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 <vppinfra/bitmap.h>
24 #include <vppinfra/unix.h>
25 #include <vlib/vlib.h>
27 #include <vlib/threads.h>
29 #include <vlib/stats/stats.h>
37 vlib_worker_thread_t *vlib_worker_threads;
38 vlib_thread_main_t vlib_thread_main;
41 * Barrier tracing can be enabled on a normal build to collect information
42 * on barrier use, including timings and call stacks. Deliberately not
43 * keyed off CLIB_DEBUG, because that can add significant overhead which
44 * imapacts observed timings.
48 barrier_trace_sync (f64 t_entry, f64 t_open, f64 t_closed)
50 if (!vlib_worker_threads->barrier_elog_enabled)
53 ELOG_TYPE_DECLARE (e) = {
54 .format = "bar-trace-%s-#%d",
55 .format_args = "T4i4",
60 u32 caller, count, t_entry, t_open, t_closed;
63 ed = ELOG_DATA (&vlib_global_main.elog_main, e);
64 ed->count = (int) vlib_worker_threads[0].barrier_sync_count;
65 ed->caller = elog_string (&vlib_global_main.elog_main,
66 (char *) vlib_worker_threads[0].barrier_caller);
67 ed->t_entry = (int) (1000000.0 * t_entry);
68 ed->t_open = (int) (1000000.0 * t_open);
69 ed->t_closed = (int) (1000000.0 * t_closed);
73 barrier_trace_sync_rec (f64 t_entry)
75 if (!vlib_worker_threads->barrier_elog_enabled)
78 ELOG_TYPE_DECLARE (e) = {
79 .format = "bar-syncrec-%s-#%d",
80 .format_args = "T4i4",
88 ed = ELOG_DATA (&vlib_global_main.elog_main, e);
89 ed->depth = (int) vlib_worker_threads[0].recursion_level - 1;
90 ed->caller = elog_string (&vlib_global_main.elog_main,
91 (char *) vlib_worker_threads[0].barrier_caller);
95 barrier_trace_release_rec (f64 t_entry)
97 if (!vlib_worker_threads->barrier_elog_enabled)
100 ELOG_TYPE_DECLARE (e) = {
101 .format = "bar-relrrec-#%d",
110 ed = ELOG_DATA (&vlib_global_main.elog_main, e);
111 ed->depth = (int) vlib_worker_threads[0].recursion_level;
115 barrier_trace_release (f64 t_entry, f64 t_closed_total, f64 t_update_main)
117 if (!vlib_worker_threads->barrier_elog_enabled)
120 ELOG_TYPE_DECLARE (e) = {
121 .format = "bar-rel-#%d-e%d-u%d-t%d",
122 .format_args = "i4i4i4i4",
127 u32 count, t_entry, t_update_main, t_closed_total;
130 ed = ELOG_DATA (&vlib_global_main.elog_main, e);
131 ed->t_entry = (int) (1000000.0 * t_entry);
132 ed->t_update_main = (int) (1000000.0 * t_update_main);
133 ed->t_closed_total = (int) (1000000.0 * t_closed_total);
134 ed->count = (int) vlib_worker_threads[0].barrier_sync_count;
136 /* Reset context for next trace */
137 vlib_worker_threads[0].barrier_context = NULL;
141 os_get_nthreads (void)
143 return vec_len (vlib_thread_stacks);
147 vlib_set_thread_name (char *name)
149 int pthread_setname_np (pthread_t __target_thread, const char *__name);
151 pthread_t thread = pthread_self ();
155 rv = pthread_setname_np (thread, name);
157 clib_warning ("pthread_setname_np returned %d", rv);
162 sort_registrations_by_no_clone (void *a0, void *a1)
164 vlib_thread_registration_t **tr0 = a0;
165 vlib_thread_registration_t **tr1 = a1;
167 return ((i32) ((*tr0)->no_data_structure_clone)
168 - ((i32) ((*tr1)->no_data_structure_clone)));
172 /* Called early in the init sequence */
175 vlib_thread_init (vlib_main_t * vm)
177 vlib_thread_main_t *tm = &vlib_thread_main;
178 vlib_worker_thread_t *w;
179 vlib_thread_registration_t *tr;
180 u32 n_vlib_mains = 1;
184 u32 stats_num_worker_threads_dir_index;
186 stats_num_worker_threads_dir_index =
187 vlib_stats_add_gauge ("/sys/num_worker_threads");
188 ASSERT (stats_num_worker_threads_dir_index != ~0);
190 /* get bitmaps of active cpu cores and sockets */
191 tm->cpu_core_bitmap = os_get_online_cpu_core_bitmap ();
192 tm->cpu_socket_bitmap = os_get_online_cpu_node_bitmap ();
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);
443 nbmp = os_get_online_cpu_node_bitmap ();
444 clib_bitmap_foreach (node, nbmp) {
445 p = format (p, "%s%u/cpulist%c", sys_node_path, node, 0);
446 clib_sysfs_read ((char *) p, "%U", unformat_bitmap_list, &cbmp);
447 if (clib_bitmap_get (cbmp, cpu_id))
449 vec_reset_length (cbmp);
450 vec_reset_length (p);
457 w->core_id = core_id;
458 w->numa_id = numa_id;
461 static clib_error_t *
462 vlib_launch_thread_int (void *fp, vlib_worker_thread_t * w, unsigned cpu_id)
464 clib_mem_main_t *mm = &clib_mem_main;
465 vlib_thread_main_t *tm = &vlib_thread_main;
469 void *(*fp_arg) (void *) = fp;
473 vlib_get_thread_core_numa (w, cpu_id);
475 /* Set up NUMA-bound heap if indicated */
476 if (mm->per_numa_mheaps[w->numa_id] == 0)
478 /* If the user requested a NUMA heap, create it... */
479 if (tm->numa_heap_size)
481 clib_mem_set_numa_affinity (w->numa_id, 1 /* force */ );
482 numa_heap = clib_mem_create_heap (0 /* DIY */ , tm->numa_heap_size,
484 "numa %u heap", w->numa_id);
485 clib_mem_set_default_numa_affinity ();
486 mm->per_numa_mheaps[w->numa_id] = numa_heap;
490 /* Or, use the main heap */
491 mm->per_numa_mheaps[w->numa_id] = w->thread_mheap;
496 CPU_SET (cpu_id, &cpuset);
498 if (pthread_attr_init (&attr))
499 return clib_error_return_unix (0, "pthread_attr_init");
501 if (pthread_attr_setstack (&attr, w->thread_stack,
502 VLIB_THREAD_STACK_SIZE))
