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->interrupts,
703 vec_len (nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT]));
704 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT])
706 vlib_node_t *n = vlib_get_node (vm, rt->node_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 /* copy initial runtime_data from node */
722 if (n->runtime_data && n->runtime_data_bytes > 0)
723 clib_memcpy (rt->runtime_data, n->runtime_data,
724 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
725 n->runtime_data_bytes));
728 nm_clone->processes = vec_dup_aligned (nm->processes,
729 CLIB_CACHE_LINE_BYTES);
731 /* Create per-thread frame freelist */
732 nm_clone->frame_sizes = 0;
733 nm_clone->node_by_error = nm->node_by_error;
735 /* Packet trace buffers are guaranteed to be empty, nothing to do here */
737 clib_mem_set_heap (oldheap);
738 vec_add1_aligned (vgm->vlib_mains, vm_clone,
739 CLIB_CACHE_LINE_BYTES);
741 /* Switch to the stats segment ... */
742 vlib_stats_validate (stats_err_entry_index, worker_thread_index,
743 vec_len (fvm->error_main.counters) - 1);
744 c = vlib_stats_get_entry_data_pointer (stats_err_entry_index);
745 vm_clone->error_main.counters = c[worker_thread_index];
747 vm_clone->error_main.counters_last_clear = vec_dup_aligned (
748 vlib_get_first_main ()->error_main.counters_last_clear,
749 CLIB_CACHE_LINE_BYTES);
751 worker_thread_index++;
757 /* only have non-data-structure copy threads to create... */
758 for (i = 0; i < vec_len (tm->registrations); i++)
760 tr = tm->registrations[i];
762 for (j = 0; j < tr->count; j++)
764 vec_add2 (vlib_worker_threads, w, 1);
767 w->thread_mheap = clib_mem_create_heap (0, tr->mheap_size,
773 w->thread_mheap = main_heap;
775 vlib_thread_stack_init (w - vlib_worker_threads);
776 w->thread_function = tr->function;
777 w->thread_function_arg = w;
780 (char *) format (0, "%s %d", tr->name, j + 1);
781 w->registration = tr;
782 vec_add1 (w->elog_track.name, 0);
783 elog_track_register (vlib_get_elog_main (), &w->elog_track);
788 worker_thread_index = 1;
790 for (i = 0; i < vec_len (tm->registrations); i++)
795 tr = tm->registrations[i];
797 if (tr->use_pthreads || tm->use_pthreads)
799 for (j = 0; j < tr->count; j++)
801 w = vlib_worker_threads + worker_thread_index++;
802 err = vlib_launch_thread_int (vlib_worker_thread_bootstrap_fn,
805 clib_error_report (err);
812 clib_bitmap_foreach (c, tr->coremask) {
813 w = vlib_worker_threads + worker_thread_index++;
814 err = vlib_launch_thread_int (vlib_worker_thread_bootstrap_fn,
817 clib_error_report (err);
822 vlib_worker_thread_barrier_sync (vm);
825 err = vlib_call_init_exit_functions (
826 vm, &vgm->num_workers_change_function_registrations, 1 /* call_once */,
829 clib_error_report (err);
831 vlib_worker_thread_barrier_release (vm);
835 VLIB_MAIN_LOOP_ENTER_FUNCTION (start_workers);
839 worker_thread_node_runtime_update_internal (void)
843 vlib_node_main_t *nm, *nm_clone;
844 vlib_main_t *vm_clone;
845 vlib_node_runtime_t *rt;
847 ASSERT (vlib_get_thread_index () == 0);
849 vm = vlib_get_first_main ();
852 ASSERT (*vlib_worker_threads->wait_at_barrier == 1);
855 * Scrape all runtime stats, so we don't lose node runtime(s) with
856 * pending counts, or throw away worker / io thread counts.
