2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
19 #include <vppinfra/format.h>
20 #include <vppinfra/time_range.h>
21 #include <vppinfra/interrupt.h>
22 #include <vppinfra/linux/sysfs.h>
23 #include <vlib/vlib.h>
25 #include <vlib/threads.h>
27 #include <vlib/stats/stats.h>
35 vlib_worker_thread_t *vlib_worker_threads;
36 vlib_thread_main_t vlib_thread_main;
39 * Barrier tracing can be enabled on a normal build to collect information
40 * on barrier use, including timings and call stacks. Deliberately not
41 * keyed off CLIB_DEBUG, because that can add significant overhead which
42 * imapacts observed timings.
46 barrier_trace_sync (f64 t_entry, f64 t_open, f64 t_closed)
48 if (!vlib_worker_threads->barrier_elog_enabled)
51 ELOG_TYPE_DECLARE (e) = {
52 .format = "bar-trace-%s-#%d",
53 .format_args = "T4i4",
58 u32 caller, count, t_entry, t_open, t_closed;
61 ed = ELOG_DATA (&vlib_global_main.elog_main, e);
62 ed->count = (int) vlib_worker_threads[0].barrier_sync_count;
63 ed->caller = elog_string (&vlib_global_main.elog_main,
64 (char *) vlib_worker_threads[0].barrier_caller);
65 ed->t_entry = (int) (1000000.0 * t_entry);
66 ed->t_open = (int) (1000000.0 * t_open);
67 ed->t_closed = (int) (1000000.0 * t_closed);
71 barrier_trace_sync_rec (f64 t_entry)
73 if (!vlib_worker_threads->barrier_elog_enabled)
76 ELOG_TYPE_DECLARE (e) = {
77 .format = "bar-syncrec-%s-#%d",
78 .format_args = "T4i4",
86 ed = ELOG_DATA (&vlib_global_main.elog_main, e);
87 ed->depth = (int) vlib_worker_threads[0].recursion_level - 1;
88 ed->caller = elog_string (&vlib_global_main.elog_main,
89 (char *) vlib_worker_threads[0].barrier_caller);
93 barrier_trace_release_rec (f64 t_entry)
95 if (!vlib_worker_threads->barrier_elog_enabled)
98 ELOG_TYPE_DECLARE (e) = {
99 .format = "bar-relrrec-#%d",
108 ed = ELOG_DATA (&vlib_global_main.elog_main, e);
109 ed->depth = (int) vlib_worker_threads[0].recursion_level;
113 barrier_trace_release (f64 t_entry, f64 t_closed_total, f64 t_update_main)
115 if (!vlib_worker_threads->barrier_elog_enabled)
118 ELOG_TYPE_DECLARE (e) = {
119 .format = "bar-rel-#%d-e%d-u%d-t%d",
120 .format_args = "i4i4i4i4",
125 u32 count, t_entry, t_update_main, t_closed_total;
128 ed = ELOG_DATA (&vlib_global_main.elog_main, e);
129 ed->t_entry = (int) (1000000.0 * t_entry);
130 ed->t_update_main = (int) (1000000.0 * t_update_main);
131 ed->t_closed_total = (int) (1000000.0 * t_closed_total);
132 ed->count = (int) vlib_worker_threads[0].barrier_sync_count;
134 /* Reset context for next trace */
135 vlib_worker_threads[0].barrier_context = NULL;
139 os_get_nthreads (void)
141 return vec_len (vlib_thread_stacks);
145 vlib_set_thread_name (char *name)
147 int pthread_setname_np (pthread_t __target_thread, const char *__name);
149 pthread_t thread = pthread_self ();
153 rv = pthread_setname_np (thread, name);
155 clib_warning ("pthread_setname_np returned %d", rv);
160 sort_registrations_by_no_clone (void *a0, void *a1)
162 vlib_thread_registration_t **tr0 = a0;
163 vlib_thread_registration_t **tr1 = a1;
165 return ((i32) ((*tr0)->no_data_structure_clone)
166 - ((i32) ((*tr1)->no_data_structure_clone)));
170 /* Called early in the init sequence */
173 vlib_thread_init (vlib_main_t * vm)
175 vlib_thread_main_t *tm = &vlib_thread_main;
176 vlib_worker_thread_t *w;
177 vlib_thread_registration_t *tr;
178 u32 n_vlib_mains = 1;
182 u32 stats_num_worker_threads_dir_index;
184 stats_num_worker_threads_dir_index =
185 vlib_stats_add_gauge ("/sys/num_worker_threads");
186 ASSERT (stats_num_worker_threads_dir_index != ~0);
188 /* get bitmaps of active cpu cores and sockets */
189 tm->cpu_core_bitmap =
190 clib_sysfs_list_to_bitmap ("/sys/devices/system/cpu/online");
191 tm->cpu_socket_bitmap =
192 clib_sysfs_list_to_bitmap ("/sys/devices/system/node/online");
194 avail_cpu = clib_bitmap_dup (tm->cpu_core_bitmap);
197 for (i = 0; i < tm->skip_cores; i++)
199 uword c = clib_bitmap_first_set (avail_cpu);
201 return clib_error_return (0, "no available cpus to skip");
203 avail_cpu = clib_bitmap_set (avail_cpu, c, 0);
206 /* grab cpu for main thread */
207 if (tm->main_lcore != ~0)
209 if (clib_bitmap_get (avail_cpu, tm->main_lcore) == 0)
210 return clib_error_return (0, "cpu %u is not available to be used"
211 " for the main thread", tm->main_lcore);
212 avail_cpu = clib_bitmap_set (avail_cpu, tm->main_lcore, 0);
215 /* assume that there is socket 0 only if there is no data from sysfs */
216 if (!tm->cpu_socket_bitmap)
217 tm->cpu_socket_bitmap = clib_bitmap_set (0, 0, 1);
219 /* pin main thread to main_lcore */
220 if (tm->main_lcore != ~0)
224 CPU_SET (tm->main_lcore, &cpuset);
225 if (pthread_setaffinity_np (pthread_self (), sizeof (cpu_set_t),
228 return clib_error_return (0, "could not pin main thread to cpu %u",
233 /* Set up thread 0 */
234 vec_validate_aligned (vlib_worker_threads, 0, CLIB_CACHE_LINE_BYTES);
235 vec_set_len (vlib_worker_threads, 1);
236 w = vlib_worker_threads;
237 w->thread_mheap = clib_mem_get_heap ();
238 w->thread_stack = vlib_thread_stacks[0];
239 w->cpu_id = tm->main_lcore;
240 w->lwp = syscall (SYS_gettid);
241 w->thread_id = pthread_self ();
242 tm->n_vlib_mains = 1;
244 vlib_get_thread_core_numa (w, w->cpu_id);
246 if (tm->sched_policy != ~0)
248 struct sched_param sched_param;
