2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
19 #include <vppinfra/format.h>
20 #include <vppinfra/time_range.h>
21 #include <vppinfra/interrupt.h>
22 #include <vppinfra/linux/sysfs.h>
23 #include <vppinfra/bitmap.h>
24 #include <vppinfra/unix.h>
25 #include <vlib/vlib.h>
27 #include <vlib/threads.h>
29 #include <vlib/stats/stats.h>
37 vlib_worker_thread_t *vlib_worker_threads;
38 vlib_thread_main_t vlib_thread_main;
41 * Barrier tracing can be enabled on a normal build to collect information
42 * on barrier use, including timings and call stacks. Deliberately not
43 * keyed off CLIB_DEBUG, because that can add significant overhead which
44 * imapacts observed timings.
48 barrier_trace_sync (f64 t_entry, f64 t_open, f64 t_closed)
50 if (!vlib_worker_threads->barrier_elog_enabled)
53 ELOG_TYPE_DECLARE (e) = {
54 .format = "bar-trace-%s-#%d",
55 .format_args = "T4i4",
60 u32 caller, count, t_entry, t_open, t_closed;
63 ed = ELOG_DATA (&vlib_global_main.elog_main, e);
64 ed->count = (int) vlib_worker_threads[0].barrier_sync_count;
65 ed->caller = elog_string (&vlib_global_main.elog_main,
66 (char *) vlib_worker_threads[0].barrier_caller);
67 ed->t_entry = (int) (1000000.0 * t_entry);
68 ed->t_open = (int) (1000000.0 * t_open);
69 ed->t_closed = (int) (1000000.0 * t_closed);
73 barrier_trace_sync_rec (f64 t_entry)
75 if (!vlib_worker_threads->barrier_elog_enabled)
78 ELOG_TYPE_DECLARE (e) = {
79 .format = "bar-syncrec-%s-#%d",
80 .format_args = "T4i4",
88 ed = ELOG_DATA (&vlib_global_main.elog_main, e);
89 ed->depth = (int) vlib_worker_threads[0].recursion_level - 1;
90 ed->caller = elog_string (&vlib_global_main.elog_main,
91 (char *) vlib_worker_threads[0].barrier_caller);
95 barrier_trace_release_rec (f64 t_entry)
97 if (!vlib_worker_threads->barrier_elog_enabled)
100 ELOG_TYPE_DECLARE (e) = {
101 .format = "bar-relrrec-#%d",
110 ed = ELOG_DATA (&vlib_global_main.elog_main, e);
111 ed->depth = (int) vlib_worker_threads[0].recursion_level;
115 barrier_trace_release (f64 t_entry, f64 t_closed_total, f64 t_update_main)
117 if (!vlib_worker_threads->barrier_elog_enabled)
120 ELOG_TYPE_DECLARE (e) = {
121 .format = "bar-rel-#%d-e%d-u%d-t%d",
122 .format_args = "i4i4i4i4",
127 u32 count, t_entry, t_update_main, t_closed_total;
130 ed = ELOG_DATA (&vlib_global_main.elog_main, e);
131 ed->t_entry = (int) (1000000.0 * t_entry);
132 ed->t_update_main = (int) (1000000.0 * t_update_main);
133 ed->t_closed_total = (int) (1000000.0 * t_closed_total);
134 ed->count = (int) vlib_worker_threads[0].barrier_sync_count;
136 /* Reset context for next trace */
137 vlib_worker_threads[0].barrier_context = NULL;
141 os_get_nthreads (void)
143 return vec_len (vlib_thread_stacks);
147 vlib_set_thread_name (char *name)
149 int pthread_setname_np (pthread_t __target_thread, const char *__name);
151 pthread_t thread = pthread_self ();
155 rv = pthread_setname_np (thread, name);
157 clib_warning ("pthread_setname_np returned %d", rv);
162 sort_registrations_by_no_clone (void *a0, void *a1)
164 vlib_thread_registration_t **tr0 = a0;
165 vlib_thread_registration_t **tr1 = a1;
167 return ((i32) ((*tr0)->no_data_structure_clone)
168 - ((i32) ((*tr1)->no_data_structure_clone)));
172 /* Called early in the init sequence */
175 vlib_thread_init (vlib_main_t * vm)
177 vlib_thread_main_t *tm = &vlib_thread_main;
178 vlib_worker_thread_t *w;
179 vlib_thread_registration_t *tr;
180 u32 n_vlib_mains = 1;
184 u32 stats_num_worker_threads_dir_index;
186 stats_num_worker_threads_dir_index =
187 vlib_stats_add_gauge ("/sys/num_worker_threads");
188 ASSERT (stats_num_worker_threads_dir_index != ~0);
190 /* get bitmaps of active cpu cores and sockets */
191 tm->cpu_core_bitmap = os_get_online_cpu_core_bitmap ();
192 tm->cpu_socket_bitmap = os_get_online_cpu_node_bitmap ();
194 avail_cpu = clib_bitmap_dup (tm->cpu_core_bitmap);
197 for (i = 0; i < tm->skip_cores; i++)
199 uword c = clib_bitmap_first_set (avail_cpu);
201 return clib_error_return (0, "no available cpus to skip");
203 avail_cpu = clib_bitmap_set (avail_cpu, c, 0);
206 /* grab cpu for main thread */
207 if (tm->main_lcore != ~0)
209 if (clib_bitmap_get (avail_cpu, tm->main_lcore) == 0)
210 return clib_error_return (0, "cpu %u is not available to be used"
211 " for the main thread", tm->main_lcore);
212 avail_cpu = clib_bitmap_set (avail_cpu, tm->main_lcore, 0);
215 /* assume that there is socket 0 only if there is no data from sysfs */
216 if (!tm->cpu_socket_bitmap)
217 tm->cpu_socket_bitmap = clib_bitmap_set (0, 0, 1);
219 /* pin main thread to main_lcore */
220 if (tm->main_lcore != ~0)
224 CPU_SET (tm->main_lcore, &cpuset);
225 if (pthread_setaffinity_np (pthread_self (), sizeof (cpu_set_t),
228 return clib_error_return (0, "could not pin main thread to cpu %u",
233 /* Set up thread 0 */
234 vec_validate_aligned (vlib_worker_threads, 0, CLIB_CACHE_LINE_BYTES);
235 vec_set_len (vlib_worker_threads, 1);
236 w = vlib_worker_threads;
237 w->thread_mheap = clib_mem_get_heap ();
238 w->thread_stack = vlib_thread_stacks[0];
239 w->cpu_id = tm->main_lcore;
240 w->lwp = syscall (SYS_gettid);
241 w->thread_id = pthread_self ();
242 tm->n_vlib_mains = 1;
244 vlib_get_thread_core_numa (w, w->cpu_id);
246 if (tm->sched_policy != ~0)
248 struct sched_param sched_param;
