min_memory & MEM_PER_CPU) {
job_memory_cpu = job_ptr->details->
pn_min_memory &
(~MEM_PER_CPU);
} else {
job_memory_node = job_ptr->details->
pn_min_memory;
}
}
/* Use job_resrcs_ptr->node_bitmap rather than
* job_ptr->node_bitmap which can have DOWN nodes
* cleared from the bitmap */
if (job_resrcs_ptr->node_bitmap == NULL)
continue;
if (job_ptr->details)
exclusive = (job_ptr->details->share_res == 0);
else
exclusive = 0;
node_offset = -1;
if (job_ptr->gres_list_alloc)
new_alloc = false;
for (i = 0;
(node_ptr = next_node_bitmap(job_resrcs_ptr->node_bitmap,
&i));
i++) {
node_offset++;
if (!bit_test(job_ptr->node_bitmap, i))
continue; /* node already released */
if (exclusive)
cr_ptr->nodes[i].exclusive_cnt++;
if (job_memory_cpu == 0) {
if (!job_memory_node &&
(cr_type & SELECT_MEMORY))
job_memory_node = node_ptr->config_ptr->
real_memory;
cr_ptr->nodes[i].alloc_memory +=
job_memory_node;
} else {
cr_ptr->nodes[i].alloc_memory +=
job_memory_cpu *
node_record_table_ptr[i]->
config_ptr->cpus;
}
if (bit_test(job_ptr->node_bitmap, i)) {
gres_stepmgr_job_alloc(
job_ptr->gres_list_req,
&job_ptr->gres_list_alloc,
node_ptr->gres_list,
job_resrcs_ptr->nhosts,
i, node_offset,
job_ptr->job_id,
node_ptr->name,
NULL, new_alloc);
}
part_cr_ptr = cr_ptr->nodes[i].parts;
while (part_cr_ptr) {
if (part_cr_ptr->part_ptr !=
job_ptr->part_ptr) {
part_cr_ptr = part_cr_ptr->next;
continue;
}
if (IS_JOB_RUNNING(job_ptr) ||
(IS_JOB_SUSPENDED(job_ptr) &&
(job_ptr->priority != 0))) {
/* Running or being gang scheduled */
part_cr_ptr->run_job_cnt++;
}
part_cr_ptr->tot_job_cnt++;
break;
}
if (part_cr_ptr == NULL) {
info("%s: %pJ could not find partition %s for node %s",
__func__, job_ptr, job_ptr->partition,
node_ptr->name);
job_ptr->part_nodes_missing = true;
}
}
}
list_iterator_destroy(job_iterator);
_dump_node_cr(cr_ptr);
}
static int _find_job (void *x, void *key)
{
job_record_t *job_ptr = (job_record_t *) x;
if (job_ptr == (job_record_t *) key)
return 1;
return 0;
}
static bool _is_preemptable(job_record_t *job_ptr, list_t *preemptee_candidates)
{
if (!preemptee_candidates)
return false;
if (list_find_first(preemptee_candidates, _find_job, job_ptr))
return true;
return false;
}
/* Determine if a job can ever run */
static int _test_only(job_record_t *job_ptr, bitstr_t *bitmap,
uint32_t min_nodes, uint32_t max_nodes,
uint32_t req_nodes, int max_share)
{
bitstr_t *orig_map;
int i, rc = SLURM_ERROR;
uint64_t save_mem;
orig_map = bit_copy(bitmap);
/* Try to run with currently available nodes */
i = _job_count_bitmap(cr_ptr, job_ptr, orig_map, bitmap,
NO_SHARE_LIMIT, NO_SHARE_LIMIT,
SELECT_MODE_TEST_ONLY);
if (i >= min_nodes) {
save_mem = job_ptr->details->pn_min_memory;
job_ptr->details->pn_min_memory = 0;
rc = _job_test(job_ptr, bitmap, min_nodes,
max_nodes, req_nodes);
job_ptr->details->pn_min_memory = save_mem;
}
FREE_NULL_BITMAP(orig_map);
return rc;
}
/*
* Sort the usable_node element to put jobs in the correct
* preemption order.