249 if (!sched_getparam (w->lwp, &sched_param))
251 if (tm->sched_priority != ~0)
252 sched_param.sched_priority = tm->sched_priority;
253 sched_setscheduler (w->lwp, tm->sched_policy, &sched_param);
257 /* assign threads to cores and set n_vlib_mains */
262 vec_add1 (tm->registrations, tr);
266 vec_sort_with_function (tm->registrations, sort_registrations_by_no_clone);
268 for (i = 0; i < vec_len (tm->registrations); i++)
271 tr = tm->registrations[i];
272 tr->first_index = first_index;
273 first_index += tr->count;
274 n_vlib_mains += (tr->no_data_structure_clone == 0) ? tr->count : 0;
276 /* construct coremask */
277 if (tr->use_pthreads || !tr->count)
284 clib_bitmap_foreach (c, tr->coremask) {
285 if (clib_bitmap_get(avail_cpu, c) == 0)
286 return clib_error_return (0, "cpu %u is not available to be used"
287 " for the '%s' thread",c, tr->name);
289 avail_cpu = clib_bitmap_set(avail_cpu, c, 0);
295 for (j = 0; j < tr->count; j++)
297 /* Do not use CPU 0 by default - leave it to the host and IRQs */
298 uword avail_c0 = clib_bitmap_get (avail_cpu, 0);
299 avail_cpu = clib_bitmap_set (avail_cpu, 0, 0);
301 uword c = clib_bitmap_first_set (avail_cpu);
302 /* Use CPU 0 as a last resort */
303 if (c == ~0 && avail_c0)
310 return clib_error_return (0,
311 "no available cpus to be used for"
312 " the '%s' thread #%u",
313 tr->name, tr->count);
315 avail_cpu = clib_bitmap_set (avail_cpu, 0, avail_c0);
316 avail_cpu = clib_bitmap_set (avail_cpu, c, 0);
317 tr->coremask = clib_bitmap_set (tr->coremask, c, 1);
322 clib_bitmap_free (avail_cpu);
324 tm->n_vlib_mains = n_vlib_mains;
325 vlib_stats_set_gauge (stats_num_worker_threads_dir_index, n_vlib_mains - 1);
328 * Allocate the remaining worker threads, and thread stack vector slots
329 * from now on, calls to os_get_nthreads() will return the correct
332 vec_validate_aligned (vlib_worker_threads, first_index - 1,
333 CLIB_CACHE_LINE_BYTES);
334 vec_validate (vlib_thread_stacks, vec_len (vlib_worker_threads) - 1);
339 vlib_frame_queue_alloc (int nelts)
341 vlib_frame_queue_t *fq;
343 fq = clib_mem_alloc_aligned (sizeof (*fq), CLIB_CACHE_LINE_BYTES);
344 clib_memset (fq, 0, sizeof (*fq));
346 fq->vector_threshold = 2 * VLIB_FRAME_SIZE;
347 vec_validate_aligned (fq->elts, nelts - 1, CLIB_CACHE_LINE_BYTES);
349 if (nelts & (nelts - 1))
351 fformat (stderr, "FATAL: nelts MUST be a power of 2\n");
358 void vl_msg_api_handler_no_free (void *) __attribute__ ((weak));
360 vl_msg_api_handler_no_free (void *v)
364 /* To be called by vlib worker threads upon startup */
366 vlib_worker_thread_init (vlib_worker_thread_t * w)
368 vlib_thread_main_t *tm = vlib_get_thread_main ();
371 * Note: disabling signals in worker threads as follows
372 * prevents the api post-mortem dump scheme from working
376 * pthread_sigmask (SIG_SETMASK, &s, 0);
380 clib_mem_set_heap (w->thread_mheap);
382 if (vec_len (tm->thread_prefix) && w->registration->short_name)
384 w->name = format (0, "%v_%s_%d%c", tm->thread_prefix,
385 w->registration->short_name, w->instance_id, '\0');
386 vlib_set_thread_name ((char *) w->name);
389 if (!w->registration->use_pthreads)
392 /* Initial barrier sync, for both worker and i/o threads */
393 clib_atomic_fetch_add (vlib_worker_threads->workers_at_barrier, 1);
395 while (*vlib_worker_threads->wait_at_barrier)
398 clib_atomic_fetch_add (vlib_worker_threads->workers_at_barrier, -1);
403 vlib_worker_thread_bootstrap_fn (void *arg)
405 vlib_worker_thread_t *w = arg;
407 w->lwp = syscall (SYS_gettid);
408 w->thread_id = pthread_self ();
410 __os_thread_index = w - vlib_worker_threads;
414 void *frame_addr = __builtin_frame_address (0);
415 if (frame_addr < (void *) w->thread_stack ||
416 frame_addr > (void *) w->thread_stack + VLIB_THREAD_STACK_SIZE)
418 /* heap is not set yet */
419 fprintf (stderr, "thread stack is not set properly\n");
424 w->thread_function (arg);
430 vlib_get_thread_core_numa (vlib_worker_thread_t * w, unsigned cpu_id)
432 const char *sys_cpu_path = "/sys/devices/system/cpu/cpu";
433 const char *sys_node_path = "/sys/devices/system/node/node";
434 clib_bitmap_t *nbmp = 0, *cbmp = 0;
437 int core_id = -1, numa_id = -1;
439 p = format (p, "%s%u/topology/core_id%c", sys_cpu_path, cpu_id, 0);
440 clib_sysfs_read ((char *) p, "%d", &core_id);
441 vec_reset_length (p);
444 clib_sysfs_read ("/sys/devices/system/node/online", "%U",
445 unformat_bitmap_list, &nbmp);
446 clib_bitmap_foreach (node, nbmp) {
447 p = format (p, "%s%u/cpulist%c", sys_node_path, node, 0);
448 clib_sysfs_read ((char *) p, "%U", unformat_bitmap_list, &cbmp);
449 if (clib_bitmap_get (cbmp, cpu_id))
451 vec_reset_length (cbmp);
452 vec_reset_length (p);
459 w->core_id = core_id;
460 w->numa_id = numa_id;
463 static clib_error_t *
464 vlib_launch_thread_int (void *fp, vlib_worker_thread_t * w, unsigned cpu_id)
466 clib_mem_main_t *mm = &clib_mem_main;
467 vlib_thread_main_t *tm = &vlib_thread_main;
471 void *(*fp_arg) (void *) = fp;
475 vlib_get_thread_core_numa (w, cpu_id);
477 /* Set up NUMA-bound heap if indicated */
478 if (mm->per_numa_mheaps[w->numa_id] == 0)
480 /* If the user requested a NUMA heap, create it... */
481 if (tm->numa_heap_size)
483 clib_mem_set_numa_affinity (w->numa_id, 1 /* force */ );
484 numa_heap = clib_mem_create_heap (0 /* DIY */ , tm->numa_heap_size,
