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/stat_weak_inlines.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;
183 /* get bitmaps of active cpu cores and sockets */
184 tm->cpu_core_bitmap =
185 clib_sysfs_list_to_bitmap ("/sys/devices/system/cpu/online");
186 tm->cpu_socket_bitmap =
187 clib_sysfs_list_to_bitmap ("/sys/devices/system/node/online");
189 avail_cpu = clib_bitmap_dup (tm->cpu_core_bitmap);
192 for (i = 0; i < tm->skip_cores; i++)
194 uword c = clib_bitmap_first_set (avail_cpu);
196 return clib_error_return (0, "no available cpus to skip");
198 avail_cpu = clib_bitmap_set (avail_cpu, c, 0);
201 /* grab cpu for main thread */
202 if (tm->main_lcore == ~0)
204 /* if main-lcore is not set, we try to use lcore 1 */
205 if (clib_bitmap_get (avail_cpu, 1))
208 tm->main_lcore = clib_bitmap_first_set (avail_cpu);
209 if (tm->main_lcore == (u8) ~ 0)
210 return clib_error_return (0, "no available cpus to be used for the"
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);
219 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->cb.vlib_thread_set_lcore_cb)
228 tm->cb.vlib_thread_set_lcore_cb (0, tm->main_lcore);
234 CPU_SET (tm->main_lcore, &cpuset);
235 pthread_setaffinity_np (pthread_self (), sizeof (cpu_set_t), &cpuset);
238 /* Set up thread 0 */
239 vec_validate_aligned (vlib_worker_threads, 0, CLIB_CACHE_LINE_BYTES);
240 _vec_len (vlib_worker_threads) = 1;
241 w = vlib_worker_threads;
242 w->thread_mheap = clib_mem_get_heap ();
243 w->thread_stack = vlib_thread_stacks[0];
244 w->cpu_id = tm->main_lcore;
245 w->lwp = syscall (SYS_gettid);
246 w->thread_id = pthread_self ();
247 tm->n_vlib_mains = 1;
249 vlib_get_thread_core_numa (w, w->cpu_id);
251 if (tm->sched_policy != ~0)
253 struct sched_param sched_param;
254 if (!sched_getparam (w->lwp, &sched_param))
256 if (tm->sched_priority != ~0)
257 sched_param.sched_priority = tm->sched_priority;
258 sched_setscheduler (w->lwp, tm->sched_policy, &sched_param);
262 /* assign threads to cores and set n_vlib_mains */
267 vec_add1 (tm->registrations, tr);
271 vec_sort_with_function (tm->registrations, sort_registrations_by_no_clone);
273 for (i = 0; i < vec_len (tm->registrations); i++)
276 tr = tm->registrations[i];
277 tr->first_index = first_index;
278 first_index += tr->count;
279 n_vlib_mains += (tr->no_data_structure_clone == 0) ? tr->count : 0;
281 /* construct coremask */
282 if (tr->use_pthreads || !tr->count)
289 clib_bitmap_foreach (c, tr->coremask) {
290 if (clib_bitmap_get(avail_cpu, c) == 0)
291 return clib_error_return (0, "cpu %u is not available to be used"
292 " for the '%s' thread",c, tr->name);
294 avail_cpu = clib_bitmap_set(avail_cpu, c, 0);
300 for (j = 0; j < tr->count; j++)
302 /* Do not use CPU 0 by default - leave it to the host and IRQs */
303 uword avail_c0 = clib_bitmap_get (avail_cpu, 0);
304 avail_cpu = clib_bitmap_set (avail_cpu, 0, 0);
306 uword c = clib_bitmap_first_set (avail_cpu);
307 /* Use CPU 0 as a last resort */
308 if (c == ~0 && avail_c0)
315 return clib_error_return (0,
316 "no available cpus to be used for"
317 " the '%s' thread", tr->name);
319 avail_cpu = clib_bitmap_set (avail_cpu, 0, avail_c0);
320 avail_cpu = clib_bitmap_set (avail_cpu, c, 0);
321 tr->coremask = clib_bitmap_set (tr->coremask, c, 1);
326 clib_bitmap_free (avail_cpu);
328 tm->n_vlib_mains = n_vlib_mains;
331 * Allocate the remaining worker threads, and thread stack vector slots
332 * from now on, calls to os_get_nthreads() will return the correct
335 vec_validate_aligned (vlib_worker_threads, first_index - 1,
336 CLIB_CACHE_LINE_BYTES);
337 vec_validate (vlib_thread_stacks, vec_len (vlib_worker_threads) - 1);
342 vlib_frame_queue_alloc (int nelts)
344 vlib_frame_queue_t *fq;
346 fq = clib_mem_alloc_aligned (sizeof (*fq), CLIB_CACHE_LINE_BYTES);
347 clib_memset (fq, 0, sizeof (*fq));
349 fq->vector_threshold = 2 * VLIB_FRAME_SIZE;
350 vec_validate_aligned (fq->elts, nelts - 1, CLIB_CACHE_LINE_BYTES);
352 if (nelts & (nelts - 1))
354 fformat (stderr, "FATAL: nelts MUST be a power of 2\n");
361 void vl_msg_api_handler_no_free (void *) __attribute__ ((weak));
363 vl_msg_api_handler_no_free (void *v)
367 /* To be called by vlib worker threads upon startup */
369 vlib_worker_thread_init (vlib_worker_thread_t * w)
371 vlib_thread_main_t *tm = vlib_get_thread_main ();
374 * Note: disabling signals in worker threads as follows
375 * prevents the api post-mortem dump scheme from working
379 * pthread_sigmask (SIG_SETMASK, &s, 0);
383 clib_mem_set_heap (w->thread_mheap);
385 if (vec_len (tm->thread_prefix) && w->registration->short_name)
387 w->name = format (0, "%v_%s_%d%c", tm->thread_prefix,
388 w->registration->short_name, w->instance_id, '\0');
