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third-party-mirror / SchedMD / slurm / 951427ba709f7082124e31bb6d41b79d9219bcd4 / . / src / plugins / task / affinity / dist_tasks.c
blob: 92db43a03d294b842663898b85b22ef48bda9490 [file] [log] [blame]
/*****************************************************************************\
* Copyright (C) 2006-2009 Hewlett-Packard Development Company, L.P.
* Copyright (C) 2008-2009 Lawrence Livermore National Security.
* Written by Susanne M. Balle, <susanne.balle@hp.com>
* 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.
\*****************************************************************************/
#define _GNU_SOURCE
#include "affinity.h"
#include "dist_tasks.h"
#include "src/common/bitstring.h"
#include "src/common/log.h"
#include "src/interfaces/cred.h"
#include "src/common/slurm_protocol_api.h"
#include "src/common/slurm_resource_info.h"
#include "src/common/strlcpy.h"
#include "src/common/xmalloc.h"
#include "src/slurmd/slurmd/slurmd.h"
#ifdef HAVE_NUMA
#include <numa.h>
#endif
static char *_alloc_mask(launch_tasks_request_msg_t *req,
int *whole_node_cnt, int *whole_socket_cnt,
int *whole_core_cnt, int *whole_thread_cnt,
int *part_socket_cnt, int *part_core_cnt);
static bitstr_t *_get_avail_map(slurm_cred_t *cred, uint16_t *hw_sockets,
uint16_t *hw_cores, uint16_t *hw_threads);
static int _get_local_node_info(slurm_cred_arg_t *arg, int job_node_id,
uint16_t *sockets, uint16_t *cores);
static int _task_layout_lllp_block(launch_tasks_request_msg_t *req,
uint32_t node_id, bitstr_t ***masks_p);
static int _task_layout_lllp_cyclic(launch_tasks_request_msg_t *req,
uint32_t node_id, bitstr_t ***masks_p);
static void _lllp_map_abstract_masks(const uint32_t maxtasks,
bitstr_t **masks);
static void _lllp_generate_cpu_bind(launch_tasks_request_msg_t *req,
const uint32_t maxtasks,
bitstr_t **masks);
/* BLOCK_MAP physical machine LLLP index to abstract block LLLP index
* BLOCK_MAP_INV physical abstract block LLLP index to machine LLLP index
*/
#define BLOCK_MAP(index) _block_map(index, conf->block_map)
#define BLOCK_MAP_INV(index) _block_map(index, conf->block_map_inv)
/* _block_map
*
* safely returns a mapped index using a provided block map
*
* IN - index to map
* IN - map to use
*/
static uint16_t _block_map(uint16_t index, uint16_t *map)
{
if (map == NULL) {
return index;
}
/* make sure bit falls in map */
if (index >= conf->block_map_size) {
debug3("wrapping index %u into block_map_size of %u",
index, conf->block_map_size);
index = index % conf->block_map_size;
}
index = map[index];
return(index);
}
static void _task_layout_display_masks(launch_tasks_request_msg_t *req,
const uint32_t *gtid,
const uint32_t maxtasks,
bitstr_t **masks)
{
int i;
char *str = NULL;
for(i = 0; i < maxtasks; i++) {
str = (char *)bit_fmt_hexmask(masks[i]);
debug3("_task_layout_display_masks jobid [%u:%d] %s",
req->step_id.job_id, gtid[i], str);
xfree(str);
}
}
static void _lllp_free_masks(const uint32_t maxtasks, bitstr_t **masks)
{
int i;
bitstr_t *bitmask;
for (i = 0; i < maxtasks; i++) {
bitmask = masks[i];
FREE_NULL_BITMAP(bitmask);
}
xfree(masks);
}
#ifdef HAVE_NUMA
/* _match_mask_to_ldom
*
* expand each mask to encompass the whole locality domain
* within which it currently exists
* NOTE: this assumes that the masks are already in logical
* (and not abstract) CPU order.
*/
static void _match_masks_to_ldom(const uint32_t maxtasks, bitstr_t **masks)
{
uint32_t i, b, size;
if (!masks || !masks[0])
return;
size = bit_size(masks[0]);
for(i = 0; i < maxtasks; i++) {
for (b = 0; b < size; b++) {
if (bit_test(masks[i], b)) {
/* get the NUMA node for this CPU, and then
* set all CPUs in the mask that exist in
* the same CPU */
int c;
uint16_t nnid = slurm_get_numa_node(b);
for (c = 0; c < size; c++) {
if (slurm_get_numa_node(c) == nnid)
bit_set(masks[i], c);
}
}
}
}
}
#endif
/*
* batch_bind - Set the batch request message so as to bind the shell to the
* proper resources
*/
void batch_bind(batch_job_launch_msg_t *req)
{
bitstr_t *hw_map;
int task_cnt = 0;
uint16_t sockets = 0, cores = 0, threads = 0;
hw_map = _get_avail_map(req->cred, &sockets, &cores, &threads);
if (hw_map)
task_cnt = bit_set_count(hw_map);
if (task_cnt) {
req->cpu_bind_type = CPU_BIND_MASK;
if (slurm_conf.task_plugin_param & CPU_BIND_VERBOSE)
req->cpu_bind_type |= CPU_BIND_VERBOSE;
xfree(req->cpu_bind);
req->cpu_bind = (char *)bit_fmt_hexmask(hw_map);
info("job %u CPU input mask for node: %s",
req->job_id, req->cpu_bind);
/* translate abstract masks to actual hardware layout */
_lllp_map_abstract_masks(1, &hw_map);
#ifdef HAVE_NUMA
if (req->cpu_bind_type & CPU_BIND_TO_LDOMS) {
_match_masks_to_ldom(1, &hw_map);
}
#endif
xfree(req->cpu_bind);
req->cpu_bind = (char *)bit_fmt_hexmask(hw_map);
info("job %u CPU final HW mask for node: %s",
req->job_id, req->cpu_bind);
} else {
error("job %u allocated no CPUs",
req->job_id);
}
FREE_NULL_BITMAP(hw_map);
}
static int _validate_map(launch_tasks_request_msg_t *req, char *avail_mask,
char **err_msg)
{
char *tmp_map, *save_ptr = NULL, *tok;
cpu_set_t avail_cpus;
bool superset = true;
int rc = SLURM_SUCCESS;
if (!req->cpu_bind) {
char *err = "No list of CPU IDs provided to --cpu-bind=map_cpu:<list>";
error("%s", err);
if (err_msg)
xstrfmtcat(*err_msg, "%s", err);
return ESLURMD_CPU_BIND_ERROR;
}
CPU_ZERO(&avail_cpus);
if (task_str_to_cpuset(&avail_cpus, avail_mask)) {
char *err = "Failed to convert avail_mask into hex for CPU bind map";
error("%s", err);
if (err_msg)
xstrfmtcat(*err_msg, "%s", err);
return ESLURMD_CPU_BIND_ERROR;
}
tmp_map = xstrdup(req->cpu_bind);
tok = strtok_r(tmp_map, ",", &save_ptr);
while (tok) {
int i = atoi(tok);
if (!CPU_ISSET(i, &avail_cpus)) {
/* The task's CPU map is completely invalid.