486 "numa %u heap", w->numa_id);
487 clib_mem_set_default_numa_affinity ();
488 mm->per_numa_mheaps[w->numa_id] = numa_heap;
492 /* Or, use the main heap */
493 mm->per_numa_mheaps[w->numa_id] = w->thread_mheap;
498 CPU_SET (cpu_id, &cpuset);
500 if (pthread_attr_init (&attr))
501 return clib_error_return_unix (0, "pthread_attr_init");
503 if (pthread_attr_setstack (&attr, w->thread_stack,
504 VLIB_THREAD_STACK_SIZE))
505 return clib_error_return_unix (0, "pthread_attr_setstack");
507 if (pthread_create (&worker, &attr, fp_arg, (void *) w))
508 return clib_error_return_unix (0, "pthread_create");
510 if (pthread_setaffinity_np (worker, sizeof (cpu_set_t), &cpuset))
511 return clib_error_return_unix (0, "pthread_setaffinity_np");
513 if (pthread_attr_destroy (&attr))
514 return clib_error_return_unix (0, "pthread_attr_destroy");
519 static clib_error_t *
520 start_workers (vlib_main_t * vm)
522 vlib_global_main_t *vgm = vlib_get_global_main ();
523 vlib_main_t *fvm = vlib_get_first_main ();
525 vlib_worker_thread_t *w;
526 vlib_main_t *vm_clone;
528 vlib_thread_main_t *tm = &vlib_thread_main;
529 vlib_thread_registration_t *tr;
530 vlib_node_runtime_t *rt;
531 u32 n_vlib_mains = tm->n_vlib_mains;
532 u32 worker_thread_index;
533 u32 stats_err_entry_index = fvm->error_main.stats_err_entry_index;
534 clib_mem_heap_t *main_heap = clib_mem_get_per_cpu_heap ();
535 vlib_stats_register_mem_heap (main_heap);
537 vec_reset_length (vlib_worker_threads);
539 /* Set up the main thread */
540 vec_add2_aligned (vlib_worker_threads, w, 1, CLIB_CACHE_LINE_BYTES);
541 w->elog_track.name = "main thread";
542 elog_track_register (vlib_get_elog_main (), &w->elog_track);
544 if (vec_len (tm->thread_prefix))
546 w->name = format (0, "%v_main%c", tm->thread_prefix, '\0');
547 vlib_set_thread_name ((char *) w->name);
550 vgm->elog_main.lock =
551 clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES, CLIB_CACHE_LINE_BYTES);
552 vgm->elog_main.lock[0] = 0;
554 clib_callback_data_init (&vm->vlib_node_runtime_perf_callbacks,
555 &vm->worker_thread_main_loop_callback_lock);
557 vec_validate_aligned (vgm->vlib_mains, n_vlib_mains - 1,
558 CLIB_CACHE_LINE_BYTES);
559 vec_set_len (vgm->vlib_mains, 0);
560 vec_add1_aligned (vgm->vlib_mains, vm, CLIB_CACHE_LINE_BYTES);
562 if (n_vlib_mains > 1)
564 vlib_worker_threads->wait_at_barrier =
565 clib_mem_alloc_aligned (sizeof (u32), CLIB_CACHE_LINE_BYTES);
566 vlib_worker_threads->workers_at_barrier =
567 clib_mem_alloc_aligned (sizeof (u32), CLIB_CACHE_LINE_BYTES);
569 vlib_worker_threads->node_reforks_required =
570 clib_mem_alloc_aligned (sizeof (u32), CLIB_CACHE_LINE_BYTES);
572 /* We'll need the rpc vector lock... */
573 clib_spinlock_init (&vm->pending_rpc_lock);
575 /* Ask for an initial barrier sync */
576 *vlib_worker_threads->workers_at_barrier = 0;
577 *vlib_worker_threads->wait_at_barrier = 1;
579 /* Without update or refork */
580 *vlib_worker_threads->node_reforks_required = 0;
581 vgm->need_vlib_worker_thread_node_runtime_update = 0;
584 vm->barrier_epoch = 0;
585 vm->barrier_no_close_before = 0;
587 worker_thread_index = 1;
588 clib_spinlock_init (&vm->worker_thread_main_loop_callback_lock);
590 for (i = 0; i < vec_len (tm->registrations); i++)
592 vlib_node_main_t *nm, *nm_clone;
595 tr = tm->registrations[i];
600 for (k = 0; k < tr->count; k++)
605 vec_add2 (vlib_worker_threads, w, 1);
606 /* Currently unused, may not really work */
608 w->thread_mheap = clib_mem_create_heap (0, tr->mheap_size,
613 w->thread_mheap = main_heap;
616 vlib_thread_stack_init (w - vlib_worker_threads);
617 w->thread_function = tr->function;
618 w->thread_function_arg = w;
620 w->registration = tr;
623 (char *) format (0, "%s %d", tr->name, k + 1);
624 vec_add1 (w->elog_track.name, 0);
625 elog_track_register (vlib_get_elog_main (), &w->elog_track);
627 if (tr->no_data_structure_clone)
630 /* Fork vlib_global_main et al. Look for bugs here */
631 oldheap = clib_mem_set_heap (w->thread_mheap);
633 vm_clone = clib_mem_alloc_aligned (sizeof (*vm_clone),
634 CLIB_CACHE_LINE_BYTES);
635 clib_memcpy (vm_clone, vlib_get_first_main (),
638 vm_clone->thread_index = worker_thread_index;
639 vm_clone->pending_rpc_requests = 0;
640 vec_validate (vm_clone->pending_rpc_requests, 0);
641 vec_set_len (vm_clone->pending_rpc_requests, 0);
642 clib_memset (&vm_clone->random_buffer, 0,
643 sizeof (vm_clone->random_buffer));
645 (&vm_clone->worker_thread_main_loop_callback_lock);
646 clib_callback_data_init
647 (&vm_clone->vlib_node_runtime_perf_callbacks,
648 &vm_clone->worker_thread_main_loop_callback_lock);
650 nm = &vlib_get_first_main ()->node_main;
651 nm_clone = &vm_clone->node_main;
652 /* fork next frames array, preserving node runtime indices */
653 nm_clone->next_frames = vec_dup_aligned (nm->next_frames,
654 CLIB_CACHE_LINE_BYTES);
655 for (j = 0; j < vec_len (nm_clone->next_frames); j++)
657 vlib_next_frame_t *nf = &nm_clone->next_frames[j];
658 u32 save_node_runtime_index;
661 save_node_runtime_index = nf->node_runtime_index;
662 save_flags = nf->flags & VLIB_FRAME_NO_FREE_AFTER_DISPATCH;
663 vlib_next_frame_init (nf);
664 nf->node_runtime_index = save_node_runtime_index;
665 nf->flags = save_flags;
668 /* fork the frame dispatch queue */
669 nm_clone->pending_frames = 0;
