2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
19 #include <vppinfra/format.h>
20 #include <vppinfra/time_range.h>
21 #include <vppinfra/interrupt.h>
22 #include <vppinfra/linux/sysfs.h>
23 #include <vlib/vlib.h>
25 #include <vlib/threads.h>
27 #include <vlib/stats/stats.h>
35 vlib_worker_thread_t *vlib_worker_threads;
36 vlib_thread_main_t vlib_thread_main;
39 * Barrier tracing can be enabled on a normal build to collect information
40 * on barrier use, including timings and call stacks. Deliberately not
41 * keyed off CLIB_DEBUG, because that can add significant overhead which
42 * imapacts observed timings.
46 barrier_trace_sync (f64 t_entry, f64 t_open, f64 t_closed)
48 if (!vlib_worker_threads->barrier_elog_enabled)
51 ELOG_TYPE_DECLARE (e) = {
52 .format = "bar-trace-%s-#%d",
53 .format_args = "T4i4",
58 u32 caller, count, t_entry, t_open, t_closed;
61 ed = ELOG_DATA (&vlib_global_main.elog_main, e);
62 ed->count = (int) vlib_worker_threads[0].barrier_sync_count;
63 ed->caller = elog_string (&vlib_global_main.elog_main,
64 (char *) vlib_worker_threads[0].barrier_caller);
65 ed->t_entry = (int) (1000000.0 * t_entry);
66 ed->t_open = (int) (1000000.0 * t_open);
67 ed->t_closed = (int) (1000000.0 * t_closed);
71 barrier_trace_sync_rec (f64 t_entry)
73 if (!vlib_worker_threads->barrier_elog_enabled)
76 ELOG_TYPE_DECLARE (e) = {
77 .format = "bar-syncrec-%s-#%d",
78 .format_args = "T4i4",
86 ed = ELOG_DATA (&vlib_global_main.elog_main, e);
87 ed->depth = (int) vlib_worker_threads[0].recursion_level - 1;
88 ed->caller = elog_string (&vlib_global_main.elog_main,
89 (char *) vlib_worker_threads[0].barrier_caller);
93 barrier_trace_release_rec (f64 t_entry)
95 if (!vlib_worker_threads->barrier_elog_enabled)
98 ELOG_TYPE_DECLARE (e) = {
99 .format = "bar-relrrec-#%d",
108 ed = ELOG_DATA (&vlib_global_main.elog_main, e);
109 ed->depth = (int) vlib_worker_threads[0].recursion_level;
113 barrier_trace_release (f64 t_entry, f64 t_closed_total, f64 t_update_main)
115 if (!vlib_worker_threads->barrier_elog_enabled)
118 ELOG_TYPE_DECLARE (e) = {
119 .format = "bar-rel-#%d-e%d-u%d-t%d",
120 .format_args = "i4i4i4i4",
125 u32 count, t_entry, t_update_main, t_closed_total;
128 ed = ELOG_DATA (&vlib_global_main.elog_main, e);
129 ed->t_entry = (int) (1000000.0 * t_entry);
130 ed->t_update_main = (int) (1000000.0 * t_update_main);
131 ed->t_closed_total = (int) (1000000.0 * t_closed_total);
132 ed->count = (int) vlib_worker_threads[0].barrier_sync_count;
134 /* Reset context for next trace */
135 vlib_worker_threads[0].barrier_context = NULL;
139 os_get_nthreads (void)
141 return vec_len (vlib_thread_stacks);
145 vlib_set_thread_name (char *name)
147 int pthread_setname_np (pthread_t __target_thread, const char *__name);
149 pthread_t thread = pthread_self ();
153 rv = pthread_setname_np (thread, name);
155 clib_warning ("pthread_setname_np returned %d", rv);
160 sort_registrations_by_no_clone (void *a0, void *a1)
162 vlib_thread_registration_t **tr0 = a0;
163 vlib_thread_registration_t **tr1 = a1;
165 return ((i32) ((*tr0)->no_data_structure_clone)
166 - ((i32) ((*tr1)->no_data_structure_clone)));
170 /* Called early in the init sequence */
173 vlib_thread_init (vlib_main_t * vm)
175 vlib_thread_main_t *tm = &vlib_thread_main;
176 vlib_worker_thread_t *w;
177 vlib_thread_registration_t *tr;
178 u32 n_vlib_mains = 1;
182 u32 stats_num_worker_threads_dir_index;
184 stats_num_worker_threads_dir_index =
185 vlib_stats_add_gauge ("/sys/num_worker_threads");
186 ASSERT (stats_num_worker_threads_dir_index != ~0);
188 /* get bitmaps of active cpu cores and sockets */
189 tm->cpu_core_bitmap =
190 clib_sysfs_list_to_bitmap ("/sys/devices/system/cpu/online");
191 tm->cpu_socket_bitmap =
192 clib_sysfs_list_to_bitmap ("/sys/devices/system/node/online");
194 avail_cpu = clib_bitmap_dup (tm->cpu_core_bitmap);
197 for (i = 0; i < tm->skip_cores; i++)
199 uword c = clib_bitmap_first_set (avail_cpu);
201 return clib_error_return (0, "no available cpus to skip");
203 avail_cpu = clib_bitmap_set (avail_cpu, c, 0);
206 /* grab cpu for main thread */
207 if (tm->main_lcore != ~0)
209 if (clib_bitmap_get (avail_cpu, tm->main_lcore) == 0)
210 return clib_error_return (0, "cpu %u is not available to be used"
211 " for the main thread", tm->main_lcore);
212 avail_cpu = clib_bitmap_set (avail_cpu, tm->main_lcore, 0);
215 /* assume that there is socket 0 only if there is no data from sysfs */
216 if (!tm->cpu_socket_bitmap)
217 tm->cpu_socket_bitmap = clib_bitmap_set (0, 0, 1);
219 /* pin main thread to main_lcore */
220 if (tm->main_lcore != ~0)
224 CPU_SET (tm->main_lcore, &cpuset);
225 pthread_setaffinity_np (pthread_self (), sizeof (cpu_set_t), &cpuset);
228 /* Set up thread 0 */
229 vec_validate_aligned (vlib_worker_threads, 0, CLIB_CACHE_LINE_BYTES);
230 vec_set_len (vlib_worker_threads, 1);
231 w = vlib_worker_threads;
232 w->thread_mheap = clib_mem_get_heap ();
233 w->thread_stack = vlib_thread_stacks[0];
234 w->cpu_id = tm->main_lcore;
235 w->lwp = syscall (SYS_gettid);
236 w->thread_id = pthread_self ();
237 tm->n_vlib_mains = 1;
239 vlib_get_thread_core_numa (w, w->cpu_id);
241 if (tm->sched_policy != ~0)