249 if (!sched_getparam (w->lwp, &sched_param))
251 if (tm->sched_priority != ~0)
252 sched_param.sched_priority = tm->sched_priority;
253 sched_setscheduler (w->lwp, tm->sched_policy, &sched_param);
257 /* assign threads to cores and set n_vlib_mains */
262 vec_add1 (tm->registrations, tr);
266 vec_sort_with_function (tm->registrations, sort_registrations_by_no_clone);
268 for (i = 0; i < vec_len (tm->registrations); i++)
271 tr = tm->registrations[i];
272 tr->first_index = first_index;
273 first_index += tr->count;
274 n_vlib_mains += (tr->no_data_structure_clone == 0) ? tr->count : 0;
276 /* construct coremask */
277 if (tr->use_pthreads || !tr->count)
283 clib_bitmap_foreach (c, tr->coremask) {
284 if (clib_bitmap_get(avail_cpu, c) == 0)
285 return clib_error_return (0, "cpu %u is not available to be used"
286 " for the '%s' thread",c, tr->name);
288 avail_cpu = clib_bitmap_set(avail_cpu, c, 0);
293 for (j = 0; j < tr->count; j++)
295 /* Do not use CPU 0 by default - leave it to the host and IRQs */
296 uword avail_c0 = clib_bitmap_get (avail_cpu, 0);
297 avail_cpu = clib_bitmap_set (avail_cpu, 0, 0);
299 uword c = clib_bitmap_first_set (avail_cpu);
300 /* Use CPU 0 as a last resort */
301 if (c == ~0 && avail_c0)
308 return clib_error_return (0,
309 "no available cpus to be used for"
310 " the '%s' thread #%u",
311 tr->name, tr->count);
313 avail_cpu = clib_bitmap_set (avail_cpu, 0, avail_c0);
314 avail_cpu = clib_bitmap_set (avail_cpu, c, 0);
315 tr->coremask = clib_bitmap_set (tr->coremask, c, 1);
320 clib_bitmap_free (avail_cpu);
322 tm->n_vlib_mains = n_vlib_mains;
323 vlib_stats_set_gauge (stats_num_worker_threads_dir_index, n_vlib_mains - 1);
326 * Allocate the remaining worker threads, and thread stack vector slots
327 * from now on, calls to os_get_nthreads() will return the correct
330 vec_validate_aligned (vlib_worker_threads, first_index - 1,
331 CLIB_CACHE_LINE_BYTES);
332 vec_validate (vlib_thread_stacks, vec_len (vlib_worker_threads) - 1);
337 vlib_frame_queue_alloc (int nelts)
339 vlib_frame_queue_t *fq;
341 fq = clib_mem_alloc_aligned (sizeof (*fq), CLIB_CACHE_LINE_BYTES);
342 clib_memset (fq, 0, sizeof (*fq));
344 fq->vector_threshold = 2 * VLIB_FRAME_SIZE;
345 vec_validate_aligned (fq->elts, nelts - 1, CLIB_CACHE_LINE_BYTES);
347 if (nelts & (nelts - 1))
349 fformat (stderr, "FATAL: nelts MUST be a power of 2\n");
356 void vl_msg_api_handler_no_free (void *) __attribute__ ((weak));
358 vl_msg_api_handler_no_free (void *v)
362 /* To be called by vlib worker threads upon startup */
364 vlib_worker_thread_init (vlib_worker_thread_t * w)
366 vlib_thread_main_t *tm = vlib_get_thread_main ();
369 * Note: disabling signals in worker threads as follows
370 * prevents the api post-mortem dump scheme from working
374 * pthread_sigmask (SIG_SETMASK, &s, 0);
378 clib_mem_set_heap (w->thread_mheap);
380 if (vec_len (tm->thread_prefix) && w->registration->short_name)
382 w->name = format (0, "%v_%s_%d%c", tm->thread_prefix,
383 w->registration->short_name, w->instance_id, '\0');
384 vlib_set_thread_name ((char *) w->name);
387 if (!w->registration->use_pthreads)
390 /* Initial barrier sync, for both worker and i/o threads */
391 clib_atomic_fetch_add (vlib_worker_threads->workers_at_barrier, 1);
393 while (*vlib_worker_threads->wait_at_barrier)
396 clib_atomic_fetch_add (vlib_worker_threads->workers_at_barrier, -1);
401 vlib_worker_thread_bootstrap_fn (void *arg)
403 vlib_worker_thread_t *w = arg;
405 w->lwp = syscall (SYS_gettid);
406 w->thread_id = pthread_self ();
408 __os_thread_index = w - vlib_worker_threads;
412 void *frame_addr = __builtin_frame_address (0);
413 if (frame_addr < (void *) w->thread_stack ||
414 frame_addr > (void *) w->thread_stack + VLIB_THREAD_STACK_SIZE)
416 /* heap is not set yet */
417 fprintf (stderr, "thread stack is not set properly\n");
422 w->thread_function (arg);
428 vlib_get_thread_core_numa (vlib_worker_thread_t * w, unsigned cpu_id)
430 const char *sys_cpu_path = "/sys/devices/system/cpu/cpu";
431 const char *sys_node_path = "/sys/devices/system/node/node";
432 clib_bitmap_t *nbmp = 0, *cbmp = 0;
435 int core_id = -1, numa_id = -1;
437 p = format (p, "%s%u/topology/core_id%c", sys_cpu_path, cpu_id, 0);
438 clib_sysfs_read ((char *) p, "%d", &core_id);
439 vec_reset_length (p);
441 nbmp = os_get_online_cpu_node_bitmap ();
442 clib_bitmap_foreach (node, nbmp) {
443 p = format (p, "%s%u/cpulist%c", sys_node_path, node, 0);
444 clib_sysfs_read ((char *) p, "%U", unformat_bitmap_list, &cbmp);
445 if (clib_bitmap_get (cbmp, cpu_id))
447 vec_reset_length (cbmp);
448 vec_reset_length (p);
455 w->core_id = core_id;
456 w->numa_id = numa_id;
459 static clib_error_t *
460 vlib_launch_thread_int (void *fp, vlib_worker_thread_t * w, unsigned cpu_id)
462 clib_mem_main_t *mm = &clib_mem_main;
463 vlib_thread_main_t *tm = &vlib_thread_main;
467 void *(*fp_arg) (void *) = fp;
471 vlib_get_thread_core_numa (w, cpu_id);
473 /* Set up NUMA-bound heap if indicated */
474 if (mm->per_numa_mheaps[w->numa_id] == 0)
476 /* If the user requested a NUMA heap, create it... */
477 if (tm->numa_heap_size)
479 clib_mem_set_numa_affinity (w->numa_id, 1 /* force */ );
480 numa_heap = clib_mem_create_heap (0 /* DIY */ , tm->numa_heap_size,
