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.
20 #include <pthread_np.h>
21 #endif /* __FreeBSD__ */
22 #include <vppinfra/format.h>
23 #include <vppinfra/time_range.h>
24 #include <vppinfra/interrupt.h>
25 #include <vppinfra/bitmap.h>
26 #include <vppinfra/unix.h>
27 #include <vlib/vlib.h>
29 #include <vlib/threads.h>
31 #include <vlib/stats/stats.h>
39 vlib_worker_thread_t *vlib_worker_threads;
40 vlib_thread_main_t vlib_thread_main;
43 * Barrier tracing can be enabled on a normal build to collect information
44 * on barrier use, including timings and call stacks. Deliberately not
45 * keyed off CLIB_DEBUG, because that can add significant overhead which
46 * imapacts observed timings.
50 barrier_trace_sync (f64 t_entry, f64 t_open, f64 t_closed)
52 if (!vlib_worker_threads->barrier_elog_enabled)
55 ELOG_TYPE_DECLARE (e) = {
56 .format = "bar-trace-%s-#%d",
57 .format_args = "T4i4",
62 u32 caller, count, t_entry, t_open, t_closed;
65 ed = ELOG_DATA (&vlib_global_main.elog_main, e);
66 ed->count = (int) vlib_worker_threads[0].barrier_sync_count;
67 ed->caller = elog_string (&vlib_global_main.elog_main,
68 (char *) vlib_worker_threads[0].barrier_caller);
69 ed->t_entry = (int) (1000000.0 * t_entry);
70 ed->t_open = (int) (1000000.0 * t_open);
71 ed->t_closed = (int) (1000000.0 * t_closed);
75 barrier_trace_sync_rec (f64 t_entry)
77 if (!vlib_worker_threads->barrier_elog_enabled)
80 ELOG_TYPE_DECLARE (e) = {
81 .format = "bar-syncrec-%s-#%d",
82 .format_args = "T4i4",
90 ed = ELOG_DATA (&vlib_global_main.elog_main, e);
91 ed->depth = (int) vlib_worker_threads[0].recursion_level - 1;
92 ed->caller = elog_string (&vlib_global_main.elog_main,
93 (char *) vlib_worker_threads[0].barrier_caller);
97 barrier_trace_release_rec (f64 t_entry)
99 if (!vlib_worker_threads->barrier_elog_enabled)
102 ELOG_TYPE_DECLARE (e) = {
103 .format = "bar-relrrec-#%d",
112 ed = ELOG_DATA (&vlib_global_main.elog_main, e);
113 ed->depth = (int) vlib_worker_threads[0].recursion_level;
117 barrier_trace_release (f64 t_entry, f64 t_closed_total, f64 t_update_main)
119 if (!vlib_worker_threads->barrier_elog_enabled)
122 ELOG_TYPE_DECLARE (e) = {
123 .format = "bar-rel-#%d-e%d-u%d-t%d",
124 .format_args = "i4i4i4i4",
129 u32 count, t_entry, t_update_main, t_closed_total;
132 ed = ELOG_DATA (&vlib_global_main.elog_main, e);
133 ed->t_entry = (int) (1000000.0 * t_entry);
134 ed->t_update_main = (int) (1000000.0 * t_update_main);
135 ed->t_closed_total = (int) (1000000.0 * t_closed_total);
136 ed->count = (int) vlib_worker_threads[0].barrier_sync_count;
138 /* Reset context for next trace */
139 vlib_worker_threads[0].barrier_context = NULL;
143 os_get_nthreads (void)
145 return vec_len (vlib_thread_stacks);
149 vlib_set_thread_name (char *name)
151 int pthread_setname_np (pthread_t __target_thread, const char *__name);
153 pthread_t thread = pthread_self ();
157 rv = pthread_setname_np (thread, name);
159 clib_warning ("pthread_setname_np returned %d", rv);
164 sort_registrations_by_no_clone (void *a0, void *a1)
166 vlib_thread_registration_t **tr0 = a0;
167 vlib_thread_registration_t **tr1 = a1;
169 return ((i32) ((*tr0)->no_data_structure_clone)
170 - ((i32) ((*tr1)->no_data_structure_clone)));
174 /* Called early in the init sequence */
177 vlib_thread_init (vlib_main_t * vm)
179 vlib_thread_main_t *tm = &vlib_thread_main;
180 vlib_worker_thread_t *w;
181 vlib_thread_registration_t *tr;
182 u32 n_vlib_mains = 1;
186 u32 stats_num_worker_threads_dir_index;
188 stats_num_worker_threads_dir_index =
189 vlib_stats_add_gauge ("/sys/num_worker_threads");
190 ASSERT (stats_num_worker_threads_dir_index != ~0);
192 /* get bitmaps of active cpu cores and sockets */
193 tm->cpu_core_bitmap = os_get_online_cpu_core_bitmap ();
194 tm->cpu_socket_bitmap = os_get_online_cpu_node_bitmap ();
196 avail_cpu = clib_bitmap_dup (tm->cpu_core_bitmap);
199 for (i = 0; i < tm->skip_cores; i++)
201 uword c = clib_bitmap_first_set (avail_cpu);
203 return clib_error_return (0, "no available cpus to skip");
205 avail_cpu = clib_bitmap_set (avail_cpu, c, 0);
208 /* if main thread affinity is unspecified, set to current running cpu */
209 if (tm->main_lcore == ~0)
210 tm->main_lcore = sched_getcpu ();
212 /* grab cpu for main thread */
213 if (tm->main_lcore != ~0)
215 if (clib_bitmap_get (avail_cpu, tm->main_lcore) == 0)
216 return clib_error_return (0, "cpu %u is not available to be used"
217 " for the main thread", tm->main_lcore);
218 avail_cpu = clib_bitmap_set (avail_cpu, tm->main_lcore, 0);
221 /* assume that there is socket 0 only if there is no data from sysfs */
222 if (!tm->cpu_socket_bitmap)
223 tm->cpu_socket_bitmap = clib_bitmap_set (0, 0, 1);
225 /* pin main thread to main_lcore */
226 if (tm->main_lcore != ~0)
230 CPU_SET (tm->main_lcore, &cpuset);
231 if (pthread_setaffinity_np (pthread_self (), sizeof (cpu_set_t),
234 return clib_error_return (0, "could not pin main thread to cpu %u",
239 /* Set up thread 0 */
240 vec_validate_aligned (vlib_worker_threads, 0, CLIB_CACHE_LINE_BYTES);
241 vec_set_len (vlib_worker_threads, 1);
242 w = vlib_worker_threads;
243 w->thread_mheap = clib_mem_get_heap ();
244 w->thread_stack = vlib_thread_stacks[0];
245 w->cpu_id = tm->main_lcore;
247 w->lwp = pthread_getthreadid_np ();
249 w->lwp = syscall (SYS_gettid);
250 #endif /* __FreeBSD__ */
251 w->thread_id = pthread_self ();