858 for (j = 0; j < vec_len (nm->nodes); j++)
862 vlib_node_sync_stats (vm, n);
865 for (i = 1; i < vlib_get_n_threads (); i++)
869 vm_clone = vlib_get_main_by_index (i);
870 nm_clone = &vm_clone->node_main;
872 for (j = 0; j < vec_len (nm_clone->nodes); j++)
874 n = nm_clone->nodes[j];
876 rt = vlib_node_get_runtime (vm_clone, n->index);
877 vlib_node_runtime_sync_stats (vm_clone, rt, 0, 0, 0);
881 /* Per-worker clone rebuilds are now done on each thread */
886 vlib_worker_thread_node_refork (void)
888 vlib_main_t *vm, *vm_clone;
889 vlib_node_main_t *nm, *nm_clone;
890 vlib_node_t **old_nodes_clone;
891 vlib_node_runtime_t *rt, *old_rt;
894 vlib_node_t *new_n_clone;
898 vm = vlib_get_first_main ();
900 vm_clone = vlib_get_main ();
901 nm_clone = &vm_clone->node_main;
903 /* Re-clone error heap */
904 u64 *old_counters_all_clear = vm_clone->error_main.counters_last_clear;
906 clib_memcpy_fast (&vm_clone->error_main, &vm->error_main,
907 sizeof (vm->error_main));
908 j = vec_len (vm->error_main.counters) - 1;
910 c = vlib_stats_get_entry_data_pointer (vm->error_main.stats_err_entry_index);
911 vm_clone->error_main.counters = c[vm_clone->thread_index];
913 vec_validate_aligned (old_counters_all_clear, j, CLIB_CACHE_LINE_BYTES);
914 vm_clone->error_main.counters_last_clear = old_counters_all_clear;
916 for (j = 0; j < vec_len (nm_clone->next_frames); j++)
918 vlib_next_frame_t *nf = &nm_clone->next_frames[j];
919 if ((nf->flags & VLIB_FRAME_IS_ALLOCATED) && nf->frame != NULL)
921 vlib_frame_t *f = nf->frame;
923 vlib_frame_free (vm_clone, f);
927 vec_free (nm_clone->next_frames);
928 nm_clone->next_frames = vec_dup_aligned (nm->next_frames,
929 CLIB_CACHE_LINE_BYTES);
931 for (j = 0; j < vec_len (nm_clone->next_frames); j++)
933 vlib_next_frame_t *nf = &nm_clone->next_frames[j];
934 u32 save_node_runtime_index;
937 save_node_runtime_index = nf->node_runtime_index;
938 save_flags = nf->flags & VLIB_FRAME_NO_FREE_AFTER_DISPATCH;
939 vlib_next_frame_init (nf);
940 nf->node_runtime_index = save_node_runtime_index;
941 nf->flags = save_flags;
944 old_nodes_clone = nm_clone->nodes;
949 /* Allocate all nodes in single block for speed */
951 clib_mem_alloc_no_fail (vec_len (nm->nodes) * sizeof (*new_n_clone));
952 for (j = 0; j < vec_len (nm->nodes); j++)
954 vlib_node_t *new_n = nm->nodes[j];
956 clib_memcpy_fast (new_n_clone, new_n, sizeof (*new_n));
957 /* none of the copied nodes have enqueue rights given out */
958 new_n_clone->owner_node_index = VLIB_INVALID_NODE_INDEX;
960 if (j >= vec_len (old_nodes_clone))
962 /* new node, set to zero */
963 clib_memset (&new_n_clone->stats_total, 0,
964 sizeof (new_n_clone->stats_total));
965 clib_memset (&new_n_clone->stats_last_clear, 0,
966 sizeof (new_n_clone->stats_last_clear));
970 vlib_node_t *old_n_clone = old_nodes_clone[j];
971 /* Copy stats if the old data is valid */
972 clib_memcpy_fast (&new_n_clone->stats_total,
973 &old_n_clone->stats_total,
974 sizeof (new_n_clone->stats_total));
975 clib_memcpy_fast (&new_n_clone->stats_last_clear,
976 &old_n_clone->stats_last_clear,
977 sizeof (new_n_clone->stats_last_clear));
979 /* keep previous node state */
980 new_n_clone->state = old_n_clone->state;
981 new_n_clone->flags = old_n_clone->flags;
983 vec_add1 (nm_clone->nodes, new_n_clone);
986 /* Free the old node clones */