243 struct sched_param sched_param;
244 if (!sched_getparam (w->lwp, &sched_param))
246 if (tm->sched_priority != ~0)
247 sched_param.sched_priority = tm->sched_priority;
248 sched_setscheduler (w->lwp, tm->sched_policy, &sched_param);
252 /* assign threads to cores and set n_vlib_mains */
257 vec_add1 (tm->registrations, tr);
261 vec_sort_with_function (tm->registrations, sort_registrations_by_no_clone);
263 for (i = 0; i < vec_len (tm->registrations); i++)
266 tr = tm->registrations[i];
267 tr->first_index = first_index;
268 first_index += tr->count;
269 n_vlib_mains += (tr->no_data_structure_clone == 0) ? tr->count : 0;
271 /* construct coremask */
272 if (tr->use_pthreads || !tr->count)
279 clib_bitmap_foreach (c, tr->coremask) {
280 if (clib_bitmap_get(avail_cpu, c) == 0)
281 return clib_error_return (0, "cpu %u is not available to be used"
282 " for the '%s' thread",c, tr->name);
284 avail_cpu = clib_bitmap_set(avail_cpu, c, 0);
290 for (j = 0; j < tr->count; j++)
292 /* Do not use CPU 0 by default - leave it to the host and IRQs */
293 uword avail_c0 = clib_bitmap_get (avail_cpu, 0);
294 avail_cpu = clib_bitmap_set (avail_cpu, 0, 0);
296 uword c = clib_bitmap_first_set (avail_cpu);
297 /* Use CPU 0 as a last resort */
298 if (c == ~0 && avail_c0)
305 return clib_error_return (0,
306 "no available cpus to be used for"
307 " the '%s' thread", tr->name);
309 avail_cpu = clib_bitmap_set (avail_cpu, 0, avail_c0);
310 avail_cpu = clib_bitmap_set (avail_cpu, c, 0);
311 tr->coremask = clib_bitmap_set (tr->coremask, c, 1);
316 clib_bitmap_free (avail_cpu);
318 tm->n_vlib_mains = n_vlib_mains;
319 vlib_stats_set_gauge (stats_num_worker_threads_dir_index, n_vlib_mains - 1);
322 * Allocate the remaining worker threads, and thread stack vector slots
323 * from now on, calls to os_get_nthreads() will return the correct
326 vec_validate_aligned (vlib_worker_threads, first_index - 1,
327 CLIB_CACHE_LINE_BYTES);
328 vec_validate (vlib_thread_stacks, vec_len (vlib_worker_threads) - 1);
333 vlib_frame_queue_alloc (int nelts)
335 vlib_frame_queue_t *fq;
337 fq = clib_mem_alloc_aligned (sizeof (*fq), CLIB_CACHE_LINE_BYTES);
338 clib_memset (fq, 0, sizeof (*fq));
340 fq->vector_threshold = 2 * VLIB_FRAME_SIZE;
341 vec_validate_aligned (fq->elts, nelts - 1, CLIB_CACHE_LINE_BYTES);
343 if (nelts & (nelts - 1))
345 fformat (stderr, "FATAL: nelts MUST be a power of 2\n");
352 void vl_msg_api_handler_no_free (void *) __attribute__ ((weak));
354 vl_msg_api_handler_no_free (void *v)
358 /* To be called by vlib worker threads upon startup */
360 vlib_worker_thread_init (vlib_worker_thread_t * w)
362 vlib_thread_main_t *tm = vlib_get_thread_main ();
365 * Note: disabling signals in worker threads as follows
366 * prevents the api post-mortem dump scheme from working
370 * pthread_sigmask (SIG_SETMASK, &s, 0);
374 clib_mem_set_heap (w->thread_mheap);
376 if (vec_len (tm->thread_prefix) && w->registration->short_name)
378 w->name = format (0, "%v_%s_%d%c", tm->thread_prefix,
379 w->registration->short_name, w->instance_id, '\0');
380 vlib_set_thread_name ((char *) w->name);
383 if (!w->registration->use_pthreads)
386 /* Initial barrier sync, for both worker and i/o threads */
387 clib_atomic_fetch_add (vlib_worker_threads->workers_at_barrier, 1);
389 while (*vlib_worker_threads->wait_at_barrier)
392 clib_atomic_fetch_add (vlib_worker_threads->workers_at_barrier, -1);
397 vlib_worker_thread_bootstrap_fn (void *arg)
399 vlib_worker_thread_t *w = arg;
401 w->lwp = syscall (SYS_gettid);
402 w->thread_id = pthread_self ();
404 __os_thread_index = w - vlib_worker_threads;
408 void *frame_addr = __builtin_frame_address (0);
409 if (frame_addr < (void *) w->thread_stack ||
410 frame_addr > (void *) w->thread_stack + VLIB_THREAD_STACK_SIZE)
412 /* heap is not set yet */
413 fprintf (stderr, "thread stack is not set properly\n");
418 w->thread_function (arg);
424 vlib_get_thread_core_numa (vlib_worker_thread_t * w, unsigned cpu_id)
426 const char *sys_cpu_path = "/sys/devices/system/cpu/cpu";
427 const char *sys_node_path = "/sys/devices/system/node/node";
428 clib_bitmap_t *nbmp = 0, *cbmp = 0;
431 int core_id = -1, numa_id = -1;
433 p = format (p, "%s%u/topology/core_id%c", sys_cpu_path, cpu_id, 0);
434 clib_sysfs_read ((char *) p, "%d", &core_id);
435 vec_reset_length (p);
438 clib_sysfs_read ("/sys/devices/system/node/online", "%U",
439 unformat_bitmap_list, &nbmp);
440 clib_bitmap_foreach (node, nbmp) {
441 p = format (p, "%s%u/cpulist%c", sys_node_path, node, 0);
442 clib_sysfs_read ((char *) p, "%U", unformat_bitmap_list, &cbmp);
443 if (clib_bitmap_get (cbmp, cpu_id))
445 vec_reset_length (cbmp);
446 vec_reset_length (p);
453 w->core_id = core_id;
454 w->numa_id = numa_id;
457 static clib_error_t *
458 vlib_launch_thread_int (void *fp, vlib_worker_thread_t * w, unsigned cpu_id)
460 clib_mem_main_t *mm = &clib_mem_main;
461 vlib_thread_main_t *tm = &vlib_thread_main;
465 void *(*fp_arg) (void *) = fp;
469 vlib_get_thread_core_numa (w, cpu_id);
471 /* Set up NUMA-bound heap if indicated */
472 if (mm->per_numa_mheaps[w->numa_id] == 0)
474 /* If the user requested a NUMA heap, create it... */
475 if (tm->numa_heap_size)