252 tm->n_vlib_mains = 1;
254 vlib_get_thread_core_numa (w, w->cpu_id);
256 if (tm->sched_policy != ~0)
258 struct sched_param sched_param;
259 if (!sched_getparam (w->lwp, &sched_param))
261 if (tm->sched_priority != ~0)
262 sched_param.sched_priority = tm->sched_priority;
263 sched_setscheduler (w->lwp, tm->sched_policy, &sched_param);
267 /* assign threads to cores and set n_vlib_mains */
272 vec_add1 (tm->registrations, tr);
276 vec_sort_with_function (tm->registrations, sort_registrations_by_no_clone);
278 for (i = 0; i < vec_len (tm->registrations); i++)
281 tr = tm->registrations[i];
282 tr->first_index = first_index;
283 first_index += tr->count;
284 n_vlib_mains += (tr->no_data_structure_clone == 0) ? tr->count : 0;
286 /* construct coremask */
287 if (tr->use_pthreads || !tr->count)
293 clib_bitmap_foreach (c, tr->coremask) {
294 if (clib_bitmap_get(avail_cpu, c) == 0)
295 return clib_error_return (0, "cpu %u is not available to be used"
296 " for the '%s' thread",c, tr->name);
298 avail_cpu = clib_bitmap_set(avail_cpu, c, 0);
303 for (j = 0; j < tr->count; j++)
305 /* Do not use CPU 0 by default - leave it to the host and IRQs */
306 uword avail_c0 = clib_bitmap_get (avail_cpu, 0);
307 avail_cpu = clib_bitmap_set (avail_cpu, 0, 0);
309 uword c = clib_bitmap_first_set (avail_cpu);
310 /* Use CPU 0 as a last resort */
311 if (c == ~0 && avail_c0)
318 return clib_error_return (0,
319 "no available cpus to be used for"
320 " the '%s' thread #%u",
321 tr->name, tr->count);
323 avail_cpu = clib_bitmap_set (avail_cpu, 0, avail_c0);
324 avail_cpu = clib_bitmap_set (avail_cpu, c, 0);
325 tr->coremask = clib_bitmap_set (tr->coremask, c, 1);
330 clib_bitmap_free (avail_cpu);
332 tm->n_vlib_mains = n_vlib_mains;
333 vlib_stats_set_gauge (stats_num_worker_threads_dir_index, n_vlib_mains - 1);
336 * Allocate the remaining worker threads, and thread stack vector slots
337 * from now on, calls to os_get_nthreads() will return the correct
340 vec_validate_aligned (vlib_worker_threads, first_index - 1,
341 CLIB_CACHE_LINE_BYTES);
342 vec_validate (vlib_thread_stacks, vec_len (vlib_worker_threads) - 1);
347 vlib_frame_queue_alloc (int nelts)
349 vlib_frame_queue_t *fq;
351 fq = clib_mem_alloc_aligned (sizeof (*fq), CLIB_CACHE_LINE_BYTES);
352 clib_memset (fq, 0, sizeof (*fq));
354 fq->vector_threshold = 2 * VLIB_FRAME_SIZE;
355 vec_validate_aligned (fq->elts, nelts - 1, CLIB_CACHE_LINE_BYTES);
357 if (nelts & (nelts - 1))
359 fformat (stderr, "FATAL: nelts MUST be a power of 2\n");
366 void vl_msg_api_handler_no_free (void *) __attribute__ ((weak));
368 vl_msg_api_handler_no_free (void *v)
372 /* To be called by vlib worker threads upon startup */
374 vlib_worker_thread_init (vlib_worker_thread_t * w)
376 vlib_thread_main_t *tm = vlib_get_thread_main ();
381 * Note: disabling signals in worker threads as follows
382 * prevents the api post-mortem dump scheme from working
386 * pthread_sigmask (SIG_SETMASK, &s, 0);
388 * We can still disable signals for SIGINT,SIGHUP and SIGTERM as they don't
389 * trigger post-dump handlers anyway.
391 sigemptyset (&signals);
392 sigaddset (&signals, SIGINT);
393 sigaddset (&signals, SIGHUP);
394 sigaddset (&signals, SIGTERM);
395 rv = pthread_sigmask (SIG_BLOCK, &signals, NULL);
398 clib_warning ("Failed to set the worker signal mask");
400 clib_mem_set_heap (w->thread_mheap);
402 if (vec_len (tm->thread_prefix) && w->registration->short_name)
404 w->name = format (0, "%v_%s_%d%c", tm->thread_prefix,
405 w->registration->short_name, w->instance_id, '\0');
406 vlib_set_thread_name ((char *) w->name);
409 if (!w->registration->use_pthreads)
412 /* Initial barrier sync, for both worker and i/o threads */
413 clib_atomic_fetch_add (vlib_worker_threads->workers_at_barrier, 1);
415 while (*vlib_worker_threads->wait_at_barrier)
418 clib_atomic_fetch_add (vlib_worker_threads->workers_at_barrier, -1);
423 vlib_worker_thread_bootstrap_fn (void *arg)
425 vlib_worker_thread_t *w = arg;
428 w->lwp = pthread_getthreadid_np ();
430 w->lwp = syscall (SYS_gettid);
431 #endif /* __FreeBSD__ */
432 w->thread_id = pthread_self ();
434 __os_thread_index = w - vlib_worker_threads;
438 void *frame_addr = __builtin_frame_address (0);
439 if (frame_addr < (void *) w->thread_stack ||
440 frame_addr > (void *) w->thread_stack + VLIB_THREAD_STACK_SIZE)
442 /* heap is not set yet */
443 fprintf (stderr, "thread stack is not set properly\n");
448 w->thread_function (arg);
454 vlib_get_thread_core_numa (vlib_worker_thread_t * w, unsigned cpu_id)
456 clib_bitmap_t *nbmp = 0, *cbmp = 0;
457 int node, core_id = -1, numa_id = -1;
459 core_id = os_get_cpu_phys_core_id (cpu_id);
460 nbmp = os_get_online_cpu_node_bitmap ();
462 clib_bitmap_foreach (node, nbmp) {
463 cbmp = os_get_cpu_on_node_bitmap (node);
464 if (clib_bitmap_get (cbmp, cpu_id))
466 vec_reset_length (cbmp);
472 w->core_id = core_id;
473 w->numa_id = numa_id;
476 static clib_error_t *
477 vlib_launch_thread_int (void *fp, vlib_worker_thread_t * w, unsigned cpu_id)
479 clib_mem_main_t *mm = &clib_mem_main;
480 vlib_thread_main_t *tm = &vlib_thread_main;
484 void *(*fp_arg) (void *) = fp;
488 vlib_get_thread_core_numa (w, cpu_id);
490 /* Set up NUMA-bound heap if indicated */
491 if (mm->per_numa_mheaps[w->numa_id] == 0)
493 /* If the user requested a NUMA heap, create it... */