987 clib_mem_free (old_nodes_clone[0]);
989 vec_free (old_nodes_clone);
992 /* re-clone internal nodes */
993 old_rt = nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL];
994 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL] =
995 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL],
996 CLIB_CACHE_LINE_BYTES);
998 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL])
1000 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
1001 /* copy runtime_data, will be overwritten later for existing rt */
1002 if (n->runtime_data && n->runtime_data_bytes > 0)
1003 clib_memcpy_fast (rt->runtime_data, n->runtime_data,
1004 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
1005 n->runtime_data_bytes));
1008 for (j = 0; j < vec_len (old_rt); j++)
1010 rt = vlib_node_get_runtime (vm_clone, old_rt[j].node_index);
1011 rt->state = old_rt[j].state;
1012 rt->flags = old_rt[j].flags;
1013 clib_memcpy_fast (rt->runtime_data, old_rt[j].runtime_data,
1014 VLIB_NODE_RUNTIME_DATA_SIZE);
1019 /* re-clone input nodes */
1020 old_rt = nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT];
1021 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT] =
1022 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_INPUT],
1023 CLIB_CACHE_LINE_BYTES);
1024 clib_interrupt_resize (
1025 &nm_clone->interrupts,
1026 vec_len (nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT]));
1028 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT])
1030 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
1031 /* copy runtime_data, will be overwritten later for existing rt */
1032 if (n->runtime_data && n->runtime_data_bytes > 0)
1033 clib_memcpy_fast (rt->runtime_data, n->runtime_data,
1034 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
1035 n->runtime_data_bytes));
1038 for (j = 0; j < vec_len (old_rt); j++)
1040 rt = vlib_node_get_runtime (vm_clone, old_rt[j].node_index);
1041 rt->state = old_rt[j].state;
1042 rt->flags = old_rt[j].flags;
1043 clib_memcpy_fast (rt->runtime_data, old_rt[j].runtime_data,
1044 VLIB_NODE_RUNTIME_DATA_SIZE);
1049 /* re-clone pre-input nodes */
1050 old_rt = nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT];
1051 nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT] =
1052 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT],
1053 CLIB_CACHE_LINE_BYTES);
1055 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT])
1057 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
1058 /* copy runtime_data, will be overwritten later for existing rt */
1059 if (n->runtime_data && n->runtime_data_bytes > 0)
1060 clib_memcpy_fast (rt->runtime_data, n->runtime_data,
1061 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
1062 n->runtime_data_bytes));
1065 for (j = 0; j < vec_len (old_rt); j++)
1067 rt = vlib_node_get_runtime (vm_clone, old_rt[j].node_index);
1068 rt->state = old_rt[j].state;
1069 rt->flags = old_rt[j].flags;
1070 clib_memcpy_fast (rt->runtime_data, old_rt[j].runtime_data,
1071 VLIB_NODE_RUNTIME_DATA_SIZE);
1076 vec_free (nm_clone->processes);
1077 nm_clone->processes = vec_dup_aligned (nm->processes,
1078 CLIB_CACHE_LINE_BYTES);
1079 nm_clone->node_by_error = nm->node_by_error;
1083 vlib_worker_thread_node_runtime_update (void)
1086 * Make a note that we need to do a node runtime update
1087 * prior to releasing the barrier.