* Disable CPU map. */
superset = false;
break;
}
tok = strtok_r(NULL, ",", &save_ptr);
}
xfree(tmp_map);
if (!superset) {
error("CPU binding outside of job step allocation, allocated CPUs are: %s.",
avail_mask);
if (err_msg)
xstrfmtcat(*err_msg, "CPU binding outside of job step allocation, allocated CPUs are: %s.",
avail_mask);
rc = ESLURMD_CPU_BIND_ERROR;
}
return rc;
}
static int _validate_mask(launch_tasks_request_msg_t *req, char *avail_mask,
char **err_msg)
{
char *new_mask = NULL, *save_ptr = NULL, *tok;
cpu_set_t avail_cpus, task_cpus;
bool superset = true;
int rc = SLURM_SUCCESS;
if (!req->cpu_bind) {
char *err = "No list of CPU masks provided to --cpu-bind=mask_cpu:<list>";
error("%s", err);
if (err_msg)
xstrfmtcat(*err_msg, "%s", err);
return ESLURMD_CPU_BIND_ERROR;
}
CPU_ZERO(&avail_cpus);
if (task_str_to_cpuset(&avail_cpus, avail_mask)) {
char *err = "Failed to convert avail_mask into hex for CPU bind mask";
error("%s", err);
if (err_msg)
xstrfmtcat(*err_msg, "%s", err);
return ESLURMD_CPU_BIND_ERROR;
}
tok = strtok_r(req->cpu_bind, ",", &save_ptr);
while (tok) {
int i, overlaps = 0;
char mask_str[CPU_SET_HEX_STR_SIZE];
CPU_ZERO(&task_cpus);
if (task_str_to_cpuset(&task_cpus, tok)) {
char *err = "Failed to convert cpu bind string into hex for CPU bind mask";
error("%s", err);
if (err_msg)
xstrfmtcat(*err_msg, "%s", err);
xfree(new_mask);
return ESLURMD_CPU_BIND_ERROR;
}
for (i = 0; i < CPU_SETSIZE; i++) {
if (!CPU_ISSET(i, &task_cpus))
continue;
if (CPU_ISSET(i, &avail_cpus)) {
overlaps++;
} else {
CPU_CLR(i, &task_cpus);
superset = false;
}
}
if (overlaps == 0) {
/* The task's CPU mask is completely invalid.
* Give it all allowed CPUs. */
for (i = 0; i < CPU_SETSIZE; i++) {
if (CPU_ISSET(i, &avail_cpus))
CPU_SET(i, &task_cpus);
}
}
task_cpuset_to_str(&task_cpus, mask_str);
if (new_mask)
xstrcat(new_mask, ",");
xstrcat(new_mask, mask_str);
tok = strtok_r(NULL, ",", &save_ptr);
}
if (!superset) {
error("CPU binding outside of job step allocation, allocated CPUs are: %s.",
avail_mask);
if (err_msg)
xstrfmtcat(*err_msg, "CPU binding outside of job step allocation, allocated CPUs are: %s.",
avail_mask);
rc = ESLURMD_CPU_BIND_ERROR;
}
xfree(req->cpu_bind);
req->cpu_bind = new_mask;
return rc;
}
/*
* lllp_distribution
*
* Note: lllp stands for Lowest Level of Logical Processors.
*
* When automatic binding is enabled:
* - no binding flags set >= CPU_BIND_NONE, and
* - a auto binding level selected CPU_BIND_TO_{SOCKETS,CORES,THREADS}
* Otherwise limit job step to the allocated CPUs
*
* generate the appropriate cpu_bind type and string which results in
* the specified lllp distribution.
*
* IN/OUT req - job launch request (cpu_bind_type and cpu_bind updated)
* IN node_id - global task id array
* OUT err_msg - optional string to pass out error message.
*/
extern int lllp_distribution(launch_tasks_request_msg_t *req, uint32_t node_id,
char **err_msg)
{
int rc = SLURM_SUCCESS;
bitstr_t **masks = NULL;
char buf_type[100];
int maxtasks = req->tasks_to_launch[node_id];
int whole_nodes, whole_sockets, whole_cores, whole_threads;
int part_sockets, part_cores;
const uint32_t *gtid = req->global_task_ids[node_id];
static uint16_t bind_entity =
CPU_BIND_TO_THREADS | CPU_BIND_TO_CORES |
CPU_BIND_TO_SOCKETS | CPU_BIND_TO_LDOMS;
static uint16_t bind_mode =
CPU_BIND_NONE | CPU_BIND_MASK |
CPU_BIND_MAP |
CPU_BIND_LDMASK | CPU_BIND_LDRANK |
CPU_BIND_LDMAP;
static int only_one_thread_per_core = -1;
if (only_one_thread_per_core == -1) {
if (conf->cpus == (conf->sockets * conf->cores))
only_one_thread_per_core = 1;
else
only_one_thread_per_core = 0;
}
/*
* If we are telling the system we only want to use 1 thread
* per core with the CPUs node option this is the easiest way
* to portray that to the affinity plugin.