494 if (tm->numa_heap_size)
496 clib_mem_set_numa_affinity (w->numa_id, 1 /* force */ );
497 numa_heap = clib_mem_create_heap (0 /* DIY */ , tm->numa_heap_size,
499 "numa %u heap", w->numa_id);
500 clib_mem_set_default_numa_affinity ();
501 mm->per_numa_mheaps[w->numa_id] = numa_heap;
505 /* Or, use the main heap */
506 mm->per_numa_mheaps[w->numa_id] = w->thread_mheap;
511 CPU_SET (cpu_id, &cpuset);
513 if (pthread_attr_init (&attr))
514 return clib_error_return_unix (0, "pthread_attr_init");
516 if (pthread_attr_setstack (&attr, w->thread_stack,
517 VLIB_THREAD_STACK_SIZE))
518 return clib_error_return_unix (0, "pthread_attr_setstack");
520 if (pthread_create (&worker, &attr, fp_arg, (void *) w))
521 return clib_error_return_unix (0, "pthread_create");
523 if (pthread_setaffinity_np (worker, sizeof (cpu_set_t), &cpuset))
524 return clib_error_return_unix (0, "pthread_setaffinity_np");
526 if (pthread_attr_destroy (&attr))
527 return clib_error_return_unix (0, "pthread_attr_destroy");
532 static clib_error_t *
533 start_workers (vlib_main_t * vm)
535 vlib_global_main_t *vgm = vlib_get_global_main ();
536 vlib_main_t *fvm = vlib_get_first_main ();
538 vlib_worker_thread_t *w;
539 vlib_main_t *vm_clone;
541 vlib_thread_main_t *tm = &vlib_thread_main;
542 vlib_thread_registration_t *tr;
543 vlib_node_runtime_t *rt;
544 u32 n_vlib_mains = tm->n_vlib_mains;
545 u32 worker_thread_index;
546 u32 stats_err_entry_index = fvm->error_main.stats_err_entry_index;
547 clib_mem_heap_t *main_heap = clib_mem_get_per_cpu_heap ();
548 vlib_stats_register_mem_heap (main_heap);
550 vec_reset_length (vlib_worker_threads);
552 /* Set up the main thread */
553 vec_add2_aligned (vlib_worker_threads, w, 1, CLIB_CACHE_LINE_BYTES);
554 w->elog_track.name = "main thread";
555 elog_track_register (vlib_get_elog_main (), &w->elog_track);
557 if (vec_len (tm->thread_prefix))
559 w->name = format (0, "%v_main%c", tm->thread_prefix, '\0');
560 vlib_set_thread_name ((char *) w->name);
563 vgm->elog_main.lock =
564 clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES, CLIB_CACHE_LINE_BYTES);
565 vgm->elog_main.lock[0] = 0;
567 clib_callback_data_init (&vm->vlib_node_runtime_perf_callbacks,
568 &vm->worker_thread_main_loop_callback_lock);
570 vec_validate_aligned (vgm->vlib_mains, n_vlib_mains - 1,
571 CLIB_CACHE_LINE_BYTES);
572 vec_set_len (vgm->vlib_mains, 0);
573 vec_add1_aligned (vgm->vlib_mains, vm, CLIB_CACHE_LINE_BYTES);
575 if (n_vlib_mains > 1)
577 vlib_worker_threads->wait_at_barrier =
578 clib_mem_alloc_aligned (sizeof (u32), CLIB_CACHE_LINE_BYTES);
579 vlib_worker_threads->workers_at_barrier =
580 clib_mem_alloc_aligned (sizeof (u32), CLIB_CACHE_LINE_BYTES);
582 vlib_worker_threads->node_reforks_required =
583 clib_mem_alloc_aligned (sizeof (u32), CLIB_CACHE_LINE_BYTES);
585 /* We'll need the rpc vector lock... */
586 clib_spinlock_init (&vm->pending_rpc_lock);
588 /* Ask for an initial barrier sync */
589 *vlib_worker_threads->workers_at_barrier = 0;
590 *vlib_worker_threads->wait_at_barrier = 1;
592 /* Without update or refork */
593 *vlib_worker_threads->node_reforks_required = 0;
594 vgm->need_vlib_worker_thread_node_runtime_update = 0;
597 vm->barrier_epoch = 0;
598 vm->barrier_no_close_before = 0;
600 worker_thread_index = 1;
601 clib_spinlock_init (&vm->worker_thread_main_loop_callback_lock);
603 for (i = 0; i < vec_len (tm->registrations); i++)
605 vlib_node_main_t *nm, *nm_clone;
608 tr = tm->registrations[i];
613 for (k = 0; k < tr->count; k++)
618 vec_add2 (vlib_worker_threads, w, 1);
619 /* Currently unused, may not really work */
621 w->thread_mheap = clib_mem_create_heap (0, tr->mheap_size,
626 w->thread_mheap = main_heap;
629 vlib_thread_stack_init (w - vlib_worker_threads);
630 w->thread_function = tr->function;
631 w->thread_function_arg = w;
633 w->registration = tr;
636 (char *) format (0, "%s %d", tr->name, k + 1);
637 vec_add1 (w->elog_track.name, 0);
638 elog_track_register (vlib_get_elog_main (), &w->elog_track);
640 if (tr->no_data_structure_clone)
643 /* Fork vlib_global_main et al. Look for bugs here */
644 oldheap = clib_mem_set_heap (w->thread_mheap);
646 vm_clone = clib_mem_alloc_aligned (sizeof (*vm_clone),
647 CLIB_CACHE_LINE_BYTES);
648 clib_memcpy (vm_clone, vlib_get_first_main (),
651 vm_clone->thread_index = worker_thread_index;
652 vm_clone->pending_rpc_requests = 0;
653 vec_validate (vm_clone->pending_rpc_requests, 0);
654 vec_set_len (vm_clone->pending_rpc_requests, 0);
655 clib_memset (&vm_clone->random_buffer, 0,
656 sizeof (vm_clone->random_buffer));
658 (&vm_clone->worker_thread_main_loop_callback_lock);
659 clib_callback_data_init
660 (&vm_clone->vlib_node_runtime_perf_callbacks,
661 &vm_clone->worker_thread_main_loop_callback_lock);
663 nm = &vlib_get_first_main ()->node_main;
664 nm_clone = &vm_clone->node_main;
665 /* fork next frames array, preserving node runtime indices */
666 nm_clone->next_frames = vec_dup_aligned (nm->next_frames,
667 CLIB_CACHE_LINE_BYTES);
668 for (j = 0; j < vec_len (nm_clone->next_frames); j++)
670 vlib_next_frame_t *nf = &nm_clone->next_frames[j];
671 u32 save_node_runtime_index;
674 save_node_runtime_index = nf->node_runtime_index;
675 save_flags = nf->flags & VLIB_FRAME_NO_FREE_AFTER_DISPATCH;
676 vlib_next_frame_init (nf);
677 nf->node_runtime_index = save_node_runtime_index;
678 nf->flags = save_flags;