482 "numa %u heap", w->numa_id);
483 clib_mem_set_default_numa_affinity ();
484 mm->per_numa_mheaps[w->numa_id] = numa_heap;
488 /* Or, use the main heap */
489 mm->per_numa_mheaps[w->numa_id] = w->thread_mheap;
494 CPU_SET (cpu_id, &cpuset);
496 if (pthread_attr_init (&attr))
497 return clib_error_return_unix (0, "pthread_attr_init");
499 if (pthread_attr_setstack (&attr, w->thread_stack,
500 VLIB_THREAD_STACK_SIZE))
501 return clib_error_return_unix (0, "pthread_attr_setstack");
503 if (pthread_create (&worker, &attr, fp_arg, (void *) w))
504 return clib_error_return_unix (0, "pthread_create");
506 if (pthread_setaffinity_np (worker, sizeof (cpu_set_t), &cpuset))
507 return clib_error_return_unix (0, "pthread_setaffinity_np");
509 if (pthread_attr_destroy (&attr))
510 return clib_error_return_unix (0, "pthread_attr_destroy");
515 static clib_error_t *
516 start_workers (vlib_main_t * vm)
518 vlib_global_main_t *vgm = vlib_get_global_main ();
519 vlib_main_t *fvm = vlib_get_first_main ();
521 vlib_worker_thread_t *w;
522 vlib_main_t *vm_clone;
524 vlib_thread_main_t *tm = &vlib_thread_main;
525 vlib_thread_registration_t *tr;
526 vlib_node_runtime_t *rt;
527 u32 n_vlib_mains = tm->n_vlib_mains;
528 u32 worker_thread_index;
529 u32 stats_err_entry_index = fvm->error_main.stats_err_entry_index;
530 clib_mem_heap_t *main_heap = clib_mem_get_per_cpu_heap ();
531 vlib_stats_register_mem_heap (main_heap);
533 vec_reset_length (vlib_worker_threads);
535 /* Set up the main thread */
536 vec_add2_aligned (vlib_worker_threads, w, 1, CLIB_CACHE_LINE_BYTES);
537 w->elog_track.name = "main thread";
538 elog_track_register (vlib_get_elog_main (), &w->elog_track);
540 if (vec_len (tm->thread_prefix))
542 w->name = format (0, "%v_main%c", tm->thread_prefix, '\0');
543 vlib_set_thread_name ((char *) w->name);
546 vgm->elog_main.lock =
547 clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES, CLIB_CACHE_LINE_BYTES);
548 vgm->elog_main.lock[0] = 0;
550 clib_callback_data_init (&vm->vlib_node_runtime_perf_callbacks,
551 &vm->worker_thread_main_loop_callback_lock);
553 vec_validate_aligned (vgm->vlib_mains, n_vlib_mains - 1,
554 CLIB_CACHE_LINE_BYTES);
555 vec_set_len (vgm->vlib_mains, 0);
556 vec_add1_aligned (vgm->vlib_mains, vm, CLIB_CACHE_LINE_BYTES);
558 if (n_vlib_mains > 1)
560 vlib_worker_threads->wait_at_barrier =
561 clib_mem_alloc_aligned (sizeof (u32), CLIB_CACHE_LINE_BYTES);
562 vlib_worker_threads->workers_at_barrier =
563 clib_mem_alloc_aligned (sizeof (u32), CLIB_CACHE_LINE_BYTES);
565 vlib_worker_threads->node_reforks_required =
566 clib_mem_alloc_aligned (sizeof (u32), CLIB_CACHE_LINE_BYTES);
568 /* We'll need the rpc vector lock... */
569 clib_spinlock_init (&vm->pending_rpc_lock);
571 /* Ask for an initial barrier sync */
572 *vlib_worker_threads->workers_at_barrier = 0;
573 *vlib_worker_threads->wait_at_barrier = 1;
575 /* Without update or refork */
576 *vlib_worker_threads->node_reforks_required = 0;
577 vgm->need_vlib_worker_thread_node_runtime_update = 0;
580 vm->barrier_epoch = 0;
581 vm->barrier_no_close_before = 0;
583 worker_thread_index = 1;
584 clib_spinlock_init (&vm->worker_thread_main_loop_callback_lock);
586 for (i = 0; i < vec_len (tm->registrations); i++)
588 vlib_node_main_t *nm, *nm_clone;
591 tr = tm->registrations[i];
596 for (k = 0; k < tr->count; k++)
601 vec_add2 (vlib_worker_threads, w, 1);
602 /* Currently unused, may not really work */
604 w->thread_mheap = clib_mem_create_heap (0, tr->mheap_size,
609 w->thread_mheap = main_heap;
612 vlib_thread_stack_init (w - vlib_worker_threads);
613 w->thread_function = tr->function;
614 w->thread_function_arg = w;
616 w->registration = tr;
619 (char *) format (0, "%s %d", tr->name, k + 1);
620 vec_add1 (w->elog_track.name, 0);
621 elog_track_register (vlib_get_elog_main (), &w->elog_track);
623 if (tr->no_data_structure_clone)
626 /* Fork vlib_global_main et al. Look for bugs here */
627 oldheap = clib_mem_set_heap (w->thread_mheap);
629 vm_clone = clib_mem_alloc_aligned (sizeof (*vm_clone),
630 CLIB_CACHE_LINE_BYTES);
631 clib_memcpy (vm_clone, vlib_get_first_main (),
634 vm_clone->thread_index = worker_thread_index;
635 vm_clone->pending_rpc_requests = 0;
636 vec_validate (vm_clone->pending_rpc_requests, 0);
637 vec_set_len (vm_clone->pending_rpc_requests, 0);
638 clib_memset (&vm_clone->random_buffer, 0,
639 sizeof (vm_clone->random_buffer));
641 (&vm_clone->worker_thread_main_loop_callback_lock);
642 clib_callback_data_init
643 (&vm_clone->vlib_node_runtime_perf_callbacks,
644 &vm_clone->worker_thread_main_loop_callback_lock);
646 nm = &vlib_get_first_main ()->node_main;
647 nm_clone = &vm_clone->node_main;
648 /* fork next frames array, preserving node runtime indices */
649 nm_clone->next_frames = vec_dup_aligned (nm->next_frames,
650 CLIB_CACHE_LINE_BYTES);
651 for (j = 0; j < vec_len (nm_clone->next_frames); j++)
653 vlib_next_frame_t *nf = &nm_clone->next_frames[j];
654 u32 save_node_runtime_index;
657 save_node_runtime_index = nf->node_runtime_index;
658 save_flags = nf->flags & VLIB_FRAME_NO_FREE_AFTER_DISPATCH;
659 vlib_next_frame_init (nf);
660 nf->node_runtime_index = save_node_runtime_index;
661 nf->flags = save_flags;
664 /* fork the frame dispatch queue */
665 nm_clone->pending_frames = 0;