*/
if (only_one_thread_per_core)
req->cpu_bind_type |= CPU_BIND_ONE_THREAD_PER_CORE;
if (req->cpu_bind_type & bind_mode) {
/* Explicit step binding specified by user */
char *avail_mask = _alloc_mask(req,
&whole_nodes, &whole_sockets,
&whole_cores, &whole_threads,
&part_sockets, &part_cores);
if (!avail_mask) {
error("Could not determine allocated CPUs");
if (err_msg)
xstrfmtcat(*err_msg, "Could not determine allocated CPUs");
rc = ESLURMD_CPU_BIND_ERROR;
} else if ((whole_nodes == 0) &&
(req->job_core_spec == NO_VAL16) &&
(!(req->cpu_bind_type & CPU_BIND_MAP)) &&
(!(req->cpu_bind_type & CPU_BIND_MASK))) {
if (!(req->cpu_bind_type & CPU_BIND_NONE)) {
rc = ESLURMD_CPU_BIND_ERROR;
slurm_sprint_cpu_bind_type(buf_type,
req->cpu_bind_type);
error("Entire node must be allocated for %s",
buf_type);
if (err_msg)
xstrfmtcat(*err_msg, "Entire node must be allocated for %s",
buf_type);
}
xfree(req->cpu_bind);
req->cpu_bind = avail_mask;
req->cpu_bind_type &= (~bind_mode);
req->cpu_bind_type |= CPU_BIND_MASK;
} else {
if (req->job_core_spec == NO_VAL16) {
if (req->cpu_bind_type & CPU_BIND_MASK)
rc = _validate_mask(req, avail_mask,
err_msg);
else if (req->cpu_bind_type & CPU_BIND_MAP)
rc = _validate_map(req, avail_mask,
err_msg);
}
xfree(avail_mask);
}
slurm_sprint_cpu_bind_type(buf_type, req->cpu_bind_type);
info("JobId=%u manual binding: %s",
req->step_id.job_id, buf_type);
return rc;
}
if (!(req->cpu_bind_type & bind_entity)) {
/*
* No bind unit (sockets, cores) specified by user,
* pick something reasonable
*/
bool auto_def_set = false;
int spec_thread_cnt = 0;
int max_tasks = req->tasks_to_launch[node_id] *
req->cpus_per_task;
char *avail_mask = _alloc_mask(req,
&whole_nodes, &whole_sockets,
&whole_cores, &whole_threads,
&part_sockets, &part_cores);
debug("binding tasks:%d to nodes:%d sockets:%d:%d cores:%d:%d threads:%d",
max_tasks, whole_nodes, whole_sockets,
part_sockets, whole_cores, part_cores, whole_threads);
if ((req->job_core_spec != NO_VAL16) &&
(req->job_core_spec & CORE_SPEC_THREAD) &&
(req->job_core_spec != CORE_SPEC_THREAD)) {
spec_thread_cnt = req->job_core_spec &
(~CORE_SPEC_THREAD);
}
if (((max_tasks == whole_sockets) && (part_sockets == 0)) ||
(spec_thread_cnt &&
(max_tasks == (whole_sockets + part_sockets)))) {
req->cpu_bind_type |= CPU_BIND_TO_SOCKETS;
goto make_auto;
}
if (((max_tasks == whole_cores) && (part_cores == 0)) ||
(spec_thread_cnt &&
(max_tasks == (whole_cores + part_cores)))) {
req->cpu_bind_type |= CPU_BIND_TO_CORES;
goto make_auto;
}
if (max_tasks == whole_threads) {
req->cpu_bind_type |= CPU_BIND_TO_THREADS;
goto make_auto;
}
if (slurm_conf.task_plugin_param & CPU_AUTO_BIND_TO_THREADS) {
auto_def_set = true;
req->cpu_bind_type |= CPU_BIND_TO_THREADS;
goto make_auto;
} else if (slurm_conf.task_plugin_param &
CPU_AUTO_BIND_TO_CORES) {
auto_def_set = true;
req->cpu_bind_type |= CPU_BIND_TO_CORES;
goto make_auto;
} else if (slurm_conf.task_plugin_param &
CPU_AUTO_BIND_TO_SOCKETS) {
auto_def_set = true;
req->cpu_bind_type |= CPU_BIND_TO_SOCKETS;
goto make_auto;
}
if (avail_mask) {
xfree(req->cpu_bind);
req->cpu_bind = avail_mask;
req->cpu_bind_type |= CPU_BIND_MASK;
}
slurm_sprint_cpu_bind_type(buf_type, req->cpu_bind_type);
info("JobId=%u auto binding off: %s",
req->step_id.job_id, buf_type);
return rc;
make_auto: xfree(avail_mask);
slurm_sprint_cpu_bind_type(buf_type, req->cpu_bind_type);
info("JobId=%u %s auto binding: %s, dist %d",
req->step_id.job_id,
(auto_def_set) ? "default" : "implicit",
buf_type, req->task_dist);
} else {
/* Explicit bind unit (sockets, cores) specified by user */
slurm_sprint_cpu_bind_type(buf_type, req->cpu_bind_type);
info("JobId=%u binding: %s, dist %d",
req->step_id.job_id, buf_type, req->task_dist);
}
switch (req->task_dist & SLURM_DIST_NODESOCKMASK) {
case SLURM_DIST_BLOCK_BLOCK:
case SLURM_DIST_CYCLIC_BLOCK:
case SLURM_DIST_PLANE:
debug2("JobId=%u will use lllp_block",
req->step_id.job_id);
/* tasks are distributed in blocks within a plane */
rc = _task_layout_lllp_block(req, node_id, &masks);
break;
case SLURM_DIST_ARBITRARY:
case SLURM_DIST_BLOCK:
case SLURM_DIST_CYCLIC:
case SLURM_DIST_UNKNOWN:
if (slurm_conf.select_type_param &
SELECT_CORE_DEFAULT_DIST_BLOCK) {
debug2("JobId=%u will use lllp_block because of SelectTypeParameters",
req->step_id.job_id);
rc = _task_layout_lllp_block(req, node_id, &masks);
break;
}
/*
* We want to fall through here if we aren't doing a
* default dist block.