681 /* fork the frame dispatch queue */
682 nm_clone->pending_frames = 0;
683 vec_validate (nm_clone->pending_frames, 10);
684 vec_set_len (nm_clone->pending_frames, 0);
689 /* Allocate all nodes in single block for speed */
690 n = clib_mem_alloc_no_fail (vec_len (nm->nodes) * sizeof (*n));
692 for (j = 0; j < vec_len (nm->nodes); j++)
694 clib_memcpy (n, nm->nodes[j], sizeof (*n));
695 /* none of the copied nodes have enqueue rights given out */
696 n->owner_node_index = VLIB_INVALID_NODE_INDEX;
697 clib_memset (&n->stats_total, 0, sizeof (n->stats_total));
698 clib_memset (&n->stats_last_clear, 0,
699 sizeof (n->stats_last_clear));
700 vec_add1 (nm_clone->nodes, n);
703 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL] =
704 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL],
705 CLIB_CACHE_LINE_BYTES);
707 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL])
709 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
710 /* copy initial runtime_data from node */
711 if (n->runtime_data && n->runtime_data_bytes > 0)
712 clib_memcpy (rt->runtime_data, n->runtime_data,
713 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
714 n->runtime_data_bytes));
717 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT] =
718 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_INPUT],
719 CLIB_CACHE_LINE_BYTES);
720 clib_interrupt_init (
721 &nm_clone->input_node_interrupts,
722 vec_len (nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT]));
723 clib_interrupt_init (
724 &nm_clone->pre_input_node_interrupts,
725 vec_len (nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT]));
726 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT])
728 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
729 /* copy initial runtime_data from node */
730 if (n->runtime_data && n->runtime_data_bytes > 0)
731 clib_memcpy (rt->runtime_data, n->runtime_data,
732 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
733 n->runtime_data_bytes));
736 nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT] =
737 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT],
738 CLIB_CACHE_LINE_BYTES);
740 nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT])
742 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
743 /* copy initial runtime_data from node */
744 if (n->runtime_data && n->runtime_data_bytes > 0)
745 clib_memcpy (rt->runtime_data, n->runtime_data,
746 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
747 n->runtime_data_bytes));
750 nm_clone->processes = vec_dup_aligned (nm->processes,
751 CLIB_CACHE_LINE_BYTES);
753 /* Create per-thread frame freelist */
754 nm_clone->frame_sizes = 0;
755 nm_clone->node_by_error = nm->node_by_error;
757 /* Packet trace buffers are guaranteed to be empty, nothing to do here */
759 clib_mem_set_heap (oldheap);
760 vec_add1_aligned (vgm->vlib_mains, vm_clone,
761 CLIB_CACHE_LINE_BYTES);
763 /* Switch to the stats segment ... */
764 vlib_stats_validate (stats_err_entry_index, worker_thread_index,
765 vec_len (fvm->error_main.counters) - 1);
766 c = vlib_stats_get_entry_data_pointer (stats_err_entry_index);
767 vm_clone->error_main.counters = c[worker_thread_index];
769 vm_clone->error_main.counters_last_clear = vec_dup_aligned (
770 vlib_get_first_main ()->error_main.counters_last_clear,
771 CLIB_CACHE_LINE_BYTES);
773 worker_thread_index++;
779 /* only have non-data-structure copy threads to create... */
780 for (i = 0; i < vec_len (tm->registrations); i++)
782 tr = tm->registrations[i];
784 for (j = 0; j < tr->count; j++)
786 vec_add2 (vlib_worker_threads, w, 1);
789 w->thread_mheap = clib_mem_create_heap (0, tr->mheap_size,
795 w->thread_mheap = main_heap;
797 vlib_thread_stack_init (w - vlib_worker_threads);
798 w->thread_function = tr->function;
799 w->thread_function_arg = w;
802 (char *) format (0, "%s %d", tr->name, j + 1);
803 w->registration = tr;
804 vec_add1 (w->elog_track.name, 0);
805 elog_track_register (vlib_get_elog_main (), &w->elog_track);
810 worker_thread_index = 1;
812 for (i = 0; i < vec_len (tm->registrations); i++)
817 tr = tm->registrations[i];
819 if (tr->use_pthreads || tm->use_pthreads)
821 for (j = 0; j < tr->count; j++)
824 w = vlib_worker_threads + worker_thread_index++;
825 err = vlib_launch_thread_int (vlib_worker_thread_bootstrap_fn,
828 clib_unix_error ("%U, thread %s init on cpu %d failed",
829 format_clib_error, err, tr->name, 0);
835 clib_bitmap_foreach (c, tr->coremask) {
836 w = vlib_worker_threads + worker_thread_index++;
837 err = vlib_launch_thread_int (vlib_worker_thread_bootstrap_fn,
840 clib_unix_error ("%U, thread %s init on cpu %d failed",
841 format_clib_error, err, tr->name, c);
845 vlib_worker_thread_barrier_sync (vm);
848 err = vlib_call_init_exit_functions (
849 vm, &vgm->num_workers_change_function_registrations, 1 /* call_once */,
852 clib_error_report (err);
854 vlib_worker_thread_barrier_release (vm);
858 VLIB_MAIN_LOOP_ENTER_FUNCTION (start_workers);
862 worker_thread_node_runtime_update_internal (void)
866 vlib_node_main_t *nm, *nm_clone;
867 vlib_main_t *vm_clone;
868 vlib_node_runtime_t *rt;
870 ASSERT (vlib_get_thread_index () == 0);
872 vm = vlib_get_first_main ();
875 ASSERT (*vlib_worker_threads->wait_at_barrier == 1);
878 * Scrape all runtime stats, so we don't lose node runtime(s) with
879 * pending counts, or throw away worker / io thread counts.