503 return clib_error_return_unix (0, "pthread_attr_setstack");
505 if (pthread_create (&worker, &attr, fp_arg, (void *) w))
506 return clib_error_return_unix (0, "pthread_create");
508 if (pthread_setaffinity_np (worker, sizeof (cpu_set_t), &cpuset))
509 return clib_error_return_unix (0, "pthread_setaffinity_np");
511 if (pthread_attr_destroy (&attr))
512 return clib_error_return_unix (0, "pthread_attr_destroy");
517 static clib_error_t *
518 start_workers (vlib_main_t * vm)
520 vlib_global_main_t *vgm = vlib_get_global_main ();
521 vlib_main_t *fvm = vlib_get_first_main ();
523 vlib_worker_thread_t *w;
524 vlib_main_t *vm_clone;
526 vlib_thread_main_t *tm = &vlib_thread_main;
527 vlib_thread_registration_t *tr;
528 vlib_node_runtime_t *rt;
529 u32 n_vlib_mains = tm->n_vlib_mains;
530 u32 worker_thread_index;
531 u32 stats_err_entry_index = fvm->error_main.stats_err_entry_index;
532 clib_mem_heap_t *main_heap = clib_mem_get_per_cpu_heap ();
533 vlib_stats_register_mem_heap (main_heap);
535 vec_reset_length (vlib_worker_threads);
537 /* Set up the main thread */
538 vec_add2_aligned (vlib_worker_threads, w, 1, CLIB_CACHE_LINE_BYTES);
539 w->elog_track.name = "main thread";
540 elog_track_register (vlib_get_elog_main (), &w->elog_track);
542 if (vec_len (tm->thread_prefix))
544 w->name = format (0, "%v_main%c", tm->thread_prefix, '\0');
545 vlib_set_thread_name ((char *) w->name);
548 vgm->elog_main.lock =
549 clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES, CLIB_CACHE_LINE_BYTES);
550 vgm->elog_main.lock[0] = 0;
552 clib_callback_data_init (&vm->vlib_node_runtime_perf_callbacks,
553 &vm->worker_thread_main_loop_callback_lock);
555 vec_validate_aligned (vgm->vlib_mains, n_vlib_mains - 1,
556 CLIB_CACHE_LINE_BYTES);
557 vec_set_len (vgm->vlib_mains, 0);
558 vec_add1_aligned (vgm->vlib_mains, vm, CLIB_CACHE_LINE_BYTES);
560 if (n_vlib_mains > 1)
562 vlib_worker_threads->wait_at_barrier =
563 clib_mem_alloc_aligned (sizeof (u32), CLIB_CACHE_LINE_BYTES);
564 vlib_worker_threads->workers_at_barrier =
565 clib_mem_alloc_aligned (sizeof (u32), CLIB_CACHE_LINE_BYTES);
567 vlib_worker_threads->node_reforks_required =
568 clib_mem_alloc_aligned (sizeof (u32), CLIB_CACHE_LINE_BYTES);
570 /* We'll need the rpc vector lock... */
571 clib_spinlock_init (&vm->pending_rpc_lock);
573 /* Ask for an initial barrier sync */
574 *vlib_worker_threads->workers_at_barrier = 0;
575 *vlib_worker_threads->wait_at_barrier = 1;
577 /* Without update or refork */
578 *vlib_worker_threads->node_reforks_required = 0;
579 vgm->need_vlib_worker_thread_node_runtime_update = 0;
582 vm->barrier_epoch = 0;
583 vm->barrier_no_close_before = 0;
585 worker_thread_index = 1;
586 clib_spinlock_init (&vm->worker_thread_main_loop_callback_lock);
588 for (i = 0; i < vec_len (tm->registrations); i++)
590 vlib_node_main_t *nm, *nm_clone;
593 tr = tm->registrations[i];
598 for (k = 0; k < tr->count; k++)
603 vec_add2 (vlib_worker_threads, w, 1);
604 /* Currently unused, may not really work */
606 w->thread_mheap = clib_mem_create_heap (0, tr->mheap_size,
611 w->thread_mheap = main_heap;
614 vlib_thread_stack_init (w - vlib_worker_threads);
615 w->thread_function = tr->function;
616 w->thread_function_arg = w;
618 w->registration = tr;
621 (char *) format (0, "%s %d", tr->name, k + 1);
622 vec_add1 (w->elog_track.name, 0);
623 elog_track_register (vlib_get_elog_main (), &w->elog_track);
625 if (tr->no_data_structure_clone)
628 /* Fork vlib_global_main et al. Look for bugs here */
629 oldheap = clib_mem_set_heap (w->thread_mheap);
631 vm_clone = clib_mem_alloc_aligned (sizeof (*vm_clone),
632 CLIB_CACHE_LINE_BYTES);
633 clib_memcpy (vm_clone, vlib_get_first_main (),
636 vm_clone->thread_index = worker_thread_index;
637 vm_clone->pending_rpc_requests = 0;
638 vec_validate (vm_clone->pending_rpc_requests, 0);
639 vec_set_len (vm_clone->pending_rpc_requests, 0);
640 clib_memset (&vm_clone->random_buffer, 0,
641 sizeof (vm_clone->random_buffer));
643 (&vm_clone->worker_thread_main_loop_callback_lock);
644 clib_callback_data_init
645 (&vm_clone->vlib_node_runtime_perf_callbacks,
646 &vm_clone->worker_thread_main_loop_callback_lock);
648 nm = &vlib_get_first_main ()->node_main;
649 nm_clone = &vm_clone->node_main;
650 /* fork next frames array, preserving node runtime indices */
651 nm_clone->next_frames = vec_dup_aligned (nm->next_frames,
652 CLIB_CACHE_LINE_BYTES);
653 for (j = 0; j < vec_len (nm_clone->next_frames); j++)
655 vlib_next_frame_t *nf = &nm_clone->next_frames[j];
656 u32 save_node_runtime_index;
659 save_node_runtime_index = nf->node_runtime_index;
660 save_flags = nf->flags & VLIB_FRAME_NO_FREE_AFTER_DISPATCH;
661 vlib_next_frame_init (nf);
662 nf->node_runtime_index = save_node_runtime_index;
663 nf->flags = save_flags;
666 /* fork the frame dispatch queue */
667 nm_clone->pending_frames = 0;
668 vec_validate (nm_clone->pending_frames, 10);
669 vec_set_len (nm_clone->pending_frames, 0);
674 /* Allocate all nodes in single block for speed */
675 n = clib_mem_alloc_no_fail (vec_len (nm->nodes) * sizeof (*n));