*/
default:
debug2("JobId=%u will use lllp_cyclic because of SelectTypeParameters",
req->step_id.job_id);
rc = _task_layout_lllp_cyclic(req, node_id, &masks);
break;
}
/*
* FIXME: I'm worried about core_bitmap with CPU_BIND_TO_SOCKETS &
* max_cores - does select/cons_tres plugin allocate whole
* socket??? Maybe not. Check srun man page.
*/
if (rc == SLURM_SUCCESS) {
_task_layout_display_masks(req, gtid, maxtasks, masks);
/* translate abstract masks to actual hardware layout */
_lllp_map_abstract_masks(maxtasks, masks);
_task_layout_display_masks(req, gtid, maxtasks, masks);
#ifdef HAVE_NUMA
if (req->cpu_bind_type & CPU_BIND_TO_LDOMS) {
_match_masks_to_ldom(maxtasks, masks);
_task_layout_display_masks(req, gtid, maxtasks, masks);
}
#endif
/* convert masks into cpu_bind mask string */
_lllp_generate_cpu_bind(req, maxtasks, masks);
} else {
char *avail_mask = _alloc_mask(req,
&whole_nodes, &whole_sockets,
&whole_cores, &whole_threads,
&part_sockets, &part_cores);
if (avail_mask) {
xfree(req->cpu_bind);
req->cpu_bind = avail_mask;
req->cpu_bind_type &= (~bind_mode);
req->cpu_bind_type |= CPU_BIND_MASK;
}
if (req->flags & LAUNCH_OVERCOMMIT) {
/*
* Allow the step to run despite not being able to
* distribute tasks.
* e.g. Overcommit will fail to distribute tasks because
* the step has wants more cpus than allocated.
*/
rc = SLURM_SUCCESS;
} else if (err_msg) {
slurm_sprint_cpu_bind_type(buf_type, req->cpu_bind_type);
xstrfmtcat(*err_msg, "JobId=%u failed to distribute tasks (bind_type:%s) - this should never happen",
req->step_id.job_id, buf_type);
error("%s", *err_msg);
}
}
if (masks)
_lllp_free_masks(maxtasks, masks);
return rc;
}
/*
* _get_local_node_info - get job allocation details for this node
* IN: req - launch request structure
* IN: job_node_id - index of the local node in the job allocation
* IN/OUT: sockets - pointer to socket count variable
* IN/OUT: cores - pointer to cores_per_socket count variable
* OUT: returns the core_bitmap index of the first core for this node
*/
static int _get_local_node_info(slurm_cred_arg_t *arg, int job_node_id,
uint16_t *sockets, uint16_t *cores)
{
int bit_start = 0, bit_finish = 0;
int i, index = -1, cur_node_id = -1;
do {
index++;
for (i = 0; i < arg->sock_core_rep_count[index] &&
cur_node_id < job_node_id; i++) {
bit_start = bit_finish;
bit_finish += arg->sockets_per_node[index] *
arg->cores_per_socket[index];
cur_node_id++;
}
} while (cur_node_id < job_node_id);
*sockets = arg->sockets_per_node[index];
*cores = arg->cores_per_socket[index];
return bit_start;
}
/*
* Determine which CPUs a job step can use.
* OUT whole_<entity>_count - returns count of whole <entities> in this
* allocation for this node
* OUT part__<entity>_count - returns count of partial <entities> in this
* allocation for this node
* RET - a string representation of the available mask or NULL on error
* NOTE: Caller must xfree() the return value.
*/
static char *_alloc_mask(launch_tasks_request_msg_t *req,
int *whole_node_cnt, int *whole_socket_cnt,
int *whole_core_cnt, int *whole_thread_cnt,
int *part_socket_cnt, int *part_core_cnt)
{
uint16_t sockets, cores, threads;
int c, s, t, i;
int c_miss, s_miss, t_miss, c_hit, t_hit;
bitstr_t *alloc_bitmap;
char *str_mask;
bitstr_t *alloc_mask;
*whole_node_cnt = 0;
*whole_socket_cnt = 0;
*whole_core_cnt = 0;
*whole_thread_cnt = 0;
*part_socket_cnt = 0;
*part_core_cnt = 0;
alloc_bitmap = _get_avail_map(req->cred, &sockets, &cores, &threads);
if (!alloc_bitmap)
return NULL;
alloc_mask = bit_alloc(bit_size(alloc_bitmap));
i = 0;
for (s = 0, s_miss = false; s < sockets; s++) {
for (c = 0, c_hit = c_miss = false; c < cores; c++) {
for (t = 0, t_hit = t_miss = false; t < threads; t++) {
/*
* If we are pretending we have a larger system
* than we really have this is needed to make
* sure we don't bust the bank.