881 for (j = 0; j < vec_len (nm->nodes); j++)
885 vlib_node_sync_stats (vm, n);
888 for (i = 1; i < vlib_get_n_threads (); i++)
892 vm_clone = vlib_get_main_by_index (i);
893 nm_clone = &vm_clone->node_main;
895 for (j = 0; j < vec_len (nm_clone->nodes); j++)
897 n = nm_clone->nodes[j];
899 rt = vlib_node_get_runtime (vm_clone, n->index);
900 vlib_node_runtime_sync_stats (vm_clone, rt, 0, 0, 0);
904 /* Per-worker clone rebuilds are now done on each thread */
909 vlib_worker_thread_node_refork (void)
911 vlib_main_t *vm, *vm_clone;
912 vlib_node_main_t *nm, *nm_clone;
913 vlib_node_t **old_nodes_clone;
914 vlib_node_runtime_t *rt, *old_rt;
917 vlib_node_t *new_n_clone;
921 vm = vlib_get_first_main ();
923 vm_clone = vlib_get_main ();
924 nm_clone = &vm_clone->node_main;
926 /* Re-clone error heap */
927 u64 *old_counters_all_clear = vm_clone->error_main.counters_last_clear;
929 clib_memcpy_fast (&vm_clone->error_main, &vm->error_main,
930 sizeof (vm->error_main));
931 j = vec_len (vm->error_main.counters) - 1;
933 c = vlib_stats_get_entry_data_pointer (vm->error_main.stats_err_entry_index);
934 vm_clone->error_main.counters = c[vm_clone->thread_index];
936 vec_validate_aligned (old_counters_all_clear, j, CLIB_CACHE_LINE_BYTES);
937 vm_clone->error_main.counters_last_clear = old_counters_all_clear;
939 for (j = 0; j < vec_len (nm_clone->next_frames); j++)
941 vlib_next_frame_t *nf = &nm_clone->next_frames[j];
942 if ((nf->flags & VLIB_FRAME_IS_ALLOCATED) && nf->frame != NULL)
944 vlib_frame_t *f = nf->frame;
946 vlib_frame_free (vm_clone, f);
950 vec_free (nm_clone->next_frames);
951 nm_clone->next_frames = vec_dup_aligned (nm->next_frames,
952 CLIB_CACHE_LINE_BYTES);
954 for (j = 0; j < vec_len (nm_clone->next_frames); j++)
956 vlib_next_frame_t *nf = &nm_clone->next_frames[j];
957 u32 save_node_runtime_index;
960 save_node_runtime_index = nf->node_runtime_index;
961 save_flags = nf->flags & VLIB_FRAME_NO_FREE_AFTER_DISPATCH;
962 vlib_next_frame_init (nf);
963 nf->node_runtime_index = save_node_runtime_index;
964 nf->flags = save_flags;
967 old_nodes_clone = nm_clone->nodes;
972 /* Allocate all nodes in single block for speed */
974 clib_mem_alloc_no_fail (vec_len (nm->nodes) * sizeof (*new_n_clone));
975 for (j = 0; j < vec_len (nm->nodes); j++)
977 vlib_node_t *new_n = nm->nodes[j];
979 clib_memcpy_fast (new_n_clone, new_n, sizeof (*new_n));
980 /* none of the copied nodes have enqueue rights given out */
981 new_n_clone->owner_node_index = VLIB_INVALID_NODE_INDEX;
983 if (j >= vec_len (old_nodes_clone))
985 /* new node, set to zero */
986 clib_memset (&new_n_clone->stats_total, 0,
987 sizeof (new_n_clone->stats_total));
988 clib_memset (&new_n_clone->stats_last_clear, 0,
989 sizeof (new_n_clone->stats_last_clear));
993 vlib_node_t *old_n_clone = old_nodes_clone[j];
994 /* Copy stats if the old data is valid */
995 clib_memcpy_fast (&new_n_clone->stats_total,
996 &old_n_clone->stats_total,
997 sizeof (new_n_clone->stats_total));
998 clib_memcpy_fast (&new_n_clone->stats_last_clear,
999 &old_n_clone->stats_last_clear,
1000 sizeof (new_n_clone->stats_last_clear));
1002 /* keep previous node state */
1003 new_n_clone->state = old_n_clone->state;
1004 new_n_clone->flags = old_n_clone->flags;
1006 vec_add1 (nm_clone->nodes, new_n_clone);
1009 /* Free the old node clones */
1010 clib_mem_free (old_nodes_clone[0]);
1012 vec_free (old_nodes_clone);
1015 /* re-clone internal nodes */
1016 old_rt = nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL];
1017 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL] =
1018 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL],
1019 CLIB_CACHE_LINE_BYTES);
1021 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL])
1023 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
1024 /* copy runtime_data, will be overwritten later for existing rt */
1025 if (n->runtime_data && n->runtime_data_bytes > 0)
1026 clib_memcpy_fast (rt->runtime_data, n->runtime_data,
1027 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
1028 n->runtime_data_bytes));
1031 for (j = 0; j < vec_len (old_rt); j++)
1033 rt = vlib_node_get_runtime (vm_clone, old_rt[j].node_index);
1034 rt->state = old_rt[j].state;
1035 rt->flags = old_rt[j].flags;
1036 clib_memcpy_fast (rt->runtime_data, old_rt[j].runtime_data,
1037 VLIB_NODE_RUNTIME_DATA_SIZE);
1042 /* re-clone input nodes */
1043 old_rt = nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT];
1044 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT] =
1045 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_INPUT],
1046 CLIB_CACHE_LINE_BYTES);
1047 clib_interrupt_resize (
1048 &nm_clone->input_node_interrupts,
1049 vec_len (nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT]));
1050 clib_interrupt_resize (
1051 &nm_clone->pre_input_node_interrupts,
1052 vec_len (nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT]));
1054 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT])
1056 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
1057 /* copy runtime_data, will be overwritten later for existing rt */
1058 if (n->runtime_data && n->runtime_data_bytes > 0)
1059 clib_memcpy_fast (rt->runtime_data, n->runtime_data,
1060 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
1061 n->runtime_data_bytes));
1064 for (j = 0; j < vec_len (old_rt); j++)
1066 rt = vlib_node_get_runtime (vm_clone, old_rt[j].node_index);
1067 rt->state = old_rt[j].state;
1068 rt->flags = old_rt[j].flags;
1069 clib_memcpy_fast (rt->runtime_data, old_rt[j].runtime_data,
1070 VLIB_NODE_RUNTIME_DATA_SIZE);
1075 /* re-clone pre-input nodes */
1076 old_rt = nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT];
1077 nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT] =
1078 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT],
1079 CLIB_CACHE_LINE_BYTES);
1081 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT])
1083 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
1084 /* copy runtime_data, will be overwritten later for existing rt */
1085 if (n->runtime_data && n->runtime_data_bytes > 0)
1086 clib_memcpy_fast (rt->runtime_data, n->runtime_data,
1087 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
1088 n->runtime_data_bytes));
1091 for (j = 0; j < vec_len (old_rt); j++)
1093 rt = vlib_node_get_runtime (vm_clone, old_rt[j].node_index);
1094 rt->state = old_rt[j].state;
1095 rt->flags = old_rt[j].flags;
1096 clib_memcpy_fast (rt->runtime_data, old_rt[j].runtime_data,
1097 VLIB_NODE_RUNTIME_DATA_SIZE);
1102 vec_free (nm_clone->processes);
1103 nm_clone->processes = vec_dup_aligned (nm->processes,
1104 CLIB_CACHE_LINE_BYTES);
1105 nm_clone->node_by_error = nm->node_by_error;
1109 vlib_worker_thread_node_runtime_update (void)
1112 * Make a note that we need to do a node runtime update
1113 * prior to releasing the barrier.