677 for (j = 0; j < vec_len (nm->nodes); j++)
679 clib_memcpy (n, nm->nodes[j], sizeof (*n));
680 /* none of the copied nodes have enqueue rights given out */
681 n->owner_node_index = VLIB_INVALID_NODE_INDEX;
682 clib_memset (&n->stats_total, 0, sizeof (n->stats_total));
683 clib_memset (&n->stats_last_clear, 0,
684 sizeof (n->stats_last_clear));
685 vec_add1 (nm_clone->nodes, n);
688 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL] =
689 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL],
690 CLIB_CACHE_LINE_BYTES);
692 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL])
694 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
695 /* copy initial runtime_data from node */
696 if (n->runtime_data && n->runtime_data_bytes > 0)
697 clib_memcpy (rt->runtime_data, n->runtime_data,
698 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
699 n->runtime_data_bytes));
702 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT] =
703 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_INPUT],
704 CLIB_CACHE_LINE_BYTES);
705 clib_interrupt_init (
706 &nm_clone->input_node_interrupts,
707 vec_len (nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT]));
708 clib_interrupt_init (
709 &nm_clone->pre_input_node_interrupts,
710 vec_len (nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT]));
711 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT])
713 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
714 /* copy initial runtime_data from node */
715 if (n->runtime_data && n->runtime_data_bytes > 0)
716 clib_memcpy (rt->runtime_data, n->runtime_data,
717 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
718 n->runtime_data_bytes));
721 nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT] =
722 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT],
723 CLIB_CACHE_LINE_BYTES);
725 nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT])
727 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
728 /* copy initial runtime_data from node */
729 if (n->runtime_data && n->runtime_data_bytes > 0)
730 clib_memcpy (rt->runtime_data, n->runtime_data,
731 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
732 n->runtime_data_bytes));
735 nm_clone->processes = vec_dup_aligned (nm->processes,
736 CLIB_CACHE_LINE_BYTES);
738 /* Create per-thread frame freelist */
739 nm_clone->frame_sizes = 0;
740 nm_clone->node_by_error = nm->node_by_error;
742 /* Packet trace buffers are guaranteed to be empty, nothing to do here */
744 clib_mem_set_heap (oldheap);
745 vec_add1_aligned (vgm->vlib_mains, vm_clone,
746 CLIB_CACHE_LINE_BYTES);
748 /* Switch to the stats segment ... */
749 vlib_stats_validate (stats_err_entry_index, worker_thread_index,
750 vec_len (fvm->error_main.counters) - 1);
751 c = vlib_stats_get_entry_data_pointer (stats_err_entry_index);
752 vm_clone->error_main.counters = c[worker_thread_index];
754 vm_clone->error_main.counters_last_clear = vec_dup_aligned (
755 vlib_get_first_main ()->error_main.counters_last_clear,
756 CLIB_CACHE_LINE_BYTES);
758 worker_thread_index++;
764 /* only have non-data-structure copy threads to create... */
765 for (i = 0; i < vec_len (tm->registrations); i++)
767 tr = tm->registrations[i];
769 for (j = 0; j < tr->count; j++)
771 vec_add2 (vlib_worker_threads, w, 1);
774 w->thread_mheap = clib_mem_create_heap (0, tr->mheap_size,
780 w->thread_mheap = main_heap;
782 vlib_thread_stack_init (w - vlib_worker_threads);
783 w->thread_function = tr->function;
784 w->thread_function_arg = w;
787 (char *) format (0, "%s %d", tr->name, j + 1);
788 w->registration = tr;
789 vec_add1 (w->elog_track.name, 0);
790 elog_track_register (vlib_get_elog_main (), &w->elog_track);
795 worker_thread_index = 1;
797 for (i = 0; i < vec_len (tm->registrations); i++)
802 tr = tm->registrations[i];
804 if (tr->use_pthreads || tm->use_pthreads)
806 for (j = 0; j < tr->count; j++)
809 w = vlib_worker_threads + worker_thread_index++;
810 err = vlib_launch_thread_int (vlib_worker_thread_bootstrap_fn,
813 clib_unix_error ("%U, thread %s init on cpu %d failed",
814 format_clib_error, err, tr->name, 0);
820 clib_bitmap_foreach (c, tr->coremask) {
821 w = vlib_worker_threads + worker_thread_index++;
822 err = vlib_launch_thread_int (vlib_worker_thread_bootstrap_fn,
825 clib_unix_error ("%U, thread %s init on cpu %d failed",
826 format_clib_error, err, tr->name, c);
830 vlib_worker_thread_barrier_sync (vm);
833 err = vlib_call_init_exit_functions (
834 vm, &vgm->num_workers_change_function_registrations, 1 /* call_once */,
837 clib_error_report (err);
839 vlib_worker_thread_barrier_release (vm);
843 VLIB_MAIN_LOOP_ENTER_FUNCTION (start_workers);
847 worker_thread_node_runtime_update_internal (void)
851 vlib_node_main_t *nm, *nm_clone;
852 vlib_main_t *vm_clone;
853 vlib_node_runtime_t *rt;
855 ASSERT (vlib_get_thread_index () == 0);
857 vm = vlib_get_first_main ();
860 ASSERT (*vlib_worker_threads->wait_at_barrier == 1);
863 * Scrape all runtime stats, so we don't lose node runtime(s) with
864 * pending counts, or throw away worker / io thread counts.