477 clib_mem_set_numa_affinity (w->numa_id, 1 /* force */ );
478 numa_heap = clib_mem_create_heap (0 /* DIY */ , tm->numa_heap_size,
480 "numa %u heap", w->numa_id);
481 clib_mem_set_default_numa_affinity ();
482 mm->per_numa_mheaps[w->numa_id] = numa_heap;
486 /* Or, use the main heap */
487 mm->per_numa_mheaps[w->numa_id] = w->thread_mheap;
492 CPU_SET (cpu_id, &cpuset);
494 if (pthread_attr_init (&attr))
495 return clib_error_return_unix (0, "pthread_attr_init");
497 if (pthread_attr_setstack (&attr, w->thread_stack,
498 VLIB_THREAD_STACK_SIZE))
499 return clib_error_return_unix (0, "pthread_attr_setstack");
501 if (pthread_create (&worker, &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");
507 if (pthread_attr_destroy (&attr))
508 return clib_error_return_unix (0, "pthread_attr_destroy");
513 static clib_error_t *
514 start_workers (vlib_main_t * vm)
516 vlib_global_main_t *vgm = vlib_get_global_main ();
517 vlib_main_t *fvm = vlib_get_first_main ();
519 vlib_worker_thread_t *w;
520 vlib_main_t *vm_clone;
522 vlib_thread_main_t *tm = &vlib_thread_main;
523 vlib_thread_registration_t *tr;
524 vlib_node_runtime_t *rt;
525 u32 n_vlib_mains = tm->n_vlib_mains;
526 u32 worker_thread_index;
527 u32 stats_err_entry_index = fvm->error_main.stats_err_entry_index;
528 clib_mem_heap_t *main_heap = clib_mem_get_per_cpu_heap ();
529 vlib_stats_register_mem_heap (main_heap);
531 vec_reset_length (vlib_worker_threads);
533 /* Set up the main thread */
534 vec_add2_aligned (vlib_worker_threads, w, 1, CLIB_CACHE_LINE_BYTES);
535 w->elog_track.name = "main thread";
536 elog_track_register (vlib_get_elog_main (), &w->elog_track);
538 if (vec_len (tm->thread_prefix))
540 w->name = format (0, "%v_main%c", tm->thread_prefix, '\0');
541 vlib_set_thread_name ((char *) w->name);
544 vgm->elog_main.lock =
545 clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES, CLIB_CACHE_LINE_BYTES);
546 vgm->elog_main.lock[0] = 0;
548 clib_callback_data_init (&vm->vlib_node_runtime_perf_callbacks,
549 &vm->worker_thread_main_loop_callback_lock);
551 vec_validate_aligned (vgm->vlib_mains, n_vlib_mains - 1,
552 CLIB_CACHE_LINE_BYTES);
553 vec_set_len (vgm->vlib_mains, 0);
554 vec_add1_aligned (vgm->vlib_mains, vm, CLIB_CACHE_LINE_BYTES);
556 if (n_vlib_mains > 1)
558 vlib_worker_threads->wait_at_barrier =
559 clib_mem_alloc_aligned (sizeof (u32), CLIB_CACHE_LINE_BYTES);
560 vlib_worker_threads->workers_at_barrier =
561 clib_mem_alloc_aligned (sizeof (u32), CLIB_CACHE_LINE_BYTES);
563 vlib_worker_threads->node_reforks_required =
564 clib_mem_alloc_aligned (sizeof (u32), CLIB_CACHE_LINE_BYTES);
566 /* We'll need the rpc vector lock... */
567 clib_spinlock_init (&vm->pending_rpc_lock);
569 /* Ask for an initial barrier sync */
570 *vlib_worker_threads->workers_at_barrier = 0;
571 *vlib_worker_threads->wait_at_barrier = 1;
573 /* Without update or refork */
574 *vlib_worker_threads->node_reforks_required = 0;
575 vgm->need_vlib_worker_thread_node_runtime_update = 0;
578 vm->barrier_epoch = 0;
579 vm->barrier_no_close_before = 0;
581 worker_thread_index = 1;
582 clib_spinlock_init (&vm->worker_thread_main_loop_callback_lock);
584 for (i = 0; i < vec_len (tm->registrations); i++)
586 vlib_node_main_t *nm, *nm_clone;
589 tr = tm->registrations[i];
594 for (k = 0; k < tr->count; k++)
599 vec_add2 (vlib_worker_threads, w, 1);
600 /* Currently unused, may not really work */
602 w->thread_mheap = clib_mem_create_heap (0, tr->mheap_size,
607 w->thread_mheap = main_heap;
610 vlib_thread_stack_init (w - vlib_worker_threads);
611 w->thread_function = tr->function;
612 w->thread_function_arg = w;
614 w->registration = tr;
617 (char *) format (0, "%s %d", tr->name, k + 1);
618 vec_add1 (w->elog_track.name, 0);
619 elog_track_register (vlib_get_elog_main (), &w->elog_track);
621 if (tr->no_data_structure_clone)
624 /* Fork vlib_global_main et al. Look for bugs here */
625 oldheap = clib_mem_set_heap (w->thread_mheap);
627 vm_clone = clib_mem_alloc_aligned (sizeof (*vm_clone),
628 CLIB_CACHE_LINE_BYTES);
629 clib_memcpy (vm_clone, vlib_get_first_main (),
632 vm_clone->thread_index = worker_thread_index;
633 vm_clone->pending_rpc_requests = 0;
634 vec_validate (vm_clone->pending_rpc_requests, 0);
635 vec_set_len (vm_clone->pending_rpc_requests, 0);
636 clib_memset (&vm_clone->random_buffer, 0,
637 sizeof (vm_clone->random_buffer));
639 (&vm_clone->worker_thread_main_loop_callback_lock);
640 clib_callback_data_init
641 (&vm_clone->vlib_node_runtime_perf_callbacks,
642 &vm_clone->worker_thread_main_loop_callback_lock);
644 nm = &vlib_get_first_main ()->node_main;
645 nm_clone = &vm_clone->node_main;
646 /* fork next frames array, preserving node runtime indices */
647 nm_clone->next_frames = vec_dup_aligned (nm->next_frames,
648 CLIB_CACHE_LINE_BYTES);
649 for (j = 0; j < vec_len (nm_clone->next_frames); j++)
651 vlib_next_frame_t *nf = &nm_clone->next_frames[j];
652 u32 save_node_runtime_index;
655 save_node_runtime_index = nf->node_runtime_index;
656 save_flags = nf->flags & VLIB_FRAME_NO_FREE_AFTER_DISPATCH;
657 vlib_next_frame_init (nf);
658 nf->node_runtime_index = save_node_runtime_index;
659 nf->flags = save_flags;
662 /* fork the frame dispatch queue */