666 vec_validate (nm_clone->pending_frames, 10);
667 vec_set_len (nm_clone->pending_frames, 0);
672 /* Allocate all nodes in single block for speed */
673 n = clib_mem_alloc_no_fail (vec_len (nm->nodes) * sizeof (*n));
675 for (j = 0; j < vec_len (nm->nodes); j++)
677 clib_memcpy (n, nm->nodes[j], sizeof (*n));
678 /* none of the copied nodes have enqueue rights given out */
679 n->owner_node_index = VLIB_INVALID_NODE_INDEX;
680 clib_memset (&n->stats_total, 0, sizeof (n->stats_total));
681 clib_memset (&n->stats_last_clear, 0,
682 sizeof (n->stats_last_clear));
683 vec_add1 (nm_clone->nodes, n);
686 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL] =
687 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL],
688 CLIB_CACHE_LINE_BYTES);
690 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL])
692 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
693 /* copy initial runtime_data from node */
694 if (n->runtime_data && n->runtime_data_bytes > 0)
695 clib_memcpy (rt->runtime_data, n->runtime_data,
696 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
697 n->runtime_data_bytes));
700 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT] =
701 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_INPUT],
702 CLIB_CACHE_LINE_BYTES);
703 clib_interrupt_init (
704 &nm_clone->input_node_interrupts,
705 vec_len (nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT]));
706 clib_interrupt_init (
707 &nm_clone->pre_input_node_interrupts,
708 vec_len (nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT]));
709 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT])
711 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
712 /* copy initial runtime_data from node */
713 if (n->runtime_data && n->runtime_data_bytes > 0)
714 clib_memcpy (rt->runtime_data, n->runtime_data,
715 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
716 n->runtime_data_bytes));
719 nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT] =
720 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT],
721 CLIB_CACHE_LINE_BYTES);
723 nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT])
725 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
726 /* copy initial runtime_data from node */
727 if (n->runtime_data && n->runtime_data_bytes > 0)
728 clib_memcpy (rt->runtime_data, n->runtime_data,
729 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
730 n->runtime_data_bytes));
733 nm_clone->processes = vec_dup_aligned (nm->processes,
734 CLIB_CACHE_LINE_BYTES);
736 /* Create per-thread frame freelist */
737 nm_clone->frame_sizes = 0;
738 nm_clone->node_by_error = nm->node_by_error;
740 /* Packet trace buffers are guaranteed to be empty, nothing to do here */
742 clib_mem_set_heap (oldheap);
743 vec_add1_aligned (vgm->vlib_mains, vm_clone,
744 CLIB_CACHE_LINE_BYTES);
746 /* Switch to the stats segment ... */
747 vlib_stats_validate (stats_err_entry_index, worker_thread_index,
748 vec_len (fvm->error_main.counters) - 1);
749 c = vlib_stats_get_entry_data_pointer (stats_err_entry_index);
750 vm_clone->error_main.counters = c[worker_thread_index];
752 vm_clone->error_main.counters_last_clear = vec_dup_aligned (
753 vlib_get_first_main ()->error_main.counters_last_clear,
754 CLIB_CACHE_LINE_BYTES);
756 worker_thread_index++;
762 /* only have non-data-structure copy threads to create... */
763 for (i = 0; i < vec_len (tm->registrations); i++)
765 tr = tm->registrations[i];
767 for (j = 0; j < tr->count; j++)
769 vec_add2 (vlib_worker_threads, w, 1);
772 w->thread_mheap = clib_mem_create_heap (0, tr->mheap_size,
778 w->thread_mheap = main_heap;
780 vlib_thread_stack_init (w - vlib_worker_threads);
781 w->thread_function = tr->function;
782 w->thread_function_arg = w;
785 (char *) format (0, "%s %d", tr->name, j + 1);
786 w->registration = tr;
787 vec_add1 (w->elog_track.name, 0);
788 elog_track_register (vlib_get_elog_main (), &w->elog_track);
793 worker_thread_index = 1;
795 for (i = 0; i < vec_len (tm->registrations); i++)
800 tr = tm->registrations[i];
802 if (tr->use_pthreads || tm->use_pthreads)
804 for (j = 0; j < tr->count; j++)
807 w = vlib_worker_threads + worker_thread_index++;
808 err = vlib_launch_thread_int (vlib_worker_thread_bootstrap_fn,
811 clib_unix_error ("%U, thread %s init on cpu %d failed",
812 format_clib_error, err, tr->name, 0);
818 clib_bitmap_foreach (c, tr->coremask) {
819 w = vlib_worker_threads + worker_thread_index++;
820 err = vlib_launch_thread_int (vlib_worker_thread_bootstrap_fn,
823 clib_unix_error ("%U, thread %s init on cpu %d failed",
824 format_clib_error, err, tr->name, c);
828 vlib_worker_thread_barrier_sync (vm);
831 err = vlib_call_init_exit_functions (
832 vm, &vgm->num_workers_change_function_registrations, 1 /* call_once */,
835 clib_error_report (err);
837 vlib_worker_thread_barrier_release (vm);
841 VLIB_MAIN_LOOP_ENTER_FUNCTION (start_workers);
845 worker_thread_node_runtime_update_internal (void)
849 vlib_node_main_t *nm, *nm_clone;
850 vlib_main_t *vm_clone;
851 vlib_node_runtime_t *rt;
853 ASSERT (vlib_get_thread_index () == 0);
855 vm = vlib_get_first_main ();
858 ASSERT (*vlib_worker_threads->wait_at_barrier == 1);
861 * Scrape all runtime stats, so we don't lose node runtime(s) with
862 * pending counts, or throw away worker / io thread counts.