1115 vlib_global_main.need_vlib_worker_thread_node_runtime_update = 1;
1119 unformat_sched_policy (unformat_input_t * input, va_list * args)
1121 u32 *r = va_arg (*args, u32 *);
1124 #define _(v,f,s) else if (unformat (input, s)) *r = SCHED_POLICY_##f;
1125 foreach_sched_policy
1132 static clib_error_t *
1133 cpu_config (vlib_main_t * vm, unformat_input_t * input)
1135 vlib_thread_registration_t *tr;
1137 vlib_thread_main_t *tm = &vlib_thread_main;
1141 int use_corelist = 0;
1143 tm->thread_registrations_by_name = hash_create_string (0, sizeof (uword));
1145 tm->n_thread_stacks = 1; /* account for main thread */
1146 tm->sched_policy = ~0;
1147 tm->sched_priority = ~0;
1148 tm->main_lcore = ~0;
1154 hash_set_mem (tm->thread_registrations_by_name, tr->name, (uword) tr);
1158 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1160 if (unformat (input, "use-pthreads"))
1161 tm->use_pthreads = 1;
1162 else if (unformat (input, "thread-prefix %v", &tm->thread_prefix))
1164 else if (unformat (input, "main-core %u", &tm->main_lcore))
1166 else if (unformat (input, "skip-cores %u", &tm->skip_cores))
1168 else if (unformat (input, "numa-heap-size %U",
1169 unformat_memory_size, &tm->numa_heap_size))
1171 else if (unformat (input, "coremask-%s %U", &name,
1172 unformat_bitmap_mask, &bitmap) ||
1173 unformat (input, "corelist-%s %U", &name,
1174 unformat_bitmap_list, &bitmap))
1176 p = hash_get_mem (tm->thread_registrations_by_name, name);
1178 return clib_error_return (0, "no such thread type '%s'", name);
1180 tr = (vlib_thread_registration_t *) p[0];
1182 if (tr->use_pthreads)
1183 return clib_error_return (0,
1184 "corelist cannot be set for '%s' threads",
1187 return clib_error_return
1188 (0, "core placement of '%s' threads is already configured",
1191 tr->coremask = bitmap;
1192 tr->count = clib_bitmap_count_set_bits (tr->coremask);
1197 (input, "scheduler-policy %U", unformat_sched_policy,
1200 else if (unformat (input, "scheduler-priority %u", &tm->sched_priority))
1202 else if (unformat (input, "%s %u", &name, &count))
1204 p = hash_get_mem (tm->thread_registrations_by_name, name);
1206 return clib_error_return (0, "no such thread type 3 '%s'", name);
1208 tr = (vlib_thread_registration_t *) p[0];
1210 if (tr->fixed_count)
1211 return clib_error_return
1212 (0, "number of '%s' threads not configurable", name);
1214 return clib_error_return
1215 (0, "number of '%s' threads is already configured", name);
1223 if (use_corelist && tm->main_lcore == ~0)
1224 return clib_error_return (0, "main-core must be specified when using "
1225 "corelist-* or coremask-* attribute");
1226 if (tm->sched_priority != ~0)
1228 if (tm->sched_policy == SCHED_FIFO || tm->sched_policy == SCHED_RR)
1230 u32 prio_max = sched_get_priority_max (tm->sched_policy);
1231 u32 prio_min = sched_get_priority_min (tm->sched_policy);
1232 if (tm->sched_priority > prio_max)
1233 tm->sched_priority = prio_max;
1234 if (tm->sched_priority < prio_min)
1235 tm->sched_priority = prio_min;
1239 return clib_error_return
1241 "scheduling priority (%d) is not allowed for `normal` scheduling policy",
1242 tm->sched_priority);
1247 if (!tm->thread_prefix)
1248 tm->thread_prefix = format (0, "vpp");
1252 tm->n_thread_stacks += tr->count;
1253 tm->n_pthreads += tr->count * tr->use_pthreads;
1254 tm->n_threads += tr->count * (tr->use_pthreads == 0);
1261 VLIB_EARLY_CONFIG_FUNCTION (cpu_config, "cpu");
1264 * Enforce minimum open time to minimize packet loss due to Rx overflow,
1265 * based on a test based heuristic that barrier should be open for at least
1266 * 3 time as long as it is closed (with an upper bound of 1ms because by that
1267 * point it is probably too late to make a difference)
1270 #ifndef BARRIER_MINIMUM_OPEN_LIMIT
1271 #define BARRIER_MINIMUM_OPEN_LIMIT 0.001
1274 #ifndef BARRIER_MINIMUM_OPEN_FACTOR
1275 #define BARRIER_MINIMUM_OPEN_FACTOR 3
1279 vlib_worker_thread_initial_barrier_sync_and_release (vlib_main_t * vm)
1282 f64 now = vlib_time_now (vm);
1283 u32 count = vlib_get_n_threads () - 1;
1285 /* No worker threads? */
1289 deadline = now + BARRIER_SYNC_TIMEOUT;
1290 *vlib_worker_threads->wait_at_barrier = 1;
1291 while (*vlib_worker_threads->workers_at_barrier != count)
1293 if ((now = vlib_time_now (vm)) > deadline)
1295 fformat (stderr, "%s: worker thread deadlock\n", __FUNCTION__);
1300 *vlib_worker_threads->wait_at_barrier = 0;
1304 * Return true if the wroker thread barrier is held
1307 vlib_worker_thread_barrier_held (void)
1309 if (vlib_get_n_threads () < 2)
1312 return (*vlib_worker_threads->wait_at_barrier == 1);
1316 vlib_worker_thread_barrier_sync_int (vlib_main_t * vm, const char *func_name)
1323 f64 max_vector_rate;
1327 if (vlib_get_n_threads () < 2)
1330 ASSERT (vlib_get_thread_index () == 0);
1332 vlib_worker_threads[0].barrier_caller = func_name;
1333 count = vlib_get_n_threads () - 1;
1335 /* Record entry relative to last close */
1336 now = vlib_time_now (vm);
1337 t_entry = now - vm->barrier_epoch;
1339 /* Tolerate recursive calls */
1340 if (++vlib_worker_threads[0].recursion_level > 1)
1342 barrier_trace_sync_rec (t_entry);
1346 if (PREDICT_FALSE (vec_len (vm->barrier_perf_callbacks) != 0))
1347 clib_call_callbacks (vm->barrier_perf_callbacks, vm,
1348 vm->clib_time.last_cpu_time, 0 /* enter */ );
1351 * Need data to decide if we're working hard enough to honor
1352 * the barrier hold-down timer.