663 nm_clone->pending_frames = 0;
664 vec_validate (nm_clone->pending_frames, 10);
665 vec_set_len (nm_clone->pending_frames, 0);
670 /* Allocate all nodes in single block for speed */
671 n = clib_mem_alloc_no_fail (vec_len (nm->nodes) * sizeof (*n));
673 for (j = 0; j < vec_len (nm->nodes); j++)
675 clib_memcpy (n, nm->nodes[j], sizeof (*n));
676 /* none of the copied nodes have enqueue rights given out */
677 n->owner_node_index = VLIB_INVALID_NODE_INDEX;
678 clib_memset (&n->stats_total, 0, sizeof (n->stats_total));
679 clib_memset (&n->stats_last_clear, 0,
680 sizeof (n->stats_last_clear));
681 vec_add1 (nm_clone->nodes, n);
684 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL] =
685 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL],
686 CLIB_CACHE_LINE_BYTES);
688 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL])
690 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
691 /* copy initial runtime_data from node */
692 if (n->runtime_data && n->runtime_data_bytes > 0)
693 clib_memcpy (rt->runtime_data, n->runtime_data,
694 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
695 n->runtime_data_bytes));
698 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT] =
699 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_INPUT],
700 CLIB_CACHE_LINE_BYTES);
701 clib_interrupt_init (
702 &nm_clone->input_node_interrupts,
703 vec_len (nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT]));
704 clib_interrupt_init (
705 &nm_clone->pre_input_node_interrupts,
706 vec_len (nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT]));
707 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT])
709 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
710 /* copy initial runtime_data from node */
711 if (n->runtime_data && n->runtime_data_bytes > 0)
712 clib_memcpy (rt->runtime_data, n->runtime_data,
713 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
714 n->runtime_data_bytes));
717 nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT] =
718 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT],
719 CLIB_CACHE_LINE_BYTES);
721 nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT])
723 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
724 /* copy initial runtime_data from node */
725 if (n->runtime_data && n->runtime_data_bytes > 0)
726 clib_memcpy (rt->runtime_data, n->runtime_data,
727 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
728 n->runtime_data_bytes));
731 nm_clone->processes = vec_dup_aligned (nm->processes,
732 CLIB_CACHE_LINE_BYTES);
734 /* Create per-thread frame freelist */
735 nm_clone->frame_sizes = 0;
736 nm_clone->node_by_error = nm->node_by_error;
738 /* Packet trace buffers are guaranteed to be empty, nothing to do here */
740 clib_mem_set_heap (oldheap);
741 vec_add1_aligned (vgm->vlib_mains, vm_clone,
742 CLIB_CACHE_LINE_BYTES);
744 /* Switch to the stats segment ... */
745 vlib_stats_validate (stats_err_entry_index, worker_thread_index,
746 vec_len (fvm->error_main.counters) - 1);
747 c = vlib_stats_get_entry_data_pointer (stats_err_entry_index);
748 vm_clone->error_main.counters = c[worker_thread_index];
750 vm_clone->error_main.counters_last_clear = vec_dup_aligned (
751 vlib_get_first_main ()->error_main.counters_last_clear,
752 CLIB_CACHE_LINE_BYTES);
754 worker_thread_index++;
760 /* only have non-data-structure copy threads to create... */
761 for (i = 0; i < vec_len (tm->registrations); i++)
763 tr = tm->registrations[i];
765 for (j = 0; j < tr->count; j++)
767 vec_add2 (vlib_worker_threads, w, 1);
770 w->thread_mheap = clib_mem_create_heap (0, tr->mheap_size,
776 w->thread_mheap = main_heap;
778 vlib_thread_stack_init (w - vlib_worker_threads);
779 w->thread_function = tr->function;
780 w->thread_function_arg = w;
783 (char *) format (0, "%s %d", tr->name, j + 1);
784 w->registration = tr;
785 vec_add1 (w->elog_track.name, 0);
786 elog_track_register (vlib_get_elog_main (), &w->elog_track);
791 worker_thread_index = 1;
793 for (i = 0; i < vec_len (tm->registrations); i++)
798 tr = tm->registrations[i];
800 if (tr->use_pthreads || tm->use_pthreads)
802 for (j = 0; j < tr->count; j++)
804 w = vlib_worker_threads + worker_thread_index++;
805 err = vlib_launch_thread_int (vlib_worker_thread_bootstrap_fn,
808 clib_error_report (err);
815 clib_bitmap_foreach (c, tr->coremask) {
816 w = vlib_worker_threads + worker_thread_index++;
817 err = vlib_launch_thread_int (vlib_worker_thread_bootstrap_fn,
820 clib_error_report (err);
825 vlib_worker_thread_barrier_sync (vm);
828 err = vlib_call_init_exit_functions (
829 vm, &vgm->num_workers_change_function_registrations, 1 /* call_once */,
832 clib_error_report (err);
834 vlib_worker_thread_barrier_release (vm);
838 VLIB_MAIN_LOOP_ENTER_FUNCTION (start_workers);
842 worker_thread_node_runtime_update_internal (void)
846 vlib_node_main_t *nm, *nm_clone;
847 vlib_main_t *vm_clone;
848 vlib_node_runtime_t *rt;
850 ASSERT (vlib_get_thread_index () == 0);
852 vm = vlib_get_first_main ();
855 ASSERT (*vlib_worker_threads->wait_at_barrier == 1);
858 * Scrape all runtime stats, so we don't lose node runtime(s) with
859 * pending counts, or throw away worker / io thread counts.