866 for (j = 0; j < vec_len (nm->nodes); j++)
870 vlib_node_sync_stats (vm, n);
873 for (i = 1; i < vlib_get_n_threads (); i++)
877 vm_clone = vlib_get_main_by_index (i);
878 nm_clone = &vm_clone->node_main;
880 for (j = 0; j < vec_len (nm_clone->nodes); j++)
882 n = nm_clone->nodes[j];
884 rt = vlib_node_get_runtime (vm_clone, n->index);
885 vlib_node_runtime_sync_stats (vm_clone, rt, 0, 0, 0);
889 /* Per-worker clone rebuilds are now done on each thread */
894 vlib_worker_thread_node_refork (void)
896 vlib_main_t *vm, *vm_clone;
897 vlib_node_main_t *nm, *nm_clone;
898 vlib_node_t **old_nodes_clone;
899 vlib_node_runtime_t *rt, *old_rt;
902 vlib_node_t *new_n_clone;
906 vm = vlib_get_first_main ();
908 vm_clone = vlib_get_main ();
909 nm_clone = &vm_clone->node_main;
911 /* Re-clone error heap */
912 u64 *old_counters_all_clear = vm_clone->error_main.counters_last_clear;
914 clib_memcpy_fast (&vm_clone->error_main, &vm->error_main,
915 sizeof (vm->error_main));
916 j = vec_len (vm->error_main.counters) - 1;
918 c = vlib_stats_get_entry_data_pointer (vm->error_main.stats_err_entry_index);
919 vm_clone->error_main.counters = c[vm_clone->thread_index];
921 vec_validate_aligned (old_counters_all_clear, j, CLIB_CACHE_LINE_BYTES);
922 vm_clone->error_main.counters_last_clear = old_counters_all_clear;
924 for (j = 0; j < vec_len (nm_clone->next_frames); j++)
926 vlib_next_frame_t *nf = &nm_clone->next_frames[j];
927 if ((nf->flags & VLIB_FRAME_IS_ALLOCATED) && nf->frame != NULL)
929 vlib_frame_t *f = nf->frame;
931 vlib_frame_free (vm_clone, f);
935 vec_free (nm_clone->next_frames);
936 nm_clone->next_frames = vec_dup_aligned (nm->next_frames,
937 CLIB_CACHE_LINE_BYTES);
939 for (j = 0; j < vec_len (nm_clone->next_frames); j++)
941 vlib_next_frame_t *nf = &nm_clone->next_frames[j];
942 u32 save_node_runtime_index;
945 save_node_runtime_index = nf->node_runtime_index;
946 save_flags = nf->flags & VLIB_FRAME_NO_FREE_AFTER_DISPATCH;
947 vlib_next_frame_init (nf);
948 nf->node_runtime_index = save_node_runtime_index;
949 nf->flags = save_flags;
952 old_nodes_clone = nm_clone->nodes;
957 /* Allocate all nodes in single block for speed */
959 clib_mem_alloc_no_fail (vec_len (nm->nodes) * sizeof (*new_n_clone));
960 for (j = 0; j < vec_len (nm->nodes); j++)
962 vlib_node_t *new_n = nm->nodes[j];
964 clib_memcpy_fast (new_n_clone, new_n, sizeof (*new_n));
965 /* none of the copied nodes have enqueue rights given out */
966 new_n_clone->owner_node_index = VLIB_INVALID_NODE_INDEX;
968 if (j >= vec_len (old_nodes_clone))
970 /* new node, set to zero */
971 clib_memset (&new_n_clone->stats_total, 0,
972 sizeof (new_n_clone->stats_total));
973 clib_memset (&new_n_clone->stats_last_clear, 0,
974 sizeof (new_n_clone->stats_last_clear));
978 vlib_node_t *old_n_clone = old_nodes_clone[j];
979 /* Copy stats if the old data is valid */
980 clib_memcpy_fast (&new_n_clone->stats_total,
981 &old_n_clone->stats_total,
982 sizeof (new_n_clone->stats_total));
983 clib_memcpy_fast (&new_n_clone->stats_last_clear,
984 &old_n_clone->stats_last_clear,
985 sizeof (new_n_clone->stats_last_clear));
987 /* keep previous node state */
988 new_n_clone->state = old_n_clone->state;
989 new_n_clone->flags = old_n_clone->flags;
991 vec_add1 (nm_clone->nodes, new_n_clone);
994 /* Free the old node clones */
995 clib_mem_free (old_nodes_clone[0]);
997 vec_free (old_nodes_clone);
1000 /* re-clone internal nodes */
1001 old_rt = nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL];
1002 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL] =
1003 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL],
1004 CLIB_CACHE_LINE_BYTES);
1006 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL])
1008 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
1009 /* copy runtime_data, will be overwritten later for existing rt */
1010 if (n->runtime_data && n->runtime_data_bytes > 0)
1011 clib_memcpy_fast (rt->runtime_data, n->runtime_data,
1012 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
1013 n->runtime_data_bytes));
1016 for (j = 0; j < vec_len (old_rt); j++)
1018 rt = vlib_node_get_runtime (vm_clone, old_rt[j].node_index);
1019 rt->state = old_rt[j].state;
1020 rt->flags = old_rt[j].flags;
1021 clib_memcpy_fast (rt->runtime_data, old_rt[j].runtime_data,
1022 VLIB_NODE_RUNTIME_DATA_SIZE);
1027 /* re-clone input nodes */
1028 old_rt = nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT];
1029 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT] =
1030 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_INPUT],
1031 CLIB_CACHE_LINE_BYTES);
1032 clib_interrupt_resize (
1033 &nm_clone->input_node_interrupts,
1034 vec_len (nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT]));
1035 clib_interrupt_resize (
1036 &nm_clone->pre_input_node_interrupts,
1037 vec_len (nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT]));