670 vec_validate (nm_clone->pending_frames, 10);
671 vec_set_len (nm_clone->pending_frames, 0);
676 /* Allocate all nodes in single block for speed */
677 n = clib_mem_alloc_no_fail (vec_len (nm->nodes) * sizeof (*n));
679 for (j = 0; j < vec_len (nm->nodes); j++)
681 clib_memcpy (n, nm->nodes[j], sizeof (*n));
682 /* none of the copied nodes have enqueue rights given out */
683 n->owner_node_index = VLIB_INVALID_NODE_INDEX;
684 clib_memset (&n->stats_total, 0, sizeof (n->stats_total));
685 clib_memset (&n->stats_last_clear, 0,
686 sizeof (n->stats_last_clear));
687 vec_add1 (nm_clone->nodes, n);
690 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL] =
691 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL],
692 CLIB_CACHE_LINE_BYTES);
694 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL])
696 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
697 /* copy initial runtime_data from node */
698 if (n->runtime_data && n->runtime_data_bytes > 0)
699 clib_memcpy (rt->runtime_data, n->runtime_data,
700 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
701 n->runtime_data_bytes));
704 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT] =
705 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_INPUT],
706 CLIB_CACHE_LINE_BYTES);
707 clib_interrupt_init (
708 &nm_clone->input_node_interrupts,
709 vec_len (nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT]));
710 clib_interrupt_init (
711 &nm_clone->pre_input_node_interrupts,
712 vec_len (nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT]));
713 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT])
715 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
716 /* copy initial runtime_data from node */
717 if (n->runtime_data && n->runtime_data_bytes > 0)
718 clib_memcpy (rt->runtime_data, n->runtime_data,
719 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
720 n->runtime_data_bytes));
723 nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT] =
724 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT],
725 CLIB_CACHE_LINE_BYTES);
727 nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT])
729 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
730 /* copy initial runtime_data from node */
731 if (n->runtime_data && n->runtime_data_bytes > 0)
732 clib_memcpy (rt->runtime_data, n->runtime_data,
733 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
734 n->runtime_data_bytes));
737 nm_clone->processes = vec_dup_aligned (nm->processes,
738 CLIB_CACHE_LINE_BYTES);
740 /* Create per-thread frame freelist */
741 nm_clone->frame_sizes = 0;
742 nm_clone->node_by_error = nm->node_by_error;
744 /* Packet trace buffers are guaranteed to be empty, nothing to do here */
746 clib_mem_set_heap (oldheap);
747 vec_add1_aligned (vgm->vlib_mains, vm_clone,
748 CLIB_CACHE_LINE_BYTES);
750 /* Switch to the stats segment ... */
751 vlib_stats_validate (stats_err_entry_index, worker_thread_index,
752 vec_len (fvm->error_main.counters) - 1);
753 c = vlib_stats_get_entry_data_pointer (stats_err_entry_index);
754 vm_clone->error_main.counters = c[worker_thread_index];
756 vm_clone->error_main.counters_last_clear = vec_dup_aligned (
757 vlib_get_first_main ()->error_main.counters_last_clear,
758 CLIB_CACHE_LINE_BYTES);
760 worker_thread_index++;
766 /* only have non-data-structure copy threads to create... */
767 for (i = 0; i < vec_len (tm->registrations); i++)
769 tr = tm->registrations[i];
771 for (j = 0; j < tr->count; j++)
773 vec_add2 (vlib_worker_threads, w, 1);
776 w->thread_mheap = clib_mem_create_heap (0, tr->mheap_size,
782 w->thread_mheap = main_heap;
784 vlib_thread_stack_init (w - vlib_worker_threads);
785 w->thread_function = tr->function;
786 w->thread_function_arg = w;
789 (char *) format (0, "%s %d", tr->name, j + 1);
790 w->registration = tr;
791 vec_add1 (w->elog_track.name, 0);
792 elog_track_register (vlib_get_elog_main (), &w->elog_track);
797 worker_thread_index = 1;
799 for (i = 0; i < vec_len (tm->registrations); i++)
804 tr = tm->registrations[i];
806 if (tr->use_pthreads || tm->use_pthreads)
808 for (j = 0; j < tr->count; j++)
811 w = vlib_worker_threads + worker_thread_index++;
812 err = vlib_launch_thread_int (vlib_worker_thread_bootstrap_fn,
815 clib_unix_error ("%U, thread %s init on cpu %d failed",
816 format_clib_error, err, tr->name, 0);
822 clib_bitmap_foreach (c, tr->coremask) {
823 w = vlib_worker_threads + worker_thread_index++;
824 err = vlib_launch_thread_int (vlib_worker_thread_bootstrap_fn,
827 clib_unix_error ("%U, thread %s init on cpu %d failed",
828 format_clib_error, err, tr->name, c);
832 vlib_worker_thread_barrier_sync (vm);
835 err = vlib_call_init_exit_functions (
836 vm, &vgm->num_workers_change_function_registrations, 1 /* call_once */,
839 clib_error_report (err);
841 vlib_worker_thread_barrier_release (vm);
845 VLIB_MAIN_LOOP_ENTER_FUNCTION (start_workers);
849 worker_thread_node_runtime_update_internal (void)
853 vlib_node_main_t *nm, *nm_clone;
854 vlib_main_t *vm_clone;
855 vlib_node_runtime_t *rt;
857 ASSERT (vlib_get_thread_index () == 0);
859 vm = vlib_get_first_main ();
862 ASSERT (*vlib_worker_threads->wait_at_barrier == 1);
865 * Scrape all runtime stats, so we don't lose node runtime(s) with
866 * pending counts, or throw away worker / io thread counts.