861 for (j = 0; j < vec_len (nm->nodes); j++)
865 vlib_node_sync_stats (vm, n);
868 for (i = 1; i < vlib_get_n_threads (); i++)
872 vm_clone = vlib_get_main_by_index (i);
873 nm_clone = &vm_clone->node_main;
875 for (j = 0; j < vec_len (nm_clone->nodes); j++)
877 n = nm_clone->nodes[j];
879 rt = vlib_node_get_runtime (vm_clone, n->index);
880 vlib_node_runtime_sync_stats (vm_clone, rt, 0, 0, 0);
884 /* Per-worker clone rebuilds are now done on each thread */
889 vlib_worker_thread_node_refork (void)
891 vlib_main_t *vm, *vm_clone;
892 vlib_node_main_t *nm, *nm_clone;
893 vlib_node_t **old_nodes_clone;
894 vlib_node_runtime_t *rt, *old_rt;
897 vlib_node_t *new_n_clone;
901 vm = vlib_get_first_main ();
903 vm_clone = vlib_get_main ();
904 nm_clone = &vm_clone->node_main;
906 /* Re-clone error heap */
907 u64 *old_counters_all_clear = vm_clone->error_main.counters_last_clear;
909 clib_memcpy_fast (&vm_clone->error_main, &vm->error_main,
910 sizeof (vm->error_main));
911 j = vec_len (vm->error_main.counters) - 1;
913 c = vlib_stats_get_entry_data_pointer (vm->error_main.stats_err_entry_index);
914 vm_clone->error_main.counters = c[vm_clone->thread_index];
916 vec_validate_aligned (old_counters_all_clear, j, CLIB_CACHE_LINE_BYTES);
917 vm_clone->error_main.counters_last_clear = old_counters_all_clear;
919 for (j = 0; j < vec_len (nm_clone->next_frames); j++)
921 vlib_next_frame_t *nf = &nm_clone->next_frames[j];
922 if ((nf->flags & VLIB_FRAME_IS_ALLOCATED) && nf->frame != NULL)
924 vlib_frame_t *f = nf->frame;
926 vlib_frame_free (vm_clone, f);
930 vec_free (nm_clone->next_frames);
931 nm_clone->next_frames = vec_dup_aligned (nm->next_frames,
932 CLIB_CACHE_LINE_BYTES);
934 for (j = 0; j < vec_len (nm_clone->next_frames); j++)
936 vlib_next_frame_t *nf = &nm_clone->next_frames[j];
937 u32 save_node_runtime_index;
940 save_node_runtime_index = nf->node_runtime_index;
941 save_flags = nf->flags & VLIB_FRAME_NO_FREE_AFTER_DISPATCH;
942 vlib_next_frame_init (nf);
943 nf->node_runtime_index = save_node_runtime_index;
944 nf->flags = save_flags;
947 old_nodes_clone = nm_clone->nodes;
952 /* Allocate all nodes in single block for speed */
954 clib_mem_alloc_no_fail (vec_len (nm->nodes) * sizeof (*new_n_clone));
955 for (j = 0; j < vec_len (nm->nodes); j++)
957 vlib_node_t *new_n = nm->nodes[j];
959 clib_memcpy_fast (new_n_clone, new_n, sizeof (*new_n));
960 /* none of the copied nodes have enqueue rights given out */
961 new_n_clone->owner_node_index = VLIB_INVALID_NODE_INDEX;
963 if (j >= vec_len (old_nodes_clone))
965 /* new node, set to zero */
966 clib_memset (&new_n_clone->stats_total, 0,
967 sizeof (new_n_clone->stats_total));
968 clib_memset (&new_n_clone->stats_last_clear, 0,
969 sizeof (new_n_clone->stats_last_clear));
973 vlib_node_t *old_n_clone = old_nodes_clone[j];
974 /* Copy stats if the old data is valid */
975 clib_memcpy_fast (&new_n_clone->stats_total,
976 &old_n_clone->stats_total,
977 sizeof (new_n_clone->stats_total));
978 clib_memcpy_fast (&new_n_clone->stats_last_clear,
979 &old_n_clone->stats_last_clear,
980 sizeof (new_n_clone->stats_last_clear));
982 /* keep previous node state */
983 new_n_clone->state = old_n_clone->state;
984 new_n_clone->flags = old_n_clone->flags;
986 vec_add1 (nm_clone->nodes, new_n_clone);
989 /* Free the old node clones */
990 clib_mem_free (old_nodes_clone[0]);
992 vec_free (old_nodes_clone);
995 /* re-clone internal nodes */
996 old_rt = nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL];
997 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL] =
998 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL],
999 CLIB_CACHE_LINE_BYTES);
1001 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL])
1003 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
1004 /* copy runtime_data, will be overwritten later for existing rt */
1005 if (n->runtime_data && n->runtime_data_bytes > 0)
1006 clib_memcpy_fast (rt->runtime_data, n->runtime_data,
1007 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
1008 n->runtime_data_bytes));
1011 for (j = 0; j < vec_len (old_rt); j++)
1013 rt = vlib_node_get_runtime (vm_clone, old_rt[j].node_index);
1014 rt->state = old_rt[j].state;
1015 rt->flags = old_rt[j].flags;
1016 clib_memcpy_fast (rt->runtime_data, old_rt[j].runtime_data,
1017 VLIB_NODE_RUNTIME_DATA_SIZE);
1022 /* re-clone input nodes */
1023 old_rt = nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT];
1024 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT] =
1025 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_INPUT],
1026 CLIB_CACHE_LINE_BYTES);
1027 clib_interrupt_resize (
1028 &nm_clone->input_node_interrupts,
1029 vec_len (nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT]));
1030 clib_interrupt_resize (
1031 &nm_clone->pre_input_node_interrupts,
1032 vec_len (nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT]));
1034 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT])
1036 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
1037 /* copy runtime_data, will be overwritten later for existing rt */
1038 if (n->runtime_data && n->runtime_data_bytes > 0)
1039 clib_memcpy_fast (rt->runtime_data, n->runtime_data,
1040 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
1041 n->runtime_data_bytes));
1044 for (j = 0; j < vec_len (old_rt); j++)
1046 rt = vlib_node_get_runtime (vm_clone, old_rt[j].node_index);
1047 rt->state = old_rt[j].state;
1048 rt->flags = old_rt[j].flags;
1049 clib_memcpy_fast (rt->runtime_data, old_rt[j].runtime_data,
1050 VLIB_NODE_RUNTIME_DATA_SIZE);
1055 /* re-clone pre-input nodes */
1056 old_rt = nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT];
1057 nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT] =
1058 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT],
1059 CLIB_CACHE_LINE_BYTES);
1061 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT])
1063 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
1064 /* copy runtime_data, will be overwritten later for existing rt */
1065 if (n->runtime_data && n->runtime_data_bytes > 0)
1066 clib_memcpy_fast (rt->runtime_data, n->runtime_data,
1067 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
1068 n->runtime_data_bytes));
1071 for (j = 0; j < vec_len (old_rt); j++)
1073 rt = vlib_node_get_runtime (vm_clone, old_rt[j].node_index);
1074 rt->state = old_rt[j].state;
1075 rt->flags = old_rt[j].flags;
1076 clib_memcpy_fast (rt->runtime_data, old_rt[j].runtime_data,
1077 VLIB_NODE_RUNTIME_DATA_SIZE);
1082 vec_free (nm_clone->processes);
1083 nm_clone->processes = vec_dup_aligned (nm->processes,
1084 CLIB_CACHE_LINE_BYTES);
1085 nm_clone->node_by_error = nm->node_by_error;
1089 vlib_worker_thread_node_runtime_update (void)
1092 * Make a note that we need to do a node runtime update
1093 * prior to releasing the barrier.