389 vlib_set_thread_name ((char *) w->name);
392 if (!w->registration->use_pthreads)
395 /* Initial barrier sync, for both worker and i/o threads */
396 clib_atomic_fetch_add (vlib_worker_threads->workers_at_barrier, 1);
398 while (*vlib_worker_threads->wait_at_barrier)
401 clib_atomic_fetch_add (vlib_worker_threads->workers_at_barrier, -1);
406 vlib_worker_thread_bootstrap_fn (void *arg)
409 vlib_worker_thread_t *w = arg;
412 w->lwp = syscall (SYS_gettid);
413 w->thread_id = pthread_self ();
415 __os_thread_index = w - vlib_worker_threads;
417 vm = vlib_global_main.vlib_mains[__os_thread_index];
419 vlib_process_start_switch_stack (vm, 0);
420 rv = (void *) clib_calljmp
421 ((uword (*)(uword)) w->thread_function,
422 (uword) arg, w->thread_stack + VLIB_THREAD_STACK_SIZE);
423 /* NOTREACHED, we hope */
428 vlib_get_thread_core_numa (vlib_worker_thread_t * w, unsigned cpu_id)
430 const char *sys_cpu_path = "/sys/devices/system/cpu/cpu";
431 const char *sys_node_path = "/sys/devices/system/node/node";
432 clib_bitmap_t *nbmp = 0, *cbmp = 0;
435 int core_id = -1, numa_id = -1;
437 p = format (p, "%s%u/topology/core_id%c", sys_cpu_path, cpu_id, 0);
438 clib_sysfs_read ((char *) p, "%d", &core_id);
439 vec_reset_length (p);
442 clib_sysfs_read ("/sys/devices/system/node/online", "%U",
443 unformat_bitmap_list, &nbmp);
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;
466 void *(*fp_arg) (void *) = fp;
470 vlib_get_thread_core_numa (w, cpu_id);
472 /* Set up NUMA-bound heap if indicated */
473 if (mm->per_numa_mheaps[w->numa_id] == 0)
475 /* If the user requested a NUMA heap, create it... */
476 if (tm->numa_heap_size)
478 clib_mem_set_numa_affinity (w->numa_id, 1 /* force */ );
479 numa_heap = clib_mem_create_heap (0 /* DIY */ , tm->numa_heap_size,
481 "numa %u heap", w->numa_id);
482 clib_mem_set_default_numa_affinity ();
483 mm->per_numa_mheaps[w->numa_id] = numa_heap;
487 /* Or, use the main heap */
488 mm->per_numa_mheaps[w->numa_id] = w->thread_mheap;
492 if (tm->cb.vlib_launch_thread_cb && !w->registration->use_pthreads)
493 return tm->cb.vlib_launch_thread_cb (fp, (void *) w, cpu_id);
499 CPU_SET (cpu_id, &cpuset);
501 if (pthread_create (&worker, NULL /* attr */ , fp_arg, (void *) w))
502 return clib_error_return_unix (0, "pthread_create");
504 if (pthread_setaffinity_np (worker, sizeof (cpu_set_t), &cpuset))
505 return clib_error_return_unix (0, "pthread_setaffinity_np");
511 static clib_error_t *
512 start_workers (vlib_main_t * vm)
514 vlib_global_main_t *vgm = vlib_get_global_main ();
516 vlib_worker_thread_t *w;
517 vlib_main_t *vm_clone;
519 vlib_thread_main_t *tm = &vlib_thread_main;
520 vlib_thread_registration_t *tr;
521 vlib_node_runtime_t *rt;
522 u32 n_vlib_mains = tm->n_vlib_mains;
523 u32 worker_thread_index;
524 clib_mem_heap_t *main_heap = clib_mem_get_per_cpu_heap ();
525 vlib_stats_register_mem_heap (main_heap);
527 vec_reset_length (vlib_worker_threads);
529 /* Set up the main thread */
530 vec_add2_aligned (vlib_worker_threads, w, 1, CLIB_CACHE_LINE_BYTES);
531 w->elog_track.name = "main thread";
532 elog_track_register (vlib_get_elog_main (), &w->elog_track);
534 if (vec_len (tm->thread_prefix))
536 w->name = format (0, "%v_main%c", tm->thread_prefix, '\0');
537 vlib_set_thread_name ((char *) w->name);
540 vgm->elog_main.lock =
541 clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES, CLIB_CACHE_LINE_BYTES);
542 vgm->elog_main.lock[0] = 0;
544 clib_callback_data_init (&vm->vlib_node_runtime_perf_callbacks,
545 &vm->worker_thread_main_loop_callback_lock);
547 vec_validate_aligned (vgm->vlib_mains, n_vlib_mains - 1,
548 CLIB_CACHE_LINE_BYTES);
549 _vec_len (vgm->vlib_mains) = 0;
550 vec_add1_aligned (vgm->vlib_mains, vm, CLIB_CACHE_LINE_BYTES);
552 if (n_vlib_mains > 1)
554 vlib_worker_threads->wait_at_barrier =
555 clib_mem_alloc_aligned (sizeof (u32), CLIB_CACHE_LINE_BYTES);
556 vlib_worker_threads->workers_at_barrier =
557 clib_mem_alloc_aligned (sizeof (u32), CLIB_CACHE_LINE_BYTES);
559 vlib_worker_threads->node_reforks_required =
560 clib_mem_alloc_aligned (sizeof (u32), CLIB_CACHE_LINE_BYTES);
562 /* We'll need the rpc vector lock... */
563 clib_spinlock_init (&vm->pending_rpc_lock);
565 /* Ask for an initial barrier sync */
566 *vlib_worker_threads->workers_at_barrier = 0;
567 *vlib_worker_threads->wait_at_barrier = 1;
569 /* Without update or refork */
570 *vlib_worker_threads->node_reforks_required = 0;
571 vgm->need_vlib_worker_thread_node_runtime_update = 0;
574 vm->barrier_epoch = 0;
575 vm->barrier_no_close_before = 0;
577 worker_thread_index = 1;
578 clib_spinlock_init (&vm->worker_thread_main_loop_callback_lock);
580 for (i = 0; i < vec_len (tm->registrations); i++)
