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 uword *avail_cpu, *affinity_cpu;
188 u32 stats_num_worker_threads_dir_index;
190 stats_num_worker_threads_dir_index =
191 vlib_stats_add_gauge ("/sys/num_worker_threads");
192 ASSERT (stats_num_worker_threads_dir_index != ~0);
194 /* get bitmaps of active cpu cores and sockets */
195 tm->cpu_core_bitmap = os_get_online_cpu_core_bitmap ();
196 tm->cpu_socket_bitmap = os_get_online_cpu_node_bitmap ();
198 /* get bitmap of active cpu cores vpp has affinity to */
200 tm->cpu_affinity_bitmap = os_get_cpu_affinity_bitmap (pid);
202 /* if fetching affinity fails, return online cpu core bmp */
203 if (tm->cpu_affinity_bitmap == 0)
204 tm->cpu_affinity_bitmap = os_get_online_cpu_core_bitmap ();
206 avail_cpu = clib_bitmap_dup (tm->cpu_core_bitmap);
207 affinity_cpu = clib_bitmap_dup (tm->cpu_affinity_bitmap);
210 n_cpus = clib_bitmap_count_set_bits (avail_cpu);
211 if (tm->skip_cores >= n_cpus)
212 return clib_error_return (0, "skip-core greater than available cpus");
213 n_cpus = clib_bitmap_count_set_bits (affinity_cpu);
214 if (tm->skip_cores >= n_cpus)
215 return clib_error_return (0, "skip-core greater than affinity cpus");
217 for (i = 0; i < tm->skip_cores; i++)
220 c = clib_bitmap_first_set (avail_cpu);
222 return clib_error_return (0, "no available cpus to skip");
224 avail_cpu = clib_bitmap_set (avail_cpu, c, 0);
226 c = clib_bitmap_first_set (affinity_cpu);
228 return clib_error_return (0, "no available env cpus to skip");
230 affinity_cpu = clib_bitmap_set (affinity_cpu, c, 0);
233 /* grab cpu for main thread */
234 if (tm->main_lcore != ~0)
236 if (clib_bitmap_get (avail_cpu, tm->main_lcore) == 0)
237 return clib_error_return (0, "cpu %u is not available to be used"
238 " for the main thread", tm->main_lcore);
239 avail_cpu = clib_bitmap_set (avail_cpu, tm->main_lcore, 0);
240 affinity_cpu = clib_bitmap_set (affinity_cpu, tm->main_lcore, 0);
242 /* if auto enabled, grab first cpu vpp has affinity to for main thread */
243 else if (tm->use_main_core_auto)
245 uword c = clib_bitmap_first_set (affinity_cpu);
249 avail_cpu = clib_bitmap_set (avail_cpu, tm->main_lcore, 0);
250 affinity_cpu = clib_bitmap_set (affinity_cpu, tm->main_lcore, 0);
253 /* assume that there is socket 0 only if there is no data from sysfs */
254 if (!tm->cpu_socket_bitmap)
255 tm->cpu_socket_bitmap = clib_bitmap_set (0, 0, 1);
257 /* pin main thread to main_lcore */
258 if (tm->main_lcore != ~0)
262 CPU_SET (tm->main_lcore, &cpuset);
263 if (pthread_setaffinity_np (pthread_self (), sizeof (cpu_set_t),
266 return clib_error_return (0, "could not pin main thread to cpu %u",
271 /* Set up thread 0 */
272 vec_validate_aligned (vlib_worker_threads, 0, CLIB_CACHE_LINE_BYTES);
273 vec_set_len (vlib_worker_threads, 1);
274 w = vlib_worker_threads;
275 w->thread_mheap = clib_mem_get_heap ();
276 w->thread_stack = vlib_thread_stacks[0];
277 w->cpu_id = tm->main_lcore;
279 w->lwp = pthread_getthreadid_np ();
281 w->lwp = syscall (SYS_gettid);
282 #endif /* __FreeBSD__ */
283 w->thread_id = pthread_self ();
284 tm->n_vlib_mains = 1;
286 vlib_get_thread_core_numa (w, w->cpu_id);
288 if (tm->sched_policy != ~0)
290 struct sched_param sched_param;
291 if (!sched_getparam (w->lwp, &sched_param))
293 if (tm->sched_priority != ~0)
294 sched_param.sched_priority = tm->sched_priority;
295 sched_setscheduler (w->lwp, tm->sched_policy, &sched_param);
299 /* assign threads to cores and set n_vlib_mains */
304 vec_add1 (tm->registrations, tr);
308 vec_sort_with_function (tm->registrations, sort_registrations_by_no_clone);
310 for (i = 0; i < vec_len (tm->registrations); i++)
313 tr = tm->registrations[i];
314 tr->first_index = first_index;
315 first_index += tr->count;
316 n_vlib_mains += (tr->no_data_structure_clone == 0) ? tr->count : 0;
318 /* construct coremask */
319 if (tr->use_pthreads || !tr->count)
325 clib_bitmap_foreach (c, tr->coremask) {
326 if (clib_bitmap_get(avail_cpu, c) == 0)
327 return clib_error_return (0, "cpu %u is not available to be used"
328 " for the '%s' thread",c, tr->name);
330 avail_cpu = clib_bitmap_set(avail_cpu, c, 0);
335 /* for automatic pinning, use cpu affinity list */
337 n_env_cpu = clib_bitmap_count_set_bits (affinity_cpu);
339 if (n_env_cpu < tr->count)
340 return clib_error_return (0,
341 "no available cpus to be used for"
342 " the '%s' thread #%u",
343 tr->name, n_env_cpu);
345 for (j = 0; j < tr->count; j++)
347 /* Do not use CPU 0 by default - leave it to the host and IRQs */
348 uword avail_c0 = clib_bitmap_get (affinity_cpu, 0);
349 affinity_cpu = clib_bitmap_set (affinity_cpu, 0, 0);
351 uword c = clib_bitmap_first_set (affinity_cpu);
352 /* Use CPU 0 as a last resort */
353 if (c == ~0 && avail_c0)
360 return clib_error_return (0,
361 "no available cpus to be used for"
362 " the '%s' thread #%u",
363 tr->name, tr->count);
365 affinity_cpu = clib_bitmap_set (affinity_cpu, 0, avail_c0);
366 affinity_cpu = clib_bitmap_set (affinity_cpu, c, 0);
367 tr->coremask = clib_bitmap_set (tr->coremask, c, 1);
372 clib_bitmap_free (avail_cpu);
373 clib_bitmap_free (affinity_cpu);
375 tm->n_vlib_mains = n_vlib_mains;
