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/linux/sysfs.h>
21 #include <vlib/vlib.h>
23 #include <vlib/threads.h>
24 #include <vlib/unix/cj.h>
26 #include <vlib/stat_weak_inlines.h>
28 DECLARE_CJ_GLOBAL_LOG;
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 elog_global_id_for_msg_name (const char *msg_name)
55 h = hash_create_string (0, sizeof (uword));
57 p = hash_get_mem (h, msg_name);
60 r = elog_string (&vlib_global_main.elog_main, "%s", msg_name);
62 name_copy = format (0, "%s%c", msg_name, 0);
64 hash_set_mem (h, name_copy, r);
70 barrier_trace_sync (f64 t_entry, f64 t_open, f64 t_closed)
72 if (!vlib_worker_threads->barrier_elog_enabled)
76 ELOG_TYPE_DECLARE (e) =
78 .format = "bar-trace-%s-#%d",
79 .format_args = "T4i4",
84 u32 caller, count, t_entry, t_open, t_closed;
87 ed = ELOG_DATA (&vlib_global_main.elog_main, e);
88 ed->count = (int) vlib_worker_threads[0].barrier_sync_count;
89 ed->caller = elog_global_id_for_msg_name
90 (vlib_worker_threads[0].barrier_caller);
91 ed->t_entry = (int) (1000000.0 * t_entry);
92 ed->t_open = (int) (1000000.0 * t_open);
93 ed->t_closed = (int) (1000000.0 * t_closed);
97 barrier_trace_sync_rec (f64 t_entry)
99 if (!vlib_worker_threads->barrier_elog_enabled)
103 ELOG_TYPE_DECLARE (e) =
105 .format = "bar-syncrec-%s-#%d",
106 .format_args = "T4i4",
114 ed = ELOG_DATA (&vlib_global_main.elog_main, e);
115 ed->depth = (int) vlib_worker_threads[0].recursion_level - 1;
116 ed->caller = elog_global_id_for_msg_name
117 (vlib_worker_threads[0].barrier_caller);
121 barrier_trace_release_rec (f64 t_entry)
123 if (!vlib_worker_threads->barrier_elog_enabled)
127 ELOG_TYPE_DECLARE (e) =
129 .format = "bar-relrrec-#%d",
138 ed = ELOG_DATA (&vlib_global_main.elog_main, e);
139 ed->depth = (int) vlib_worker_threads[0].recursion_level;
143 barrier_trace_release (f64 t_entry, f64 t_closed_total, f64 t_update_main)
145 if (!vlib_worker_threads->barrier_elog_enabled)
149 ELOG_TYPE_DECLARE (e) =
151 .format = "bar-rel-#%d-e%d-u%d-t%d",
152 .format_args = "i4i4i4i4",
157 u32 count, t_entry, t_update_main, t_closed_total;
160 ed = ELOG_DATA (&vlib_global_main.elog_main, e);
161 ed->t_entry = (int) (1000000.0 * t_entry);
162 ed->t_update_main = (int) (1000000.0 * t_update_main);
163 ed->t_closed_total = (int) (1000000.0 * t_closed_total);
164 ed->count = (int) vlib_worker_threads[0].barrier_sync_count;
166 /* Reset context for next trace */
167 vlib_worker_threads[0].barrier_context = NULL;
171 os_get_nthreads (void)
173 return vec_len (vlib_thread_stacks);
177 vlib_set_thread_name (char *name)
179 int pthread_setname_np (pthread_t __target_thread, const char *__name);
181 pthread_t thread = pthread_self ();
185 rv = pthread_setname_np (thread, name);
187 clib_warning ("pthread_setname_np returned %d", rv);
192 sort_registrations_by_no_clone (void *a0, void *a1)
194 vlib_thread_registration_t **tr0 = a0;
195 vlib_thread_registration_t **tr1 = a1;
197 return ((i32) ((*tr0)->no_data_structure_clone)
198 - ((i32) ((*tr1)->no_data_structure_clone)));
202 clib_sysfs_list_to_bitmap (char *filename)
207 fp = fopen (filename, "r");
212 vec_validate (buffer, 256 - 1);
213 if (fgets ((char *) buffer, 256, fp))
216 unformat_init_string (&in, (char *) buffer,
217 strlen ((char *) buffer));
218 if (unformat (&in, "%U", unformat_bitmap_list, &r) != 1)