864 for (j = 0; j < vec_len (nm->nodes); j++)
868 vlib_node_sync_stats (vm, n);
871 for (i = 1; i < vlib_get_n_threads (); i++)
875 vm_clone = vlib_get_main_by_index (i);
876 nm_clone = &vm_clone->node_main;
878 for (j = 0; j < vec_len (nm_clone->nodes); j++)
880 n = nm_clone->nodes[j];
882 rt = vlib_node_get_runtime (vm_clone, n->index);
883 vlib_node_runtime_sync_stats (vm_clone, rt, 0, 0, 0);
887 /* Per-worker clone rebuilds are now done on each thread */
892 vlib_worker_thread_node_refork (void)
894 vlib_main_t *vm, *vm_clone;
895 vlib_node_main_t *nm, *nm_clone;
896 vlib_node_t **old_nodes_clone;
897 vlib_node_runtime_t *rt, *old_rt;
900 vlib_node_t *new_n_clone;
904 vm = vlib_get_first_main ();
906 vm_clone = vlib_get_main ();
907 nm_clone = &vm_clone->node_main;
909 /* Re-clone error heap */
910 u64 *old_counters_all_clear = vm_clone->error_main.counters_last_clear;
912 clib_memcpy_fast (&vm_clone->error_main, &vm->error_main,
913 sizeof (vm->error_main));
914 j = vec_len (vm->error_main.counters) - 1;
916 c = vlib_stats_get_entry_data_pointer (vm->error_main.stats_err_entry_index);
917 vm_clone->error_main.counters = c[vm_clone->thread_index];
919 vec_validate_aligned (old_counters_all_clear, j, CLIB_CACHE_LINE_BYTES);
920 vm_clone->error_main.counters_last_clear = old_counters_all_clear;
922 for (j = 0; j < vec_len (nm_clone->next_frames); j++)
924 vlib_next_frame_t *nf = &nm_clone->next_frames[j];
925 if ((nf->flags & VLIB_FRAME_IS_ALLOCATED) && nf->frame != NULL)
927 vlib_frame_t *f = nf->frame;
929 vlib_frame_free (vm_clone, f);
933 vec_free (nm_clone->next_frames);
934 nm_clone->next_frames = vec_dup_aligned (nm->next_frames,
935 CLIB_CACHE_LINE_BYTES);
937 for (j = 0; j < vec_len (nm_clone->next_frames); j++)
939 vlib_next_frame_t *nf = &nm_clone->next_frames[j];
940 u32 save_node_runtime_index;
943 save_node_runtime_index = nf->node_runtime_index;
944 save_flags = nf->flags & VLIB_FRAME_NO_FREE_AFTER_DISPATCH;
945 vlib_next_frame_init (nf);
946 nf->node_runtime_index = save_node_runtime_index;
947 nf->flags = save_flags;
950 old_nodes_clone = nm_clone->nodes;
955 /* Allocate all nodes in single block for speed */
957 clib_mem_alloc_no_fail (vec_len (nm->nodes) * sizeof (*new_n_clone));
958 for (j = 0; j < vec_len (nm->nodes); j++)
960 vlib_node_t *new_n = nm->nodes[j];
962 clib_memcpy_fast (new_n_clone, new_n, sizeof (*new_n));
963 /* none of the copied nodes have enqueue rights given out */
964 new_n_clone->owner_node_index = VLIB_INVALID_NODE_INDEX;
966 if (j >= vec_len (old_nodes_clone))
968 /* new node, set to zero */
969 clib_memset (&new_n_clone->stats_total, 0,
970 sizeof (new_n_clone->stats_total));
971 clib_memset (&new_n_clone->stats_last_clear, 0,
972 sizeof (new_n_clone->stats_last_clear));
976 vlib_node_t *old_n_clone = old_nodes_clone[j];
977 /* Copy stats if the old data is valid */
978 clib_memcpy_fast (&new_n_clone->stats_total,
979 &old_n_clone->stats_total,
980 sizeof (new_n_clone->stats_total));
981 clib_memcpy_fast (&new_n_clone->stats_last_clear,
982 &old_n_clone->stats_last_clear,
983 sizeof (new_n_clone->stats_last_clear));
985 /* keep previous node state */
986 new_n_clone->state = old_n_clone->state;
987 new_n_clone->flags = old_n_clone->flags;
989 vec_add1 (nm_clone->nodes, new_n_clone);
992 /* Free the old node clones */
993 clib_mem_free (old_nodes_clone[0]);
995 vec_free (old_nodes_clone);
998 /* re-clone internal nodes */
999 old_rt = nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL];
1000 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL] =
1001 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL],
1002 CLIB_CACHE_LINE_BYTES);
1004 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL])
1006 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
1007 /* copy runtime_data, will be overwritten later for existing rt */
1008 if (n->runtime_data && n->runtime_data_bytes > 0)
1009 clib_memcpy_fast (rt->runtime_data, n->runtime_data,
1010 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
1011 n->runtime_data_bytes));
1014 for (j = 0; j < vec_len (old_rt); j++)
1016 rt = vlib_node_get_runtime (vm_clone, old_rt[j].node_index);
1017 rt->state = old_rt[j].state;
1018 rt->flags = old_rt[j].flags;
1019 clib_memcpy_fast (rt->runtime_data, old_rt[j].runtime_data,
1020 VLIB_NODE_RUNTIME_DATA_SIZE);
1025 /* re-clone input nodes */
1026 old_rt = nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT];
1027 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT] =
1028 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_INPUT],
1029 CLIB_CACHE_LINE_BYTES);
1030 clib_interrupt_resize (
1031 &nm_clone->input_node_interrupts,
1032 vec_len (nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT]));
1033 clib_interrupt_resize (
1034 &nm_clone->pre_input_node_interrupts,
1035 vec_len (nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT]));
1037 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT])
1039 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
1040 /* copy runtime_data, will be overwritten later for existing rt */
1041 if (n->runtime_data && n->runtime_data_bytes > 0)
1042 clib_memcpy_fast (rt->runtime_data, n->runtime_data,
1043 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
1044 n->runtime_data_bytes));
1047 for (j = 0; j < vec_len (old_rt); j++)
1049 rt = vlib_node_get_runtime (vm_clone, old_rt[j].node_index);
1050 rt->state = old_rt[j].state;
1051 rt->flags = old_rt[j].flags;
1052 clib_memcpy_fast (rt->runtime_data, old_rt[j].runtime_data,
1053 VLIB_NODE_RUNTIME_DATA_SIZE);
1058 /* re-clone pre-input nodes */
1059 old_rt = nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT];
1060 nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT] =
1061 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT],
1062 CLIB_CACHE_LINE_BYTES);
1064 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT])
1066 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
1067 /* copy runtime_data, will be overwritten later for existing rt */
1068 if (n->runtime_data && n->runtime_data_bytes > 0)
1069 clib_memcpy_fast (rt->runtime_data, n->runtime_data,
1070 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
1071 n->runtime_data_bytes));
1074 for (j = 0; j < vec_len (old_rt); j++)
1076 rt = vlib_node_get_runtime (vm_clone, old_rt[j].node_index);
1077 rt->state = old_rt[j].state;
1078 rt->flags = old_rt[j].flags;
1079 clib_memcpy_fast (rt->runtime_data, old_rt[j].runtime_data,
1080 VLIB_NODE_RUNTIME_DATA_SIZE);
1085 vec_free (nm_clone->processes);
1086 nm_clone->processes = vec_dup_aligned (nm->processes,
1087 CLIB_CACHE_LINE_BYTES);
1088 nm_clone->node_by_error = nm->node_by_error;
1092 vlib_worker_thread_node_runtime_update (void)
1095 * Make a note that we need to do a node runtime update
1096 * prior to releasing the barrier.