868 for (j = 0; j < vec_len (nm->nodes); j++)
872 vlib_node_sync_stats (vm, n);
875 for (i = 1; i < vlib_get_n_threads (); i++)
879 vm_clone = vlib_get_main_by_index (i);
880 nm_clone = &vm_clone->node_main;
882 for (j = 0; j < vec_len (nm_clone->nodes); j++)
884 n = nm_clone->nodes[j];
886 rt = vlib_node_get_runtime (vm_clone, n->index);
887 vlib_node_runtime_sync_stats (vm_clone, rt, 0, 0, 0);
891 /* Per-worker clone rebuilds are now done on each thread */
896 vlib_worker_thread_node_refork (void)
898 vlib_main_t *vm, *vm_clone;
899 vlib_node_main_t *nm, *nm_clone;
900 vlib_node_t **old_nodes_clone;
901 vlib_node_runtime_t *rt, *old_rt;
904 vlib_node_t *new_n_clone;
908 vm = vlib_get_first_main ();
910 vm_clone = vlib_get_main ();
911 nm_clone = &vm_clone->node_main;
913 /* Re-clone error heap */
914 u64 *old_counters_all_clear = vm_clone->error_main.counters_last_clear;
916 clib_memcpy_fast (&vm_clone->error_main, &vm->error_main,
917 sizeof (vm->error_main));
918 j = vec_len (vm->error_main.counters) - 1;
920 c = vlib_stats_get_entry_data_pointer (vm->error_main.stats_err_entry_index);
921 vm_clone->error_main.counters = c[vm_clone->thread_index];
923 vec_validate_aligned (old_counters_all_clear, j, CLIB_CACHE_LINE_BYTES);
924 vm_clone->error_main.counters_last_clear = old_counters_all_clear;
926 for (j = 0; j < vec_len (nm_clone->next_frames); j++)
928 vlib_next_frame_t *nf = &nm_clone->next_frames[j];
929 if ((nf->flags & VLIB_FRAME_IS_ALLOCATED) && nf->frame != NULL)
931 vlib_frame_t *f = nf->frame;
933 vlib_frame_free (vm_clone, f);
937 vec_free (nm_clone->next_frames);
938 nm_clone->next_frames = vec_dup_aligned (nm->next_frames,
939 CLIB_CACHE_LINE_BYTES);
941 for (j = 0; j < vec_len (nm_clone->next_frames); j++)
943 vlib_next_frame_t *nf = &nm_clone->next_frames[j];
944 u32 save_node_runtime_index;
947 save_node_runtime_index = nf->node_runtime_index;
948 save_flags = nf->flags & VLIB_FRAME_NO_FREE_AFTER_DISPATCH;
949 vlib_next_frame_init (nf);
950 nf->node_runtime_index = save_node_runtime_index;
951 nf->flags = save_flags;
954 old_nodes_clone = nm_clone->nodes;
959 /* Allocate all nodes in single block for speed */
961 clib_mem_alloc_no_fail (vec_len (nm->nodes) * sizeof (*new_n_clone));
962 for (j = 0; j < vec_len (nm->nodes); j++)
964 vlib_node_t *new_n = nm->nodes[j];
966 clib_memcpy_fast (new_n_clone, new_n, sizeof (*new_n));
967 /* none of the copied nodes have enqueue rights given out */
968 new_n_clone->owner_node_index = VLIB_INVALID_NODE_INDEX;
970 if (j >= vec_len (old_nodes_clone))
972 /* new node, set to zero */
973 clib_memset (&new_n_clone->stats_total, 0,
974 sizeof (new_n_clone->stats_total));
975 clib_memset (&new_n_clone->stats_last_clear, 0,
976 sizeof (new_n_clone->stats_last_clear));
980 vlib_node_t *old_n_clone = old_nodes_clone[j];
981 /* Copy stats if the old data is valid */
982 clib_memcpy_fast (&new_n_clone->stats_total,
983 &old_n_clone->stats_total,
984 sizeof (new_n_clone->stats_total));
985 clib_memcpy_fast (&new_n_clone->stats_last_clear,
986 &old_n_clone->stats_last_clear,
987 sizeof (new_n_clone->stats_last_clear));
989 /* keep previous node state */
990 new_n_clone->state = old_n_clone->state;
991 new_n_clone->flags = old_n_clone->flags;
993 vec_add1 (nm_clone->nodes, new_n_clone);
996 /* Free the old node clones */
997 clib_mem_free (old_nodes_clone[0]);
999 vec_free (old_nodes_clone);
1002 /* re-clone internal nodes */
1003 old_rt = nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL];
1004 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL] =
1005 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL],
1006 CLIB_CACHE_LINE_BYTES);
1008 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL])
1010 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
1011 /* copy runtime_data, will be overwritten later for existing rt */
1012 if (n->runtime_data && n->runtime_data_bytes > 0)
1013 clib_memcpy_fast (rt->runtime_data, n->runtime_data,
1014 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
1015 n->runtime_data_bytes));
1018 for (j = 0; j < vec_len (old_rt); j++)
1020 rt = vlib_node_get_runtime (vm_clone, old_rt[j].node_index);
1021 rt->state = old_rt[j].state;
1022 rt->flags = old_rt[j].flags;
1023 clib_memcpy_fast (rt->runtime_data, old_rt[j].runtime_data,
1024 VLIB_NODE_RUNTIME_DATA_SIZE);
1029 /* re-clone input nodes */
1030 old_rt = nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT];
1031 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT] =
1032 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_INPUT],
1033 CLIB_CACHE_LINE_BYTES);
1034 clib_interrupt_resize (
1035 &nm_clone->input_node_interrupts,
1036 vec_len (nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT]));
1037 clib_interrupt_resize (
1038 &nm_clone->pre_input_node_interrupts,
1039 vec_len (nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT]));
1041 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT])
1043 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
1044 /* copy runtime_data, will be overwritten later for existing rt */
1045 if (n->runtime_data && n->runtime_data_bytes > 0)
1046 clib_memcpy_fast (rt->runtime_data, n->runtime_data,
1047 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
1048 n->runtime_data_bytes));
1051 for (j = 0; j < vec_len (old_rt); j++)
1053 rt = vlib_node_get_runtime (vm_clone, old_rt[j].node_index);
1054 rt->state = old_rt[j].state;
1055 rt->flags = old_rt[j].flags;
1056 clib_memcpy_fast (rt->runtime_data, old_rt[j].runtime_data,
1057 VLIB_NODE_RUNTIME_DATA_SIZE);
1062 /* re-clone pre-input nodes */
1063 old_rt = nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT];
1064 nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT] =
1065 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT],
1066 CLIB_CACHE_LINE_BYTES);
1068 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT])
1070 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
1071 /* copy runtime_data, will be overwritten later for existing rt */
1072 if (n->runtime_data && n->runtime_data_bytes > 0)
1073 clib_memcpy_fast (rt->runtime_data, n->runtime_data,
1074 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
1075 n->runtime_data_bytes));
1078 for (j = 0; j < vec_len (old_rt); j++)
1080 rt = vlib_node_get_runtime (vm_clone, old_rt[j].node_index);
1081 rt->state = old_rt[j].state;
1082 rt->flags = old_rt[j].flags;
1083 clib_memcpy_fast (rt->runtime_data, old_rt[j].runtime_data,
1084 VLIB_NODE_RUNTIME_DATA_SIZE);
1089 vec_free (nm_clone->processes);
1090 nm_clone->processes = vec_dup_aligned (nm->processes,
1091 CLIB_CACHE_LINE_BYTES);
1092 nm_clone->node_by_error = nm->node_by_error;
1096 vlib_worker_thread_node_runtime_update (void)
1099 * Make a note that we need to do a node runtime update
1100 * prior to releasing the barrier.