1354 max_vector_rate = 0.0;
1355 for (i = 1; i < vlib_get_n_threads (); i++)
1357 vlib_main_t *ovm = vlib_get_main_by_index (i);
1358 max_vector_rate = clib_max (max_vector_rate,
1359 (f64) vlib_last_vectors_per_main_loop (ovm));
1362 vlib_worker_threads[0].barrier_sync_count++;
1364 /* Enforce minimum barrier open time to minimize packet loss */
1365 ASSERT (vm->barrier_no_close_before <= (now + BARRIER_MINIMUM_OPEN_LIMIT));
1368 * If any worker thread seems busy, which we define
1369 * as a vector rate above 10, we enforce the barrier hold-down timer
1371 if (max_vector_rate > 10.0)
1375 now = vlib_time_now (vm);
1376 /* Barrier hold-down timer expired? */
1377 if (now >= vm->barrier_no_close_before)
1379 if ((vm->barrier_no_close_before - now)
1380 > (2.0 * BARRIER_MINIMUM_OPEN_LIMIT))
1383 ("clock change: would have waited for %.4f seconds",
1384 (vm->barrier_no_close_before - now));
1389 /* Record time of closure */
1390 t_open = now - vm->barrier_epoch;
1391 vm->barrier_epoch = now;
1393 deadline = now + BARRIER_SYNC_TIMEOUT;
1395 *vlib_worker_threads->wait_at_barrier = 1;
1396 while (*vlib_worker_threads->workers_at_barrier != count)
1398 if ((now = vlib_time_now (vm)) > deadline)
1400 fformat (stderr, "%s: worker thread deadlock\n", __FUNCTION__);
1405 t_closed = now - vm->barrier_epoch;
1407 barrier_trace_sync (t_entry, t_open, t_closed);
1412 vlib_worker_thread_barrier_release (vlib_main_t * vm)
1414 vlib_global_main_t *vgm = vlib_get_global_main ();
1420 f64 t_update_main = 0.0;
1421 int refork_needed = 0;
1423 if (vlib_get_n_threads () < 2)
1426 ASSERT (vlib_get_thread_index () == 0);
1429 now = vlib_time_now (vm);
1430 t_entry = now - vm->barrier_epoch;
1432 if (--vlib_worker_threads[0].recursion_level > 0)
1434 barrier_trace_release_rec (t_entry);
1438 /* Update (all) node runtimes before releasing the barrier, if needed */
1439 if (vgm->need_vlib_worker_thread_node_runtime_update)
1442 * Lock stat segment here, so we's safe when
1443 * rebuilding the stat segment node clones from the
1446 vlib_stats_segment_lock ();
1448 /* Do stats elements on main thread */
1449 worker_thread_node_runtime_update_internal ();
1450 vgm->need_vlib_worker_thread_node_runtime_update = 0;
1452 /* Do per thread rebuilds in parallel */
1454 clib_atomic_fetch_add (vlib_worker_threads->node_reforks_required,
1455 (vlib_get_n_threads () - 1));
1456 now = vlib_time_now (vm);
1457 t_update_main = now - vm->barrier_epoch;
1460 deadline = now + BARRIER_SYNC_TIMEOUT;
1463 * Note when we let go of the barrier.
1464 * Workers can use this to derive a reasonably accurate
1465 * time offset. See vlib_time_now(...)
1467 vm->time_last_barrier_release = vlib_time_now (vm);
1468 CLIB_MEMORY_STORE_BARRIER ();
1470 *vlib_worker_threads->wait_at_barrier = 0;
1472 while (*vlib_worker_threads->workers_at_barrier > 0)
1474 if ((now = vlib_time_now (vm)) > deadline)
1476 fformat (stderr, "%s: worker thread deadlock\n", __FUNCTION__);
1481 /* Wait for reforks before continuing */
1484 now = vlib_time_now (vm);
1486 deadline = now + BARRIER_SYNC_TIMEOUT;
1488 while (*vlib_worker_threads->node_reforks_required > 0)
1490 if ((now = vlib_time_now (vm)) > deadline)
1492 fformat (stderr, "%s: worker thread refork deadlock\n",
1497 vlib_stats_segment_unlock ();
1500 t_closed_total = now - vm->barrier_epoch;
1502 minimum_open = t_closed_total * BARRIER_MINIMUM_OPEN_FACTOR;
1504 if (minimum_open > BARRIER_MINIMUM_OPEN_LIMIT)
1506 minimum_open = BARRIER_MINIMUM_OPEN_LIMIT;
1509 vm->barrier_no_close_before = now + minimum_open;
1511 /* Record barrier epoch (used to enforce minimum open time) */
1512 vm->barrier_epoch = now;
1514 barrier_trace_release (t_entry, t_closed_total, t_update_main);
1516 if (PREDICT_FALSE (vec_len (vm->barrier_perf_callbacks) != 0))
1517 clib_call_callbacks (vm->barrier_perf_callbacks, vm,
1518 vm->clib_time.last_cpu_time, 1 /* leave */ );
1522 vlib_worker_sync_rpc (void *args)
1524 ASSERT (vlib_thread_is_main_w_barrier ());
1525 vlib_worker_threads->wait_before_barrier = 0;
1529 vlib_workers_sync (void)
1531 if (PREDICT_FALSE (!vlib_num_workers ()))
1534 if (!(*vlib_worker_threads->wait_at_barrier) &&
1535 !clib_atomic_swap_rel_n (&vlib_worker_threads->wait_before_barrier, 1))
1537 u32 thread_index = vlib_get_thread_index ();
1538 vlib_rpc_call_main_thread (vlib_worker_sync_rpc, (u8 *) &thread_index,
1539 sizeof (thread_index));
1540 vlib_worker_flush_pending_rpc_requests (vlib_get_main ());
1543 /* Wait until main thread asks for barrier */
1544 while (!(*vlib_worker_threads->wait_at_barrier))
1547 /* Stop before barrier and make sure all threads are either
1548 * at worker barrier or the barrier before it */
1549 clib_atomic_fetch_add (&vlib_worker_threads->workers_before_barrier, 1);
1550 while (vlib_num_workers () > (*vlib_worker_threads->workers_at_barrier +
1551 vlib_worker_threads->workers_before_barrier))
1556 vlib_workers_continue (void)
1558 if (PREDICT_FALSE (!vlib_num_workers ()))
1561 clib_atomic_fetch_add (&vlib_worker_threads->done_work_before_barrier, 1);
1563 /* Wait until all workers are done with work before barrier */
1564 while (vlib_worker_threads->done_work_before_barrier <
1565 vlib_worker_threads->workers_before_barrier)
1568 clib_atomic_fetch_add (&vlib_worker_threads->done_work_before_barrier, -1);