1089 vlib_global_main.need_vlib_worker_thread_node_runtime_update = 1;
1093 unformat_sched_policy (unformat_input_t * input, va_list * args)
1095 u32 *r = va_arg (*args, u32 *);
1098 #define _(v,f,s) else if (unformat (input, s)) *r = SCHED_POLICY_##f;
1099 foreach_sched_policy
1106 static clib_error_t *
1107 cpu_config (vlib_main_t * vm, unformat_input_t * input)
1109 vlib_thread_registration_t *tr;
1111 vlib_thread_main_t *tm = &vlib_thread_main;
1116 tm->thread_registrations_by_name = hash_create_string (0, sizeof (uword));
1118 tm->n_thread_stacks = 1; /* account for main thread */
1119 tm->sched_policy = ~0;
1120 tm->sched_priority = ~0;
1121 tm->main_lcore = ~0;
1127 hash_set_mem (tm->thread_registrations_by_name, tr->name, (uword) tr);
1131 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1133 if (unformat (input, "use-pthreads"))
1134 tm->use_pthreads = 1;
1135 else if (unformat (input, "thread-prefix %v", &tm->thread_prefix))
1137 else if (unformat (input, "main-core %u", &tm->main_lcore))
1139 else if (unformat (input, "skip-cores %u", &tm->skip_cores))
1141 else if (unformat (input, "numa-heap-size %U",
1142 unformat_memory_size, &tm->numa_heap_size))
1144 else if (unformat (input, "coremask-%s %U", &name,
1145 unformat_bitmap_mask, &bitmap) ||
1146 unformat (input, "corelist-%s %U", &name,
1147 unformat_bitmap_list, &bitmap))
1149 p = hash_get_mem (tm->thread_registrations_by_name, name);
1151 return clib_error_return (0, "no such thread type '%s'", name);
1153 tr = (vlib_thread_registration_t *) p[0];
1155 if (tr->use_pthreads)
1156 return clib_error_return (0,
1157 "corelist cannot be set for '%s' threads",
1160 return clib_error_return
1161 (0, "core placement of '%s' threads is already configured",
1164 tr->coremask = bitmap;
1165 tr->count = clib_bitmap_count_set_bits (tr->coremask);
1169 (input, "scheduler-policy %U", unformat_sched_policy,
1172 else if (unformat (input, "scheduler-priority %u", &tm->sched_priority))
1174 else if (unformat (input, "%s %u", &name, &count))
1176 p = hash_get_mem (tm->thread_registrations_by_name, name);
1178 return clib_error_return (0, "no such thread type 3 '%s'", name);
1180 tr = (vlib_thread_registration_t *) p[0];
1182 if (tr->fixed_count)
1183 return clib_error_return
1184 (0, "number of '%s' threads not configurable", name);
1186 return clib_error_return
1187 (0, "number of '%s' threads is already configured", name);
1195 if (tm->sched_priority != ~0)
1197 if (tm->sched_policy == SCHED_FIFO || tm->sched_policy == SCHED_RR)
1199 u32 prio_max = sched_get_priority_max (tm->sched_policy);
1200 u32 prio_min = sched_get_priority_min (tm->sched_policy);
1201 if (tm->sched_priority > prio_max)
1202 tm->sched_priority = prio_max;
1203 if (tm->sched_priority < prio_min)
1204 tm->sched_priority = prio_min;
1208 return clib_error_return
1210 "scheduling priority (%d) is not allowed for `normal` scheduling policy",
1211 tm->sched_priority);
1216 if (!tm->thread_prefix)
1217 tm->thread_prefix = format (0, "vpp");
1221 tm->n_thread_stacks += tr->count;