*/
if (i >= bit_size(alloc_bitmap))
i = 0;
if (bit_test(alloc_bitmap, i)) {
bit_set(alloc_mask, i);
(*whole_thread_cnt)++;
t_hit = true;
c_hit = true;
} else
t_miss = true;
i++;
}
if (!t_miss)
(*whole_core_cnt)++;
else {
if (t_hit)
(*part_core_cnt)++;
c_miss = true;
}
}
if (!c_miss)
(*whole_socket_cnt)++;
else {
if (c_hit)
(*part_socket_cnt)++;
s_miss = true;
}
}
if (!s_miss)
(*whole_node_cnt)++;
FREE_NULL_BITMAP(alloc_bitmap);
if ((req->job_core_spec != NO_VAL16) &&
(req->job_core_spec & CORE_SPEC_THREAD) &&
(req->job_core_spec != CORE_SPEC_THREAD)) {
int spec_thread_cnt;
spec_thread_cnt = req->job_core_spec & (~CORE_SPEC_THREAD);
for (t = threads - 1;
((t > 0) && (spec_thread_cnt > 0)); t--) {
for (c = cores - 1;
((c > 0) && (spec_thread_cnt > 0)); c--) {
for (s = sockets - 1;
((s >= 0) && (spec_thread_cnt > 0)); s--) {
i = s * cores + c;
i = (i * threads) + t;
/*
* If config_overrides is used bitmap
* may be too small for the counter
*/
i %= conf->block_map_size;
bit_clear(alloc_mask, i);
spec_thread_cnt--;
}
}
}
}
/* translate abstract masks to actual hardware layout */
_lllp_map_abstract_masks(1, &alloc_mask);
#ifdef HAVE_NUMA
if (req->cpu_bind_type & CPU_BIND_TO_LDOMS) {
_match_masks_to_ldom(1, &alloc_mask);
}
#endif
str_mask = bit_fmt_hexmask(alloc_mask);
FREE_NULL_BITMAP(alloc_mask);
return str_mask;
}
/*
* Given a job step request, return an equivalent local bitmap for this node
* IN cred - The job step launch request credential
* OUT hw_sockets - number of actual sockets on this node
* OUT hw_cores - number of actual cores per socket on this node
* OUT hw_threads - number of actual threads per core on this node
* RET: bitmap of processors available to this job step on this node
* OR NULL on error
*/
static bitstr_t *_get_avail_map(slurm_cred_t *cred, uint16_t *hw_sockets,
uint16_t *hw_cores, uint16_t *hw_threads)
{
bitstr_t *req_map, *hw_map;
uint16_t p, t, new_p, num_cores, sockets, cores;
int job_node_id;
int start;
char *str;
int spec_thread_cnt = 0;
slurm_cred_arg_t *arg = slurm_cred_get_args(cred);
*hw_sockets = conf->actual_sockets;
*hw_cores = conf->actual_cores;
*hw_threads = conf->actual_threads;
/* we need this node's ID in relation to the whole
* job allocation, not just this jobstep */
job_node_id = nodelist_find(arg->job_hostlist, conf->node_name);
if ((job_node_id < 0) || (job_node_id > arg->job_nhosts)) {
error("%s: missing node %s in job credential (%s)",
__func__, conf->node_name, arg->job_hostlist);
slurm_cred_unlock_args(cred);
return NULL;
}
start = _get_local_node_info(arg, job_node_id, &sockets, &cores);
debug3("slurmctld s %u c %u; hw s %u c %u t %u",
sockets, cores, *hw_sockets, *hw_cores, *hw_threads);
num_cores = MIN((sockets * cores), ((*hw_sockets)*(*hw_cores)));
req_map = bit_alloc(num_cores);
hw_map = bit_alloc(conf->block_map_size);
/* Transfer core_bitmap data to local req_map.
* The MOD function handles the case where fewer processes
* physically exist than are configured (slurmd is out of
* sync with the slurmctld daemon). */
for (p = 0; p < (sockets * cores); p++) {
if (bit_test(arg->step_core_bitmap, start + p))
bit_set(req_map, (p % num_cores));
}
str = (char *)bit_fmt_hexmask(req_map);
debug3("%ps core mask from slurmctld: %s",
&arg->step_id, str);
xfree(str);
for (p = 0; p < num_cores; p++) {
if (bit_test(req_map, p) == 0)
continue;
/* If we are pretending we have a larger system than
we really have this is needed to make sure we
don't bust the bank.
*/
new_p = p % conf->block_map_size;
/*
* core_bitmap does not include threads, so we add them here.
* Add all configured threads. The step will be limited to
* requested threads later.
*/
for (t = 0; t < (conf->threads); t++) {
uint16_t bit = new_p * (*hw_threads) + t;
bit %= conf->block_map_size;
bit_set(hw_map, bit);
}
}
if ((arg->job_core_spec != NO_VAL16) &&
(arg->job_core_spec & CORE_SPEC_THREAD) &&
(arg->job_core_spec != CORE_SPEC_THREAD)) {
spec_thread_cnt = arg->job_core_spec & (~CORE_SPEC_THREAD);
}
if (spec_thread_cnt) {
/* Skip specialized threads as needed */
int i, t, c, s;
for (t = conf->threads - 1;
((t >= 0) && (spec_thread_cnt > 0)); t--) {
for (c = conf->cores - 1;
((c >= 0) && (spec_thread_cnt > 0)); c--) {
for (s = conf->sockets - 1;
((s >= 0) && (spec_thread_cnt > 0)); s--) {
i = s * conf->cores + c;
i = (i * conf->threads) + t;
/*
* If config_overrides is used bitmap
* may be too small for the counter
*/
i %= conf->block_map_size;
bit_clear(hw_map, i);
spec_thread_cnt--;
}
}
}
}
str = (char *)bit_fmt_hexmask(hw_map);
debug3("%ps CPU final mask for local node: %s",
&arg->step_id, str);
xfree(str);
FREE_NULL_BITMAP(req_map);
slurm_cred_unlock_args(cred);
return hw_map;
}
/* helper function for _expand_masks() */
static void _blot_mask(bitstr_t *mask, bitstr_t *avail_map, uint16_t blot)
{
uint16_t i, j, size = 0;
int prev = -1;
if (!mask)
return;
size = bit_size(mask);
for (i = 0; i < size; i++) {
if (bit_test(mask, i)) {
/* fill in this blot */
uint16_t start = (i / blot) * blot;
if (start != prev) {
for (j = start; j < start + blot; j++) {
if (bit_test(avail_map, j))
bit_set(mask, j);
}
prev = start;
}
}
}
}
/* helper function for _expand_masks()
* for each task, consider which other bits are set in avail_map
* on the same socket */
static void _blot_mask_sockets(const uint32_t maxtasks, const uint32_t task,
bitstr_t **masks, uint16_t hw_sockets,
uint16_t hw_cores, uint16_t hw_threads,
bitstr_t *avail_map)
{
uint16_t i, j, size = 0;
int blot;
if (!masks[task])
return;
blot = bit_size(avail_map) / hw_sockets;
if (blot <= 0)
blot = 1;
size = bit_size(masks[task]);
for (i = 0; i < size; i++) {
if (bit_test(masks[task], i)) {
/* check if other bits are set in avail_map on this
* socket and set each corresponding bit in masks */
uint16_t start = (i / blot) * blot;
for (j = start; j < start+blot; j++) {
if (bit_test(avail_map, j))
bit_set(masks[task], j);
}
}
}
}
/* for each mask, expand the mask around the set bits to include the
* complete resource to which the set bits are to be bound */
static void _expand_masks(uint16_t cpu_bind_type, const uint32_t maxtasks,
bitstr_t **masks, uint16_t hw_sockets,
uint16_t hw_cores, uint16_t hw_threads,
bitstr_t *avail_map)
{
uint32_t i;
if (cpu_bind_type & CPU_BIND_TO_THREADS)
return;
if (cpu_bind_type & CPU_BIND_TO_CORES) {
if (hw_threads < 2)
return;
for (i = 0; i < maxtasks; i++) {
_blot_mask(masks[i], avail_map, hw_threads);
}
return;
}
if (cpu_bind_type & CPU_BIND_TO_SOCKETS) {
if (hw_threads*hw_cores < 2)
return;
for (i = 0; i < maxtasks; i++) {
_blot_mask_sockets(maxtasks, i, masks, hw_sockets,
hw_cores, hw_threads, avail_map);
}
return;
}
}
/*
* _task_layout_lllp_cyclic
*
* task_layout_lllp_cyclic creates a cyclic distribution at the
* lowest level of logical processor which is either socket, core or
* thread depending on the system architecture. The Cyclic algorithm
* is the same as the Cyclic distribution performed in srun.