1095 vlib_global_main.need_vlib_worker_thread_node_runtime_update = 1;
1099 unformat_sched_policy (unformat_input_t * input, va_list * args)
1101 u32 *r = va_arg (*args, u32 *);
1104 #define _(v,f,s) else if (unformat (input, s)) *r = SCHED_POLICY_##f;
1105 foreach_sched_policy
1112 static clib_error_t *
1113 cpu_config (vlib_main_t * vm, unformat_input_t * input)
1115 vlib_thread_registration_t *tr;
1117 vlib_thread_main_t *tm = &vlib_thread_main;
1122 tm->thread_registrations_by_name = hash_create_string (0, sizeof (uword));
1124 tm->n_thread_stacks = 1; /* account for main thread */
1125 tm->sched_policy = ~0;
1126 tm->sched_priority = ~0;
1127 tm->main_lcore = ~0;
1133 hash_set_mem (tm->thread_registrations_by_name, tr->name, (uword) tr);
1137 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1139 if (unformat (input, "use-pthreads"))
1140 tm->use_pthreads = 1;
1141 else if (unformat (input, "thread-prefix %v", &tm->thread_prefix))
1143 else if (unformat (input, "main-core %u", &tm->main_lcore))
1145 else if (unformat (input, "skip-cores %u", &tm->skip_cores))
1147 else if (unformat (input, "numa-heap-size %U",
1148 unformat_memory_size, &tm->numa_heap_size))
1150 else if (unformat (input, "coremask-%s %U", &name,
1151 unformat_bitmap_mask, &bitmap) ||
1152 unformat (input, "corelist-%s %U", &name,
1153 unformat_bitmap_list, &bitmap))
1155 p = hash_get_mem (tm->thread_registrations_by_name, name);
1157 return clib_error_return (0, "no such thread type '%s'", name);
1159 tr = (vlib_thread_registration_t *) p[0];
1161 if (tr->use_pthreads)
1162 return clib_error_return (0,
1163 "corelist cannot be set for '%s' threads",
1166 return clib_error_return
1167 (0, "core placement of '%s' threads is already configured",
1170 tr->coremask = bitmap;
1171 tr->count = clib_bitmap_count_set_bits (tr->coremask);
1175 (input, "scheduler-policy %U", unformat_sched_policy,
1178 else if (unformat (input, "scheduler-priority %u", &tm->sched_priority))
1180 else if (unformat (input, "%s %u", &name, &count))
1182 p = hash_get_mem (tm->thread_registrations_by_name, name);
1184 return clib_error_return (0, "no such thread type 3 '%s'", name);
1186 tr = (vlib_thread_registration_t *) p[0];
1188 if (tr->fixed_count)
1189 return clib_error_return
1190 (0, "number of '%s' threads not configurable", name);
1192 return clib_error_return
1193 (0, "number of '%s' threads is already configured", name);
1201 if (tm->sched_priority != ~0)
1203 if (tm->sched_policy == SCHED_FIFO || tm->sched_policy == SCHED_RR)
1205 u32 prio_max = sched_get_priority_max (tm->sched_policy);
1206 u32 prio_min = sched_get_priority_min (tm->sched_policy);
1207 if (tm->sched_priority > prio_max)
1208 tm->sched_priority = prio_max;
1209 if (tm->sched_priority < prio_min)
1210 tm->sched_priority = prio_min;
1214 return clib_error_return
1216 "scheduling priority (%d) is not allowed for `normal` scheduling policy",
1217 tm->sched_priority);
1222 if (!tm->thread_prefix)
1223 tm->thread_prefix = format (0, "vpp");
1227 tm->n_thread_stacks += tr->count;
1228 tm->n_pthreads += tr->count * tr->use_pthreads;
1229 tm->n_threads += tr->count * (tr->use_pthreads == 0);
1236 VLIB_EARLY_CONFIG_FUNCTION (cpu_config, "cpu");
1239 * Enforce minimum open time to minimize packet loss due to Rx overflow,
1240 * based on a test based heuristic that barrier should be open for at least
1241 * 3 time as long as it is closed (with an upper bound of 1ms because by that
1242 * point it is probably too late to make a difference)
1245 #ifndef BARRIER_MINIMUM_OPEN_LIMIT
1246 #define BARRIER_MINIMUM_OPEN_LIMIT 0.001
1249 #ifndef BARRIER_MINIMUM_OPEN_FACTOR
1250 #define BARRIER_MINIMUM_OPEN_FACTOR 3
1254 vlib_worker_thread_initial_barrier_sync_and_release (vlib_main_t * vm)
1257 f64 now = vlib_time_now (vm);
1258 u32 count = vlib_get_n_threads () - 1;
1260 /* No worker threads? */
1264 deadline = now + BARRIER_SYNC_TIMEOUT;
1265 *vlib_worker_threads->wait_at_barrier = 1;
1266 while (*vlib_worker_threads->workers_at_barrier != count)
1268 if ((now = vlib_time_now (vm)) > deadline)
1270 fformat (stderr, "%s: worker thread deadlock\n", __FUNCTION__);
1275 *vlib_worker_threads->wait_at_barrier = 0;
1279 * Return true if the wroker thread barrier is held
1282 vlib_worker_thread_barrier_held (void)
1284 if (vlib_get_n_threads () < 2)
1287 return (*vlib_worker_threads->wait_at_barrier == 1);
1291 vlib_worker_thread_barrier_sync_int (vlib_main_t * vm, const char *func_name)
1298 f64 max_vector_rate;
1302 if (vlib_get_n_threads () < 2)
1305 ASSERT (vlib_get_thread_index () == 0);
1307 vlib_worker_threads[0].barrier_caller = func_name;
1308 count = vlib_get_n_threads () - 1;
1310 /* Record entry relative to last close */
1311 now = vlib_time_now (vm);
1312 t_entry = now - vm->barrier_epoch;
1314 /* Tolerate recursive calls */
1315 if (++vlib_worker_threads[0].recursion_level > 1)
1317 barrier_trace_sync_rec (t_entry);
1321 if (PREDICT_FALSE (vec_len (vm->barrier_perf_callbacks) != 0))
1322 clib_call_callbacks (vm->barrier_perf_callbacks, vm,
1323 vm->clib_time.last_cpu_time, 0 /* enter */ );
1326 * Need data to decide if we're working hard enough to honor
1327 * the barrier hold-down timer.