1039 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT])
1041 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
1042 /* copy runtime_data, will be overwritten later for existing rt */
1043 if (n->runtime_data && n->runtime_data_bytes > 0)
1044 clib_memcpy_fast (rt->runtime_data, n->runtime_data,
1045 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
1046 n->runtime_data_bytes));
1049 for (j = 0; j < vec_len (old_rt); j++)
1051 rt = vlib_node_get_runtime (vm_clone, old_rt[j].node_index);
1052 rt->state = old_rt[j].state;
1053 rt->flags = old_rt[j].flags;
1054 clib_memcpy_fast (rt->runtime_data, old_rt[j].runtime_data,
1055 VLIB_NODE_RUNTIME_DATA_SIZE);
1060 /* re-clone pre-input nodes */
1061 old_rt = nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT];
1062 nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT] =
1063 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT],
1064 CLIB_CACHE_LINE_BYTES);
1066 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT])
1068 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
1069 /* copy runtime_data, will be overwritten later for existing rt */
1070 if (n->runtime_data && n->runtime_data_bytes > 0)
1071 clib_memcpy_fast (rt->runtime_data, n->runtime_data,
1072 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
1073 n->runtime_data_bytes));
1076 for (j = 0; j < vec_len (old_rt); j++)
1078 rt = vlib_node_get_runtime (vm_clone, old_rt[j].node_index);
1079 rt->state = old_rt[j].state;
1080 rt->flags = old_rt[j].flags;
1081 clib_memcpy_fast (rt->runtime_data, old_rt[j].runtime_data,
1082 VLIB_NODE_RUNTIME_DATA_SIZE);
1087 vec_free (nm_clone->processes);
1088 nm_clone->processes = vec_dup_aligned (nm->processes,
1089 CLIB_CACHE_LINE_BYTES);
1090 nm_clone->node_by_error = nm->node_by_error;
1094 vlib_worker_thread_node_runtime_update (void)
1097 * Make a note that we need to do a node runtime update
1098 * prior to releasing the barrier.
1100 vlib_global_main.need_vlib_worker_thread_node_runtime_update = 1;
1104 unformat_sched_policy (unformat_input_t * input, va_list * args)
1106 u32 *r = va_arg (*args, u32 *);
1109 #define _(v,f,s) else if (unformat (input, s)) *r = SCHED_POLICY_##f;
1110 foreach_sched_policy
1117 static clib_error_t *
1118 cpu_config (vlib_main_t * vm, unformat_input_t * input)
1120 vlib_thread_registration_t *tr;
1122 vlib_thread_main_t *tm = &vlib_thread_main;
1127 tm->thread_registrations_by_name = hash_create_string (0, sizeof (uword));
1129 tm->n_thread_stacks = 1; /* account for main thread */
1130 tm->sched_policy = ~0;
1131 tm->sched_priority = ~0;
1132 tm->main_lcore = ~0;
1138 hash_set_mem (tm->thread_registrations_by_name, tr->name, (uword) tr);
1142 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1144 if (unformat (input, "use-pthreads"))
1145 tm->use_pthreads = 1;
1146 else if (unformat (input, "thread-prefix %v", &tm->thread_prefix))
1148 else if (unformat (input, "main-core %u", &tm->main_lcore))
1150 else if (unformat (input, "skip-cores %u", &tm->skip_cores))
1152 else if (unformat (input, "numa-heap-size %U",
1153 unformat_memory_size, &tm->numa_heap_size))
1155 else if (unformat (input, "coremask-%s %U", &name,
1156 unformat_bitmap_mask, &bitmap) ||
1157 unformat (input, "corelist-%s %U", &name,
1158 unformat_bitmap_list, &bitmap))
1160 p = hash_get_mem (tm->thread_registrations_by_name, name);
1162 return clib_error_return (0, "no such thread type '%s'", name);
1164 tr = (vlib_thread_registration_t *) p[0];
1166 if (tr->use_pthreads)
1167 return clib_error_return (0,
1168 "corelist cannot be set for '%s' threads",
1171 return clib_error_return
1172 (0, "core placement of '%s' threads is already configured",
1175 tr->coremask = bitmap;
1176 tr->count = clib_bitmap_count_set_bits (tr->coremask);
1180 (input, "scheduler-policy %U", unformat_sched_policy,
1183 else if (unformat (input, "scheduler-priority %u", &tm->sched_priority))
1185 else if (unformat (input, "%s %u", &name, &count))
1187 p = hash_get_mem (tm->thread_registrations_by_name, name);
1189 return clib_error_return (0, "no such thread type 3 '%s'", name);
1191 tr = (vlib_thread_registration_t *) p[0];
1193 if (tr->fixed_count)
1194 return clib_error_return
1195 (0, "number of '%s' threads not configurable", name);
1197 return clib_error_return
1198 (0, "number of '%s' threads is already configured", name);
1206 if (tm->sched_priority != ~0)
1208 if (tm->sched_policy == SCHED_FIFO || tm->sched_policy == SCHED_RR)
1210 u32 prio_max = sched_get_priority_max (tm->sched_policy);
1211 u32 prio_min = sched_get_priority_min (tm->sched_policy);
1212 if (tm->sched_priority > prio_max)
1213 tm->sched_priority = prio_max;
1214 if (tm->sched_priority < prio_min)
1215 tm->sched_priority = prio_min;
1219 return clib_error_return
1221 "scheduling priority (%d) is not allowed for `normal` scheduling policy",