376 vlib_stats_set_gauge (stats_num_worker_threads_dir_index, n_vlib_mains - 1);
379 * Allocate the remaining worker threads, and thread stack vector slots
380 * from now on, calls to os_get_nthreads() will return the correct
383 vec_validate_aligned (vlib_worker_threads, first_index - 1,
384 CLIB_CACHE_LINE_BYTES);
385 vec_validate (vlib_thread_stacks, vec_len (vlib_worker_threads) - 1);
390 vlib_frame_queue_alloc (int nelts)
392 vlib_frame_queue_t *fq;
394 fq = clib_mem_alloc_aligned (sizeof (*fq), CLIB_CACHE_LINE_BYTES);
395 clib_memset (fq, 0, sizeof (*fq));
397 fq->vector_threshold = 2 * VLIB_FRAME_SIZE;
398 vec_validate_aligned (fq->elts, nelts - 1, CLIB_CACHE_LINE_BYTES);
400 if (nelts & (nelts - 1))
402 fformat (stderr, "FATAL: nelts MUST be a power of 2\n");
409 void vl_msg_api_handler_no_free (void *) __attribute__ ((weak));
411 vl_msg_api_handler_no_free (void *v)
415 /* To be called by vlib worker threads upon startup */
417 vlib_worker_thread_init (vlib_worker_thread_t * w)
419 vlib_thread_main_t *tm = vlib_get_thread_main ();
422 * Note: disabling signals in worker threads as follows
423 * prevents the api post-mortem dump scheme from working
427 * pthread_sigmask (SIG_SETMASK, &s, 0);
431 clib_mem_set_heap (w->thread_mheap);
433 if (vec_len (tm->thread_prefix) && w->registration->short_name)
435 w->name = format (0, "%v_%s_%d%c", tm->thread_prefix,
436 w->registration->short_name, w->instance_id, '\0');
437 vlib_set_thread_name ((char *) w->name);
440 if (!w->registration->use_pthreads)
443 /* Initial barrier sync, for both worker and i/o threads */
444 clib_atomic_fetch_add (vlib_worker_threads->workers_at_barrier, 1);
446 while (*vlib_worker_threads->wait_at_barrier)
449 clib_atomic_fetch_add (vlib_worker_threads->workers_at_barrier, -1);
454 vlib_worker_thread_bootstrap_fn (void *arg)
456 vlib_worker_thread_t *w = arg;
459 w->lwp = pthread_getthreadid_np ();
461 w->lwp = syscall (SYS_gettid);
462 #endif /* __FreeBSD__ */
463 w->thread_id = pthread_self ();
465 __os_thread_index = w - vlib_worker_threads;
469 void *frame_addr = __builtin_frame_address (0);
470 if (frame_addr < (void *) w->thread_stack ||
471 frame_addr > (void *) w->thread_stack + VLIB_THREAD_STACK_SIZE)
473 /* heap is not set yet */
474 fprintf (stderr, "thread stack is not set properly\n");
479 w->thread_function (arg);
485 vlib_get_thread_core_numa (vlib_worker_thread_t * w, unsigned cpu_id)
487 clib_bitmap_t *nbmp = 0, *cbmp = 0;
488 int node, core_id = -1, numa_id = -1;
490 core_id = os_get_cpu_phys_core_id (cpu_id);
491 nbmp = os_get_online_cpu_node_bitmap ();
493 clib_bitmap_foreach (node, nbmp) {
494 cbmp = os_get_cpu_on_node_bitmap (node);
495 if (clib_bitmap_get (cbmp, cpu_id))
497 vec_reset_length (cbmp);
503 w->core_id = core_id;
504 w->numa_id = numa_id;
507 static clib_error_t *
508 vlib_launch_thread_int (void *fp, vlib_worker_thread_t * w, unsigned cpu_id)
510 clib_mem_main_t *mm = &clib_mem_main;
511 vlib_thread_main_t *tm = &vlib_thread_main;
515 void *(*fp_arg) (void *) = fp;
519 vlib_get_thread_core_numa (w, cpu_id);
521 /* Set up NUMA-bound heap if indicated */
522 if (mm->per_numa_mheaps[w->numa_id] == 0)
524 /* If the user requested a NUMA heap, create it... */
525 if (tm->numa_heap_size)
527 clib_mem_set_numa_affinity (w->numa_id, 1 /* force */ );
528 numa_heap = clib_mem_create_heap (0 /* DIY */ , tm->numa_heap_size,
530 "numa %u heap", w->numa_id);
531 clib_mem_set_default_numa_affinity ();
532 mm->per_numa_mheaps[w->numa_id] = numa_heap;
536 /* Or, use the main heap */
537 mm->per_numa_mheaps[w->numa_id] = w->thread_mheap;
542 CPU_SET (cpu_id, &cpuset);
544 if (pthread_attr_init (&attr))
545 return clib_error_return_unix (0, "pthread_attr_init");
547 if (pthread_attr_setstack (&attr, w->thread_stack,
548 VLIB_THREAD_STACK_SIZE))
549 return clib_error_return_unix (0, "pthread_attr_setstack");
551 if (pthread_create (&worker, &attr, fp_arg, (void *) w))
552 return clib_error_return_unix (0, "pthread_create");
554 if (pthread_setaffinity_np (worker, sizeof (cpu_set_t), &cpuset))
555 return clib_error_return_unix (0, "pthread_setaffinity_np");
557 if (pthread_attr_destroy (&attr))
558 return clib_error_return_unix (0, "pthread_attr_destroy");
563 static clib_error_t *
564 start_workers (vlib_main_t * vm)
566 vlib_global_main_t *vgm = vlib_get_global_main ();
567 vlib_main_t *fvm = vlib_get_first_main ();
569 vlib_worker_thread_t *w;
570 vlib_main_t *vm_clone;
572 vlib_thread_main_t *tm = &vlib_thread_main;
573 vlib_thread_registration_t *tr;
574 vlib_node_runtime_t *rt;
575 u32 n_vlib_mains = tm->n_vlib_mains;
576 u32 worker_thread_index;
577 u32 stats_err_entry_index = fvm->error_main.stats_err_entry_index;
578 clib_mem_heap_t *main_heap = clib_mem_get_per_cpu_heap ();
579 vlib_stats_register_mem_heap (main_heap);
581 vec_reset_length (vlib_worker_threads);
583 /* Set up the main thread */
584 vec_add2_aligned (vlib_worker_threads, w, 1, CLIB_CACHE_LINE_BYTES);
585 w->elog_track.name = "main thread";
586 elog_track_register (vlib_get_elog_main (), &w->elog_track);
588 if (vec_len (tm->thread_prefix))
590 w->name = format (0, "%v_main%c", tm->thread_prefix, '\0');
591 vlib_set_thread_name ((char *) w->name);
594 vgm->elog_main.lock =