1329 max_vector_rate = 0.0;
1330 for (i = 1; i < vlib_get_n_threads (); i++)
1332 vlib_main_t *ovm = vlib_get_main_by_index (i);
1333 max_vector_rate = clib_max (max_vector_rate,
1334 (f64) vlib_last_vectors_per_main_loop (ovm));
1337 vlib_worker_threads[0].barrier_sync_count++;
1339 /* Enforce minimum barrier open time to minimize packet loss */
1340 ASSERT (vm->barrier_no_close_before <= (now + BARRIER_MINIMUM_OPEN_LIMIT));
1343 * If any worker thread seems busy, which we define
1344 * as a vector rate above 10, we enforce the barrier hold-down timer
1346 if (max_vector_rate > 10.0)
1350 now = vlib_time_now (vm);
1351 /* Barrier hold-down timer expired? */
1352 if (now >= vm->barrier_no_close_before)
1354 if ((vm->barrier_no_close_before - now)
1355 > (2.0 * BARRIER_MINIMUM_OPEN_LIMIT))
1358 ("clock change: would have waited for %.4f seconds",
1359 (vm->barrier_no_close_before - now));
1364 /* Record time of closure */
1365 t_open = now - vm->barrier_epoch;
1366 vm->barrier_epoch = now;
1368 deadline = now + BARRIER_SYNC_TIMEOUT;
1370 *vlib_worker_threads->wait_at_barrier = 1;
1371 while (*vlib_worker_threads->workers_at_barrier != count)
1373 if ((now = vlib_time_now (vm)) > deadline)
1375 fformat (stderr, "%s: worker thread deadlock\n", __FUNCTION__);
1380 t_closed = now - vm->barrier_epoch;
1382 barrier_trace_sync (t_entry, t_open, t_closed);
1387 vlib_worker_thread_barrier_release (vlib_main_t * vm)
1389 vlib_global_main_t *vgm = vlib_get_global_main ();
1395 f64 t_update_main = 0.0;
1396 int refork_needed = 0;
1398 if (vlib_get_n_threads () < 2)
1401 ASSERT (vlib_get_thread_index () == 0);
1404 now = vlib_time_now (vm);
1405 t_entry = now - vm->barrier_epoch;
1407 if (--vlib_worker_threads[0].recursion_level > 0)
1409 barrier_trace_release_rec (t_entry);
1413 /* Update (all) node runtimes before releasing the barrier, if needed */
1414 if (vgm->need_vlib_worker_thread_node_runtime_update)
1417 * Lock stat segment here, so we's safe when
1418 * rebuilding the stat segment node clones from the
1421 vlib_stats_segment_lock ();
1423 /* Do stats elements on main thread */
1424 worker_thread_node_runtime_update_internal ();
1425 vgm->need_vlib_worker_thread_node_runtime_update = 0;
1427 /* Do per thread rebuilds in parallel */
1429 clib_atomic_fetch_add (vlib_worker_threads->node_reforks_required,
1430 (vlib_get_n_threads () - 1));
1431 now = vlib_time_now (vm);
1432 t_update_main = now - vm->barrier_epoch;
1435 deadline = now + BARRIER_SYNC_TIMEOUT;
1438 * Note when we let go of the barrier.
1439 * Workers can use this to derive a reasonably accurate
1440 * time offset. See vlib_time_now(...)
1442 vm->time_last_barrier_release = vlib_time_now (vm);
1443 CLIB_MEMORY_STORE_BARRIER ();
1445 *vlib_worker_threads->wait_at_barrier = 0;
1447 while (*vlib_worker_threads->workers_at_barrier > 0)
1449 if ((now = vlib_time_now (vm)) > deadline)
1451 fformat (stderr, "%s: worker thread deadlock\n", __FUNCTION__);
1456 /* Wait for reforks before continuing */
1459 now = vlib_time_now (vm);
1461 deadline = now + BARRIER_SYNC_TIMEOUT;
1463 while (*vlib_worker_threads->node_reforks_required > 0)
1465 if ((now = vlib_time_now (vm)) > deadline)
1467 fformat (stderr, "%s: worker thread refork deadlock\n",
1472 vlib_stats_segment_unlock ();
1475 t_closed_total = now - vm->barrier_epoch;
1477 minimum_open = t_closed_total * BARRIER_MINIMUM_OPEN_FACTOR;
1479 if (minimum_open > BARRIER_MINIMUM_OPEN_LIMIT)
1481 minimum_open = BARRIER_MINIMUM_OPEN_LIMIT;
1484 vm->barrier_no_close_before = now + minimum_open;
1486 /* Record barrier epoch (used to enforce minimum open time) */
1487 vm->barrier_epoch = now;
1489 barrier_trace_release (t_entry, t_closed_total, t_update_main);
1491 if (PREDICT_FALSE (vec_len (vm->barrier_perf_callbacks) != 0))
1492 clib_call_callbacks (vm->barrier_perf_callbacks, vm,
1493 vm->clib_time.last_cpu_time, 1 /* leave */ );
1497 vlib_worker_sync_rpc (void *args)
1499 ASSERT (vlib_thread_is_main_w_barrier ());
1500 vlib_worker_threads->wait_before_barrier = 0;
1504 vlib_workers_sync (void)
1506 if (PREDICT_FALSE (!vlib_num_workers ()))
1509 if (!(*vlib_worker_threads->wait_at_barrier) &&
1510 !clib_atomic_swap_rel_n (&vlib_worker_threads->wait_before_barrier, 1))
1512 u32 thread_index = vlib_get_thread_index ();
1513 vlib_rpc_call_main_thread (vlib_worker_sync_rpc, (u8 *) &thread_index,
1514 sizeof (thread_index));
1517 /* Wait until main thread asks for barrier */
1518 while (!(*vlib_worker_threads->wait_at_barrier))
1521 /* Stop before barrier and make sure all threads are either
1522 * at worker barrier or the barrier before it */
1523 clib_atomic_fetch_add (&vlib_worker_threads->workers_before_barrier, 1);
1524 while (vlib_num_workers () > (*vlib_worker_threads->workers_at_barrier +
1525 vlib_worker_threads->workers_before_barrier))
1530 vlib_workers_continue (void)
1532 if (PREDICT_FALSE (!vlib_num_workers ()))
1535 clib_atomic_fetch_add (&vlib_worker_threads->done_work_before_barrier, 1);
1537 /* Wait until all workers are done with work before barrier */