1222 tm->sched_priority);
1227 if (!tm->thread_prefix)
1228 tm->thread_prefix = format (0, "vpp");
1232 tm->n_thread_stacks += tr->count;
1233 tm->n_pthreads += tr->count * tr->use_pthreads;
1234 tm->n_threads += tr->count * (tr->use_pthreads == 0);
1241 VLIB_EARLY_CONFIG_FUNCTION (cpu_config, "cpu");
1244 * Enforce minimum open time to minimize packet loss due to Rx overflow,
1245 * based on a test based heuristic that barrier should be open for at least
1246 * 3 time as long as it is closed (with an upper bound of 1ms because by that
1247 * point it is probably too late to make a difference)
1250 #ifndef BARRIER_MINIMUM_OPEN_LIMIT
1251 #define BARRIER_MINIMUM_OPEN_LIMIT 0.001
1254 #ifndef BARRIER_MINIMUM_OPEN_FACTOR
1255 #define BARRIER_MINIMUM_OPEN_FACTOR 3
1259 vlib_worker_thread_initial_barrier_sync_and_release (vlib_main_t * vm)
1262 f64 now = vlib_time_now (vm);
1263 u32 count = vlib_get_n_threads () - 1;
1265 /* No worker threads? */
1269 deadline = now + BARRIER_SYNC_TIMEOUT;
1270 *vlib_worker_threads->wait_at_barrier = 1;
1271 while (*vlib_worker_threads->workers_at_barrier != count)
1273 if ((now = vlib_time_now (vm)) > deadline)
1275 fformat (stderr, "%s: worker thread deadlock\n", __FUNCTION__);
1280 *vlib_worker_threads->wait_at_barrier = 0;
1284 * Return true if the wroker thread barrier is held
1287 vlib_worker_thread_barrier_held (void)
1289 if (vlib_get_n_threads () < 2)
1292 return (*vlib_worker_threads->wait_at_barrier == 1);
1296 vlib_worker_thread_barrier_sync_int (vlib_main_t * vm, const char *func_name)
1303 f64 max_vector_rate;
1307 if (vlib_get_n_threads () < 2)
1310 ASSERT (vlib_get_thread_index () == 0);
1312 vlib_worker_threads[0].barrier_caller = func_name;
1313 count = vlib_get_n_threads () - 1;
1315 /* Record entry relative to last close */
1316 now = vlib_time_now (vm);
1317 t_entry = now - vm->barrier_epoch;
1319 /* Tolerate recursive calls */
1320 if (++vlib_worker_threads[0].recursion_level > 1)
1322 barrier_trace_sync_rec (t_entry);
1326 if (PREDICT_FALSE (vec_len (vm->barrier_perf_callbacks) != 0))
1327 clib_call_callbacks (vm->barrier_perf_callbacks, vm,
1328 vm->clib_time.last_cpu_time, 0 /* enter */ );
1331 * Need data to decide if we're working hard enough to honor
1332 * the barrier hold-down timer.
1334 max_vector_rate = 0.0;
1335 for (i = 1; i < vlib_get_n_threads (); i++)
1337 vlib_main_t *ovm = vlib_get_main_by_index (i);
1338 max_vector_rate = clib_max (max_vector_rate,
1339 (f64) vlib_last_vectors_per_main_loop (ovm));
1342 vlib_worker_threads[0].barrier_sync_count++;
1344 /* Enforce minimum barrier open time to minimize packet loss */
1345 ASSERT (vm->barrier_no_close_before <= (now + BARRIER_MINIMUM_OPEN_LIMIT));
1348 * If any worker thread seems busy, which we define
1349 * as a vector rate above 10, we enforce the barrier hold-down timer
1351 if (max_vector_rate > 10.0)
1355 now = vlib_time_now (vm);
1356 /* Barrier hold-down timer expired? */
1357 if (now >= vm->barrier_no_close_before)
1359 if ((vm->barrier_no_close_before - now)
1360 > (2.0 * BARRIER_MINIMUM_OPEN_LIMIT))
1363 ("clock change: would have waited for %.4f seconds",
1364 (vm->barrier_no_close_before - now));
1369 /* Record time of closure */
1370 t_open = now - vm->barrier_epoch;
1371 vm->barrier_epoch = now;
1373 deadline = now + BARRIER_SYNC_TIMEOUT;
1375 *vlib_worker_threads->wait_at_barrier = 1;
1376 while (*vlib_worker_threads->workers_at_barrier != count)
1378 if ((now = vlib_time_now (vm)) > deadline)
1380 fformat (stderr, "%s: worker thread deadlock\n", __FUNCTION__);
1385 t_closed = now - vm->barrier_epoch;
1387 barrier_trace_sync (t_entry, t_open, t_closed);
1392 vlib_worker_thread_barrier_release (vlib_main_t * vm)
1394 vlib_global_main_t *vgm = vlib_get_global_main ();
1400 f64 t_update_main = 0.0;
1401 int refork_needed = 0;
1403 if (vlib_get_n_threads () < 2)
1406 ASSERT (vlib_get_thread_index () == 0);
1409 now = vlib_time_now (vm);
1410 t_entry = now - vm->barrier_epoch;
1412 if (--vlib_worker_threads[0].recursion_level > 0)
1414 barrier_trace_release_rec (t_entry);
1418 /* Update (all) node runtimes before releasing the barrier, if needed */
1419 if (vgm->need_vlib_worker_thread_node_runtime_update)
1422 * Lock stat segment here, so we's safe when
1423 * rebuilding the stat segment node clones from the
1426 vlib_stats_segment_lock ();
1428 /* Do stats elements on main thread */
1429 worker_thread_node_runtime_update_internal ();
1430 vgm->need_vlib_worker_thread_node_runtime_update = 0;
1432 /* Do per thread rebuilds in parallel */
1434 clib_atomic_fetch_add (vlib_worker_threads->node_reforks_required,
1435 (vlib_get_n_threads () - 1));
1436 now = vlib_time_now (vm);
1437 t_update_main = now - vm->barrier_epoch;
1440 deadline = now + BARRIER_SYNC_TIMEOUT;
1443 * Note when we let go of the barrier.