595 clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES, CLIB_CACHE_LINE_BYTES);
596 vgm->elog_main.lock[0] = 0;
598 clib_callback_data_init (&vm->vlib_node_runtime_perf_callbacks,
599 &vm->worker_thread_main_loop_callback_lock);
601 vec_validate_aligned (vgm->vlib_mains, n_vlib_mains - 1,
602 CLIB_CACHE_LINE_BYTES);
603 vec_set_len (vgm->vlib_mains, 0);
604 vec_add1_aligned (vgm->vlib_mains, vm, CLIB_CACHE_LINE_BYTES);
606 if (n_vlib_mains > 1)
608 vlib_worker_threads->wait_at_barrier =
609 clib_mem_alloc_aligned (sizeof (u32), CLIB_CACHE_LINE_BYTES);
610 vlib_worker_threads->workers_at_barrier =
611 clib_mem_alloc_aligned (sizeof (u32), CLIB_CACHE_LINE_BYTES);
613 vlib_worker_threads->node_reforks_required =
614 clib_mem_alloc_aligned (sizeof (u32), CLIB_CACHE_LINE_BYTES);
616 /* We'll need the rpc vector lock... */
617 clib_spinlock_init (&vm->pending_rpc_lock);
619 /* Ask for an initial barrier sync */
620 *vlib_worker_threads->workers_at_barrier = 0;
621 *vlib_worker_threads->wait_at_barrier = 1;
623 /* Without update or refork */
624 *vlib_worker_threads->node_reforks_required = 0;
625 vgm->need_vlib_worker_thread_node_runtime_update = 0;
628 vm->barrier_epoch = 0;
629 vm->barrier_no_close_before = 0;
631 worker_thread_index = 1;
632 clib_spinlock_init (&vm->worker_thread_main_loop_callback_lock);
634 for (i = 0; i < vec_len (tm->registrations); i++)
636 vlib_node_main_t *nm, *nm_clone;
639 tr = tm->registrations[i];
644 for (k = 0; k < tr->count; k++)
649 vec_add2 (vlib_worker_threads, w, 1);
650 /* Currently unused, may not really work */
652 w->thread_mheap = clib_mem_create_heap (0, tr->mheap_size,
657 w->thread_mheap = main_heap;
660 vlib_thread_stack_init (w - vlib_worker_threads);
661 w->thread_function = tr->function;
662 w->thread_function_arg = w;
664 w->registration = tr;
667 (char *) format (0, "%s %d", tr->name, k + 1);
668 vec_add1 (w->elog_track.name, 0);
669 elog_track_register (vlib_get_elog_main (), &w->elog_track);
671 if (tr->no_data_structure_clone)
674 /* Fork vlib_global_main et al. Look for bugs here */
675 oldheap = clib_mem_set_heap (w->thread_mheap);
677 vm_clone = clib_mem_alloc_aligned (sizeof (*vm_clone),
678 CLIB_CACHE_LINE_BYTES);
679 clib_memcpy (vm_clone, vlib_get_first_main (),
682 vm_clone->thread_index = worker_thread_index;
683 vm_clone->pending_rpc_requests = 0;
684 vec_validate (vm_clone->pending_rpc_requests, 0);
685 vec_set_len (vm_clone->pending_rpc_requests, 0);
686 clib_memset (&vm_clone->random_buffer, 0,
687 sizeof (vm_clone->random_buffer));
689 (&vm_clone->worker_thread_main_loop_callback_lock);
690 clib_callback_data_init
691 (&vm_clone->vlib_node_runtime_perf_callbacks,
692 &vm_clone->worker_thread_main_loop_callback_lock);
694 nm = &vlib_get_first_main ()->node_main;
695 nm_clone = &vm_clone->node_main;
696 /* fork next frames array, preserving node runtime indices */
697 nm_clone->next_frames = vec_dup_aligned (nm->next_frames,
698 CLIB_CACHE_LINE_BYTES);
699 for (j = 0; j < vec_len (nm_clone->next_frames); j++)
701 vlib_next_frame_t *nf = &nm_clone->next_frames[j];
702 u32 save_node_runtime_index;
705 save_node_runtime_index = nf->node_runtime_index;
706 save_flags = nf->flags & VLIB_FRAME_NO_FREE_AFTER_DISPATCH;
707 vlib_next_frame_init (nf);
708 nf->node_runtime_index = save_node_runtime_index;
709 nf->flags = save_flags;
712 /* fork the frame dispatch queue */
713 nm_clone->pending_frames = 0;
714 vec_validate (nm_clone->pending_frames, 10);
715 vec_set_len (nm_clone->pending_frames, 0);
720 /* Allocate all nodes in single block for speed */
721 n = clib_mem_alloc_no_fail (vec_len (nm->nodes) * sizeof (*n));
723 for (j = 0; j < vec_len (nm->nodes); j++)
725 clib_memcpy (n, nm->nodes[j], sizeof (*n));
726 /* none of the copied nodes have enqueue rights given out */
727 n->owner_node_index = VLIB_INVALID_NODE_INDEX;
728 clib_memset (&n->stats_total, 0, sizeof (n->stats_total));
729 clib_memset (&n->stats_last_clear, 0,
730 sizeof (n->stats_last_clear));
731 vec_add1 (nm_clone->nodes, n);
734 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL] =
735 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL],
736 CLIB_CACHE_LINE_BYTES);
738 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL])
740 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
741 /* copy initial runtime_data from node */
742 if (n->runtime_data && n->runtime_data_bytes > 0)
743 clib_memcpy (rt->runtime_data, n->runtime_data,
744 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
745 n->runtime_data_bytes));
748 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT] =
749 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_INPUT],
750 CLIB_CACHE_LINE_BYTES);
751 clib_interrupt_init (
752 &nm_clone->input_node_interrupts,
753 vec_len (nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT]));
754 clib_interrupt_init (
755 &nm_clone->pre_input_node_interrupts,
756 vec_len (nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT]));
757 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT])
759 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
760 /* copy initial runtime_data from node */
761 if (n->runtime_data && n->runtime_data_bytes > 0)