1222 tm->n_pthreads += tr->count * tr->use_pthreads;
1223 tm->n_threads += tr->count * (tr->use_pthreads == 0);
1230 VLIB_EARLY_CONFIG_FUNCTION (cpu_config, "cpu");
1233 * Enforce minimum open time to minimize packet loss due to Rx overflow,
1234 * based on a test based heuristic that barrier should be open for at least
1235 * 3 time as long as it is closed (with an upper bound of 1ms because by that
1236 * point it is probably too late to make a difference)
1239 #ifndef BARRIER_MINIMUM_OPEN_LIMIT
1240 #define BARRIER_MINIMUM_OPEN_LIMIT 0.001
1243 #ifndef BARRIER_MINIMUM_OPEN_FACTOR
1244 #define BARRIER_MINIMUM_OPEN_FACTOR 3
1248 vlib_worker_thread_initial_barrier_sync_and_release (vlib_main_t * vm)
1251 f64 now = vlib_time_now (vm);
1252 u32 count = vlib_get_n_threads () - 1;
1254 /* No worker threads? */
1258 deadline = now + BARRIER_SYNC_TIMEOUT;
1259 *vlib_worker_threads->wait_at_barrier = 1;
1260 while (*vlib_worker_threads->workers_at_barrier != count)
1262 if ((now = vlib_time_now (vm)) > deadline)
1264 fformat (stderr, "%s: worker thread deadlock\n", __FUNCTION__);
1269 *vlib_worker_threads->wait_at_barrier = 0;
1273 * Return true if the wroker thread barrier is held
1276 vlib_worker_thread_barrier_held (void)
1278 if (vlib_get_n_threads () < 2)
1281 return (*vlib_worker_threads->wait_at_barrier == 1);
1285 vlib_worker_thread_barrier_sync_int (vlib_main_t * vm, const char *func_name)
1292 f64 max_vector_rate;
1296 if (vlib_get_n_threads () < 2)
1299 ASSERT (vlib_get_thread_index () == 0);
1301 vlib_worker_threads[0].barrier_caller = func_name;
1302 count = vlib_get_n_threads () - 1;
1304 /* Record entry relative to last close */
1305 now = vlib_time_now (vm);
1306 t_entry = now - vm->barrier_epoch;
1308 /* Tolerate recursive calls */
1309 if (++vlib_worker_threads[0].recursion_level > 1)
1311 barrier_trace_sync_rec (t_entry);
1315 if (PREDICT_FALSE (vec_len (vm->barrier_perf_callbacks) != 0))
1316 clib_call_callbacks (vm->barrier_perf_callbacks, vm,
1317 vm->clib_time.last_cpu_time, 0 /* enter */ );
1320 * Need data to decide if we're working hard enough to honor
1321 * the barrier hold-down timer.
1323 max_vector_rate = 0.0;
1324 for (i = 1; i < vlib_get_n_threads (); i++)
1326 vlib_main_t *ovm = vlib_get_main_by_index (i);
1327 max_vector_rate = clib_max (max_vector_rate,
1328 (f64) vlib_last_vectors_per_main_loop (ovm));
1331 vlib_worker_threads[0].barrier_sync_count++;
1333 /* Enforce minimum barrier open time to minimize packet loss */
1334 ASSERT (vm->barrier_no_close_before <= (now + BARRIER_MINIMUM_OPEN_LIMIT));
1337 * If any worker thread seems busy, which we define
1338 * as a vector rate above 10, we enforce the barrier hold-down timer
1340 if (max_vector_rate > 10.0)
1344 now = vlib_time_now (vm);
1345 /* Barrier hold-down timer expired? */
1346 if (now >= vm->barrier_no_close_before)
1348 if ((vm->barrier_no_close_before - now)
1349 > (2.0 * BARRIER_MINIMUM_OPEN_LIMIT))
1352 ("clock change: would have waited for %.4f seconds",
1353 (vm->barrier_no_close_before - now));
1358 /* Record time of closure */