1098 vlib_global_main.need_vlib_worker_thread_node_runtime_update = 1;
1102 unformat_sched_policy (unformat_input_t * input, va_list * args)
1104 u32 *r = va_arg (*args, u32 *);
1107 #define _(v,f,s) else if (unformat (input, s)) *r = SCHED_POLICY_##f;
1108 foreach_sched_policy
1115 static clib_error_t *
1116 cpu_config (vlib_main_t * vm, unformat_input_t * input)
1118 vlib_thread_registration_t *tr;
1120 vlib_thread_main_t *tm = &vlib_thread_main;
1125 tm->thread_registrations_by_name = hash_create_string (0, sizeof (uword));
1127 tm->n_thread_stacks = 1; /* account for main thread */
1128 tm->sched_policy = ~0;
1129 tm->sched_priority = ~0;
1130 tm->main_lcore = ~0;
1136 hash_set_mem (tm->thread_registrations_by_name, tr->name, (uword) tr);
1140 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1142 if (unformat (input, "use-pthreads"))
1143 tm->use_pthreads = 1;
1144 else if (unformat (input, "thread-prefix %v", &tm->thread_prefix))
1146 else if (unformat (input, "main-core %u", &tm->main_lcore))
1148 else if (unformat (input, "skip-cores %u", &tm->skip_cores))
1150 else if (unformat (input, "numa-heap-size %U",
1151 unformat_memory_size, &tm->numa_heap_size))
1153 else if (unformat (input, "coremask-%s %U", &name,
1154 unformat_bitmap_mask, &bitmap) ||
1155 unformat (input, "corelist-%s %U", &name,
1156 unformat_bitmap_list, &bitmap))
1158 p = hash_get_mem (tm->thread_registrations_by_name, name);
1160 return clib_error_return (0, "no such thread type '%s'", name);
1162 tr = (vlib_thread_registration_t *) p[0];
1164 if (tr->use_pthreads)
1165 return clib_error_return (0,
1166 "corelist cannot be set for '%s' threads",
1169 return clib_error_return
1170 (0, "core placement of '%s' threads is already configured",
1173 tr->coremask = bitmap;
1174 tr->count = clib_bitmap_count_set_bits (tr->coremask);
1178 (input, "scheduler-policy %U", unformat_sched_policy,
1181 else if (unformat (input, "scheduler-priority %u", &tm->sched_priority))
1183 else if (unformat (input, "%s %u", &name, &count))
1185 p = hash_get_mem (tm->thread_registrations_by_name, name);
1187 return clib_error_return (0, "no such thread type 3 '%s'", name);
1189 tr = (vlib_thread_registration_t *) p[0];
1191 if (tr->fixed_count)
1192 return clib_error_return
1193 (0, "number of '%s' threads not configurable", name);
1195 return clib_error_return
1196 (0, "number of '%s' threads is already configured", name);
1204 if (tm->sched_priority != ~0)
1206 if (tm->sched_policy == SCHED_FIFO || tm->sched_policy == SCHED_RR)
1208 u32 prio_max = sched_get_priority_max (tm->sched_policy);
1209 u32 prio_min = sched_get_priority_min (tm->sched_policy);
1210 if (tm->sched_priority > prio_max)
1211 tm->sched_priority = prio_max;
1212 if (tm->sched_priority < prio_min)
1213 tm->sched_priority = prio_min;
1217 return clib_error_return
1219 "scheduling priority (%d) is not allowed for `normal` scheduling policy",
1220 tm->sched_priority);
1225 if (!tm->thread_prefix)
1226 tm->thread_prefix = format (0, "vpp");
1230 tm->n_thread_stacks += tr->count;
1231 tm->n_pthreads += tr->count * tr->use_pthreads;
1232 tm->n_threads += tr->count * (tr->use_pthreads == 0);
1239 VLIB_EARLY_CONFIG_FUNCTION (cpu_config, "cpu");
1242 * Enforce minimum open time to minimize packet loss due to Rx overflow,
1243 * based on a test based heuristic that barrier should be open for at least
1244 * 3 time as long as it is closed (with an upper bound of 1ms because by that
1245 * point it is probably too late to make a difference)
1248 #ifndef BARRIER_MINIMUM_OPEN_LIMIT
1249 #define BARRIER_MINIMUM_OPEN_LIMIT 0.001
1252 #ifndef BARRIER_MINIMUM_OPEN_FACTOR
1253 #define BARRIER_MINIMUM_OPEN_FACTOR 3
1257 vlib_worker_thread_initial_barrier_sync_and_release (vlib_main_t * vm)
1260 f64 now = vlib_time_now (vm);
1261 u32 count = vlib_get_n_threads () - 1;
1263 /* No worker threads? */
1267 deadline = now + BARRIER_SYNC_TIMEOUT;
1268 *vlib_worker_threads->wait_at_barrier = 1;
1269 while (*vlib_worker_threads->workers_at_barrier != count)
1271 if ((now = vlib_time_now (vm)) > deadline)
1273 fformat (stderr, "%s: worker thread deadlock\n", __FUNCTION__);
1278 *vlib_worker_threads->wait_at_barrier = 0;
1282 * Return true if the wroker thread barrier is held
1285 vlib_worker_thread_barrier_held (void)
1287 if (vlib_get_n_threads () < 2)
1290 return (*vlib_worker_threads->wait_at_barrier == 1);
1294 vlib_worker_thread_barrier_sync_int (vlib_main_t * vm, const char *func_name)
1301 f64 max_vector_rate;
1305 if (vlib_get_n_threads () < 2)
1308 ASSERT (vlib_get_thread_index () == 0);
1310 vlib_worker_threads[0].barrier_caller = func_name;
1311 count = vlib_get_n_threads () - 1;
1313 /* Record entry relative to last close */
1314 now = vlib_time_now (vm);
1315 t_entry = now - vm->barrier_epoch;
1317 /* Tolerate recursive calls */
1318 if (++vlib_worker_threads[0].recursion_level > 1)
1320 barrier_trace_sync_rec (t_entry);
1324 if (PREDICT_FALSE (vec_len (vm->barrier_perf_callbacks) != 0))
1325 clib_call_callbacks (vm->barrier_perf_callbacks, vm,
1326 vm->clib_time.last_cpu_time, 0 /* enter */ );
1329 * Need data to decide if we're working hard enough to honor
1330 * the barrier hold-down timer.