582 vlib_node_main_t *nm, *nm_clone;
585 tr = tm->registrations[i];
590 for (k = 0; k < tr->count; k++)
594 vec_add2 (vlib_worker_threads, w, 1);
595 /* Currently unused, may not really work */
597 w->thread_mheap = clib_mem_create_heap (0, tr->mheap_size,
602 w->thread_mheap = main_heap;
605 vlib_thread_stack_init (w - vlib_worker_threads);
606 w->thread_function = tr->function;
607 w->thread_function_arg = w;
609 w->registration = tr;
612 (char *) format (0, "%s %d", tr->name, k + 1);
613 vec_add1 (w->elog_track.name, 0);
614 elog_track_register (vlib_get_elog_main (), &w->elog_track);
616 if (tr->no_data_structure_clone)
619 /* Fork vlib_global_main et al. Look for bugs here */
620 oldheap = clib_mem_set_heap (w->thread_mheap);
622 vm_clone = clib_mem_alloc_aligned (sizeof (*vm_clone),
623 CLIB_CACHE_LINE_BYTES);
624 clib_memcpy (vm_clone, vlib_get_first_main (),
627 vm_clone->thread_index = worker_thread_index;
628 vm_clone->heap_base = w->thread_mheap;
629 vm_clone->heap_aligned_base = (void *)
630 (((uword) w->thread_mheap) & ~(VLIB_FRAME_ALIGN - 1));
631 vm_clone->pending_rpc_requests = 0;
632 vec_validate (vm_clone->pending_rpc_requests, 0);
633 _vec_len (vm_clone->pending_rpc_requests) = 0;
634 clib_memset (&vm_clone->random_buffer, 0,
635 sizeof (vm_clone->random_buffer));
637 (&vm_clone->worker_thread_main_loop_callback_lock);
638 clib_callback_data_init
639 (&vm_clone->vlib_node_runtime_perf_callbacks,
640 &vm_clone->worker_thread_main_loop_callback_lock);
642 nm = &vlib_get_first_main ()->node_main;
643 nm_clone = &vm_clone->node_main;
644 /* fork next frames array, preserving node runtime indices */
645 nm_clone->next_frames = vec_dup_aligned (nm->next_frames,
646 CLIB_CACHE_LINE_BYTES);
647 for (j = 0; j < vec_len (nm_clone->next_frames); j++)
649 vlib_next_frame_t *nf = &nm_clone->next_frames[j];
650 u32 save_node_runtime_index;
653 save_node_runtime_index = nf->node_runtime_index;
654 save_flags = nf->flags & VLIB_FRAME_NO_FREE_AFTER_DISPATCH;
655 vlib_next_frame_init (nf);
656 nf->node_runtime_index = save_node_runtime_index;
657 nf->flags = save_flags;
660 /* fork the frame dispatch queue */
661 nm_clone->pending_frames = 0;
662 vec_validate (nm_clone->pending_frames, 10);
663 _vec_len (nm_clone->pending_frames) = 0;
668 /* Allocate all nodes in single block for speed */
669 n = clib_mem_alloc_no_fail (vec_len (nm->nodes) * sizeof (*n));
671 for (j = 0; j < vec_len (nm->nodes); j++)
673 clib_memcpy (n, nm->nodes[j], sizeof (*n));
674 /* none of the copied nodes have enqueue rights given out */
675 n->owner_node_index = VLIB_INVALID_NODE_INDEX;
676 clib_memset (&n->stats_total, 0, sizeof (n->stats_total));
677 clib_memset (&n->stats_last_clear, 0,
678 sizeof (n->stats_last_clear));
679 vec_add1 (nm_clone->nodes, n);
682 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL] =
683 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL],
684 CLIB_CACHE_LINE_BYTES);
686 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL])
688 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
689 rt->thread_index = vm_clone->thread_index;
690 /* copy initial runtime_data from node */
691 if (n->runtime_data && n->runtime_data_bytes > 0)
692 clib_memcpy (rt->runtime_data, n->runtime_data,
693 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
694 n->runtime_data_bytes));
697 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT] =
698 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_INPUT],
699 CLIB_CACHE_LINE_BYTES);
700 clib_interrupt_init (
701 &nm_clone->interrupts,
702 vec_len (nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT]));
703 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT])
705 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
706 rt->thread_index = vm_clone->thread_index;
707 /* copy initial runtime_data from node */
708 if (n->runtime_data && n->runtime_data_bytes > 0)
709 clib_memcpy (rt->runtime_data, n->runtime_data,
710 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
711 n->runtime_data_bytes));
714 nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT] =
715 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT],
716 CLIB_CACHE_LINE_BYTES);
718 nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT])
720 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
721 rt->thread_index = vm_clone->thread_index;
722 /* copy initial runtime_data from node */
723 if (n->runtime_data && n->runtime_data_bytes > 0)
724 clib_memcpy (rt->runtime_data, n->runtime_data,
725 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
726 n->runtime_data_bytes));
729 nm_clone->processes = vec_dup_aligned (nm->processes,
730 CLIB_CACHE_LINE_BYTES);