1102 vlib_global_main.need_vlib_worker_thread_node_runtime_update = 1;
1106 unformat_sched_policy (unformat_input_t * input, va_list * args)
1108 u32 *r = va_arg (*args, u32 *);
1111 #define _(v,f,s) else if (unformat (input, s)) *r = SCHED_POLICY_##f;
1112 foreach_sched_policy
1119 static clib_error_t *
1120 cpu_config (vlib_main_t * vm, unformat_input_t * input)
1122 vlib_thread_registration_t *tr;
1124 vlib_thread_main_t *tm = &vlib_thread_main;
1129 tm->thread_registrations_by_name = hash_create_string (0, sizeof (uword));
1131 tm->n_thread_stacks = 1; /* account for main thread */
1132 tm->sched_policy = ~0;
1133 tm->sched_priority = ~0;
1134 tm->main_lcore = ~0;
1140 hash_set_mem (tm->thread_registrations_by_name, tr->name, (uword) tr);
1144 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1146 if (unformat (input, "use-pthreads"))
1147 tm->use_pthreads = 1;
1148 else if (unformat (input, "thread-prefix %v", &tm->thread_prefix))
1150 else if (unformat (input, "main-core %u", &tm->main_lcore))
1152 else if (unformat (input, "skip-cores %u", &tm->skip_cores))
1154 else if (unformat (input, "numa-heap-size %U",
1155 unformat_memory_size, &tm->numa_heap_size))
1157 else if (unformat (input, "coremask-%s %U", &name,
1158 unformat_bitmap_mask, &bitmap) ||
1159 unformat (input, "corelist-%s %U", &name,
1160 unformat_bitmap_list, &bitmap))
1162 p = hash_get_mem (tm->thread_registrations_by_name, name);
1164 return clib_error_return (0, "no such thread type '%s'", name);
1166 tr = (vlib_thread_registration_t *) p[0];
1168 if (tr->use_pthreads)
1169 return clib_error_return (0,
1170 "corelist cannot be set for '%s' threads",
1173 return clib_error_return
1174 (0, "core placement of '%s' threads is already configured",
1177 tr->coremask = bitmap;
1178 tr->count = clib_bitmap_count_set_bits (tr->coremask);
1182 (input, "scheduler-policy %U", unformat_sched_policy,
1185 else if (unformat (input, "scheduler-priority %u", &tm->sched_priority))
1187 else if (unformat (input, "%s %u", &name, &count))
1189 p = hash_get_mem (tm->thread_registrations_by_name, name);
1191 return clib_error_return (0, "no such thread type 3 '%s'", name);
1193 tr = (vlib_thread_registration_t *) p[0];
1195 if (tr->fixed_count)
1196 return clib_error_return
1197 (0, "number of '%s' threads not configurable", name);
1199 return clib_error_return
1200 (0, "number of '%s' threads is already configured", name);
1208 if (tm->sched_priority != ~0)
1210 if (tm->sched_policy == SCHED_FIFO || tm->sched_policy == SCHED_RR)
1212 u32 prio_max = sched_get_priority_max (tm->sched_policy);
1213 u32 prio_min = sched_get_priority_min (tm->sched_policy);
1214 if (tm->sched_priority > prio_max)
1215 tm->sched_priority = prio_max;
1216 if (tm->sched_priority < prio_min)
1217 tm->sched_priority = prio_min;
1221 return clib_error_return
1223 "scheduling priority (%d) is not allowed for `normal` scheduling policy",
1224 tm->sched_priority);
1229 if (!tm->thread_prefix)
1230 tm->thread_prefix = format (0, "vpp");
1234 tm->n_thread_stacks += tr->count;
1235 tm->n_pthreads += tr->count * tr->use_pthreads;
1236 tm->n_threads += tr->count * (tr->use_pthreads == 0);
1243 VLIB_EARLY_CONFIG_FUNCTION (cpu_config, "cpu");
1246 * Enforce minimum open time to minimize packet loss due to Rx overflow,
1247 * based on a test based heuristic that barrier should be open for at least
1248 * 3 time as long as it is closed (with an upper bound of 1ms because by that
1249 * point it is probably too late to make a difference)
1252 #ifndef BARRIER_MINIMUM_OPEN_LIMIT
1253 #define BARRIER_MINIMUM_OPEN_LIMIT 0.001
1256 #ifndef BARRIER_MINIMUM_OPEN_FACTOR
1257 #define BARRIER_MINIMUM_OPEN_FACTOR 3
1261 vlib_worker_thread_initial_barrier_sync_and_release (vlib_main_t * vm)
1264 f64 now = vlib_time_now (vm);
1265 u32 count = vlib_get_n_threads () - 1;
1267 /* No worker threads? */
1271 deadline = now + BARRIER_SYNC_TIMEOUT;
1272 *vlib_worker_threads->wait_at_barrier = 1;
1273 while (*vlib_worker_threads->workers_at_barrier != count)
1275 if ((now = vlib_time_now (vm)) > deadline)
1277 fformat (stderr, "%s: worker thread deadlock\n", __FUNCTION__);
1282 *vlib_worker_threads->wait_at_barrier = 0;
1286 * Return true if the wroker thread barrier is held
1289 vlib_worker_thread_barrier_held (void)
1291 if (vlib_get_n_threads () < 2)
1294 return (*vlib_worker_threads->wait_at_barrier == 1);
1298 vlib_worker_thread_barrier_sync_int (vlib_main_t * vm, const char *func_name)
1305 f64 max_vector_rate;
1309 if (vlib_get_n_threads () < 2)
1312 ASSERT (vlib_get_thread_index () == 0);
1314 vlib_worker_threads[0].barrier_caller = func_name;
1315 count = vlib_get_n_threads () - 1;
1317 /* Record entry relative to last close */
1318 now = vlib_time_now (vm);
1319 t_entry = now - vm->barrier_epoch;
1321 /* Tolerate recursive calls */
1322 if (++vlib_worker_threads[0].recursion_level > 1)
1324 barrier_trace_sync_rec (t_entry);
1328 if (PREDICT_FALSE (vec_len (vm->barrier_perf_callbacks) != 0))
1329 clib_call_callbacks (vm->barrier_perf_callbacks, vm,
1330 vm->clib_time.last_cpu_time, 0 /* enter */ );
1333 * Need data to decide if we're working hard enough to honor
1334 * the barrier hold-down timer.