*
* Distribution at the lllp:
* -m hostfile|block|cyclic:block|cyclic
*
* The first distribution "hostfile|block|cyclic" is computed
* in srun. The second distribution "block|cyclic" is computed
* locally by each slurmd.
*
* The input to the lllp distribution algorithms is the gids (tasks
* ids) generated for the local node.
*
* The output is a mapping of the gids onto logical processors
* (thread/core/socket) with is expressed cpu_bind masks.
*
* If a task asks for more than one CPU per task, put the tasks as
* close as possible (fill core rather than going next socket for the
* extra task)
*
*/
static int _task_layout_lllp_cyclic(launch_tasks_request_msg_t *req,
uint32_t node_id, bitstr_t ***masks_p)
{
int last_taskcount = -1, taskcount = 0;
uint16_t i, s, hw_sockets = 0, hw_cores = 0, hw_threads = 0;
uint16_t offset = 0, p = 0;
int size, max_tasks = req->tasks_to_launch[node_id];
int max_cpus = max_tasks * req->cpus_per_task;
bitstr_t *avail_map;
bitstr_t **masks = NULL;
int *socket_last_pu = NULL;
int core_inx, pu_per_core, *core_tasks = NULL, *core_threads = NULL;
int req_threads_per_core = 0;
info ("_task_layout_lllp_cyclic ");
avail_map = _get_avail_map(req->cred, &hw_sockets, &hw_cores,
&hw_threads);
if (!avail_map)
return ESLURMD_CPU_LAYOUT_ERROR;
if (req->threads_per_core && (req->threads_per_core != NO_VAL16))
req_threads_per_core = req->threads_per_core;
else if (req->cpu_bind_type & CPU_BIND_ONE_THREAD_PER_CORE)
req_threads_per_core = 1;
size = bit_set_count(avail_map);
/*
* If configured threads > hw threads, then we are oversubscribing
* threads, so don't check the number of bits set.
*/
if (req_threads_per_core && (conf->threads <= hw_threads)) {
if (size < (req->cpus_per_task * (conf->threads /
req_threads_per_core))) {
error("only %d bits in avail_map, threads_per_core requires %d!",
size,
(req->cpus_per_task * (conf->threads /
req_threads_per_core)));
FREE_NULL_BITMAP(avail_map);
return ESLURMD_CPU_LAYOUT_ERROR;
}
}
if (size < max_tasks) {
if (!(req->flags & LAUNCH_OVERCOMMIT))
error("only %d bits in avail_map for %d tasks!",
size, max_tasks);
FREE_NULL_BITMAP(avail_map);
return ESLURMD_CPU_LAYOUT_ERROR;
}
if (size < max_cpus) {
/* Possible result of overcommit */
i = size / max_tasks;
info("reset cpus_per_task from %d to %d",
req->cpus_per_task, i);
req->cpus_per_task = i;
}
pu_per_core = hw_threads;
core_tasks = xcalloc(hw_sockets * hw_cores, sizeof(int));
core_threads = xcalloc(hw_sockets * hw_cores, sizeof(int));
socket_last_pu = xcalloc(hw_sockets, sizeof(int));
*masks_p = xcalloc(max_tasks, sizeof(bitstr_t *));
masks = *masks_p;
size = bit_size(avail_map);
offset = hw_cores * hw_threads;
s = 0;
while (taskcount < max_tasks) {
if (taskcount == last_taskcount) {
error("_task_layout_lllp_cyclic failure");
FREE_NULL_BITMAP(avail_map);
xfree(core_tasks);
xfree(core_threads);
xfree(socket_last_pu);
return ESLURMD_CPU_LAYOUT_ERROR;
}
last_taskcount = taskcount;
for (i = 0; i < size; i++) {
bool already_switched = false;
uint16_t bit;
uint16_t orig_s = s;
while (socket_last_pu[s] >= offset) {
/* Switch to the next socket we have
* ran out here. */
/* This only happens if the slurmctld
* gave us an allocation that made a
* task split sockets. Or if the
* entire allocation is on one socket.
*/
s = (s + 1) % hw_sockets;
if (orig_s == s) {
/* This should rarely happen,
* but is here for sanity sake.