1444 * Workers can use this to derive a reasonably accurate
1445 * time offset. See vlib_time_now(...)
1447 vm->time_last_barrier_release = vlib_time_now (vm);
1448 CLIB_MEMORY_STORE_BARRIER ();
1450 *vlib_worker_threads->wait_at_barrier = 0;
1452 while (*vlib_worker_threads->workers_at_barrier > 0)
1454 if ((now = vlib_time_now (vm)) > deadline)
1456 fformat (stderr, "%s: worker thread deadlock\n", __FUNCTION__);
1461 /* Wait for reforks before continuing */
1464 now = vlib_time_now (vm);
1466 deadline = now + BARRIER_SYNC_TIMEOUT;
1468 while (*vlib_worker_threads->node_reforks_required > 0)
1470 if ((now = vlib_time_now (vm)) > deadline)
1472 fformat (stderr, "%s: worker thread refork deadlock\n",
1477 vlib_stats_segment_unlock ();
1480 t_closed_total = now - vm->barrier_epoch;
1482 minimum_open = t_closed_total * BARRIER_MINIMUM_OPEN_FACTOR;
1484 if (minimum_open > BARRIER_MINIMUM_OPEN_LIMIT)
1486 minimum_open = BARRIER_MINIMUM_OPEN_LIMIT;
1489 vm->barrier_no_close_before = now + minimum_open;
1491 /* Record barrier epoch (used to enforce minimum open time) */
1492 vm->barrier_epoch = now;
1494 barrier_trace_release (t_entry, t_closed_total, t_update_main);
1496 if (PREDICT_FALSE (vec_len (vm->barrier_perf_callbacks) != 0))
1497 clib_call_callbacks (vm->barrier_perf_callbacks, vm,
1498 vm->clib_time.last_cpu_time, 1 /* leave */ );
1502 vlib_worker_sync_rpc (void *args)
1504 ASSERT (vlib_thread_is_main_w_barrier ());
1505 vlib_worker_threads->wait_before_barrier = 0;
1509 vlib_workers_sync (void)
1511 if (PREDICT_FALSE (!vlib_num_workers ()))
1514 if (!(*vlib_worker_threads->wait_at_barrier) &&
1515 !clib_atomic_swap_rel_n (&vlib_worker_threads->wait_before_barrier, 1))
1517 u32 thread_index = vlib_get_thread_index ();
1518 vlib_rpc_call_main_thread (vlib_worker_sync_rpc, (u8 *) &thread_index,
1519 sizeof (thread_index));
1520 vlib_worker_flush_pending_rpc_requests (vlib_get_main ());
1523 /* Wait until main thread asks for barrier */
1524 while (!(*vlib_worker_threads->wait_at_barrier))
1527 /* Stop before barrier and make sure all threads are either
1528 * at worker barrier or the barrier before it */
1529 clib_atomic_fetch_add (&vlib_worker_threads->workers_before_barrier, 1);
1530 while (vlib_num_workers () > (*vlib_worker_threads->workers_at_barrier +
1531 vlib_worker_threads->workers_before_barrier))
1536 vlib_workers_continue (void)
1538 if (PREDICT_FALSE (!vlib_num_workers ()))
1541 clib_atomic_fetch_add (&vlib_worker_threads->done_work_before_barrier, 1);
1543 /* Wait until all workers are done with work before barrier */
1544 while (vlib_worker_threads->done_work_before_barrier <
1545 vlib_worker_threads->workers_before_barrier)
1548 clib_atomic_fetch_add (&vlib_worker_threads->done_work_before_barrier, -1);
1549 clib_atomic_fetch_add (&vlib_worker_threads->workers_before_barrier, -1);
1553 * Wait until each of the workers has been once around the track
1556 vlib_worker_wait_one_loop (void)
1558 vlib_global_main_t *vgm = vlib_get_global_main ();
1559 ASSERT (vlib_get_thread_index () == 0);
1561 if (vlib_get_n_threads () < 2)
1564 if (vlib_worker_thread_barrier_held ())
1570 vec_validate (counts, vlib_get_n_threads () - 1);
1572 /* record the current loop counts */
1573 vec_foreach_index (ii, vgm->vlib_mains)
1574 counts[ii] = vgm->vlib_mains[ii]->main_loop_count;
1576 /* spin until each changes, apart from the main thread, or we'd be
1578 for (ii = 1; ii < vec_len (counts); ii++)
1580 while (counts[ii] == vgm->vlib_mains[ii]->main_loop_count)
1589 vlib_worker_flush_pending_rpc_requests (vlib_main_t *vm)
1591 vlib_main_t *vm_global = vlib_get_first_main ();
1593 ASSERT (vm != vm_global);
1595 clib_spinlock_lock_if_init (&vm_global->pending_rpc_lock);
1596 vec_append (vm_global->pending_rpc_requests, vm->pending_rpc_requests);
1597 vec_reset_length (vm->pending_rpc_requests);
1598 clib_spinlock_unlock_if_init (&vm_global->pending_rpc_lock);
1602 vlib_worker_thread_fn (void *arg)
1604 vlib_global_main_t *vgm = vlib_get_global_main ();