1359 t_open = now - vm->barrier_epoch;
1360 vm->barrier_epoch = now;
1362 deadline = now + BARRIER_SYNC_TIMEOUT;
1364 *vlib_worker_threads->wait_at_barrier = 1;
1365 while (*vlib_worker_threads->workers_at_barrier != count)
1367 if ((now = vlib_time_now (vm)) > deadline)
1369 fformat (stderr, "%s: worker thread deadlock\n", __FUNCTION__);
1374 t_closed = now - vm->barrier_epoch;
1376 barrier_trace_sync (t_entry, t_open, t_closed);
1381 vlib_worker_thread_barrier_release (vlib_main_t * vm)
1383 vlib_global_main_t *vgm = vlib_get_global_main ();
1389 f64 t_update_main = 0.0;
1390 int refork_needed = 0;
1392 if (vlib_get_n_threads () < 2)
1395 ASSERT (vlib_get_thread_index () == 0);
1398 now = vlib_time_now (vm);
1399 t_entry = now - vm->barrier_epoch;
1401 if (--vlib_worker_threads[0].recursion_level > 0)
1403 barrier_trace_release_rec (t_entry);
1407 /* Update (all) node runtimes before releasing the barrier, if needed */
1408 if (vgm->need_vlib_worker_thread_node_runtime_update)
1411 * Lock stat segment here, so we's safe when
1412 * rebuilding the stat segment node clones from the
1415 vlib_stats_segment_lock ();
1417 /* Do stats elements on main thread */
1418 worker_thread_node_runtime_update_internal ();
1419 vgm->need_vlib_worker_thread_node_runtime_update = 0;
1421 /* Do per thread rebuilds in parallel */
1423 clib_atomic_fetch_add (vlib_worker_threads->node_reforks_required,
1424 (vlib_get_n_threads () - 1));
1425 now = vlib_time_now (vm);
1426 t_update_main = now - vm->barrier_epoch;
1429 deadline = now + BARRIER_SYNC_TIMEOUT;
1432 * Note when we let go of the barrier.
1433 * Workers can use this to derive a reasonably accurate
1434 * time offset. See vlib_time_now(...)
1436 vm->time_last_barrier_release = vlib_time_now (vm);
1437 CLIB_MEMORY_STORE_BARRIER ();
1439 *vlib_worker_threads->wait_at_barrier = 0;
1441 while (*vlib_worker_threads->workers_at_barrier > 0)
1443 if ((now = vlib_time_now (vm)) > deadline)
1445 fformat (stderr, "%s: worker thread deadlock\n", __FUNCTION__);
1450 /* Wait for reforks before continuing */
1453 now = vlib_time_now (vm);
1455 deadline = now + BARRIER_SYNC_TIMEOUT;
1457 while (*vlib_worker_threads->node_reforks_required > 0)
1459 if ((now = vlib_time_now (vm)) > deadline)
1461 fformat (stderr, "%s: worker thread refork deadlock\n",
1466 vlib_stats_segment_unlock ();
1469 t_closed_total = now - vm->barrier_epoch;
1471 minimum_open = t_closed_total * BARRIER_MINIMUM_OPEN_FACTOR;
1473 if (minimum_open > BARRIER_MINIMUM_OPEN_LIMIT)
1475 minimum_open = BARRIER_MINIMUM_OPEN_LIMIT;
1478 vm->barrier_no_close_before = now + minimum_open;
1480 /* Record barrier epoch (used to enforce minimum open time) */
1481 vm->barrier_epoch = now;
1483 barrier_trace_release (t_entry, t_closed_total, t_update_main);
1485 if (PREDICT_FALSE (vec_len (vm->barrier_perf_callbacks) != 0))
1486 clib_call_callbacks (vm->barrier_perf_callbacks, vm,
1487 vm->clib_time.last_cpu_time, 1 /* leave */ );
1491 vlib_worker_sync_rpc (void *args)
1493 ASSERT (vlib_thread_is_main_w_barrier ());