732 /* Create per-thread frame freelist */
733 nm_clone->frame_sizes = vec_new (vlib_frame_size_t, 1);
734 #ifdef VLIB_SUPPORTS_ARBITRARY_SCALAR_SIZES
735 nm_clone->frame_size_hash = hash_create (0, sizeof (uword));
737 nm_clone->node_by_error = nm->node_by_error;
739 /* Packet trace buffers are guaranteed to be empty, nothing to do here */
741 clib_mem_set_heap (oldheap);
742 vec_add1_aligned (vgm->vlib_mains, vm_clone,
743 CLIB_CACHE_LINE_BYTES);
745 /* Switch to the stats segment ... */
746 void *oldheap = vlib_stats_push_heap (0);
747 vm_clone->error_main.counters =
748 vec_dup_aligned (vlib_get_first_main ()->error_main.counters,
749 CLIB_CACHE_LINE_BYTES);
750 vlib_stats_pop_heap2 (vm_clone->error_main.counters,
751 worker_thread_index, oldheap, 1);
753 vm_clone->error_main.counters_last_clear = vec_dup_aligned (
754 vlib_get_first_main ()->error_main.counters_last_clear,
755 CLIB_CACHE_LINE_BYTES);
757 worker_thread_index++;
763 /* only have non-data-structure copy threads to create... */
764 for (i = 0; i < vec_len (tm->registrations); i++)
766 tr = tm->registrations[i];
768 for (j = 0; j < tr->count; j++)
770 vec_add2 (vlib_worker_threads, w, 1);
773 w->thread_mheap = clib_mem_create_heap (0, tr->mheap_size,
779 w->thread_mheap = main_heap;
781 vlib_thread_stack_init (w - vlib_worker_threads);
782 w->thread_function = tr->function;
783 w->thread_function_arg = w;
786 (char *) format (0, "%s %d", tr->name, j + 1);
787 w->registration = tr;
788 vec_add1 (w->elog_track.name, 0);
789 elog_track_register (vlib_get_elog_main (), &w->elog_track);
794 worker_thread_index = 1;
796 for (i = 0; i < vec_len (tm->registrations); i++)
801 tr = tm->registrations[i];
803 if (tr->use_pthreads || tm->use_pthreads)
805 for (j = 0; j < tr->count; j++)
807 w = vlib_worker_threads + worker_thread_index++;
808 err = vlib_launch_thread_int (vlib_worker_thread_bootstrap_fn,
811 clib_error_report (err);
818 clib_bitmap_foreach (c, tr->coremask) {
819 w = vlib_worker_threads + worker_thread_index++;
820 err = vlib_launch_thread_int (vlib_worker_thread_bootstrap_fn,
823 clib_error_report (err);
828 vlib_worker_thread_barrier_sync (vm);
829 vlib_worker_thread_barrier_release (vm);
833 VLIB_MAIN_LOOP_ENTER_FUNCTION (start_workers);
837 worker_thread_node_runtime_update_internal (void)
841 vlib_node_main_t *nm, *nm_clone;
842 vlib_main_t *vm_clone;
843 vlib_node_runtime_t *rt;
845 ASSERT (vlib_get_thread_index () == 0);
847 vm = vlib_get_first_main ();
850 ASSERT (*vlib_worker_threads->wait_at_barrier == 1);
853 * Scrape all runtime stats, so we don't lose node runtime(s) with
854 * pending counts, or throw away worker / io thread counts.
856 for (j = 0; j < vec_len (nm->nodes); j++)
860 vlib_node_sync_stats (vm, n);
863 for (i = 1; i < vlib_get_n_threads (); i++)
867 vm_clone = vlib_get_main_by_index (i);
868 nm_clone = &vm_clone->node_main;
870 for (j = 0; j < vec_len (nm_clone->nodes); j++)
872 n = nm_clone->nodes[j];
874 rt = vlib_node_get_runtime (vm_clone, n->index);
875 vlib_node_runtime_sync_stats (vm_clone, rt, 0, 0, 0);
879 /* Per-worker clone rebuilds are now done on each thread */
884 vlib_worker_thread_node_refork (void)
886 vlib_main_t *vm, *vm_clone;
887 vlib_node_main_t *nm, *nm_clone;
888 vlib_node_t **old_nodes_clone;
889 vlib_node_runtime_t *rt, *old_rt;
891 vlib_node_t *new_n_clone;
895 vm = vlib_get_first_main ();
897 vm_clone = vlib_get_main ();
898 nm_clone = &vm_clone->node_main;
900 /* Re-clone error heap */
901 u64 *old_counters = vm_clone->error_main.counters;
902 u64 *old_counters_all_clear = vm_clone->error_main.counters_last_clear;
904 clib_memcpy_fast (&vm_clone->error_main, &vm->error_main,
905 sizeof (vm->error_main));
906 j = vec_len (vm->error_main.counters) - 1;
908 /* Switch to the stats segment ... */
909 void *oldheap = vlib_stats_push_heap (0);
910 vec_validate_aligned (old_counters, j, CLIB_CACHE_LINE_BYTES);
911 vm_clone->error_main.counters = old_counters;
912 vlib_stats_pop_heap2 (vm_clone->error_main.counters, vm_clone->thread_index,
915 vec_validate_aligned (old_counters_all_clear, j, CLIB_CACHE_LINE_BYTES);
916 vm_clone->error_main.counters_last_clear = old_counters_all_clear;
918 nm_clone = &vm_clone->node_main;
919 vec_free (nm_clone->next_frames);
920 nm_clone->next_frames = vec_dup_aligned (nm->next_frames,
921 CLIB_CACHE_LINE_BYTES);
923 for (j = 0; j < vec_len (nm_clone->next_frames); j++)
925 vlib_next_frame_t *nf = &nm_clone->next_frames[j];
926 u32 save_node_runtime_index;
929 save_node_runtime_index = nf->node_runtime_index;
930 save_flags = nf->flags & VLIB_FRAME_NO_FREE_AFTER_DISPATCH;
931 vlib_next_frame_init (nf);
932 nf->node_runtime_index = save_node_runtime_index;