1332 max_vector_rate = 0.0;
1333 for (i = 1; i < vlib_get_n_threads (); i++)
1335 vlib_main_t *ovm = vlib_get_main_by_index (i);
1336 max_vector_rate = clib_max (max_vector_rate,
1337 (f64) vlib_last_vectors_per_main_loop (ovm));
1340 vlib_worker_threads[0].barrier_sync_count++;
1342 /* Enforce minimum barrier open time to minimize packet loss */
1343 ASSERT (vm->barrier_no_close_before <= (now + BARRIER_MINIMUM_OPEN_LIMIT));
1346 * If any worker thread seems busy, which we define
1347 * as a vector rate above 10, we enforce the barrier hold-down timer
1349 if (max_vector_rate > 10.0)
1353 now = vlib_time_now (vm);
1354 /* Barrier hold-down timer expired? */
1355 if (now >= vm->barrier_no_close_before)
1357 if ((vm->barrier_no_close_before - now)
1358 > (2.0 * BARRIER_MINIMUM_OPEN_LIMIT))
1361 ("clock change: would have waited for %.4f seconds",
1362 (vm->barrier_no_close_before - now));
1367 /* Record time of closure */
1368 t_open = now - vm->barrier_epoch;
1369 vm->barrier_epoch = now;
1371 deadline = now + BARRIER_SYNC_TIMEOUT;
1373 *vlib_worker_threads->wait_at_barrier = 1;
1374 while (*vlib_worker_threads->workers_at_barrier != count)
1376 if ((now = vlib_time_now (vm)) > deadline)
1378 fformat (stderr, "%s: worker thread deadlock\n", __FUNCTION__);
1383 t_closed = now - vm->barrier_epoch;
1385 barrier_trace_sync (t_entry, t_open, t_closed);
1390 vlib_worker_thread_barrier_release (vlib_main_t * vm)
1392 vlib_global_main_t *vgm = vlib_get_global_main ();
1398 f64 t_update_main = 0.0;
1399 int refork_needed = 0;
1401 if (vlib_get_n_threads () < 2)
1404 ASSERT (vlib_get_thread_index () == 0);
1407 now = vlib_time_now (vm);
1408 t_entry = now - vm->barrier_epoch;
1410 if (--vlib_worker_threads[0].recursion_level > 0)
1412 barrier_trace_release_rec (t_entry);
1416 /* Update (all) node runtimes before releasing the barrier, if needed */
1417 if (vgm->need_vlib_worker_thread_node_runtime_update)
1420 * Lock stat segment here, so we's safe when
1421 * rebuilding the stat segment node clones from the
1424 vlib_stats_segment_lock ();
1426 /* Do stats elements on main thread */
1427 worker_thread_node_runtime_update_internal ();
1428 vgm->need_vlib_worker_thread_node_runtime_update = 0;
1430 /* Do per thread rebuilds in parallel */
1432 clib_atomic_fetch_add (vlib_worker_threads->node_reforks_required,
1433 (vlib_get_n_threads () - 1));
1434 now = vlib_time_now (vm);
1435 t_update_main = now - vm->barrier_epoch;
1438 deadline = now + BARRIER_SYNC_TIMEOUT;
1441 * Note when we let go of the barrier.
1442 * Workers can use this to derive a reasonably accurate
1443 * time offset. See vlib_time_now(...)
1445 vm->time_last_barrier_release = vlib_time_now (vm);
1446 CLIB_MEMORY_STORE_BARRIER ();
1448 *vlib_worker_threads->wait_at_barrier = 0;
1450 while (*vlib_worker_threads->workers_at_barrier > 0)
1452 if ((now = vlib_time_now (vm)) > deadline)
1454 fformat (stderr, "%s: worker thread deadlock\n", __FUNCTION__);
1459 /* Wait for reforks before continuing */
1462 now = vlib_time_now (vm);
1464 deadline = now + BARRIER_SYNC_TIMEOUT;
1466 while (*vlib_worker_threads->node_reforks_required > 0)
1468 if ((now = vlib_time_now (vm)) > deadline)
1470 fformat (stderr, "%s: worker thread refork deadlock\n",
1475 vlib_stats_segment_unlock ();
1478 t_closed_total = now - vm->barrier_epoch;
1480 minimum_open = t_closed_total * BARRIER_MINIMUM_OPEN_FACTOR;
1482 if (minimum_open > BARRIER_MINIMUM_OPEN_LIMIT)
1484 minimum_open = BARRIER_MINIMUM_OPEN_LIMIT;
1487 vm->barrier_no_close_before = now + minimum_open;
1489 /* Record barrier epoch (used to enforce minimum open time) */
1490 vm->barrier_epoch = now;
1492 barrier_trace_release (t_entry, t_closed_total, t_update_main);
1494 if (PREDICT_FALSE (vec_len (vm->barrier_perf_callbacks) != 0))
1495 clib_call_callbacks (vm->barrier_perf_callbacks, vm,
1496 vm->clib_time.last_cpu_time, 1 /* leave */ );
1500 vlib_worker_sync_rpc (void *args)
1502 ASSERT (vlib_thread_is_main_w_barrier ());
1503 vlib_worker_threads->wait_before_barrier = 0;
1507 vlib_workers_sync (void)
1509 if (PREDICT_FALSE (!vlib_num_workers ()))
1512 if (!(*vlib_worker_threads->wait_at_barrier) &&
1513 !clib_atomic_swap_rel_n (&vlib_worker_threads->wait_before_barrier, 1))
1515 u32 thread_index = vlib_get_thread_index ();
1516 vlib_rpc_call_main_thread (vlib_worker_sync_rpc, (u8 *) &thread_index,
1517 sizeof (thread_index));
1518 vlib_worker_flush_pending_rpc_requests (vlib_get_main ());
1521 /* Wait until main thread asks for barrier */
1522 while (!(*vlib_worker_threads->wait_at_barrier))
1525 /* Stop before barrier and make sure all threads are either
1526 * at worker barrier or the barrier before it */
1527 clib_atomic_fetch_add (&vlib_worker_threads->workers_before_barrier, 1);
1528 while (vlib_num_workers () > (*vlib_worker_threads->workers_at_barrier +
1529 vlib_worker_threads->workers_before_barrier))
1534 vlib_workers_continue (void)
1536 if (PREDICT_FALSE (!vlib_num_workers ()))
1539 clib_atomic_fetch_add (&vlib_worker_threads->done_work_before_barrier, 1);
1541 /* Wait until all workers are done with work before barrier */
1542 while (vlib_worker_threads->done_work_before_barrier <
1543 vlib_worker_threads->workers_before_barrier)
1546 clib_atomic_fetch_add (&vlib_worker_threads->done_work_before_barrier, -1);