1605 vlib_worker_thread_t *w = (vlib_worker_thread_t *) arg;
1606 vlib_main_t *vm = vlib_get_main ();
1609 ASSERT (vm->thread_index == vlib_get_thread_index ());
1611 vlib_worker_thread_init (w);
1612 clib_time_init (&vm->clib_time);
1613 clib_mem_set_heap (w->thread_mheap);
1615 vm->worker_init_functions_called = hash_create (0, 0);
1617 e = vlib_call_init_exit_functions_no_sort (
1618 vm, &vgm->worker_init_function_registrations, 1 /* call_once */,
1621 clib_error_report (e);
1623 vlib_worker_loop (vm);
1627 VLIB_REGISTER_THREAD (worker_thread_reg, static) = {
1630 .function = vlib_worker_thread_fn,
1634 extern clib_march_fn_registration
1635 *vlib_frame_queue_dequeue_with_aux_fn_march_fn_registrations;
1636 extern clib_march_fn_registration
1637 *vlib_frame_queue_dequeue_fn_march_fn_registrations;
1639 vlib_frame_queue_main_init (u32 node_index, u32 frame_queue_nelts)
1641 vlib_thread_main_t *tm = vlib_get_thread_main ();
1642 vlib_main_t *vm = vlib_get_main ();
1643 vlib_frame_queue_main_t *fqm;
1644 vlib_frame_queue_t *fq;
1649 if (frame_queue_nelts == 0)
1650 frame_queue_nelts = FRAME_QUEUE_MAX_NELTS;
1652 num_threads = 1 /* main thread */ + tm->n_threads;
1653 ASSERT (frame_queue_nelts >= 8 + num_threads);
1655 vec_add2 (tm->frame_queue_mains, fqm, 1);
1657 node = vlib_get_node (vm, fqm->node_index);
1659 if (node->aux_offset)
1661 fqm->frame_queue_dequeue_fn =
1662 CLIB_MARCH_FN_VOID_POINTER (vlib_frame_queue_dequeue_with_aux_fn);
1666 fqm->frame_queue_dequeue_fn =
1667 CLIB_MARCH_FN_VOID_POINTER (vlib_frame_queue_dequeue_fn);
1670 fqm->node_index = node_index;
1671 fqm->frame_queue_nelts = frame_queue_nelts;
1673 vec_validate (fqm->vlib_frame_queues, tm->n_vlib_mains - 1);
1674 vec_set_len (fqm->vlib_frame_queues, 0);
1675 for (i = 0; i < tm->n_vlib_mains; i++)
1677 fq = vlib_frame_queue_alloc (frame_queue_nelts);
1678 vec_add1 (fqm->vlib_frame_queues, fq);
1681 return (fqm - tm->frame_queue_mains);
1685 vlib_process_signal_event_mt_helper (vlib_process_signal_event_mt_args_t *
1688 ASSERT (vlib_get_thread_index () == 0);
1689 vlib_process_signal_event (vlib_get_main (), args->node_index,
1690 args->type_opaque, args->data);
1693 void *rpc_call_main_thread_cb_fn;
1696 vlib_rpc_call_main_thread (void *callback, u8 * args, u32 arg_size)
1698 if (rpc_call_main_thread_cb_fn)
1700 void (*fp) (void *, u8 *, u32) = rpc_call_main_thread_cb_fn;
1701 (*fp) (callback, args, arg_size);
1704 clib_warning ("BUG: rpc_call_main_thread_cb_fn NULL!");
1708 threads_init (vlib_main_t * vm)
1710 const vlib_thread_main_t *tm = vlib_get_thread_main ();
1712 if (tm->main_lcore == ~0 && tm->n_vlib_mains > 1)
1713 return clib_error_return (0, "Configuration error, a main core must "
1714 "be specified when using worker threads");
1719 VLIB_INIT_FUNCTION (threads_init);
1721 static clib_error_t *
1722 show_clock_command_fn (vlib_main_t * vm,
1723 unformat_input_t * input, vlib_cli_command_t * cmd)
1726 clib_timebase_t _tb, *tb = &_tb;
1728 (void) unformat (input, "verbose %=", &verbose, 1);
1730 clib_timebase_init (tb, 0 /* GMT */ , CLIB_TIMEBASE_DAYLIGHT_NONE,
1733 vlib_cli_output (vm, "%U, %U GMT", format_clib_time, &vm->clib_time,
1734 verbose, format_clib_timebase_time,
1735 clib_timebase_now (tb));
1737 vlib_cli_output (vm, "Time last barrier release %.9f",
1738 vm->time_last_barrier_release);
1740 foreach_vlib_main ()
1742 vlib_cli_output (vm, "%d: %U", this_vlib_main->thread_index,
1743 format_clib_time, &this_vlib_main->clib_time, verbose);
1745 vlib_cli_output (vm, "Thread %d offset %.9f error %.9f",
1746 this_vlib_main->thread_index,
1747 this_vlib_main->time_offset,
1748 vm->time_last_barrier_release -
1749 this_vlib_main->time_last_barrier_release);
1755 VLIB_CLI_COMMAND (f_command, static) =
1757 .path = "show clock",
1758 .short_help = "show clock",
1759 .function = show_clock_command_fn,
1763 vlib_thread_main_t *
1764 vlib_get_thread_main_not_inline (void)
1766 return vlib_get_thread_main ();
1770 * fd.io coding-style-patch-verification: ON
1773 * eval: (c-set-style "gnu")