933 nf->flags = save_flags;
936 old_nodes_clone = nm_clone->nodes;
941 /* Allocate all nodes in single block for speed */
943 clib_mem_alloc_no_fail (vec_len (nm->nodes) * sizeof (*new_n_clone));
944 for (j = 0; j < vec_len (nm->nodes); j++)
946 vlib_node_t *new_n = nm->nodes[j];
948 clib_memcpy_fast (new_n_clone, new_n, sizeof (*new_n));
949 /* none of the copied nodes have enqueue rights given out */
950 new_n_clone->owner_node_index = VLIB_INVALID_NODE_INDEX;
952 if (j >= vec_len (old_nodes_clone))
954 /* new node, set to zero */
955 clib_memset (&new_n_clone->stats_total, 0,
956 sizeof (new_n_clone->stats_total));
957 clib_memset (&new_n_clone->stats_last_clear, 0,
958 sizeof (new_n_clone->stats_last_clear));
962 vlib_node_t *old_n_clone = old_nodes_clone[j];
963 /* Copy stats if the old data is valid */
964 clib_memcpy_fast (&new_n_clone->stats_total,
965 &old_n_clone->stats_total,
966 sizeof (new_n_clone->stats_total));
967 clib_memcpy_fast (&new_n_clone->stats_last_clear,
968 &old_n_clone->stats_last_clear,
969 sizeof (new_n_clone->stats_last_clear));
971 /* keep previous node state */
972 new_n_clone->state = old_n_clone->state;
973 new_n_clone->flags = old_n_clone->flags;
975 vec_add1 (nm_clone->nodes, new_n_clone);
978 /* Free the old node clones */
979 clib_mem_free (old_nodes_clone[0]);
981 vec_free (old_nodes_clone);
984 /* re-clone internal nodes */
985 old_rt = nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL];
986 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL] =
987 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL],
988 CLIB_CACHE_LINE_BYTES);
990 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL])
992 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
993 rt->thread_index = vm_clone->thread_index;
994 /* copy runtime_data, will be overwritten later for existing rt */
995 if (n->runtime_data && n->runtime_data_bytes > 0)
996 clib_memcpy_fast (rt->runtime_data, n->runtime_data,
997 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
998 n->runtime_data_bytes));
1001 for (j = 0; j < vec_len (old_rt); j++)
1003 rt = vlib_node_get_runtime (vm_clone, old_rt[j].node_index);
1004 rt->state = old_rt[j].state;
1005 rt->flags = old_rt[j].flags;
1006 clib_memcpy_fast (rt->runtime_data, old_rt[j].runtime_data,
1007 VLIB_NODE_RUNTIME_DATA_SIZE);
1012 /* re-clone input nodes */
1013 old_rt = nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT];
1014 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT] =
1015 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_INPUT],
1016 CLIB_CACHE_LINE_BYTES);
1017 clib_interrupt_resize (
1018 &nm_clone->interrupts,
1019 vec_len (nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT]));
1021 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT])
1023 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
1024 rt->thread_index = vm_clone->thread_index;
1025 /* copy runtime_data, will be overwritten later for existing rt */
1026 if (n->runtime_data && n->runtime_data_bytes > 0)
1027 clib_memcpy_fast (rt->runtime_data, n->runtime_data,
1028 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
1029 n->runtime_data_bytes));
1032 for (j = 0; j < vec_len (old_rt); j++)
1034 rt = vlib_node_get_runtime (vm_clone, old_rt[j].node_index);
1035 rt->state = old_rt[j].state;
1036 rt->flags = old_rt[j].flags;
1037 clib_memcpy_fast (rt->runtime_data, old_rt[j].runtime_data,
1038 VLIB_NODE_RUNTIME_DATA_SIZE);
1043 /* re-clone pre-input nodes */
1044 old_rt = nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT];
1045 nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT] =
1046 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT],
1047 CLIB_CACHE_LINE_BYTES);
1049 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT])
1051 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
1052 rt->thread_index = vm_clone->thread_index;
1053 /* copy runtime_data, will be overwritten later for existing rt */
1054 if (n->runtime_data && n->runtime_data_bytes > 0)
1055 clib_memcpy_fast (rt->runtime_data, n->runtime_data,
1056 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
1057 n->runtime_data_bytes));
1060 for (j = 0; j < vec_len (old_rt); j++)
1062 rt = vlib_node_get_runtime (vm_clone, old_rt[j].node_index);
1063 rt->state = old_rt[j].state;
1064 rt->flags = old_rt[j].flags;
1065 clib_memcpy_fast (rt->runtime_data, old_rt[j].runtime_data,
1066 VLIB_NODE_RUNTIME_DATA_SIZE);
1071 nm_clone->processes = vec_dup_aligned (nm->processes,
1072 CLIB_CACHE_LINE_BYTES);
1073 nm_clone->node_by_error = nm->node_by_error;
1077 vlib_worker_thread_node_runtime_update (void)
1080 * Make a note that we need to do a node runtime update
1081 * prior to releasing the barrier.