762 clib_memcpy (rt->runtime_data, n->runtime_data,
763 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
764 n->runtime_data_bytes));
767 nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT] =
768 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT],
769 CLIB_CACHE_LINE_BYTES);
771 nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT])
773 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
774 /* copy initial runtime_data from node */
775 if (n->runtime_data && n->runtime_data_bytes > 0)
776 clib_memcpy (rt->runtime_data, n->runtime_data,
777 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
778 n->runtime_data_bytes));
781 nm_clone->processes = vec_dup_aligned (nm->processes,
782 CLIB_CACHE_LINE_BYTES);
784 /* Create per-thread frame freelist */
785 nm_clone->frame_sizes = 0;
786 nm_clone->node_by_error = nm->node_by_error;
788 /* Packet trace buffers are guaranteed to be empty, nothing to do here */
790 clib_mem_set_heap (oldheap);
791 vec_add1_aligned (vgm->vlib_mains, vm_clone,
792 CLIB_CACHE_LINE_BYTES);
794 /* Switch to the stats segment ... */
795 vlib_stats_validate (stats_err_entry_index, worker_thread_index,
796 vec_len (fvm->error_main.counters) - 1);
797 c = vlib_stats_get_entry_data_pointer (stats_err_entry_index);
798 vm_clone->error_main.counters = c[worker_thread_index];
800 vm_clone->error_main.counters_last_clear = vec_dup_aligned (
801 vlib_get_first_main ()->error_main.counters_last_clear,
802 CLIB_CACHE_LINE_BYTES);
804 worker_thread_index++;
810 /* only have non-data-structure copy threads to create... */
811 for (i = 0; i < vec_len (tm->registrations); i++)
813 tr = tm->registrations[i];
815 for (j = 0; j < tr->count; j++)
817 vec_add2 (vlib_worker_threads, w, 1);
820 w->thread_mheap = clib_mem_create_heap (0, tr->mheap_size,
826 w->thread_mheap = main_heap;
828 vlib_thread_stack_init (w - vlib_worker_threads);
829 w->thread_function = tr->function;
830 w->thread_function_arg = w;
833 (char *) format (0, "%s %d", tr->name, j + 1);
834 w->registration = tr;
835 vec_add1 (w->elog_track.name, 0);
836 elog_track_register (vlib_get_elog_main (), &w->elog_track);
841 worker_thread_index = 1;
843 for (i = 0; i < vec_len (tm->registrations); i++)
848 tr = tm->registrations[i];
850 if (tr->use_pthreads || tm->use_pthreads)
852 for (j = 0; j < tr->count; j++)
855 w = vlib_worker_threads + worker_thread_index++;
856 err = vlib_launch_thread_int (vlib_worker_thread_bootstrap_fn,
859 clib_unix_error ("%U, thread %s init on cpu %d failed",
860 format_clib_error, err, tr->name, 0);
866 clib_bitmap_foreach (c, tr->coremask) {
867 w = vlib_worker_threads + worker_thread_index++;
868 err = vlib_launch_thread_int (vlib_worker_thread_bootstrap_fn,
871 clib_unix_error ("%U, thread %s init on cpu %d failed",
872 format_clib_error, err, tr->name, c);
876 vlib_worker_thread_barrier_sync (vm);
879 err = vlib_call_init_exit_functions (
880 vm, &vgm->num_workers_change_function_registrations, 1 /* call_once */,
883 clib_error_report (err);
885 vlib_worker_thread_barrier_release (vm);
889 VLIB_MAIN_LOOP_ENTER_FUNCTION (start_workers);
893 worker_thread_node_runtime_update_internal (void)
897 vlib_node_main_t *nm, *nm_clone;
898 vlib_main_t *vm_clone;
899 vlib_node_runtime_t *rt;
901 ASSERT (vlib_get_thread_index () == 0);
903 vm = vlib_get_first_main ();
906 ASSERT (*vlib_worker_threads->wait_at_barrier == 1);
909 * Scrape all runtime stats, so we don't lose node runtime(s) with
910 * pending counts, or throw away worker / io thread counts.
912 for (j = 0; j < vec_len (nm->nodes); j++)
916 vlib_node_sync_stats (vm, n);
919 for (i = 1; i < vlib_get_n_threads (); i++)
923 vm_clone = vlib_get_main_by_index (i);
924 nm_clone = &vm_clone->node_main;
926 for (j = 0; j < vec_len (nm_clone->nodes); j++)
928 n = nm_clone->nodes[j];
930 rt = vlib_node_get_runtime (vm_clone, n->index);
931 vlib_node_runtime_sync_stats (vm_clone, rt, 0, 0, 0);
935 /* Per-worker clone rebuilds are now done on each thread */
940 vlib_worker_thread_node_refork (void)
942 vlib_main_t *vm, *vm_clone;
943 vlib_node_main_t *nm, *nm_clone;
944 vlib_node_t **old_nodes_clone;
945 vlib_node_runtime_t *rt, *old_rt;
948 vlib_node_t *new_n_clone;
952 vm = vlib_get_first_main ();
954 vm_clone = vlib_get_main ();
955 nm_clone = &vm_clone->node_main;
957 /* Re-clone error heap */
958 u64 *old_counters_all_clear = vm_clone->error_main.counters_last_clear;
960 clib_memcpy_fast (&vm_clone->error_main, &vm->error_main,
961 sizeof (vm->error_main));
962 j = vec_len (vm->error_main.counters) - 1;
964 c = vlib_stats_get_entry_data_pointer (vm->error_main.stats_err_entry_index);
965 vm_clone->error_main.counters = c[vm_clone->thread_index];
967 vec_validate_aligned (old_counters_all_clear, j, CLIB_CACHE_LINE_BYTES);
968 vm_clone->error_main.counters_last_clear = old_counters_all_clear;
970 for (j = 0; j < vec_len (nm_clone->next_frames); j++)
972 vlib_next_frame_t *nf = &nm_clone->next_frames[j];
973 if ((nf->flags & VLIB_FRAME_IS_ALLOCATED) && nf->frame != NULL)
975 vlib_frame_t *f = nf->frame;
977 vlib_frame_free (vm_clone, f);
981 vec_free (nm_clone->next_frames);
982 nm_clone->next_frames = vec_dup_aligned (nm->next_frames,