1569 clib_atomic_fetch_add (&vlib_worker_threads->workers_before_barrier, -1);
1573 * Wait until each of the workers has been once around the track
1576 vlib_worker_wait_one_loop (void)
1578 vlib_global_main_t *vgm = vlib_get_global_main ();
1579 ASSERT (vlib_get_thread_index () == 0);
1581 if (vlib_get_n_threads () < 2)
1584 if (vlib_worker_thread_barrier_held ())
1590 vec_validate (counts, vlib_get_n_threads () - 1);
1592 /* record the current loop counts */
1593 vec_foreach_index (ii, vgm->vlib_mains)
1594 counts[ii] = vgm->vlib_mains[ii]->main_loop_count;
1596 /* spin until each changes, apart from the main thread, or we'd be
1598 for (ii = 1; ii < vec_len (counts); ii++)
1600 while (counts[ii] == vgm->vlib_mains[ii]->main_loop_count)
1609 vlib_worker_flush_pending_rpc_requests (vlib_main_t *vm)
1611 vlib_main_t *vm_global = vlib_get_first_main ();
1613 ASSERT (vm != vm_global);
1615 clib_spinlock_lock_if_init (&vm_global->pending_rpc_lock);
1616 vec_append (vm_global->pending_rpc_requests, vm->pending_rpc_requests);
1617 vec_reset_length (vm->pending_rpc_requests);
1618 clib_spinlock_unlock_if_init (&vm_global->pending_rpc_lock);
1622 vlib_worker_thread_fn (void *arg)
1624 vlib_global_main_t *vgm = vlib_get_global_main ();
1625 vlib_worker_thread_t *w = (vlib_worker_thread_t *) arg;
1626 vlib_main_t *vm = vlib_get_main ();
1629 ASSERT (vm->thread_index == vlib_get_thread_index ());
1631 vlib_worker_thread_init (w);
1632 clib_time_init (&vm->clib_time);
1633 clib_mem_set_heap (w->thread_mheap);
1635 vm->worker_init_functions_called = hash_create (0, 0);
1637 e = vlib_call_init_exit_functions_no_sort (
1638 vm, &vgm->worker_init_function_registrations, 1 /* call_once */,
1641 clib_error_report (e);
1643 vlib_worker_loop (vm);
1646 VLIB_REGISTER_THREAD (worker_thread_reg, static) = {
1649 .function = vlib_worker_thread_fn,
1652 extern clib_march_fn_registration
1653 *vlib_frame_queue_dequeue_with_aux_fn_march_fn_registrations;
1654 extern clib_march_fn_registration
1655 *vlib_frame_queue_dequeue_fn_march_fn_registrations;
1657 vlib_frame_queue_main_init (u32 node_index, u32 frame_queue_nelts)
1659 vlib_thread_main_t *tm = vlib_get_thread_main ();
1660 vlib_main_t *vm = vlib_get_main ();
1661 vlib_frame_queue_main_t *fqm;
1662 vlib_frame_queue_t *fq;
1667 if (frame_queue_nelts == 0)
1668 frame_queue_nelts = FRAME_QUEUE_MAX_NELTS;
1670 num_threads = 1 /* main thread */ + tm->n_threads;
1671 ASSERT (frame_queue_nelts >= 8 + num_threads);
1673 vec_add2 (tm->frame_queue_mains, fqm, 1);
1675 node = vlib_get_node (vm, fqm->node_index);
1677 if (node->aux_offset)
1679 fqm->frame_queue_dequeue_fn =
1680 CLIB_MARCH_FN_VOID_POINTER (vlib_frame_queue_dequeue_with_aux_fn);
1684 fqm->frame_queue_dequeue_fn =
1685 CLIB_MARCH_FN_VOID_POINTER (vlib_frame_queue_dequeue_fn);
1688 fqm->node_index = node_index;
1689 fqm->frame_queue_nelts = frame_queue_nelts;
1691 vec_validate (fqm->vlib_frame_queues, tm->n_vlib_mains - 1);
1692 vec_set_len (fqm->vlib_frame_queues, 0);
1693 for (i = 0; i < tm->n_vlib_mains; i++)
1695 fq = vlib_frame_queue_alloc (frame_queue_nelts);
1696 vec_add1 (fqm->vlib_frame_queues, fq);
1699 return (fqm - tm->frame_queue_mains);
1703 vlib_process_signal_event_mt_helper (vlib_process_signal_event_mt_args_t *
1706 ASSERT (vlib_get_thread_index () == 0);
1707 vlib_process_signal_event (vlib_get_main (), args->node_index,
1708 args->type_opaque, args->data);
1711 void *rpc_call_main_thread_cb_fn;
1714 vlib_rpc_call_main_thread (void *callback, u8 * args, u32 arg_size)
1716 if (rpc_call_main_thread_cb_fn)
1718 void (*fp) (void *, u8 *, u32) = rpc_call_main_thread_cb_fn;
1719 (*fp) (callback, args, arg_size);
1722 clib_warning ("BUG: rpc_call_main_thread_cb_fn NULL!");
1726 threads_init (vlib_main_t * vm)
1728 const vlib_thread_main_t *tm = vlib_get_thread_main ();
1730 if (tm->main_lcore == ~0 && tm->n_vlib_mains > 1)
1731 return clib_error_return (0, "Configuration error, a main core must "
1732 "be specified when using worker threads");
1737 VLIB_INIT_FUNCTION (threads_init);
1739 static clib_error_t *
1740 show_clock_command_fn (vlib_main_t * vm,
1741 unformat_input_t * input, vlib_cli_command_t * cmd)
1744 clib_timebase_t _tb, *tb = &_tb;
1746 (void) unformat (input, "verbose %=", &verbose, 1);
1748 clib_timebase_init (tb, 0 /* GMT */ , CLIB_TIMEBASE_DAYLIGHT_NONE,
1751 vlib_cli_output (vm, "%U, %U GMT", format_clib_time, &vm->clib_time,
1752 verbose, format_clib_timebase_time,
1753 clib_timebase_now (tb));
1755 vlib_cli_output (vm, "Time last barrier release %.9f",
1756 vm->time_last_barrier_release);
1758 foreach_vlib_main ()
1760 vlib_cli_output (vm, "%d: %U", this_vlib_main->thread_index,
1761 format_clib_time, &this_vlib_main->clib_time, verbose);
1763 vlib_cli_output (vm, "Thread %d offset %.9f error %.9f",
1764 this_vlib_main->thread_index,
1765 this_vlib_main->time_offset,
1766 vm->time_last_barrier_release -
1767 this_vlib_main->time_last_barrier_release);
1772 VLIB_CLI_COMMAND (f_command, static) =
1774 .path = "show clock",
1775 .short_help = "show clock",
1776 .function = show_clock_command_fn,
1779 vlib_thread_main_t *
1780 vlib_get_thread_main_not_inline (void)
1782 return vlib_get_thread_main ();
1786 * fd.io coding-style-patch-verification: ON
1789 * eval: (c-set-style "gnu")