1083 vlib_global_main.need_vlib_worker_thread_node_runtime_update = 1;
1087 unformat_sched_policy (unformat_input_t * input, va_list * args)
1089 u32 *r = va_arg (*args, u32 *);
1092 #define _(v,f,s) else if (unformat (input, s)) *r = SCHED_POLICY_##f;
1093 foreach_sched_policy
1100 static clib_error_t *
1101 cpu_config (vlib_main_t * vm, unformat_input_t * input)
1103 vlib_thread_registration_t *tr;
1105 vlib_thread_main_t *tm = &vlib_thread_main;
1110 tm->thread_registrations_by_name = hash_create_string (0, sizeof (uword));
1112 tm->n_thread_stacks = 1; /* account for main thread */
1113 tm->sched_policy = ~0;
1114 tm->sched_priority = ~0;
1115 tm->main_lcore = ~0;
1121 hash_set_mem (tm->thread_registrations_by_name, tr->name, (uword) tr);
1125 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1127 if (unformat (input, "use-pthreads"))
1128 tm->use_pthreads = 1;
1129 else if (unformat (input, "thread-prefix %v", &tm->thread_prefix))
1131 else if (unformat (input, "main-core %u", &tm->main_lcore))
1133 else if (unformat (input, "skip-cores %u", &tm->skip_cores))
1135 else if (unformat (input, "numa-heap-size %U",
1136 unformat_memory_size, &tm->numa_heap_size))
1138 else if (unformat (input, "coremask-%s %U", &name,
1139 unformat_bitmap_mask, &bitmap) ||
1140 unformat (input, "corelist-%s %U", &name,
1141 unformat_bitmap_list, &bitmap))
1143 p = hash_get_mem (tm->thread_registrations_by_name, name);
1145 return clib_error_return (0, "no such thread type '%s'", name);
1147 tr = (vlib_thread_registration_t *) p[0];
1149 if (tr->use_pthreads)
1150 return clib_error_return (0,
1151 "corelist cannot be set for '%s' threads",
1154 return clib_error_return
1155 (0, "core placement of '%s' threads is already configured",
1158 tr->coremask = bitmap;
1159 tr->count = clib_bitmap_count_set_bits (tr->coremask);
1163 (input, "scheduler-policy %U", unformat_sched_policy,
1166 else if (unformat (input, "scheduler-priority %u", &tm->sched_priority))
1168 else if (unformat (input, "%s %u", &name, &count))
1170 p = hash_get_mem (tm->thread_registrations_by_name, name);
1172 return clib_error_return (0, "no such thread type 3 '%s'", name);
1174 tr = (vlib_thread_registration_t *) p[0];
1176 if (tr->fixed_count)
1177 return clib_error_return
1178 (0, "number of '%s' threads not configurable", name);
1180 return clib_error_return
1181 (0, "number of '%s' threads is already configured", name);
1189 if (tm->sched_priority != ~0)
1191 if (tm->sched_policy == SCHED_FIFO || tm->sched_policy == SCHED_RR)
1193 u32 prio_max = sched_get_priority_max (tm->sched_policy);
1194 u32 prio_min = sched_get_priority_min (tm->sched_policy);
1195 if (tm->sched_priority > prio_max)
1196 tm->sched_priority = prio_max;
1197 if (tm->sched_priority < prio_min)
1198 tm->sched_priority = prio_min;
1202 return clib_error_return
1204 "scheduling priority (%d) is not allowed for `normal` scheduling policy",
1205 tm->sched_priority);
1210 if (!tm->thread_prefix)
1211 tm->thread_prefix = format (0, "vpp");
1215 tm->n_thread_stacks += tr->count;
1216 tm->n_pthreads += tr->count * tr->use_pthreads;
1217 tm->n_threads += tr->count * (tr->use_pthreads == 0);
1224 VLIB_EARLY_CONFIG_FUNCTION (cpu_config, "cpu");
1227 * Enforce minimum open time to minimize packet loss due to Rx overflow,
1228 * based on a test based heuristic that barrier should be open for at least
1229 * 3 time as long as it is closed (with an upper bound of 1ms because by that
1230 * point it is probably too late to make a difference)
1233 #ifndef BARRIER_MINIMUM_OPEN_LIMIT
1234 #define BARRIER_MINIMUM_OPEN_LIMIT 0.001
1237 #ifndef BARRIER_MINIMUM_OPEN_FACTOR
1238 #define BARRIER_MINIMUM_OPEN_FACTOR 3
1242 vlib_worker_thread_initial_barrier_sync_and_release (vlib_main_t * vm)
1245 f64 now = vlib_time_now (vm);
1246 u32 count = vlib_get_n_threads () - 1;
1248 /* No worker threads? */
1252 deadline = now + BARRIER_SYNC_TIMEOUT;
1253 *vlib_worker_threads->wait_at_barrier = 1;
1254 while (*vlib_worker_threads->workers_at_barrier != count)
1256 if ((now = vlib_time_now (vm)) > deadline)
1258 fformat (stderr, "%s: worker thread deadlock\n", __FUNCTION__);
1263 *vlib_worker_threads->wait_at_barrier = 0;
1267 * Return true if the wroker thread barrier is held
1270 vlib_worker_thread_barrier_held (void)
1272 if (vlib_get_n_threads () < 2)
1275 return (*vlib_worker_threads->wait_at_barrier == 1);
1279 vlib_worker_thread_barrier_sync_int (vlib_main_t * vm, const char *func_name)
1286 f64 max_vector_rate;
1290 if (vlib_get_n_threads () < 2)
1293 ASSERT (vlib_get_thread_index () == 0);
1295 vlib_worker_threads[0].barrier_caller = func_name;
1296 count = vlib_get_n_threads () - 1;
1298 /* Record entry relative to last close */
1299 now = vlib_time_now (vm);
1300 t_entry = now - vm->barrier_epoch;
1302 /* Tolerate recursive calls */
1303 if (++vlib_worker_threads[0].recursion_level > 1)
1305 barrier_trace_sync_rec (t_entry);
1309 if (PREDICT_FALSE (vec_len (vm->barrier_perf_callbacks) != 0))
1310 clib_call_callbacks (vm->barrier_perf_callbacks, vm,
1311 vm->clib_time.last_cpu_time, 0 /* enter */ );
1314 * Need data to decide if we're working hard enough to honor
1315 * the barrier hold-down timer.