983 CLIB_CACHE_LINE_BYTES);
985 for (j = 0; j < vec_len (nm_clone->next_frames); j++)
987 vlib_next_frame_t *nf = &nm_clone->next_frames[j];
988 u32 save_node_runtime_index;
991 save_node_runtime_index = nf->node_runtime_index;
992 save_flags = nf->flags & VLIB_FRAME_NO_FREE_AFTER_DISPATCH;
993 vlib_next_frame_init (nf);
994 nf->node_runtime_index = save_node_runtime_index;
995 nf->flags = save_flags;
998 old_nodes_clone = nm_clone->nodes;
1003 /* Allocate all nodes in single block for speed */
1005 clib_mem_alloc_no_fail (vec_len (nm->nodes) * sizeof (*new_n_clone));
1006 for (j = 0; j < vec_len (nm->nodes); j++)
1008 vlib_node_t *new_n = nm->nodes[j];
1010 clib_memcpy_fast (new_n_clone, new_n, sizeof (*new_n));
1011 /* none of the copied nodes have enqueue rights given out */
1012 new_n_clone->owner_node_index = VLIB_INVALID_NODE_INDEX;
1014 if (j >= vec_len (old_nodes_clone))
1016 /* new node, set to zero */
1017 clib_memset (&new_n_clone->stats_total, 0,
1018 sizeof (new_n_clone->stats_total));
1019 clib_memset (&new_n_clone->stats_last_clear, 0,
1020 sizeof (new_n_clone->stats_last_clear));
1024 vlib_node_t *old_n_clone = old_nodes_clone[j];
1025 /* Copy stats if the old data is valid */
1026 clib_memcpy_fast (&new_n_clone->stats_total,
1027 &old_n_clone->stats_total,
1028 sizeof (new_n_clone->stats_total));
1029 clib_memcpy_fast (&new_n_clone->stats_last_clear,
1030 &old_n_clone->stats_last_clear,
1031 sizeof (new_n_clone->stats_last_clear));
1033 /* keep previous node state */
1034 new_n_clone->state = old_n_clone->state;
1035 new_n_clone->flags = old_n_clone->flags;
1037 vec_add1 (nm_clone->nodes, new_n_clone);
1040 /* Free the old node clones */
1041 clib_mem_free (old_nodes_clone[0]);
1043 vec_free (old_nodes_clone);
1046 /* re-clone internal nodes */
1047 old_rt = nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL];
1048 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL] =
1049 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL],
1050 CLIB_CACHE_LINE_BYTES);
1052 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL])
1054 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
1055 /* copy runtime_data, will be overwritten later for existing rt */
1056 if (n->runtime_data && n->runtime_data_bytes > 0)
1057 clib_memcpy_fast (rt->runtime_data, n->runtime_data,
1058 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
1059 n->runtime_data_bytes));
1062 for (j = 0; j < vec_len (old_rt); j++)
1064 rt = vlib_node_get_runtime (vm_clone, old_rt[j].node_index);
1065 rt->state = old_rt[j].state;
1066 rt->flags = old_rt[j].flags;
1067 clib_memcpy_fast (rt->runtime_data, old_rt[j].runtime_data,
1068 VLIB_NODE_RUNTIME_DATA_SIZE);
1073 /* re-clone input nodes */
1074 old_rt = nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT];
1075 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT] =
1076 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_INPUT],
1077 CLIB_CACHE_LINE_BYTES);
1078 clib_interrupt_resize (
1079 &nm_clone->input_node_interrupts,
1080 vec_len (nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT]));
1081 clib_interrupt_resize (
1082 &nm_clone->pre_input_node_interrupts,
1083 vec_len (nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT]));
1085 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT])
1087 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
1088 /* copy runtime_data, will be overwritten later for existing rt */
1089 if (n->runtime_data && n->runtime_data_bytes > 0)
1090 clib_memcpy_fast (rt->runtime_data, n->runtime_data,
1091 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
1092 n->runtime_data_bytes));
1095 for (j = 0; j < vec_len (old_rt); j++)
1097 rt = vlib_node_get_runtime (vm_clone, old_rt[j].node_index);
1098 rt->state = old_rt[j].state;
1099 rt->flags = old_rt[j].flags;
1100 clib_memcpy_fast (rt->runtime_data, old_rt[j].runtime_data,
1101 VLIB_NODE_RUNTIME_DATA_SIZE);
1106 /* re-clone pre-input nodes */
1107 old_rt = nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT];
1108 nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT] =
1109 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT],
1110 CLIB_CACHE_LINE_BYTES);
1112 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT])
1114 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
1115 /* copy runtime_data, will be overwritten later for existing rt */
1116 if (n->runtime_data && n->runtime_data_bytes > 0)
1117 clib_memcpy_fast (rt->runtime_data, n->runtime_data,
1118 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
1119 n->runtime_data_bytes));
1122 for (j = 0; j < vec_len (old_rt); j++)
1124 rt = vlib_node_get_runtime (vm_clone, old_rt[j].node_index);
1125 rt->state = old_rt[j].state;
1126 rt->flags = old_rt[j].flags;
1127 clib_memcpy_fast (rt->runtime_data, old_rt[j].runtime_data,
1128 VLIB_NODE_RUNTIME_DATA_SIZE);
1133 vec_free (nm_clone->processes);
1134 nm_clone->processes = vec_dup_aligned (nm->processes,
1135 CLIB_CACHE_LINE_BYTES);
1136 nm_clone->node_by_error = nm->node_by_error;
1140 vlib_worker_thread_node_runtime_update (void)
1143 * Make a note that we need to do a node runtime update
1144 * prior to releasing the barrier.