*/
debug("allocation is full, "
"oversubscribing");
memset(core_tasks, 0,
(sizeof(int) *
hw_sockets * hw_cores));
memset(core_threads, 0,
(sizeof(int) *
hw_sockets * hw_cores));
memset(socket_last_pu, 0,
(sizeof(int) * hw_sockets));
}
}
bit = socket_last_pu[s] + (s * offset);
/* In case hardware and config differ */
bit %= size;
/* set up for the next one */
socket_last_pu[s]++;
if (!bit_test(avail_map, bit))
continue;
core_inx = bit / pu_per_core;
if ((req->ntasks_per_core != 0) &&
(core_tasks[core_inx] >= req->ntasks_per_core))
continue;
if (req_threads_per_core &&
(core_threads[core_inx] >= req_threads_per_core))
continue;
if (!masks[taskcount])
masks[taskcount] =
bit_alloc(conf->block_map_size);
//info("setting %d %d", taskcount, bit);
bit_set(masks[taskcount], bit);
if (!already_switched &&
(((req->task_dist & SLURM_DIST_NODESOCKMASK) ==
SLURM_DIST_CYCLIC_CFULL) ||
((req->task_dist & SLURM_DIST_NODESOCKMASK) ==
SLURM_DIST_BLOCK_CFULL))) {
/* This means we are laying out cpus
* within a task cyclically as well. */
s = (s + 1) % hw_sockets;
already_switched = true;
}
core_threads[core_inx]++;
if (++p < req->cpus_per_task)
continue;
core_tasks[core_inx]++;
/* Binding to cores, skip remaining of the threads */
if ((req->cpu_bind_type & CPU_BIND_TO_CORES) ||
(req->ntasks_per_core == 1)) {
int threads_not_used;
if (req->cpus_per_task < hw_threads)
threads_not_used =
hw_threads - req->cpus_per_task;
else
threads_not_used =
req->cpus_per_task % hw_threads;
socket_last_pu[s] += threads_not_used;
}
p = 0;
if (!already_switched) {
/* Now that we have finished a task, switch to
* the next socket. */
s = (s + 1) % hw_sockets;
}
if (++taskcount >= max_tasks)
break;
}
}
/* last step: expand the masks to bind each task
* to the requested resource */
_expand_masks(req->cpu_bind_type, max_tasks, masks,
hw_sockets, hw_cores, hw_threads, avail_map);
FREE_NULL_BITMAP(avail_map);
xfree(core_tasks);
xfree(core_threads);
xfree(socket_last_pu);
return SLURM_SUCCESS;
}
/*
* _task_layout_lllp_block
*
* task_layout_lllp_block will create a block distribution at the
* lowest level of logical processor which is either socket, core or
* thread depending on the system architecture. The Block algorithm
* is the same as the Block distribution performed in srun.
*
* Distribution at the lllp:
* -m hostfile|plane|block|cyclic:block|cyclic
*
* The first distribution "hostfile|plane|block|cyclic" is computed
* in srun. The second distribution "plane|block|cyclic" is computed
* locally by each slurmd.
*
* The input to the lllp distribution algorithms is the gids (tasks
* ids) generated for the local node.
*
* The output is a mapping of the gids onto logical processors
* (thread/core/socket) with is expressed cpu_bind masks.
*
*/
static int _task_layout_lllp_block(launch_tasks_request_msg_t *req,
uint32_t node_id, bitstr_t ***masks_p)
{
int c, i, size, last_taskcount = -1, taskcount = 0;
uint16_t hw_sockets = 0, hw_cores = 0, hw_threads = 0;
int max_tasks = req->tasks_to_launch[node_id];
int max_cpus = max_tasks * req->cpus_per_task;
bitstr_t *avail_map;
bitstr_t **masks = NULL;
int core_inx, pu_per_core, *core_tasks = NULL, *core_threads = NULL;
int sock_inx, pu_per_socket, *socket_tasks = NULL;
int req_threads_per_core = 0;
info("_task_layout_lllp_block ");
avail_map = _get_avail_map(req->cred, &hw_sockets, &hw_cores,
&hw_threads);
if (!avail_map) {
return ESLURMD_CPU_LAYOUT_ERROR;
}
if (req->threads_per_core && (req->threads_per_core != NO_VAL16))
req_threads_per_core = req->threads_per_core;
else if (req->cpu_bind_type & CPU_BIND_ONE_THREAD_PER_CORE)
req_threads_per_core = 1;
size = bit_set_count(avail_map);
/*
* If configured threads > hw threads, then we are oversubscribing
* threads, so don't check the number of bits set.
*/
if (req_threads_per_core && (conf->threads <= hw_threads)) {
if (size < (req->cpus_per_task * (conf->threads /
req_threads_per_core))) {
error("only %d bits in avail_map, threads_per_core requires %d!",
size,
(req->cpus_per_task * (conf->threads /
req_threads_per_core)));
FREE_NULL_BITMAP(avail_map);
return ESLURMD_CPU_LAYOUT_ERROR;
}
}
if (size < max_tasks) {
if (!(req->flags & LAUNCH_OVERCOMMIT))
error("only %d bits in avail_map for %d tasks!",
size, max_tasks);
FREE_NULL_BITMAP(avail_map);
return ESLURMD_CPU_LAYOUT_ERROR;
}
if (size < max_cpus) {
/* Possible result of overcommit */
i = size / max_tasks;
info("reset cpus_per_task from %d to %d",
req->cpus_per_task, i);
req->cpus_per_task = i;
}
size = bit_size(avail_map);
*masks_p = xcalloc(max_tasks, sizeof(bitstr_t *));
masks = *masks_p;
pu_per_core = hw_threads;
core_tasks = xcalloc(hw_sockets * hw_cores, sizeof(int));
core_threads = xcalloc(hw_sockets * hw_cores, sizeof(int));
pu_per_socket = hw_cores * hw_threads;
socket_tasks = xcalloc(hw_sockets, sizeof(int));
/* block distribution with oversubsciption */
c = 0;