1317 max_vector_rate = 0.0;
1318 for (i = 1; i < vlib_get_n_threads (); i++)
1320 vlib_main_t *ovm = vlib_get_main_by_index (i);
1321 max_vector_rate = clib_max (max_vector_rate,
1322 (f64) vlib_last_vectors_per_main_loop (ovm));
1325 vlib_worker_threads[0].barrier_sync_count++;
1327 /* Enforce minimum barrier open time to minimize packet loss */
1328 ASSERT (vm->barrier_no_close_before <= (now + BARRIER_MINIMUM_OPEN_LIMIT));
1331 * If any worker thread seems busy, which we define
1332 * as a vector rate above 10, we enforce the barrier hold-down timer
1334 if (max_vector_rate > 10.0)
1338 now = vlib_time_now (vm);
1339 /* Barrier hold-down timer expired? */
1340 if (now >= vm->barrier_no_close_before)
1342 if ((vm->barrier_no_close_before - now)
1343 > (2.0 * BARRIER_MINIMUM_OPEN_LIMIT))
1346 ("clock change: would have waited for %.4f seconds",
1347 (vm->barrier_no_close_before - now));
1352 /* Record time of closure */
1353 t_open = now - vm->barrier_epoch;
1354 vm->barrier_epoch = now;
1356 deadline = now + BARRIER_SYNC_TIMEOUT;
1358 *vlib_worker_threads->wait_at_barrier = 1;
1359 while (*vlib_worker_threads->workers_at_barrier != count)
1361 if ((now = vlib_time_now (vm)) > deadline)
1363 fformat (stderr, "%s: worker thread deadlock\n", __FUNCTION__);
1368 t_closed = now - vm->barrier_epoch;
1370 barrier_trace_sync (t_entry, t_open, t_closed);
1375 vlib_worker_thread_barrier_release (vlib_main_t * vm)
1377 vlib_global_main_t *vgm = vlib_get_global_main ();
1383 f64 t_update_main = 0.0;
1384 int refork_needed = 0;
1386 if (vlib_get_n_threads () < 2)
1389 ASSERT (vlib_get_thread_index () == 0);
1392 now = vlib_time_now (vm);
1393 t_entry = now - vm->barrier_epoch;
1395 if (--vlib_worker_threads[0].recursion_level > 0)
1397 barrier_trace_release_rec (t_entry);
1401 /* Update (all) node runtimes before releasing the barrier, if needed */
1402 if (vgm->need_vlib_worker_thread_node_runtime_update)
1405 * Lock stat segment here, so we's safe when
1406 * rebuilding the stat segment node clones from the
1409 vlib_stat_segment_lock ();
1411 /* Do stats elements on main thread */
1412 worker_thread_node_runtime_update_internal ();
1413 vgm->need_vlib_worker_thread_node_runtime_update = 0;
1415 /* Do per thread rebuilds in parallel */
1417 clib_atomic_fetch_add (vlib_worker_threads->node_reforks_required,
1418 (vlib_get_n_threads () - 1));
1419 now = vlib_time_now (vm);
1420 t_update_main = now - vm->barrier_epoch;
1423 deadline = now + BARRIER_SYNC_TIMEOUT;
1426 * Note when we let go of the barrier.
1427 * Workers can use this to derive a reasonably accurate
1428 * time offset. See vlib_time_now(...)
1430 vm->time_last_barrier_release = vlib_time_now (vm);
1431 CLIB_MEMORY_STORE_BARRIER ();
1433 *vlib_worker_threads->wait_at_barrier = 0;
1435 while (*vlib_worker_threads->workers_at_barrier > 0)
1437 if ((now = vlib_time_now (vm)) > deadline)
1439 fformat (stderr, "%s: worker thread deadlock\n", __FUNCTION__);
1444 /* Wait for reforks before continuing */
1447 now = vlib_time_now (vm);
1449 deadline = now + BARRIER_SYNC_TIMEOUT;
1451 while (*vlib_worker_threads->node_reforks_required > 0)
1453 if ((now = vlib_time_now (vm)) > deadline)
1455 fformat (stderr, "%s: worker thread refork deadlock\n",
1460 vlib_stat_segment_unlock ();
1463 t_closed_total = now - vm->barrier_epoch;
1465 minimum_open = t_closed_total * BARRIER_MINIMUM_OPEN_FACTOR;
1467 if (minimum_open > BARRIER_MINIMUM_OPEN_LIMIT)
1469 minimum_open = BARRIER_MINIMUM_OPEN_LIMIT;
1472 vm->barrier_no_close_before = now + minimum_open;
1474 /* Record barrier epoch (used to enforce minimum open time) */
1475 vm->barrier_epoch = now;
1477 barrier_trace_release (t_entry, t_closed_total, t_update_main);
1479 if (PREDICT_FALSE (vec_len (vm->barrier_perf_callbacks) != 0))
1480 clib_call_callbacks (vm->barrier_perf_callbacks, vm,
1481 vm->clib_time.last_cpu_time, 1 /* leave */ );
1485 * Wait until each of the workers has been once around the track
1488 vlib_worker_wait_one_loop (void)
1490 vlib_global_main_t *vgm = vlib_get_global_main ();
1491 ASSERT (vlib_get_thread_index () == 0);
1493 if (vlib_get_n_threads () < 2)
1496 if (vlib_worker_thread_barrier_held ())
1502 vec_validate (counts, vlib_get_n_threads () - 1);