1146 vlib_global_main.need_vlib_worker_thread_node_runtime_update = 1;
1150 unformat_sched_policy (unformat_input_t * input, va_list * args)
1152 u32 *r = va_arg (*args, u32 *);
1155 #define _(v,f,s) else if (unformat (input, s)) *r = SCHED_POLICY_##f;
1156 foreach_sched_policy
1163 static clib_error_t *
1164 cpu_config (vlib_main_t * vm, unformat_input_t * input)
1166 vlib_thread_registration_t *tr;
1168 vlib_thread_main_t *tm = &vlib_thread_main;
1173 tm->thread_registrations_by_name = hash_create_string (0, sizeof (uword));
1175 tm->n_thread_stacks = 1; /* account for main thread */
1176 tm->sched_policy = ~0;
1177 tm->sched_priority = ~0;
1178 tm->main_lcore = ~0;
1179 tm->use_main_core_auto = 0;
1185 hash_set_mem (tm->thread_registrations_by_name, tr->name, (uword) tr);
1189 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1191 if (unformat (input, "use-pthreads"))
1192 tm->use_pthreads = 1;
1193 else if (unformat (input, "thread-prefix %v", &tm->thread_prefix))
1195 else if (unformat (input, "main-core auto"))
1196 tm->use_main_core_auto = 1;
1197 else if (unformat (input, "main-core %u", &tm->main_lcore))
1199 else if (unformat (input, "skip-cores %u", &tm->skip_cores))
1201 else if (unformat (input, "numa-heap-size %U",
1202 unformat_memory_size, &tm->numa_heap_size))
1204 else if (unformat (input, "coremask-%s %U", &name,
1205 unformat_bitmap_mask, &bitmap) ||
1206 unformat (input, "corelist-%s %U", &name,
1207 unformat_bitmap_list, &bitmap))
1209 p = hash_get_mem (tm->thread_registrations_by_name, name);
1211 return clib_error_return (0, "no such thread type '%s'", name);
1213 tr = (vlib_thread_registration_t *) p[0];
1215 if (tr->use_pthreads)
1216 return clib_error_return (0,
1217 "corelist cannot be set for '%s' threads",
1220 return clib_error_return
1221 (0, "core placement of '%s' threads is already configured",
1224 tr->coremask = bitmap;
1225 tr->count = clib_bitmap_count_set_bits (tr->coremask);
1229 (input, "scheduler-policy %U", unformat_sched_policy,
1232 else if (unformat (input, "scheduler-priority %u", &tm->sched_priority))
1234 else if (unformat (input, "%s %u", &name, &count))
1236 p = hash_get_mem (tm->thread_registrations_by_name, name);
1238 return clib_error_return (0, "no such thread type 3 '%s'", name);
1240 tr = (vlib_thread_registration_t *) p[0];
1242 if (tr->fixed_count)
1243 return clib_error_return
1244 (0, "number of '%s' threads not configurable", name);
1246 return clib_error_return
1247 (0, "number of '%s' threads is already configured", name);
1255 if (tm->main_lcore != ~0 && tm->use_main_core_auto)
1257 return clib_error_return (
1258 0, "cannot set both 'main-core %u' and 'main-core auto'",
1262 if (tm->sched_priority != ~0)
1264 if (tm->sched_policy == SCHED_FIFO || tm->sched_policy == SCHED_RR)
1266 u32 prio_max = sched_get_priority_max (tm->sched_policy);
1267 u32 prio_min = sched_get_priority_min (tm->sched_policy);
1268 if (tm->sched_priority > prio_max)
1269 tm->sched_priority = prio_max;
1270 if (tm->sched_priority < prio_min)
1271 tm->sched_priority = prio_min;
1275 return clib_error_return
1277 "scheduling priority (%d) is not allowed for `normal` scheduling policy",
1278 tm->sched_priority);
1283 if (!tm->thread_prefix)
1284 tm->thread_prefix = format (0, "vpp");
1288 tm->n_thread_stacks += tr->count;
1289 tm->n_pthreads += tr->count * tr->use_pthreads;
1290 tm->n_threads += tr->count * (tr->use_pthreads == 0);
1297 VLIB_EARLY_CONFIG_FUNCTION (cpu_config, "cpu");
1300 * Enforce minimum open time to minimize packet loss due to Rx overflow,
1301 * based on a test based heuristic that barrier should be open for at least
1302 * 3 time as long as it is closed (with an upper bound of 1ms because by that
1303 * point it is probably too late to make a difference)
1306 #ifndef BARRIER_MINIMUM_OPEN_LIMIT
1307 #define BARRIER_MINIMUM_OPEN_LIMIT 0.001
1310 #ifndef BARRIER_MINIMUM_OPEN_FACTOR
1311 #define BARRIER_MINIMUM_OPEN_FACTOR 3
1315 vlib_worker_thread_initial_barrier_sync_and_release (vlib_main_t * vm)
1318 f64 now = vlib_time_now (vm);
1319 u32 count = vlib_get_n_threads () - 1;
1321 /* No worker threads? */
1325 deadline = now + BARRIER_SYNC_TIMEOUT;
1326 *vlib_worker_threads->wait_at_barrier = 1;
1327 while (*vlib_worker_threads->workers_at_barrier != count)
1329 if ((now = vlib_time_now (vm)) > deadline)
1331 fformat (stderr, "%s: worker thread deadlock\n", __FUNCTION__);
1336 *vlib_worker_threads->wait_at_barrier = 0;
1340 * Return true if the wroker thread barrier is held
1343 vlib_worker_thread_barrier_held (void)
1345 if (vlib_get_n_threads () < 2)
1348 return (*vlib_worker_threads->wait_at_barrier == 1);
1352 vlib_worker_thread_barrier_sync_int (vlib_main_t * vm, const char *func_name)
1359 f64 max_vector_rate;
1363 if (vlib_get_n_threads () < 2)
1366 ASSERT (vlib_get_thread_index () == 0);
1368 vlib_worker_threads[0].barrier_caller = func_name;
1369 count = vlib_get_n_threads () - 1;
1371 /* Record entry relative to last close */
1372 now = vlib_time_now (vm);
1373 t_entry = now - vm->barrier_epoch;
1375 /* Tolerate recursive calls */
1376 if (++vlib_worker_threads[0].recursion_level > 1)
1378 barrier_trace_sync_rec (t_entry);
1382 if (PREDICT_FALSE (vec_len (vm->barrier_perf_callbacks) != 0))
1383 clib_call_callbacks (vm->barrier_perf_callbacks, vm,
1384 vm->clib_time.last_cpu_time, 0 /* enter */ );
1387 * Need data to decide if we're working hard enough to honor
1388 * the barrier hold-down timer.