*/
static int _sort_usable_nodes_dec(void *j1, void *j2)
{
job_record_t *job_a = *(job_record_t **)j1;
job_record_t *job_b = *(job_record_t **)j2;
if (job_a->details->usable_nodes > job_b->details->usable_nodes)
return -1;
else if (job_a->details->usable_nodes < job_b->details->usable_nodes)
return 1;
return 0;
}
/* Allocate resources for a job now, if possible */
static int _run_now(job_record_t *job_ptr, bitstr_t *bitmap,
uint32_t min_nodes, uint32_t max_nodes,
int max_share, uint32_t req_nodes,
list_t *preemptee_candidates,
list_t **preemptee_job_list)
{
bitstr_t *orig_map;
int max_run_job, j, sus_jobs, rc = EINVAL, prev_cnt = -1;
job_record_t *tmp_job_ptr;
list_itr_t *job_iterator, *preemptee_iterator;
struct cr_record *exp_cr;
uint16_t pass_count = 0;
orig_map = bit_copy(bitmap);
for (max_run_job=0; ((max_run_job<max_share) && (rc != SLURM_SUCCESS));
max_run_job++) {
bool last_iteration = (max_run_job == (max_share - 1));
for (sus_jobs=0; ((sus_jobs<5) && (rc != SLURM_SUCCESS));
sus_jobs+=4) {
if (last_iteration)
sus_jobs = NO_SHARE_LIMIT;
j = _job_count_bitmap(cr_ptr, job_ptr,
orig_map, bitmap,
max_run_job,
max_run_job + sus_jobs,
SELECT_MODE_RUN_NOW);
#if SELECT_DEBUG
{
char *node_list = bitmap2node_name(bitmap);
info("%s: %pJ iter:%d cnt:%d nodes:%s",
__func__, job_ptr, max_run_job, j,
node_list);
xfree(node_list);
}
#endif
if ((j == prev_cnt) || (j < min_nodes))
continue;
prev_cnt = j;
if (max_run_job > 0) {
/* We need to share. Try to find
* suitable job to share nodes with */
rc = _find_job_mate(job_ptr, bitmap,
min_nodes,
max_nodes, req_nodes);
if (rc == SLURM_SUCCESS)
break;
}
rc = _job_test(job_ptr, bitmap, min_nodes, max_nodes,
req_nodes);
}
}
top: if ((rc != SLURM_SUCCESS) && preemptee_candidates &&
(exp_cr = _dup_cr(cr_ptr))) {
/* Remove all preemptable jobs from simulated environment */
job_iterator = list_iterator_create(preemptee_candidates);
while ((tmp_job_ptr = list_next(job_iterator))) {
bool remove_all = false;
uint16_t mode;
if (!IS_JOB_RUNNING(tmp_job_ptr) &&
!IS_JOB_SUSPENDED(tmp_job_ptr))
continue;
mode = slurm_job_preempt_mode(tmp_job_ptr);
if ((mode == PREEMPT_MODE_REQUEUE) ||
(mode == PREEMPT_MODE_CANCEL))
remove_all = true;
/* Remove preemptable job now */
_rm_job_from_nodes(exp_cr, tmp_job_ptr, "_run_now",
remove_all, false);
j = _job_count_bitmap(exp_cr, job_ptr,
orig_map, bitmap,
(max_share - 1),
NO_SHARE_LIMIT,
SELECT_MODE_RUN_NOW);
tmp_job_ptr->details->usable_nodes =
bit_overlap(bitmap, tmp_job_ptr->node_bitmap);
if (j < min_nodes)
continue;
rc = _job_test(job_ptr, bitmap, min_nodes,
max_nodes, req_nodes);
/*
* If successful, set the last job's usable count to a
* large value so that it will be first after sorting.