1336 max_vector_rate = 0.0;
1337 for (i = 1; i < vlib_get_n_threads (); i++)
1339 vlib_main_t *ovm = vlib_get_main_by_index (i);
1340 max_vector_rate = clib_max (max_vector_rate,
1341 (f64) vlib_last_vectors_per_main_loop (ovm));
1344 vlib_worker_threads[0].barrier_sync_count++;
1346 /* Enforce minimum barrier open time to minimize packet loss */
1347 ASSERT (vm->barrier_no_close_before <= (now + BARRIER_MINIMUM_OPEN_LIMIT));
1350 * If any worker thread seems busy, which we define
1351 * as a vector rate above 10, we enforce the barrier hold-down timer
1353 if (max_vector_rate > 10.0)
1357 now = vlib_time_now (vm);
1358 /* Barrier hold-down timer expired? */
1359 if (now >= vm->barrier_no_close_before)
1361 if ((vm->barrier_no_close_before - now)
1362 > (2.0 * BARRIER_MINIMUM_OPEN_LIMIT))
1365 ("clock change: would have waited for %.4f seconds",
1366 (vm->barrier_no_close_before - now));
1371 /* Record time of closure */
1372 t_open = now - vm->barrier_epoch;
1373 vm->barrier_epoch = now;
1375 deadline = now + BARRIER_SYNC_TIMEOUT;
1377 *vlib_worker_threads->wait_at_barrier = 1;
1378 while (*vlib_worker_threads->workers_at_barrier != count)
1380 if ((now = vlib_time_now (vm)) > deadline)
1382 fformat (stderr, "%s: worker thread deadlock\n", __FUNCTION__);
1387 t_closed = now - vm->barrier_epoch;
1389 barrier_trace_sync (t_entry, t_open, t_closed);
1394 vlib_worker_thread_barrier_release (vlib_main_t * vm)
1396 vlib_global_main_t *vgm = vlib_get_global_main ();
1402 f64 t_update_main = 0.0;
1403 int refork_needed = 0;
1405 if (vlib_get_n_threads () < 2)
1408 ASSERT (vlib_get_thread_index () == 0);
1411 now = vlib_time_now (vm);
1412 t_entry = now - vm->barrier_epoch;
1414 if (--vlib_worker_threads[0].recursion_level > 0)
1416 barrier_trace_release_rec (t_entry);
1420 /* Update (all) node runtimes before releasing the barrier, if needed */
1421 if (vgm->need_vlib_worker_thread_node_runtime_update)
1424 * Lock stat segment here, so we's safe when
1425 * rebuilding the stat segment node clones from the
1428 vlib_stats_segment_lock ();
1430 /* Do stats elements on main thread */
1431 worker_thread_node_runtime_update_internal ();
1432 vgm->need_vlib_worker_thread_node_runtime_update = 0;
1434 /* Do per thread rebuilds in parallel */
1436 clib_atomic_fetch_add (vlib_worker_threads->node_reforks_required,
1437 (vlib_get_n_threads () - 1));
1438 now = vlib_time_now (vm);
1439 t_update_main = now - vm->barrier_epoch;
1442 deadline = now + BARRIER_SYNC_TIMEOUT;
1445 * Note when we let go of the barrier.
1446 * Workers can use this to derive a reasonably accurate
1447 * time offset. See vlib_time_now(...)
1449 vm->time_last_barrier_release = vlib_time_now (vm);
1450 CLIB_MEMORY_STORE_BARRIER ();
1452 *vlib_worker_threads->wait_at_barrier = 0;
1454 while (*vlib_worker_threads->workers_at_barrier > 0)
1456 if ((now = vlib_time_now (vm)) > deadline)
1458 fformat (stderr, "%s: worker thread deadlock\n", __FUNCTION__);
1463 /* Wait for reforks before continuing */
1466 now = vlib_time_now (vm);
1468 deadline = now + BARRIER_SYNC_TIMEOUT;
1470 while (*vlib_worker_threads->node_reforks_required > 0)
1472 if ((now = vlib_time_now (vm)) > deadline)
1474 fformat (stderr, "%s: worker thread refork deadlock\n",
1479 vlib_stats_segment_unlock ();
1482 t_closed_total = now - vm->barrier_epoch;
1484 minimum_open = t_closed_total * BARRIER_MINIMUM_OPEN_FACTOR;
1486 if (minimum_open > BARRIER_MINIMUM_OPEN_LIMIT)
1488 minimum_open = BARRIER_MINIMUM_OPEN_LIMIT;
1491 vm->barrier_no_close_before = now + minimum_open;
1493 /* Record barrier epoch (used to enforce minimum open time) */
1494 vm->barrier_epoch = now;
1496 barrier_trace_release (t_entry, t_closed_total, t_update_main);
1498 if (PREDICT_FALSE (vec_len (vm->barrier_perf_callbacks) != 0))
1499 clib_call_callbacks (vm->barrier_perf_callbacks, vm,
1500 vm->clib_time.last_cpu_time, 1 /* leave */ );
1504 vlib_worker_sync_rpc (void *args)
1506 ASSERT (vlib_thread_is_main_w_barrier ());
1507 vlib_worker_threads->wait_before_barrier = 0;
1511 vlib_workers_sync (void)
1513 if (PREDICT_FALSE (!vlib_num_workers ()))
1516 if (!(*vlib_worker_threads->wait_at_barrier) &&
1517 !clib_atomic_swap_rel_n (&vlib_worker_threads->wait_before_barrier, 1))
1519 u32 thread_index = vlib_get_thread_index ();
1520 vlib_rpc_call_main_thread (vlib_worker_sync_rpc, (u8 *) &thread_index,
1521 sizeof (thread_index));
1524 /* Wait until main thread asks for barrier */
1525 while (!(*vlib_worker_threads->wait_at_barrier))
1528 /* Stop before barrier and make sure all threads are either
1529 * at worker barrier or the barrier before it */
1530 clib_atomic_fetch_add (&vlib_worker_threads->workers_before_barrier, 1);
1531 while (vlib_num_workers () > (*vlib_worker_threads->workers_at_barrier +
1532 vlib_worker_threads->workers_before_barrier))
1537 vlib_workers_continue (void)
1539 if (PREDICT_FALSE (!vlib_num_workers ()))
1542 clib_atomic_fetch_add (&vlib_worker_threads->done_work_before_barrier, 1);
1544 /* Wait until all workers are done with work before barrier */