1390 max_vector_rate = 0.0;
1391 for (i = 1; i < vlib_get_n_threads (); i++)
1393 vlib_main_t *ovm = vlib_get_main_by_index (i);
1394 max_vector_rate = clib_max (max_vector_rate,
1395 (f64) vlib_last_vectors_per_main_loop (ovm));
1398 vlib_worker_threads[0].barrier_sync_count++;
1400 /* Enforce minimum barrier open time to minimize packet loss */
1401 ASSERT (vm->barrier_no_close_before <= (now + BARRIER_MINIMUM_OPEN_LIMIT));
1404 * If any worker thread seems busy, which we define
1405 * as a vector rate above 10, we enforce the barrier hold-down timer
1407 if (max_vector_rate > 10.0)
1411 now = vlib_time_now (vm);
1412 /* Barrier hold-down timer expired? */
1413 if (now >= vm->barrier_no_close_before)
1415 if ((vm->barrier_no_close_before - now)
1416 > (2.0 * BARRIER_MINIMUM_OPEN_LIMIT))
1419 ("clock change: would have waited for %.4f seconds",
1420 (vm->barrier_no_close_before - now));
1425 /* Record time of closure */
1426 t_open = now - vm->barrier_epoch;
1427 vm->barrier_epoch = now;
1429 deadline = now + BARRIER_SYNC_TIMEOUT;
1431 *vlib_worker_threads->wait_at_barrier = 1;
1432 while (*vlib_worker_threads->workers_at_barrier != count)
1434 if ((now = vlib_time_now (vm)) > deadline)
1436 fformat (stderr, "%s: worker thread deadlock\n", __FUNCTION__);
1441 t_closed = now - vm->barrier_epoch;
1443 barrier_trace_sync (t_entry, t_open, t_closed);
1448 vlib_worker_thread_barrier_release (vlib_main_t * vm)
1450 vlib_global_main_t *vgm = vlib_get_global_main ();
1456 f64 t_update_main = 0.0;
1457 int refork_needed = 0;
1459 if (vlib_get_n_threads () < 2)
1462 ASSERT (vlib_get_thread_index () == 0);
1465 now = vlib_time_now (vm);
1466 t_entry = now - vm->barrier_epoch;
1468 if (--vlib_worker_threads[0].recursion_level > 0)
1470 barrier_trace_release_rec (t_entry);
1474 /* Update (all) node runtimes before releasing the barrier, if needed */
1475 if (vgm->need_vlib_worker_thread_node_runtime_update)
1478 * Lock stat segment here, so we's safe when
1479 * rebuilding the stat segment node clones from the
1482 vlib_stats_segment_lock ();
1484 /* Do stats elements on main thread */
1485 worker_thread_node_runtime_update_internal ();
1486 vgm->need_vlib_worker_thread_node_runtime_update = 0;
1488 /* Do per thread rebuilds in parallel */
1490 clib_atomic_fetch_add (vlib_worker_threads->node_reforks_required,
1491 (vlib_get_n_threads () - 1));
1492 now = vlib_time_now (vm);
1493 t_update_main = now - vm->barrier_epoch;
1496 deadline = now + BARRIER_SYNC_TIMEOUT;
1499 * Note when we let go of the barrier.
1500 * Workers can use this to derive a reasonably accurate
1501 * time offset. See vlib_time_now(...)
1503 vm->time_last_barrier_release = vlib_time_now (vm);
1504 CLIB_MEMORY_STORE_BARRIER ();
1506 *vlib_worker_threads->wait_at_barrier = 0;
1508 while (*vlib_worker_threads->workers_at_barrier > 0)
1510 if ((now = vlib_time_now (vm)) > deadline)
1512 fformat (stderr, "%s: worker thread deadlock\n", __FUNCTION__);
1517 /* Wait for reforks before continuing */
1520 now = vlib_time_now (vm);
1522 deadline = now + BARRIER_SYNC_TIMEOUT;
1524 while (*vlib_worker_threads->node_reforks_required > 0)
1526 if ((now = vlib_time_now (vm)) > deadline)
1528 fformat (stderr, "%s: worker thread refork deadlock\n",
1533 vlib_stats_segment_unlock ();
1536 t_closed_total = now - vm->barrier_epoch;
1538 minimum_open = t_closed_total * BARRIER_MINIMUM_OPEN_FACTOR;
1540 if (minimum_open > BARRIER_MINIMUM_OPEN_LIMIT)
1542 minimum_open = BARRIER_MINIMUM_OPEN_LIMIT;
1545 vm->barrier_no_close_before = now + minimum_open;
1547 /* Record barrier epoch (used to enforce minimum open time) */
1548 vm->barrier_epoch = now;
1550 barrier_trace_release (t_entry, t_closed_total, t_update_main);
1552 if (PREDICT_FALSE (vec_len (vm->barrier_perf_callbacks) != 0))
1553 clib_call_callbacks (vm->barrier_perf_callbacks, vm,
1554 vm->clib_time.last_cpu_time, 1 /* leave */ );
1558 vlib_worker_sync_rpc (void *args)
1560 ASSERT (vlib_thread_is_main_w_barrier ());
1561 vlib_worker_threads->wait_before_barrier = 0;
1565 vlib_workers_sync (void)
1567 if (PREDICT_FALSE (!vlib_num_workers ()))
1570 if (!(*vlib_worker_threads->wait_at_barrier) &&
1571 !clib_atomic_swap_rel_n (&vlib_worker_threads->wait_before_barrier, 1))
1573 u32 thread_index = vlib_get_thread_index ();
1574 vlib_rpc_call_main_thread (vlib_worker_sync_rpc, (u8 *) &thread_index,
1575 sizeof (thread_index));
1576 vlib_worker_flush_pending_rpc_requests (vlib_get_main ());
1579 /* Wait until main thread asks for barrier */
1580 while (!(*vlib_worker_threads->wait_at_barrier))
1583 /* Stop before barrier and make sure all threads are either
1584 * at worker barrier or the barrier before it */
1585 clib_atomic_fetch_add (&vlib_worker_threads->workers_before_barrier, 1);
1586 while (vlib_num_workers () > (*vlib_worker_threads->workers_at_barrier +
1587 vlib_worker_threads->workers_before_barrier))
1592 vlib_workers_continue (void)
1594 if (PREDICT_FALSE (!vlib_num_workers ()))
1597 clib_atomic_fetch_add (&vlib_worker_threads->done_work_before_barrier, 1);
1599 /* Wait until all workers are done with work before barrier */
1600 while (vlib_worker_threads->done_work_before_barrier <
1601 vlib_worker_threads->workers_before_barrier)
1604 clib_atomic_fetch_add (&vlib_worker_threads->done_work_before_barrier, -1);