* Note: usable_count is only used for sorting purposes
*/
if (rc == SLURM_SUCCESS) {
if (pass_count++ ||
(list_count(preemptee_candidates) == 1))
break;
tmp_job_ptr->details->usable_nodes = 9999;
while ((tmp_job_ptr = list_next(job_iterator))) {
tmp_job_ptr->details->usable_nodes = 0;
}
list_sort(preemptee_candidates,
(ListCmpF)_sort_usable_nodes_dec);
rc = EINVAL;
list_iterator_destroy(job_iterator);
_free_cr(exp_cr);
goto top;
}
}
list_iterator_destroy(job_iterator);
if ((rc == SLURM_SUCCESS) && preemptee_job_list &&
preemptee_candidates) {
/* Build list of preemptee jobs whose resources are
* actually used */
if (*preemptee_job_list == NULL) {
*preemptee_job_list = list_create(NULL);
}
preemptee_iterator = list_iterator_create(
preemptee_candidates);
while ((tmp_job_ptr = list_next(preemptee_iterator))) {
if (bit_overlap_any(bitmap,
tmp_job_ptr->
node_bitmap) == 0)
continue;
if (tmp_job_ptr->details->usable_nodes == 0)
continue;
list_append(*preemptee_job_list,
tmp_job_ptr);
}
list_iterator_destroy(preemptee_iterator);
}
_free_cr(exp_cr);
}
if (rc == SLURM_SUCCESS)
_build_select_struct(job_ptr, bitmap);
FREE_NULL_BITMAP(orig_map);
return rc;
}
/*
* Determine where and when the job at job_ptr can begin execution by updating
* a scratch cr_record structure to reflect each job terminating at the
* end of its time limit and use this to show where and when the job at job_ptr
* will begin execution. Used by Slurm's sched/backfill plugin.
*/
static int _will_run_test(job_record_t *job_ptr, bitstr_t *bitmap,
uint32_t min_nodes, uint32_t max_nodes,
int max_share, uint32_t req_nodes,
list_t *preemptee_candidates,
list_t **preemptee_job_list)
{
struct cr_record *exp_cr;
job_record_t *tmp_job_ptr;
list_t *cr_job_list;
list_itr_t *job_iterator, *preemptee_iterator;
bitstr_t *orig_map;
int i, max_run_jobs, rc = SLURM_ERROR;
time_t now = time(NULL);
max_run_jobs = MAX((max_share - 1), 1); /* exclude this job */
orig_map = bit_copy(bitmap);
/* Try to run with currently available nodes */
i = _job_count_bitmap(cr_ptr, job_ptr, orig_map, bitmap,
max_run_jobs, NO_SHARE_LIMIT,
SELECT_MODE_WILL_RUN);
if (i >= min_nodes) {
rc = _job_test(job_ptr, bitmap, min_nodes, max_nodes,
req_nodes);
if (rc == SLURM_SUCCESS) {
FREE_NULL_BITMAP(orig_map);
job_ptr->start_time = time(NULL);
return SLURM_SUCCESS;
}
}
/* Job is still pending. Simulate termination of jobs one at a time
* to determine when and where the job can start. */
exp_cr = _dup_cr(cr_ptr);
if (exp_cr == NULL) {
FREE_NULL_BITMAP(orig_map);
return SLURM_ERROR;
}
/* Build list of running and suspended jobs */
cr_job_list = list_create(NULL);
job_iterator = list_iterator_create(job_list);
while ((tmp_job_ptr = list_next(job_iterator))) {
if (!IS_JOB_RUNNING(tmp_job_ptr) &&
!IS_JOB_SUSPENDED(tmp_job_ptr))
continue;
if (tmp_job_ptr->end_time == 0) {
error("%s: Active %pJ has zero end_time",
__func__, tmp_job_ptr);
continue;
}
if (tmp_job_ptr->node_bitmap == NULL) {
error("%s: %pJ has NULL node_bitmap",
__func__, tmp_job_ptr);
continue;
}