1504 /* record the current loop counts */
1505 vec_foreach_index (ii, vgm->vlib_mains)
1506 counts[ii] = vgm->vlib_mains[ii]->main_loop_count;
1508 /* spin until each changes, apart from the main thread, or we'd be
1510 for (ii = 1; ii < vec_len (counts); ii++)
1512 while (counts[ii] == vgm->vlib_mains[ii]->main_loop_count)
1521 vlib_worker_thread_fn (void *arg)
1523 vlib_global_main_t *vgm = vlib_get_global_main ();
1524 vlib_worker_thread_t *w = (vlib_worker_thread_t *) arg;
1525 vlib_thread_main_t *tm = vlib_get_thread_main ();
1526 vlib_main_t *vm = vlib_get_main ();
1529 vlib_process_finish_switch_stack (vm);
1531 ASSERT (vm->thread_index == vlib_get_thread_index ());
1533 vlib_worker_thread_init (w);
1534 clib_time_init (&vm->clib_time);
1535 clib_mem_set_heap (w->thread_mheap);
1537 vm->worker_init_functions_called = hash_create (0, 0);
1539 e = vlib_call_init_exit_functions_no_sort (
1540 vm, &vgm->worker_init_function_registrations, 1 /* call_once */,
1543 clib_error_report (e);
1545 /* Wait until the dpdk init sequence is complete */
1546 while (tm->extern_thread_mgmt && tm->worker_thread_release == 0)
1547 vlib_worker_thread_barrier_check ();
1549 vlib_worker_loop (vm);
1553 VLIB_REGISTER_THREAD (worker_thread_reg, static) = {
1556 .function = vlib_worker_thread_fn,
1561 vlib_frame_queue_main_init (u32 node_index, u32 frame_queue_nelts)
1563 vlib_thread_main_t *tm = vlib_get_thread_main ();
1564 vlib_frame_queue_main_t *fqm;
1565 vlib_frame_queue_t *fq;
1569 if (frame_queue_nelts == 0)
1570 frame_queue_nelts = FRAME_QUEUE_MAX_NELTS;
1572 num_threads = 1 /* main thread */ + tm->n_threads;
1573 ASSERT (frame_queue_nelts >= 8 + num_threads);
1575 vec_add2 (tm->frame_queue_mains, fqm, 1);
1577 fqm->node_index = node_index;
1578 fqm->frame_queue_nelts = frame_queue_nelts;
1580 vec_validate (fqm->vlib_frame_queues, tm->n_vlib_mains - 1);
1581 _vec_len (fqm->vlib_frame_queues) = 0;
1582 for (i = 0; i < tm->n_vlib_mains; i++)
1584 fq = vlib_frame_queue_alloc (frame_queue_nelts);
1585 vec_add1 (fqm->vlib_frame_queues, fq);
1588 return (fqm - tm->frame_queue_mains);
1592 vlib_thread_cb_register (struct vlib_main_t *vm, vlib_thread_callbacks_t * cb)
1594 vlib_thread_main_t *tm = vlib_get_thread_main ();
1596 if (tm->extern_thread_mgmt)
1599 tm->cb.vlib_launch_thread_cb = cb->vlib_launch_thread_cb;
1600 tm->extern_thread_mgmt = 1;
1605 vlib_process_signal_event_mt_helper (vlib_process_signal_event_mt_args_t *
1608 ASSERT (vlib_get_thread_index () == 0);
1609 vlib_process_signal_event (vlib_get_main (), args->node_index,
1610 args->type_opaque, args->data);
1613 void *rpc_call_main_thread_cb_fn;
1616 vlib_rpc_call_main_thread (void *callback, u8 * args, u32 arg_size)
1618 if (rpc_call_main_thread_cb_fn)
1620 void (*fp) (void *, u8 *, u32) = rpc_call_main_thread_cb_fn;
1621 (*fp) (callback, args, arg_size);
1624 clib_warning ("BUG: rpc_call_main_thread_cb_fn NULL!");
1628 threads_init (vlib_main_t * vm)
1633 VLIB_INIT_FUNCTION (threads_init);
1636 static clib_error_t *
1637 show_clock_command_fn (vlib_main_t * vm,
1638 unformat_input_t * input, vlib_cli_command_t * cmd)
1641 clib_timebase_t _tb, *tb = &_tb;
1643 (void) unformat (input, "verbose %=", &verbose, 1);
1645 clib_timebase_init (tb, 0 /* GMT */ , CLIB_TIMEBASE_DAYLIGHT_NONE,
1648 vlib_cli_output (vm, "%U, %U GMT", format_clib_time, &vm->clib_time,
1649 verbose, format_clib_timebase_time,
1650 clib_timebase_now (tb));
1652 vlib_cli_output (vm, "Time last barrier release %.9f",
1653 vm->time_last_barrier_release);
1655 foreach_vlib_main ()
1657 vlib_cli_output (vm, "%d: %U", this_vlib_main->thread_index,
1658 format_clib_time, &this_vlib_main->clib_time, verbose);
1660 vlib_cli_output (vm, "Thread %d offset %.9f error %.9f",
1661 this_vlib_main->thread_index,
1662 this_vlib_main->time_offset,
1663 vm->time_last_barrier_release -
1664 this_vlib_main->time_last_barrier_release);
1670 VLIB_CLI_COMMAND (f_command, static) =
1672 .path = "show clock",
1673 .short_help = "show clock",
1674 .function = show_clock_command_fn,
1678 vlib_thread_main_t *
1679 vlib_get_thread_main_not_inline (void)
1681 return vlib_get_thread_main ();
1685 * fd.io coding-style-patch-verification: ON
1688 * eval: (c-set-style "gnu")