1547 clib_atomic_fetch_add (&vlib_worker_threads->workers_before_barrier, -1);
1551 * Wait until each of the workers has been once around the track
1554 vlib_worker_wait_one_loop (void)
1556 vlib_global_main_t *vgm = vlib_get_global_main ();
1557 ASSERT (vlib_get_thread_index () == 0);
1559 if (vlib_get_n_threads () < 2)
1562 if (vlib_worker_thread_barrier_held ())
1568 vec_validate (counts, vlib_get_n_threads () - 1);
1570 /* record the current loop counts */
1571 vec_foreach_index (ii, vgm->vlib_mains)
1572 counts[ii] = vgm->vlib_mains[ii]->main_loop_count;
1574 /* spin until each changes, apart from the main thread, or we'd be
1576 for (ii = 1; ii < vec_len (counts); ii++)
1578 while (counts[ii] == vgm->vlib_mains[ii]->main_loop_count)
1587 vlib_worker_flush_pending_rpc_requests (vlib_main_t *vm)
1589 vlib_main_t *vm_global = vlib_get_first_main ();
1591 ASSERT (vm != vm_global);
1593 clib_spinlock_lock_if_init (&vm_global->pending_rpc_lock);
1594 vec_append (vm_global->pending_rpc_requests, vm->pending_rpc_requests);
1595 vec_reset_length (vm->pending_rpc_requests);
1596 clib_spinlock_unlock_if_init (&vm_global->pending_rpc_lock);
1600 vlib_worker_thread_fn (void *arg)
1602 vlib_global_main_t *vgm = vlib_get_global_main ();
1603 vlib_worker_thread_t *w = (vlib_worker_thread_t *) arg;
1604 vlib_main_t *vm = vlib_get_main ();
1607 ASSERT (vm->thread_index == vlib_get_thread_index ());
1609 vlib_worker_thread_init (w);
1610 clib_time_init (&vm->clib_time);
1611 clib_mem_set_heap (w->thread_mheap);
1613 vm->worker_init_functions_called = hash_create (0, 0);
1615 e = vlib_call_init_exit_functions_no_sort (
1616 vm, &vgm->worker_init_function_registrations, 1 /* call_once */,
1619 clib_error_report (e);
1621 vlib_worker_loop (vm);
1624 VLIB_REGISTER_THREAD (worker_thread_reg, static) = {
1627 .function = vlib_worker_thread_fn,
1630 extern clib_march_fn_registration
1631 *vlib_frame_queue_dequeue_with_aux_fn_march_fn_registrations;
1632 extern clib_march_fn_registration
1633 *vlib_frame_queue_dequeue_fn_march_fn_registrations;
1635 vlib_frame_queue_main_init (u32 node_index, u32 frame_queue_nelts)
1637 vlib_thread_main_t *tm = vlib_get_thread_main ();
1638 vlib_main_t *vm = vlib_get_main ();
1639 vlib_frame_queue_main_t *fqm;
1640 vlib_frame_queue_t *fq;
1645 if (frame_queue_nelts == 0)
1646 frame_queue_nelts = FRAME_QUEUE_MAX_NELTS;
1648 num_threads = 1 /* main thread */ + tm->n_threads;
1649 ASSERT (frame_queue_nelts >= 8 + num_threads);
1651 vec_add2 (tm->frame_queue_mains, fqm, 1);
1653 node = vlib_get_node (vm, fqm->node_index);
1655 if (node->aux_offset)
1657 fqm->frame_queue_dequeue_fn =
1658 CLIB_MARCH_FN_VOID_POINTER (vlib_frame_queue_dequeue_with_aux_fn);
1662 fqm->frame_queue_dequeue_fn =
1663 CLIB_MARCH_FN_VOID_POINTER (vlib_frame_queue_dequeue_fn);
1666 fqm->node_index = node_index;
1667 fqm->frame_queue_nelts = frame_queue_nelts;
1669 vec_validate (fqm->vlib_frame_queues, tm->n_vlib_mains - 1);
1670 vec_set_len (fqm->vlib_frame_queues, 0);
1671 for (i = 0; i < tm->n_vlib_mains; i++)
1673 fq = vlib_frame_queue_alloc (frame_queue_nelts);
1674 vec_add1 (fqm->vlib_frame_queues, fq);
1677 return (fqm - tm->frame_queue_mains);
1681 vlib_process_signal_event_mt_helper (vlib_process_signal_event_mt_args_t *
1684 ASSERT (vlib_get_thread_index () == 0);
1685 vlib_process_signal_event (vlib_get_main (), args->node_index,
1686 args->type_opaque, args->data);
1689 void *rpc_call_main_thread_cb_fn;
1692 vlib_rpc_call_main_thread (void *callback, u8 * args, u32 arg_size)
1694 if (rpc_call_main_thread_cb_fn)
1696 void (*fp) (void *, u8 *, u32) = rpc_call_main_thread_cb_fn;
1697 (*fp) (callback, args, arg_size);
1700 clib_warning ("BUG: rpc_call_main_thread_cb_fn NULL!");
1704 threads_init (vlib_main_t * vm)
1706 const vlib_thread_main_t *tm = vlib_get_thread_main ();
1708 if (tm->main_lcore == ~0 && tm->n_vlib_mains > 1)
1709 return clib_error_return (0, "Configuration error, a main core must "
1710 "be specified when using worker threads");
1715 VLIB_INIT_FUNCTION (threads_init);
1717 static clib_error_t *
1718 show_clock_command_fn (vlib_main_t * vm,
1719 unformat_input_t * input, vlib_cli_command_t * cmd)
1722 clib_timebase_t _tb, *tb = &_tb;
1724 (void) unformat (input, "verbose %=", &verbose, 1);
1726 clib_timebase_init (tb, 0 /* GMT */ , CLIB_TIMEBASE_DAYLIGHT_NONE,
1729 vlib_cli_output (vm, "%U, %U GMT", format_clib_time, &vm->clib_time,
1730 verbose, format_clib_timebase_time,
1731 clib_timebase_now (tb));
1733 vlib_cli_output (vm, "Time last barrier release %.9f",
1734 vm->time_last_barrier_release);
1736 foreach_vlib_main ()
1738 vlib_cli_output (vm, "%d: %U", this_vlib_main->thread_index,
1739 format_clib_time, &this_vlib_main->clib_time, verbose);
1741 vlib_cli_output (vm, "Thread %d offset %.9f error %.9f",
1742 this_vlib_main->thread_index,
1743 this_vlib_main->time_offset,
1744 vm->time_last_barrier_release -
1745 this_vlib_main->time_last_barrier_release);
1750 VLIB_CLI_COMMAND (f_command, static) =
1752 .path = "show clock",
1753 .short_help = "show clock",
1754 .function = show_clock_command_fn,
1757 vlib_thread_main_t *
1758 vlib_get_thread_main_not_inline (void)
1760 return vlib_get_thread_main ();
1764 * fd.io coding-style-patch-verification: ON
1767 * eval: (c-set-style "gnu")