if (!_is_preemptable(tmp_job_ptr, preemptee_candidates)) {
/* Queue job for later removal from data structures */
list_append(cr_job_list, tmp_job_ptr);
} else {
uint16_t mode = slurm_job_preempt_mode(tmp_job_ptr);
bool remove_all = false;
if ((mode == PREEMPT_MODE_REQUEUE) ||
(mode == PREEMPT_MODE_CANCEL))
remove_all = true;
/* Remove preemptable job now */
_rm_job_from_nodes(exp_cr, tmp_job_ptr,
"_will_run_test", remove_all, false);
}
}
list_iterator_destroy(job_iterator);
/* Test with all preemptable jobs gone */
if (preemptee_candidates) {
i = _job_count_bitmap(exp_cr, job_ptr, orig_map, bitmap,
max_run_jobs, NO_SHARE_LIMIT,
SELECT_MODE_RUN_NOW);
if (i >= min_nodes) {
rc = _job_test(job_ptr, bitmap, min_nodes, max_nodes,
req_nodes);
if (rc == SLURM_SUCCESS) {
/* Actual start time will actually be later
* than "now", but return "now" for backfill
* scheduler to initiate preemption. */
job_ptr->start_time = now;
}
}
}
/* Remove the running jobs one at a time from exp_node_cr and try
* scheduling the pending job after each one */
if ((rc != SLURM_SUCCESS) &&
((job_ptr->bit_flags & TEST_NOW_ONLY) == 0)) {
list_sort(cr_job_list, _cr_job_list_sort);
job_iterator = list_iterator_create(cr_job_list);
while ((tmp_job_ptr = list_next(job_iterator))) {
_rm_job_from_nodes(exp_cr, tmp_job_ptr,
"_will_run_test", true, false);
i = _job_count_bitmap(exp_cr, job_ptr, orig_map,
bitmap, max_run_jobs,
NO_SHARE_LIMIT,
SELECT_MODE_RUN_NOW);
if (i < min_nodes)
continue;
rc = _job_test(job_ptr, bitmap, min_nodes, max_nodes,
req_nodes);
if (rc != SLURM_SUCCESS)
continue;
if (tmp_job_ptr->end_time <= now)
job_ptr->start_time = now + 1;
else
job_ptr->start_time = tmp_job_ptr->end_time;
break;
}
list_iterator_destroy(job_iterator);
}
if ((rc == SLURM_SUCCESS) && preemptee_job_list &&
preemptee_candidates) {
/* Build list of preemptee jobs whose resources are
* actually used. list returned even if not killed
* in selected plugin, but by Moab or something else. */
if (*preemptee_job_list == NULL) {
*preemptee_job_list = list_create(NULL);
}
preemptee_iterator =list_iterator_create(preemptee_candidates);
while ((tmp_job_ptr = list_next(preemptee_iterator))) {
if (bit_overlap_any(bitmap,
tmp_job_ptr->node_bitmap) == 0)
continue;
list_append(*preemptee_job_list, tmp_job_ptr);
}
list_iterator_destroy(preemptee_iterator);
}
FREE_NULL_LIST(cr_job_list);
_free_cr(exp_cr);
FREE_NULL_BITMAP(orig_map);
return rc;
}
static int _cr_job_list_sort(void *x, void *y)
{
job_record_t *job1_ptr = *(job_record_t **) x;
job_record_t *job2_ptr = *(job_record_t **) y;
return slurm_sort_time_list_asc(&job1_ptr->end_time,
&job2_ptr->end_time);
}
extern int init(void)
{
int rc = SLURM_SUCCESS;
cr_type = slurm_conf.select_type_param;
if (cr_type)
verbose("%s loaded with argument %u", plugin_name, cr_type);
return rc;
}
extern void fini(void)
{
cr_fini_global_core_data();
slurm_mutex_lock(&cr_mutex);
_free_cr(cr_ptr);
cr_ptr = NULL;
slurm_mutex_unlock(&cr_mutex);
}
/*
* The remainder of this file implements the standard Slurm
* node selection API.