1545 while (vlib_worker_threads->done_work_before_barrier <
1546 vlib_worker_threads->workers_before_barrier)
1549 clib_atomic_fetch_add (&vlib_worker_threads->done_work_before_barrier, -1);
1550 clib_atomic_fetch_add (&vlib_worker_threads->workers_before_barrier, -1);
1554 * Wait until each of the workers has been once around the track
1557 vlib_worker_wait_one_loop (void)
1559 vlib_global_main_t *vgm = vlib_get_global_main ();
1560 ASSERT (vlib_get_thread_index () == 0);
1562 if (vlib_get_n_threads () < 2)
1565 if (vlib_worker_thread_barrier_held ())
1571 vec_validate (counts, vlib_get_n_threads () - 1);
1573 /* record the current loop counts */
1574 vec_foreach_index (ii, vgm->vlib_mains)
1575 counts[ii] = vgm->vlib_mains[ii]->main_loop_count;
1577 /* spin until each changes, apart from the main thread, or we'd be
1579 for (ii = 1; ii < vec_len (counts); ii++)
1581 while (counts[ii] == vgm->vlib_mains[ii]->main_loop_count)
1590 vlib_worker_thread_fn (void *arg)
1592 vlib_global_main_t *vgm = vlib_get_global_main ();
1593 vlib_worker_thread_t *w = (vlib_worker_thread_t *) arg;
1594 vlib_main_t *vm = vlib_get_main ();
1597 ASSERT (vm->thread_index == vlib_get_thread_index ());
1599 vlib_worker_thread_init (w);
1600 clib_time_init (&vm->clib_time);
1601 clib_mem_set_heap (w->thread_mheap);
1603 vm->worker_init_functions_called = hash_create (0, 0);
1605 e = vlib_call_init_exit_functions_no_sort (
1606 vm, &vgm->worker_init_function_registrations, 1 /* call_once */,
1609 clib_error_report (e);
1611 vlib_worker_loop (vm);
1615 VLIB_REGISTER_THREAD (worker_thread_reg, static) = {
1618 .function = vlib_worker_thread_fn,
1622 extern clib_march_fn_registration
1623 *vlib_frame_queue_dequeue_with_aux_fn_march_fn_registrations;
1624 extern clib_march_fn_registration
1625 *vlib_frame_queue_dequeue_fn_march_fn_registrations;
1627 vlib_frame_queue_main_init (u32 node_index, u32 frame_queue_nelts)
1629 vlib_thread_main_t *tm = vlib_get_thread_main ();
1630 vlib_main_t *vm = vlib_get_main ();
1631 vlib_frame_queue_main_t *fqm;
1632 vlib_frame_queue_t *fq;
1637 if (frame_queue_nelts == 0)
1638 frame_queue_nelts = FRAME_QUEUE_MAX_NELTS;
1640 num_threads = 1 /* main thread */ + tm->n_threads;
1641 ASSERT (frame_queue_nelts >= 8 + num_threads);
1643 vec_add2 (tm->frame_queue_mains, fqm, 1);
1645 node = vlib_get_node (vm, fqm->node_index);
1647 if (node->aux_offset)
1649 fqm->frame_queue_dequeue_fn =
1650 CLIB_MARCH_FN_VOID_POINTER (vlib_frame_queue_dequeue_with_aux_fn);
1654 fqm->frame_queue_dequeue_fn =
1655 CLIB_MARCH_FN_VOID_POINTER (vlib_frame_queue_dequeue_fn);
1658 fqm->node_index = node_index;
1659 fqm->frame_queue_nelts = frame_queue_nelts;
1661 vec_validate (fqm->vlib_frame_queues, tm->n_vlib_mains - 1);
1662 vec_set_len (fqm->vlib_frame_queues, 0);
1663 for (i = 0; i < tm->n_vlib_mains; i++)
1665 fq = vlib_frame_queue_alloc (frame_queue_nelts);
1666 vec_add1 (fqm->vlib_frame_queues, fq);
1669 return (fqm - tm->frame_queue_mains);
1673 vlib_process_signal_event_mt_helper (vlib_process_signal_event_mt_args_t *
1676 ASSERT (vlib_get_thread_index () == 0);
1677 vlib_process_signal_event (vlib_get_main (), args->node_index,
1678 args->type_opaque, args->data);
1681 void *rpc_call_main_thread_cb_fn;
1684 vlib_rpc_call_main_thread (void *callback, u8 * args, u32 arg_size)
1686 if (rpc_call_main_thread_cb_fn)
1688 void (*fp) (void *, u8 *, u32) = rpc_call_main_thread_cb_fn;
1689 (*fp) (callback, args, arg_size);
1692 clib_warning ("BUG: rpc_call_main_thread_cb_fn NULL!");
1696 threads_init (vlib_main_t * vm)
1698 const vlib_thread_main_t *tm = vlib_get_thread_main ();
1700 if (tm->main_lcore == ~0 && tm->n_vlib_mains > 1)
1701 return clib_error_return (0, "Configuration error, a main core must "
1702 "be specified when using worker threads");
1707 VLIB_INIT_FUNCTION (threads_init);
1709 static clib_error_t *
1710 show_clock_command_fn (vlib_main_t * vm,
1711 unformat_input_t * input, vlib_cli_command_t * cmd)
1714 clib_timebase_t _tb, *tb = &_tb;
1716 (void) unformat (input, "verbose %=", &verbose, 1);
1718 clib_timebase_init (tb, 0 /* GMT */ , CLIB_TIMEBASE_DAYLIGHT_NONE,
1721 vlib_cli_output (vm, "%U, %U GMT", format_clib_time, &vm->clib_time,
1722 verbose, format_clib_timebase_time,
1723 clib_timebase_now (tb));
1725 vlib_cli_output (vm, "Time last barrier release %.9f",
1726 vm->time_last_barrier_release);
1728 foreach_vlib_main ()
1730 vlib_cli_output (vm, "%d: %U", this_vlib_main->thread_index,
1731 format_clib_time, &this_vlib_main->clib_time, verbose);
1733 vlib_cli_output (vm, "Thread %d offset %.9f error %.9f",
1734 this_vlib_main->thread_index,
1735 this_vlib_main->time_offset,
1736 vm->time_last_barrier_release -
1737 this_vlib_main->time_last_barrier_release);
1743 VLIB_CLI_COMMAND (f_command, static) =
1745 .path = "show clock",
1746 .short_help = "show clock",
1747 .function = show_clock_command_fn,
1751 vlib_thread_main_t *
1752 vlib_get_thread_main_not_inline (void)
1754 return vlib_get_thread_main ();
1758 * fd.io coding-style-patch-verification: ON
1761 * eval: (c-set-style "gnu")