while (taskcount < max_tasks) {
if (taskcount == last_taskcount) {
error("_task_layout_lllp_block infinite loop");
FREE_NULL_BITMAP(avail_map);
xfree(core_tasks);
xfree(core_threads);
xfree(socket_tasks);
return ESLURMD_CPU_LAYOUT_ERROR;
}
if (taskcount > 0) {
/* Clear counters to over-subscribe, if necessary */
memset(core_tasks, 0,
(sizeof(int) * hw_sockets * hw_cores));
memset(core_threads, 0,
(sizeof(int) * hw_sockets * hw_cores));
memset(socket_tasks, 0,
(sizeof(int) * hw_sockets));
}
last_taskcount = taskcount;
/* the abstract map is already laid out in block order,
* so just iterate over it
*/
for (i = 0; i < size; i++) {
/* skip unavailable resources */
if (bit_test(avail_map, i) == 0)
continue;
core_inx = i / pu_per_core;
if ((req->ntasks_per_core != 0) &&
(core_tasks[core_inx] >= req->ntasks_per_core))
continue;
sock_inx = i / pu_per_socket;
if ((req->ntasks_per_socket != 0) &&
(socket_tasks[sock_inx] >= req->ntasks_per_socket))
continue;
if (req_threads_per_core &&
(core_threads[core_inx] >= req_threads_per_core))
continue;
if (!masks[taskcount])
masks[taskcount] = bit_alloc(
conf->block_map_size);
//info("setting %d %d", taskcount, i);
bit_set(masks[taskcount], i);
core_threads[core_inx]++;
if (++c < req->cpus_per_task)
continue;
/* We found one! Increment the count on each unit */
core_tasks[core_inx]++;
socket_tasks[sock_inx]++;
/* Binding to cores, skip remaining of the threads */
if ((req->cpu_bind_type & CPU_BIND_TO_CORES) ||
(req->ntasks_per_core == 1)) {
int threads_not_used;
if (req->cpus_per_task < hw_threads)
threads_not_used =
hw_threads - req->cpus_per_task;
else
threads_not_used =
req->cpus_per_task % hw_threads;
i += threads_not_used;
}
c = 0;
if (++taskcount >= max_tasks)
break;
}
}
xfree(core_tasks);
xfree(core_threads);
xfree(socket_tasks);
/* last step: expand the masks to bind each task
* to the requested resource */
_expand_masks(req->cpu_bind_type, max_tasks, masks,
hw_sockets, hw_cores, hw_threads, avail_map);
FREE_NULL_BITMAP(avail_map);
return SLURM_SUCCESS;
}
/*
* _lllp_map_abstract_mask
*
* Map one abstract block mask to a physical machine mask
*
* IN - mask to map
* OUT - mapped mask (storage allocated in this routine)
*/
static bitstr_t *_lllp_map_abstract_mask(bitstr_t *bitmask)
{
int i, bit;
int num_bits = bit_size(bitmask);
bitstr_t *newmask = bit_alloc(num_bits);
/* remap to physical machine */
for (i = 0; i < num_bits; i++) {
if (bit_test(bitmask,i)) {
bit = BLOCK_MAP(i);
if (bit < bit_size(newmask))
bit_set(newmask, bit);
else
error("can't go from %d -> %d since we "
"only have %"BITSTR_FMT" bits",
i, bit, bit_size(newmask));
}
}
return newmask;
}
/*
* _lllp_map_abstract_masks
*
* Map an array of abstract block masks to physical machine masks
*
* IN- maximum number of tasks
* IN/OUT- array of masks
*/
static void _lllp_map_abstract_masks(const uint32_t maxtasks, bitstr_t **masks)
{
int i;
debug3("_lllp_map_abstract_masks");
for (i = 0; i < maxtasks; i++) {
bitstr_t *bitmask = masks[i];
if (bitmask) {
bitstr_t *newmask = _lllp_map_abstract_mask(bitmask);
FREE_NULL_BITMAP(bitmask);
masks[i] = newmask;
}
}
}
/*
* _lllp_generate_cpu_bind
*
* Generate the cpu_bind type and string given an array of bitstr_t masks
*
* IN/OUT- job launch request (cpu_bind_type and cpu_bind updated)
* IN- maximum number of tasks
* IN- array of masks
*/
static void _lllp_generate_cpu_bind(launch_tasks_request_msg_t *req,
const uint32_t maxtasks, bitstr_t **masks)
{
int i, num_bits = 0, masks_len;
bitstr_t *bitmask;
bitoff_t charsize;
char *masks_str = NULL;
char buf_type[100];
for (i = 0; i < maxtasks; i++) {
bitmask = masks[i];
if (bitmask) {
num_bits = bit_size(bitmask);
break;
}
}
charsize = (num_bits + 3) / 4; /* ASCII hex digits */
charsize += 3; /* "0x" and trailing "," */
masks_len = maxtasks * charsize + 1; /* number of masks + null */
debug3("%d %"BITSTR_FMT" %d", maxtasks, charsize,
masks_len);
masks_str = xmalloc(masks_len);
masks_len = 0;
for (i = 0; i < maxtasks; i++) {
char *str;
int curlen;
bitmask = masks[i];
if (bitmask == NULL) {
continue;
}
str = (char *)bit_fmt_hexmask(bitmask);
curlen = strlen(str) + 1;
if (masks_len > 0)
masks_str[masks_len - 1] = ',';
strlcpy(&masks_str[masks_len], str, curlen);
masks_len += curlen;
xfree(str);
}
if (req->cpu_bind) {
xfree(req->cpu_bind);
}
if (masks_str[0] != '\0') {
req->cpu_bind = masks_str;
masks_str = NULL;
req->cpu_bind_type |= CPU_BIND_MASK;
} else {
req->cpu_bind = NULL;
req->cpu_bind_type &= ~CPU_BIND_VERBOSE;
}
xfree(masks_str);
/* clear mask generation bits */
req->cpu_bind_type &= ~CPU_BIND_TO_THREADS;
req->cpu_bind_type &= ~CPU_BIND_TO_CORES;
req->cpu_bind_type &= ~CPU_BIND_TO_SOCKETS;
req->cpu_bind_type &= ~CPU_BIND_TO_LDOMS;
slurm_sprint_cpu_bind_type(buf_type, req->cpu_bind_type);
info("_lllp_generate_cpu_bind jobid [%u]: %s, %s",
req->step_id.job_id, buf_type, req->cpu_bind);
}