*/
extern int select_p_node_init(void)
{
/* NOTE: We free the consumable resources info here, but
* can't rebuild it since the partition and node structures
* have not yet had node bitmaps reset. */
slurm_mutex_lock(&cr_mutex);
_free_cr(cr_ptr);
cr_ptr = NULL;
cr_init_global_core_data(node_record_table_ptr, node_record_count);
slurm_mutex_unlock(&cr_mutex);
return SLURM_SUCCESS;
}
/*
* select_p_job_test - Given a specification of scheduling requirements,
* identify the nodes which "best" satisfy the request.
* "best" is defined as either single set of consecutive nodes satisfying
* the request and leaving the minimum number of unused nodes OR
* the fewest number of consecutive node sets
* IN/OUT job_ptr - pointer to job being considered for initiation,
* set's start_time when job expected to start
* IN/OUT bitmap - usable nodes are set on input, nodes not required to
* satisfy the request are cleared, other left set
* IN min_nodes - minimum count of nodes
* IN req_nodes - requested (or desired) count of nodes
* IN max_nodes - maximum count of nodes
* IN mode - SELECT_MODE_RUN_NOW: try to schedule job now
* SELECT_MODE_TEST_ONLY: test if job can ever run
* SELECT_MODE_WILL_RUN: determine when and where job can run
* IN preemptee_candidates - list of pointers to jobs which can be preempted.
* IN/OUT preemptee_job_list - Pointer to list of job pointers. These are the
* jobs to be preempted to initiate the pending job. Not set
* if mode=SELECT_MODE_TEST_ONLY or input pointer is NULL.
* IN resv_exc_ptr - Various TRES which the job can NOT use.
* IN will_run_ptr - Pointer to data specific to WILL_RUN mode
* RET SLURM_SUCCESS on success, rc otherwise
* globals (passed via select_p_node_init):
* node_record_count - count of nodes configured
* node_record_table_ptr - pointer to global node table
* NOTE: the job information that is considered for scheduling includes:
* req_node_bitmap: bitmap of specific nodes required by the job
* contiguous: allocated nodes must be sequentially located
* num_cpus: minimum number of processors required by the job
* NOTE: bitmap must be a superset of the job's required at the time that
* select_p_job_test is called
*/
extern int select_p_job_test(job_record_t *job_ptr, bitstr_t *bitmap,
uint32_t min_nodes, uint32_t max_nodes,
uint32_t req_nodes, uint16_t mode,
list_t *preemptee_candidates,
list_t **preemptee_job_list,
resv_exc_t *resv_exc_ptr,
will_run_data_t *will_run_ptr)
{
int max_share = 0, rc = EINVAL, license_rc;
xassert(bitmap);
if (job_ptr->details == NULL)
return EINVAL;
slurm_mutex_lock(&cr_mutex);
if (cr_ptr == NULL) {
_init_node_cr();
if (cr_ptr == NULL) {
slurm_mutex_unlock(&cr_mutex);
error("select_p_job_test: cr_ptr not initialized");
return SLURM_ERROR;
}
}
if (bit_set_count(bitmap) < min_nodes) {
slurm_mutex_unlock(&cr_mutex);
return EINVAL;
}
if (job_ptr->details->core_spec != NO_VAL16) {
verbose("%s: %pJ core_spec(%u) not supported",
plugin_type, job_ptr, job_ptr->details->core_spec);
job_ptr->details->core_spec = NO_VAL16;
}
license_rc = license_job_test(job_ptr, time(NULL), true);
if (license_rc != SLURM_SUCCESS) {