1494 vlib_worker_threads->wait_before_barrier = 0;
1498 vlib_workers_sync (void)
1500 if (PREDICT_FALSE (!vlib_num_workers ()))
1503 if (!(*vlib_worker_threads->wait_at_barrier) &&
1504 !clib_atomic_swap_rel_n (&vlib_worker_threads->wait_before_barrier, 1))
1506 u32 thread_index = vlib_get_thread_index ();
1507 vlib_rpc_call_main_thread (vlib_worker_sync_rpc, (u8 *) &thread_index,
1508 sizeof (thread_index));
1511 /* Wait until main thread asks for barrier */
1512 while (!(*vlib_worker_threads->wait_at_barrier))
1515 /* Stop before barrier and make sure all threads are either
1516 * at worker barrier or the barrier before it */
1517 clib_atomic_fetch_add (&vlib_worker_threads->workers_before_barrier, 1);
1518 while (vlib_num_workers () > (*vlib_worker_threads->workers_at_barrier +
1519 vlib_worker_threads->workers_before_barrier))
1524 vlib_workers_continue (void)
1526 if (PREDICT_FALSE (!vlib_num_workers ()))
1529 clib_atomic_fetch_add (&vlib_worker_threads->done_work_before_barrier, 1);
1531 /* Wait until all workers are done with work before barrier */
1532 while (vlib_worker_threads->done_work_before_barrier <
1533 vlib_worker_threads->workers_before_barrier)
1536 clib_atomic_fetch_add (&vlib_worker_threads->done_work_before_barrier, -1);
1537 clib_atomic_fetch_add (&vlib_worker_threads->workers_before_barrier, -1);
1541 * Wait until each of the workers has been once around the track
1544 vlib_worker_wait_one_loop (void)
1546 vlib_global_main_t *vgm = vlib_get_global_main ();
1547 ASSERT (vlib_get_thread_index () == 0);
1549 if (vlib_get_n_threads () < 2)
1552 if (vlib_worker_thread_barrier_held ())
1558 vec_validate (counts, vlib_get_n_threads () - 1);
1560 /* record the current loop counts */
1561 vec_foreach_index (ii, vgm->vlib_mains)
1562 counts[ii] = vgm->vlib_mains[ii]->main_loop_count;
1564 /* spin until each changes, apart from the main thread, or we'd be
1566 for (ii = 1; ii < vec_len (counts); ii++)
1568 while (counts[ii] == vgm->vlib_mains[ii]->main_loop_count)
1577 vlib_worker_thread_fn (void *arg)
1579 vlib_global_main_t *vgm = vlib_get_global_main ();
1580 vlib_worker_thread_t *w = (vlib_worker_thread_t *) arg;
1581 vlib_main_t *vm = vlib_get_main ();
1584 ASSERT (vm->thread_index == vlib_get_thread_index ());
1586 vlib_worker_thread_init (w);
1587 clib_time_init (&vm->clib_time);
1588 clib_mem_set_heap (w->thread_mheap);
1590 vm->worker_init_functions_called = hash_create (0, 0);
1592 e = vlib_call_init_exit_functions_no_sort (
1593 vm, &vgm->worker_init_function_registrations, 1 /* call_once */,
1596 clib_error_report (e);
1598 vlib_worker_loop (vm);
1602 VLIB_REGISTER_THREAD (worker_thread_reg, static) = {
1605 .function = vlib_worker_thread_fn,
1609 extern clib_march_fn_registration
1610 *vlib_frame_queue_dequeue_with_aux_fn_march_fn_registrations;
1611 extern clib_march_fn_registration
1612 *vlib_frame_queue_dequeue_fn_march_fn_registrations;
1614 vlib_frame_queue_main_init (u32 node_index, u32 frame_queue_nelts)
1616 vlib_thread_main_t *tm = vlib_get_thread_main ();
1617 vlib_main_t *vm = vlib_get_main ();