1538 while (vlib_worker_threads->done_work_before_barrier <
1539 vlib_worker_threads->workers_before_barrier)
1542 clib_atomic_fetch_add (&vlib_worker_threads->done_work_before_barrier, -1);
1543 clib_atomic_fetch_add (&vlib_worker_threads->workers_before_barrier, -1);
1547 * Wait until each of the workers has been once around the track
1550 vlib_worker_wait_one_loop (void)
1552 vlib_global_main_t *vgm = vlib_get_global_main ();
1553 ASSERT (vlib_get_thread_index () == 0);
1555 if (vlib_get_n_threads () < 2)
1558 if (vlib_worker_thread_barrier_held ())
1564 vec_validate (counts, vlib_get_n_threads () - 1);
1566 /* record the current loop counts */
1567 vec_foreach_index (ii, vgm->vlib_mains)
1568 counts[ii] = vgm->vlib_mains[ii]->main_loop_count;
1570 /* spin until each changes, apart from the main thread, or we'd be
1572 for (ii = 1; ii < vec_len (counts); ii++)
1574 while (counts[ii] == vgm->vlib_mains[ii]->main_loop_count)
1583 vlib_worker_thread_fn (void *arg)
1585 vlib_global_main_t *vgm = vlib_get_global_main ();
1586 vlib_worker_thread_t *w = (vlib_worker_thread_t *) arg;
1587 vlib_main_t *vm = vlib_get_main ();
1590 ASSERT (vm->thread_index == vlib_get_thread_index ());
1592 vlib_worker_thread_init (w);
1593 clib_time_init (&vm->clib_time);
1594 clib_mem_set_heap (w->thread_mheap);
1596 vm->worker_init_functions_called = hash_create (0, 0);
1598 e = vlib_call_init_exit_functions_no_sort (
1599 vm, &vgm->worker_init_function_registrations, 1 /* call_once */,
1602 clib_error_report (e);
1604 vlib_worker_loop (vm);
1608 VLIB_REGISTER_THREAD (worker_thread_reg, static) = {
1611 .function = vlib_worker_thread_fn,
1615 extern clib_march_fn_registration
1616 *vlib_frame_queue_dequeue_with_aux_fn_march_fn_registrations;
1617 extern clib_march_fn_registration
1618 *vlib_frame_queue_dequeue_fn_march_fn_registrations;
1620 vlib_frame_queue_main_init (u32 node_index, u32 frame_queue_nelts)
1622 vlib_thread_main_t *tm = vlib_get_thread_main ();
1623 vlib_main_t *vm = vlib_get_main ();
1624 vlib_frame_queue_main_t *fqm;
1625 vlib_frame_queue_t *fq;
1630 if (frame_queue_nelts == 0)
1631 frame_queue_nelts = FRAME_QUEUE_MAX_NELTS;
1633 num_threads = 1 /* main thread */ + tm->n_threads;
1634 ASSERT (frame_queue_nelts >= 8 + num_threads);
1636 vec_add2 (tm->frame_queue_mains, fqm, 1);
1638 node = vlib_get_node (vm, fqm->node_index);
1640 if (node->aux_offset)
1642 fqm->frame_queue_dequeue_fn =
1643 CLIB_MARCH_FN_VOID_POINTER (vlib_frame_queue_dequeue_with_aux_fn);
1647 fqm->frame_queue_dequeue_fn =
1648 CLIB_MARCH_FN_VOID_POINTER (vlib_frame_queue_dequeue_fn);
1651 fqm->node_index = node_index;
1652 fqm->frame_queue_nelts = frame_queue_nelts;
1654 vec_validate (fqm->vlib_frame_queues, tm->n_vlib_mains - 1);
1655 vec_set_len (fqm->vlib_frame_queues, 0);
1656 for (i = 0; i < tm->n_vlib_mains; i++)
1658 fq = vlib_frame_queue_alloc (frame_queue_nelts);
1659 vec_add1 (fqm->vlib_frame_queues, fq);
1662 return (fqm - tm->frame_queue_mains);
1666 vlib_process_signal_event_mt_helper (vlib_process_signal_event_mt_args_t *
1669 ASSERT (vlib_get_thread_index () == 0);
1670 vlib_process_signal_event (vlib_get_main (), args->node_index,
1671 args->type_opaque, args->data);
1674 void *rpc_call_main_thread_cb_fn;
1677 vlib_rpc_call_main_thread (void *callback, u8 * args, u32 arg_size)
1679 if (rpc_call_main_thread_cb_fn)
1681 void (*fp) (void *, u8 *, u32) = rpc_call_main_thread_cb_fn;
1682 (*fp) (callback, args, arg_size);
1685 clib_warning ("BUG: rpc_call_main_thread_cb_fn NULL!");
1689 threads_init (vlib_main_t * vm)
1691 const vlib_thread_main_t *tm = vlib_get_thread_main ();
1693 if (tm->main_lcore == ~0 && tm->n_vlib_mains > 1)
1694 return clib_error_return (0, "Configuration error, a main core must "
1695 "be specified when using worker threads");
1700 VLIB_INIT_FUNCTION (threads_init);
1702 static clib_error_t *
1703 show_clock_command_fn (vlib_main_t * vm,
1704 unformat_input_t * input, vlib_cli_command_t * cmd)
1707 clib_timebase_t _tb, *tb = &_tb;
1709 (void) unformat (input, "verbose %=", &verbose, 1);
1711 clib_timebase_init (tb, 0 /* GMT */ , CLIB_TIMEBASE_DAYLIGHT_NONE,
1714 vlib_cli_output (vm, "%U, %U GMT", format_clib_time, &vm->clib_time,
1715 verbose, format_clib_timebase_time,
1716 clib_timebase_now (tb));
1718 vlib_cli_output (vm, "Time last barrier release %.9f",
1719 vm->time_last_barrier_release);
1721 foreach_vlib_main ()
1723 vlib_cli_output (vm, "%d: %U", this_vlib_main->thread_index,
1724 format_clib_time, &this_vlib_main->clib_time, verbose);
1726 vlib_cli_output (vm, "Thread %d offset %.9f error %.9f",
1727 this_vlib_main->thread_index,
1728 this_vlib_main->time_offset,
1729 vm->time_last_barrier_release -
1730 this_vlib_main->time_last_barrier_release);
1736 VLIB_CLI_COMMAND (f_command, static) =
1738 .path = "show clock",
1739 .short_help = "show clock",
1740 .function = show_clock_command_fn,
1744 vlib_thread_main_t *
1745 vlib_get_thread_main_not_inline (void)
1747 return vlib_get_thread_main ();
1751 * fd.io coding-style-patch-verification: ON
1754 * eval: (c-set-style "gnu")