slurm_mutex_unlock(&cr_mutex);
if (license_rc == SLURM_ERROR) {
log_flag(SELECT_TYPE,
"test fail: insufficient licenses configured");
return ESLURM_LICENSES_UNAVAILABLE;
}
if ((mode != SELECT_MODE_TEST_ONLY) && (license_rc == EAGAIN)) {
log_flag(SELECT_TYPE,
"test fail: insufficient licenses available");
return ESLURM_LICENSES_UNAVAILABLE;
}
}
if (job_ptr->details->share_res)
max_share = job_ptr->part_ptr->max_share & ~SHARED_FORCE;
else /* ((shared == 0) || (shared == NO_VAL16)) */
max_share = 1;
if (mode == SELECT_MODE_WILL_RUN) {
rc = _will_run_test(job_ptr, bitmap, min_nodes, max_nodes,
max_share, req_nodes,
preemptee_candidates, preemptee_job_list);
if (!job_ptr->best_switch)
rc = SLURM_ERROR;
} else if (mode == SELECT_MODE_TEST_ONLY) {
rc = _test_only(job_ptr, bitmap, min_nodes, max_nodes,
req_nodes, max_share);
} else if (mode == SELECT_MODE_RUN_NOW) {
rc = _run_now(job_ptr, bitmap, min_nodes, max_nodes,
max_share, req_nodes,
preemptee_candidates, preemptee_job_list);
if (!job_ptr->best_switch)
rc = SLURM_ERROR;
} else
fatal("select_p_job_test: Mode %d is invalid", mode);
slurm_mutex_unlock(&cr_mutex);
return rc;
}
/*
* Note initiation of job is about to begin. Called immediately
* after select_p_job_test(). Executed from slurmctld.
* IN job_ptr - pointer to job being initiated
*/
extern int select_p_job_begin(job_record_t *job_ptr)
{
int rc = SLURM_SUCCESS;
slurm_mutex_lock(&cr_mutex);
if (cr_ptr == NULL)
_init_node_cr();
if (rc == SLURM_SUCCESS)
rc = _add_job_to_nodes(cr_ptr, job_ptr, "select_p_job_begin", 1);
gres_job_state_log(job_ptr->gres_list_req, job_ptr->job_id);
if ((slurm_conf.debug_flags & DEBUG_FLAG_GRES) &&
job_ptr->gres_list_alloc)
info("Alloc GRES");
gres_job_state_log(job_ptr->gres_list_alloc, job_ptr->job_id);
slurm_mutex_unlock(&cr_mutex);
return rc;
}
/*
* Determine if allocated nodes are usable (powered up)
* IN job_ptr - pointer to job being tested
* RET -1 on error, 1 if ready to execute, 0 otherwise
*/
extern int select_p_job_ready(job_record_t *job_ptr)
{
node_record_t *node_ptr;
if (!IS_JOB_RUNNING(job_ptr) && !IS_JOB_SUSPENDED(job_ptr)) {
/* Gang scheduling might suspend job immediately */
return 0;
}
if (!job_ptr->node_bitmap)
return READY_NODE_STATE;
for (int i = 0; (node_ptr = next_node_bitmap(job_ptr->node_bitmap, &i));
i++) {
if (IS_NODE_POWERED_DOWN(node_ptr) ||
IS_NODE_POWERING_UP(node_ptr))
return 0;
}
return READY_NODE_STATE;
}
extern int select_p_job_expand(job_record_t *from_job_ptr,
job_record_t *to_job_ptr)
{
int rc;
slurm_mutex_lock(&cr_mutex);
if (cr_ptr == NULL)
_init_node_cr();
rc = _job_expand(from_job_ptr, to_job_ptr);
slurm_mutex_unlock(&cr_mutex);
return rc;
}
/*
* Modify internal data structures for a job that has changed size
* Only support jobs shrinking now.
* RET: 0 or an error code
*/
extern int select_p_job_resized(job_record_t *job_ptr, node_record_t *node_ptr)
{
int rc = SLURM_SUCCESS;
slurm_mutex_lock(&cr_mutex);
if (cr_ptr == NULL)
_init_node_cr();
_rm_job_from_one_node(job_ptr, node_ptr, "select_p_job_resized");
slurm_mutex_unlock(&cr_mutex);
return rc;
}
/*
* Note termination of job is starting. Executed from slurmctld.