1605 clib_atomic_fetch_add (&vlib_worker_threads->workers_before_barrier, -1);
1609 * Wait until each of the workers has been once around the track
1612 vlib_worker_wait_one_loop (void)
1614 vlib_global_main_t *vgm = vlib_get_global_main ();
1615 ASSERT (vlib_get_thread_index () == 0);
1617 if (vlib_get_n_threads () < 2)
1620 if (vlib_worker_thread_barrier_held ())
1626 vec_validate (counts, vlib_get_n_threads () - 1);
1628 /* record the current loop counts */
1629 vec_foreach_index (ii, vgm->vlib_mains)
1630 counts[ii] = vgm->vlib_mains[ii]->main_loop_count;
1632 /* spin until each changes, apart from the main thread, or we'd be
1634 for (ii = 1; ii < vec_len (counts); ii++)
1636 while (counts[ii] == vgm->vlib_mains[ii]->main_loop_count)
1645 vlib_worker_flush_pending_rpc_requests (vlib_main_t *vm)
1647 vlib_main_t *vm_global = vlib_get_first_main ();
1649 ASSERT (vm != vm_global);
1651 clib_spinlock_lock_if_init (&vm_global->pending_rpc_lock);
1652 vec_append (vm_global->pending_rpc_requests, vm->pending_rpc_requests);
1653 vec_reset_length (vm->pending_rpc_requests);
1654 clib_spinlock_unlock_if_init (&vm_global->pending_rpc_lock);
1658 vlib_worker_thread_fn (void *arg)
1660 vlib_global_main_t *vgm = vlib_get_global_main ();
1661 vlib_worker_thread_t *w = (vlib_worker_thread_t *) arg;
1662 vlib_main_t *vm = vlib_get_main ();
1665 ASSERT (vm->thread_index == vlib_get_thread_index ());
1667 vlib_worker_thread_init (w);
1668 clib_time_init (&vm->clib_time);
1669 clib_mem_set_heap (w->thread_mheap);
1671 vm->worker_init_functions_called = hash_create (0, 0);
1673 e = vlib_call_init_exit_functions_no_sort (
1674 vm, &vgm->worker_init_function_registrations, 1 /* call_once */,
1677 clib_error_report (e);
1679 vlib_worker_loop (vm);
1682 VLIB_REGISTER_THREAD (worker_thread_reg, static) = {
1685 .function = vlib_worker_thread_fn,
1688 extern clib_march_fn_registration
1689 *vlib_frame_queue_dequeue_with_aux_fn_march_fn_registrations;
1690 extern clib_march_fn_registration
1691 *vlib_frame_queue_dequeue_fn_march_fn_registrations;
1693 vlib_frame_queue_main_init (u32 node_index, u32 frame_queue_nelts)
1695 vlib_thread_main_t *tm = vlib_get_thread_main ();
1696 vlib_main_t *vm = vlib_get_main ();
1697 vlib_frame_queue_main_t *fqm;
1698 vlib_frame_queue_t *fq;
1703 if (frame_queue_nelts == 0)
1704 frame_queue_nelts = FRAME_QUEUE_MAX_NELTS;
1706 num_threads = 1 /* main thread */ + tm->n_threads;
1707 ASSERT (frame_queue_nelts >= 8 + num_threads);
1709 vec_add2 (tm->frame_queue_mains, fqm, 1);
1711 node = vlib_get_node (vm, fqm->node_index);
1713 if (node->aux_offset)
1715 fqm->frame_queue_dequeue_fn =
1716 CLIB_MARCH_FN_VOID_POINTER (vlib_frame_queue_dequeue_with_aux_fn);
1720 fqm->frame_queue_dequeue_fn =
1721 CLIB_MARCH_FN_VOID_POINTER (vlib_frame_queue_dequeue_fn);
1724 fqm->node_index = node_index;
1725 fqm->frame_queue_nelts = frame_queue_nelts;
1727 vec_validate (fqm->vlib_frame_queues, tm->n_vlib_mains - 1);
1728 vec_set_len (fqm->vlib_frame_queues, 0);
1729 for (i = 0; i < tm->n_vlib_mains; i++)
1731 fq = vlib_frame_queue_alloc (frame_queue_nelts);
1732 vec_add1 (fqm->vlib_frame_queues, fq);
1735 return (fqm - tm->frame_queue_mains);
1739 vlib_process_signal_event_mt_helper (vlib_process_signal_event_mt_args_t *
1742 ASSERT (vlib_get_thread_index () == 0);
1743 vlib_process_signal_event (vlib_get_main (), args->node_index,
1744 args->type_opaque, args->data);
1747 void *rpc_call_main_thread_cb_fn;
1750 vlib_rpc_call_main_thread (void *callback, u8 * args, u32 arg_size)
1752 if (rpc_call_main_thread_cb_fn)
1754 void (*fp) (void *, u8 *, u32) = rpc_call_main_thread_cb_fn;
1755 (*fp) (callback, args, arg_size);
1758 clib_warning ("BUG: rpc_call_main_thread_cb_fn NULL!");
1762 threads_init (vlib_main_t * vm)
1764 const vlib_thread_main_t *tm = vlib_get_thread_main ();
1766 if (tm->main_lcore == ~0 && tm->n_vlib_mains > 1)
1767 return clib_error_return (0, "Configuration error, a main core must "
1768 "be specified when using worker threads");
1773 VLIB_INIT_FUNCTION (threads_init);
1775 static clib_error_t *
1776 show_clock_command_fn (vlib_main_t * vm,
1777 unformat_input_t * input, vlib_cli_command_t * cmd)
1780 clib_timebase_t _tb, *tb = &_tb;
1782 (void) unformat (input, "verbose %=", &verbose, 1);
1784 clib_timebase_init (tb, 0 /* GMT */ , CLIB_TIMEBASE_DAYLIGHT_NONE,
1787 vlib_cli_output (vm, "%U, %U GMT", format_clib_time, &vm->clib_time,
1788 verbose, format_clib_timebase_time,
1789 clib_timebase_now (tb));
1791 vlib_cli_output (vm, "Time last barrier release %.9f",
1792 vm->time_last_barrier_release);
1794 foreach_vlib_main ()
1796 vlib_cli_output (vm, "%d: %U", this_vlib_main->thread_index,
1797 format_clib_time, &this_vlib_main->clib_time, verbose);
1799 vlib_cli_output (vm, "Thread %d offset %.9f error %.9f",
1800 this_vlib_main->thread_index,
1801 this_vlib_main->time_offset,
1802 vm->time_last_barrier_release -
1803 this_vlib_main->time_last_barrier_release);
1808 VLIB_CLI_COMMAND (f_command, static) =
1810 .path = "show clock",
1811 .short_help = "show clock",
1812 .function = show_clock_command_fn,
1815 vlib_thread_main_t *
1816 vlib_get_thread_main_not_inline (void)
1818 return vlib_get_thread_main ();
1822 * fd.io coding-style-patch-verification: ON
1825 * eval: (c-set-style "gnu")