1618 vlib_frame_queue_main_t *fqm;
1619 vlib_frame_queue_t *fq;
1624 if (frame_queue_nelts == 0)
1625 frame_queue_nelts = FRAME_QUEUE_MAX_NELTS;
1627 num_threads = 1 /* main thread */ + tm->n_threads;
1628 ASSERT (frame_queue_nelts >= 8 + num_threads);
1630 vec_add2 (tm->frame_queue_mains, fqm, 1);
1632 node = vlib_get_node (vm, fqm->node_index);
1634 if (node->aux_offset)
1636 fqm->frame_queue_dequeue_fn =
1637 CLIB_MARCH_FN_VOID_POINTER (vlib_frame_queue_dequeue_with_aux_fn);
1641 fqm->frame_queue_dequeue_fn =
1642 CLIB_MARCH_FN_VOID_POINTER (vlib_frame_queue_dequeue_fn);
1645 fqm->node_index = node_index;
1646 fqm->frame_queue_nelts = frame_queue_nelts;
1648 vec_validate (fqm->vlib_frame_queues, tm->n_vlib_mains - 1);
1649 vec_set_len (fqm->vlib_frame_queues, 0);
1650 for (i = 0; i < tm->n_vlib_mains; i++)
1652 fq = vlib_frame_queue_alloc (frame_queue_nelts);
1653 vec_add1 (fqm->vlib_frame_queues, fq);
1656 return (fqm - tm->frame_queue_mains);
1660 vlib_process_signal_event_mt_helper (vlib_process_signal_event_mt_args_t *
1663 ASSERT (vlib_get_thread_index () == 0);
1664 vlib_process_signal_event (vlib_get_main (), args->node_index,
1665 args->type_opaque, args->data);
1668 void *rpc_call_main_thread_cb_fn;
1671 vlib_rpc_call_main_thread (void *callback, u8 * args, u32 arg_size)
1673 if (rpc_call_main_thread_cb_fn)
1675 void (*fp) (void *, u8 *, u32) = rpc_call_main_thread_cb_fn;
1676 (*fp) (callback, args, arg_size);
1679 clib_warning ("BUG: rpc_call_main_thread_cb_fn NULL!");
1683 threads_init (vlib_main_t * vm)
1685 const vlib_thread_main_t *tm = vlib_get_thread_main ();
1687 if (tm->main_lcore == ~0 && tm->n_vlib_mains > 1)
1688 return clib_error_return (0, "Configuration error, a main core must "
1689 "be specified when using worker threads");
1694 VLIB_INIT_FUNCTION (threads_init);
1696 static clib_error_t *
1697 show_clock_command_fn (vlib_main_t * vm,
1698 unformat_input_t * input, vlib_cli_command_t * cmd)
1701 clib_timebase_t _tb, *tb = &_tb;
1703 (void) unformat (input, "verbose %=", &verbose, 1);
1705 clib_timebase_init (tb, 0 /* GMT */ , CLIB_TIMEBASE_DAYLIGHT_NONE,
1708 vlib_cli_output (vm, "%U, %U GMT", format_clib_time, &vm->clib_time,
1709 verbose, format_clib_timebase_time,
1710 clib_timebase_now (tb));
1712 vlib_cli_output (vm, "Time last barrier release %.9f",
1713 vm->time_last_barrier_release);
1715 foreach_vlib_main ()
1717 vlib_cli_output (vm, "%d: %U", this_vlib_main->thread_index,
1718 format_clib_time, &this_vlib_main->clib_time, verbose);
1720 vlib_cli_output (vm, "Thread %d offset %.9f error %.9f",
1721 this_vlib_main->thread_index,
1722 this_vlib_main->time_offset,
1723 vm->time_last_barrier_release -
1724 this_vlib_main->time_last_barrier_release);
1730 VLIB_CLI_COMMAND (f_command, static) =
1732 .path = "show clock",
1733 .short_help = "show clock",
1734 .function = show_clock_command_fn,
1738 vlib_thread_main_t *
1739 vlib_get_thread_main_not_inline (void)
1741 return vlib_get_thread_main ();
1745 * fd.io coding-style-patch-verification: ON
1748 * eval: (c-set-style "gnu")