/*
* _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[(int)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;
info ("_task_layout_lllp_cyclic ");
avail_map = _get_avail_map(req, &hw_sockets, &hw_cores, &hw_threads);
if (!avail_map)
return SLURM_ERROR;
size = bit_set_count(avail_map);
if (size < max_tasks) {
error("task/affinity: only %d bits in avail_map for %d tasks!",
size, max_tasks);
FREE_NULL_BITMAP(avail_map);
return SLURM_ERROR;
}
if (size < max_cpus) {
/* Possible result of overcommit */
i = size / max_tasks;
info("task/affinity: 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 = xmalloc(sizeof(int) * hw_sockets * hw_cores);
socket_last_pu = xmalloc(hw_sockets * sizeof(int));
*masks_p = xmalloc(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)
fatal("_task_layout_lllp_cyclic failure");
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(socket_last_pu, 0,
sizeof(hw_sockets
* sizeof(int)));
}
}
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]++;
/* skip unrequested threads */
if (req->cpu_bind_type & CPU_BIND_ONE_THREAD_PER_CORE)
socket_last_pu[s] += hw_threads - 1;
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 (!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_STATE_BASE) ==
SLURM_DIST_CYCLIC_CFULL) ||
((req->task_dist & SLURM_DIST_STATE_BASE) ==
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;
}
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_ONE_THREAD_PER_CORE)
&& ((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(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[(int)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;
int sock_inx, pu_per_socket, *socket_tasks = NULL;
info("_task_layout_lllp_block ");
avail_map = _get_avail_map(req, &hw_sockets, &hw_cores, &hw_threads);
if (!avail_map) {
return SLURM_ERROR;
}
size = bit_set_count(avail_map);
if (size < max_tasks) {
error("task/affinity: only %d bits in avail_map for %d tasks!",
size, max_tasks);
FREE_NULL_BITMAP(avail_map);
return SLURM_ERROR;
}
if (size < max_cpus) {
/* Possible result of overcommit */
i = size / max_tasks;
info("task/affinity: reset cpus_per_task from %d to %d",
req->cpus_per_task, i);
req->cpus_per_task = i;
}
size = bit_size(avail_map);
if ((req->cpu_bind_type & CPU_BIND_ONE_THREAD_PER_CORE) &&
(max_cpus > (hw_sockets * hw_cores))) {
/* More CPUs requested than available cores,
* disable core-level binding */
req->cpu_bind_type &= (~CPU_BIND_ONE_THREAD_PER_CORE);
}
*masks_p = xmalloc(max_tasks * sizeof(bitstr_t*));
masks = *masks_p;
pu_per_core = hw_threads;
core_tasks = xmalloc(sizeof(int) * hw_sockets * hw_cores);
pu_per_socket = hw_cores * hw_threads;
socket_tasks = xmalloc(sizeof(int) * hw_sockets);
/* block distribution with oversubsciption */
c = 0;
while (taskcount < max_tasks) {
if (taskcount == last_taskcount)
fatal("_task_layout_lllp_block infinite loop");
if (taskcount > 0) {
/* Clear counters to over-subscribe, if necessary */
memset(core_tasks, 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;
socket_tasks[sock_inx]++;
if (!masks[taskcount])
masks[taskcount] = bit_alloc(
conf->block_map_size);
//info("setting %d %d", taskcount, i);
bit_set(masks[taskcount], i);
/* skip unrequested threads */
if (req->cpu_bind_type & CPU_BIND_ONE_THREAD_PER_CORE)
i += hw_threads - 1;
if (++c < req->cpus_per_task)
continue;
core_tasks[core_inx]++;
/* Binding to cores, skip remaining of the threads */
if (!(req->cpu_bind_type & CPU_BIND_ONE_THREAD_PER_CORE)
&& ((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(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;
}
/*
* _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|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_cyclic(launch_tasks_request_msg_t *req,
uint32_t node_id, bitstr_t ***masks_p)
{
int last_taskcount = -1, taskcount = 0;
uint16_t c, i, s, t, hw_sockets = 0, hw_cores = 0, hw_threads = 0;
int size, max_tasks = req->tasks_to_launch[(int)node_id];
int max_cpus = max_tasks * req->cpus_per_task;
int avail_size;
bitstr_t *avail_map;
bitstr_t **masks = NULL;
info ("_task_layout_lllp_cyclic ");
avail_map = _get_avail_map(req, &hw_sockets, &hw_cores, &hw_threads);
if (!avail_map)
return SLURM_ERROR;
avail_size = bit_size(avail_map);
*masks_p = xmalloc(max_tasks * sizeof(bitstr_t*));
masks = *masks_p;
size = bit_set_count(avail_map);
if (size < max_tasks) {
error("task/affinity: only %d bits in avail_map for %d tasks!",
size, max_tasks);
FREE_NULL_BITMAP(avail_map);
return SLURM_ERROR;
}
if (size < max_cpus) {
/* Possible result of overcommit */
i = size / max_tasks;
info("task/affinity: reset cpus_per_task from %d to %d",
req->cpus_per_task, i);
req->cpus_per_task = i;
}
i = 0;