* IN job_ptr - pointer to job being terminated
*/
extern int select_p_job_fini(job_record_t *job_ptr)
{
int rc = SLURM_SUCCESS;
slurm_mutex_lock(&cr_mutex);
if (cr_ptr == NULL)
_init_node_cr();
if (_rm_job_from_nodes(cr_ptr, job_ptr, "select_p_job_fini", true,
true) != SLURM_SUCCESS)
rc = SLURM_ERROR;
slurm_mutex_unlock(&cr_mutex);
return rc;
}
/*
* Suspend a job. Executed from slurmctld.
* IN job_ptr - pointer to job being suspended
* IN indf_susp - set if job is being suspended indefinitely by user
* or admin, otherwise suspended for gang scheduling
* RET SLURM_SUCCESS or error code
*/
extern int select_p_job_suspend(job_record_t *job_ptr, bool indf_susp)
{
int rc;
if (!indf_susp)
return SLURM_SUCCESS;
slurm_mutex_lock(&cr_mutex);
if (cr_ptr == NULL)
_init_node_cr();
rc = _rm_job_from_nodes(cr_ptr, job_ptr, "select_p_job_suspend", false,
false);
slurm_mutex_unlock(&cr_mutex);
return rc;
}
/*
* Resume a job. Executed from slurmctld.
* IN job_ptr - pointer to job being resumed
* IN indf_susp - set if job is being resumed from indefinite suspend by user
* or admin, otherwise resume from gang scheduling
* RET SLURM_SUCCESS or error code
*/
extern int select_p_job_resume(job_record_t *job_ptr, bool indf_susp)
{
int rc;
if (!indf_susp)
return SLURM_SUCCESS;
slurm_mutex_lock(&cr_mutex);
if (cr_ptr == NULL)
_init_node_cr();
rc = _add_job_to_nodes(cr_ptr, job_ptr, "select_p_job_resume", 0);
slurm_mutex_unlock(&cr_mutex);
return rc;
}
extern int select_p_select_nodeinfo_set_all(void)
{
node_record_t *node_ptr = NULL;
int n;
static time_t last_set_all = 0;
/* only set this once when the last_node_update is newer than
* the last time we set things up. */
if (last_set_all && (last_node_update < last_set_all)) {
debug2("Node select info for set all hasn't "
"changed since %ld",
(long)last_set_all);
return SLURM_NO_CHANGE_IN_DATA;
}
last_set_all = last_node_update;
for (n = 0; (node_ptr = next_node(&n)); n++) {
xfree(node_ptr->alloc_tres_fmt_str);
if (IS_NODE_COMPLETING(node_ptr) || IS_NODE_ALLOCATED(node_ptr)) {
node_ptr->alloc_cpus = node_ptr->config_ptr->cpus;
node_ptr->alloc_tres_fmt_str =
assoc_mgr_make_tres_str_from_array(
node_ptr->tres_cnt,
TRES_STR_CONVERT_UNITS, false);
} else {
node_ptr->alloc_cpus = 0;
}
if (cr_ptr && cr_ptr->nodes) {
node_ptr->alloc_memory =
cr_ptr->nodes[node_ptr->index].alloc_memory;
} else {
node_ptr->alloc_memory = 0;
}
}
return SLURM_SUCCESS;
}
extern int select_p_select_nodeinfo_set(job_record_t *job_ptr)
{
xassert(job_ptr);
slurm_mutex_lock(&cr_mutex);
if (cr_ptr == NULL)
_init_node_cr();
slurm_mutex_unlock(&cr_mutex);
return SLURM_SUCCESS;
}
extern int select_p_reconfigure(void)
{
slurm_mutex_lock(&cr_mutex);
_free_cr(cr_ptr);
cr_ptr = NULL;
_init_node_cr();
slurm_mutex_unlock(&cr_mutex);
return SLURM_SUCCESS;
}