while (taskcount < max_tasks) {
if (taskcount == last_taskcount)
fatal("_task_layout_lllp_cyclic failure");
last_taskcount = taskcount;
for (t = 0; t < hw_threads; t++) {
for (c = 0; c < hw_cores; c++) {
for (s = 0; s < hw_sockets; s++) {
uint16_t bit = s*(hw_cores*hw_threads) +
c*(hw_threads) + t;
/* In case hardware and config differ */
bit %= avail_size;
if (bit_test(avail_map, bit) == 0)
continue;
if (masks[taskcount] == NULL) {
masks[taskcount] =
(bitstr_t *)
bit_alloc(conf->
block_map_size);
}
bit_set(masks[taskcount], bit);
if (++i < req->cpus_per_task)
continue;
i = 0;
if (++taskcount >= max_tasks)
break;
}
if (taskcount >= max_tasks)
break;
}
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);
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, j, t, size, last_taskcount = -1, taskcount = 0;
uint16_t hw_sockets = 0, hw_cores = 0, hw_threads = 0;
int max_tasks = req->tasks_to_launch[(int)node_id];
int max_cpus = max_tasks * req->cpus_per_task;
int *task_array;
bitstr_t *avail_map;
bitstr_t **masks = NULL;
info("_task_layout_lllp_block ");
avail_map = _get_avail_map(req, &hw_sockets, &hw_cores, &hw_threads);
if (!avail_map) {
return SLURM_ERROR;
}
size = bit_set_count(avail_map);
if (size < max_tasks) {
error("task/affinity: only %d bits in avail_map for %d tasks!",
size, max_tasks);
FREE_NULL_BITMAP(avail_map);
return SLURM_ERROR;
}
if (size < max_cpus) {
/* Possible result of overcommit */
i = size / max_tasks;
info("task/affinity: 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 = xmalloc(max_tasks * sizeof(bitstr_t*));
masks = *masks_p;
task_array = xmalloc(size * sizeof(int));
if (!task_array) {
error("In lllp_block: task_array memory error");
FREE_NULL_BITMAP(avail_map);
return SLURM_ERROR;
}
/* block distribution with oversubsciption */
c = 0;
while(taskcount < max_tasks) {
if (taskcount == last_taskcount) {
fatal("_task_layout_lllp_block infinite loop");
}
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 unrequested threads */
if (i%hw_threads >= hw_threads)
continue;
/* skip unavailable resources */
if (bit_test(avail_map, i) == 0)
continue;
/* if multiple CPUs per task, only
* count the task on the first CPU */
if (c == 0)
task_array[i] += 1;
if (++c < req->cpus_per_task)
continue;
c = 0;
if (++taskcount >= max_tasks)
break;
}
}
/* Distribute the tasks and create per-task masks that only
* contain the first CPU. Note that unused resources
* (task_array[i] == 0) will get skipped */
taskcount = 0;
for (i = 0; i < size; i++) {
for (t = 0; t < task_array[i]; t++) {
if (masks[taskcount] == NULL)
masks[taskcount] = (bitstr_t *)bit_alloc(conf->block_map_size);
bit_set(masks[taskcount++], i);
}
}
/* now set additional CPUs for cpus_per_task > 1 */
for (t=0; t<max_tasks && req->cpus_per_task>1; t++) {
if (!masks[t])
continue;
c = 0;
for (i = 0; i < size && c<req->cpus_per_task; i++) {
if (bit_test(masks[t], i) == 0)
continue;
for (j=i+1,c=1; j<size && c<req->cpus_per_task;j++) {
if (bit_test(avail_map, j) == 0)
continue;
bit_set(masks[t], j);
c++;
}
if (c < req->cpus_per_task) {
/* we haven't found all of the CPUs for this
* task, so we'll wrap the search to cover the
* whole node */
for (j=0; j<i && c<req->cpus_per_task; j++) {
if (bit_test(avail_map, j) == 0)
continue;
bit_set(masks[t], j);
c++;
}
}
}
}
xfree(task_array);
/* 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;
}
/*
* _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[(int)node_id];
int max_cpus = max_tasks * req->cpus_per_task;
bitstr_t *avail_map;
bitstr_t **masks = NULL;
info("_task_layout_lllp_block ");
avail_map = _get_avail_map(req, &hw_sockets, &hw_cores, &hw_threads);
if (!avail_map) {
return SLURM_ERROR;
}
size = bit_set_count(avail_map);
if (size < max_tasks) {
error("task/affinity: only %d bits in avail_map for %d tasks!",
size, max_tasks);
FREE_NULL_BITMAP(avail_map);
return SLURM_ERROR;
}
if (size < max_cpus) {
/* Possible result of overcommit */
i = size / max_tasks;
info("task/affinity: 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 = xmalloc(max_tasks * sizeof(bitstr_t*));
masks = *masks_p;
/* block distribution with oversubsciption */
c = 0;
while(taskcount < max_tasks) {
if (taskcount == last_taskcount) {
fatal("_task_layout_lllp_block infinite loop");
}
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;
if (!masks[taskcount])
masks[taskcount] = bit_alloc(
conf->block_map_size);
//info("setting %d %d", taskcount, i);
bit_set(masks[taskcount], i);
/* skip unrequested threads */
if (req->cpu_bind_type & CPU_BIND_ONE_THREAD_PER_CORE)
i += hw_threads-1;
if (++c < req->cpus_per_task)
continue;
c = 0;
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);
return SLURM_SUCCESS;
}