219 clib_warning ("unformat_bitmap_list failed");
229 /* Called early in the init sequence */
232 vlib_thread_init (vlib_main_t * vm)
234 vlib_thread_main_t *tm = &vlib_thread_main;
235 vlib_worker_thread_t *w;
236 vlib_thread_registration_t *tr;
237 u32 n_vlib_mains = 1;
242 /* get bitmaps of active cpu cores and sockets */
243 tm->cpu_core_bitmap =
244 clib_sysfs_list_to_bitmap ("/sys/devices/system/cpu/online");
245 tm->cpu_socket_bitmap =
246 clib_sysfs_list_to_bitmap ("/sys/devices/system/node/online");
248 avail_cpu = clib_bitmap_dup (tm->cpu_core_bitmap);
251 for (i = 0; i < tm->skip_cores; i++)
253 uword c = clib_bitmap_first_set (avail_cpu);
255 return clib_error_return (0, "no available cpus to skip");
257 avail_cpu = clib_bitmap_set (avail_cpu, c, 0);
260 /* grab cpu for main thread */
261 if (tm->main_lcore == ~0)
263 /* if main-lcore is not set, we try to use lcore 1 */
264 if (clib_bitmap_get (avail_cpu, 1))
267 tm->main_lcore = clib_bitmap_first_set (avail_cpu);
268 if (tm->main_lcore == (u8) ~ 0)
269 return clib_error_return (0, "no available cpus to be used for the"
274 if (clib_bitmap_get (avail_cpu, tm->main_lcore) == 0)
275 return clib_error_return (0, "cpu %u is not available to be used"
276 " for the main thread", tm->main_lcore);
278 avail_cpu = clib_bitmap_set (avail_cpu, tm->main_lcore, 0);
280 /* assume that there is socket 0 only if there is no data from sysfs */
281 if (!tm->cpu_socket_bitmap)
282 tm->cpu_socket_bitmap = clib_bitmap_set (0, 0, 1);
284 /* pin main thread to main_lcore */
285 if (tm->cb.vlib_thread_set_lcore_cb)
287 tm->cb.vlib_thread_set_lcore_cb (0, tm->main_lcore);
293 CPU_SET (tm->main_lcore, &cpuset);
294 pthread_setaffinity_np (pthread_self (), sizeof (cpu_set_t), &cpuset);
297 /* Set up thread 0 */
298 vec_validate_aligned (vlib_worker_threads, 0, CLIB_CACHE_LINE_BYTES);
299 _vec_len (vlib_worker_threads) = 1;
300 w = vlib_worker_threads;
301 w->thread_mheap = clib_mem_get_heap ();
302 w->thread_stack = vlib_thread_stacks[0];
303 w->cpu_id = tm->main_lcore;
304 w->lwp = syscall (SYS_gettid);
305 w->thread_id = pthread_self ();
306 tm->n_vlib_mains = 1;
308 if (tm->sched_policy != ~0)
310 struct sched_param sched_param;
311 if (!sched_getparam (w->lwp, &sched_param))
313 if (tm->sched_priority != ~0)
314 sched_param.sched_priority = tm->sched_priority;
315 sched_setscheduler (w->lwp, tm->sched_policy, &sched_param);
319 /* assign threads to cores and set n_vlib_mains */
324 vec_add1 (tm->registrations, tr);
328 vec_sort_with_function (tm->registrations, sort_registrations_by_no_clone);
330 for (i = 0; i < vec_len (tm->registrations); i++)
333 tr = tm->registrations[i];
334 tr->first_index = first_index;
335 first_index += tr->count;
336 n_vlib_mains += (tr->no_data_structure_clone == 0) ? tr->count : 0;
338 /* construct coremask */
339 if (tr->use_pthreads || !tr->count)
346 clib_bitmap_foreach (c, tr->coremask, ({
347 if (clib_bitmap_get(avail_cpu, c) == 0)
348 return clib_error_return (0, "cpu %u is not available to be used"
349 " for the '%s' thread",c, tr->name);
351 avail_cpu = clib_bitmap_set(avail_cpu, c, 0);
357 for (j = 0; j < tr->count; j++)
359 uword c = clib_bitmap_first_set (avail_cpu);
361 return clib_error_return (0,
362 "no available cpus to be used for"
363 " the '%s' thread", tr->name);
365 avail_cpu = clib_bitmap_set (avail_cpu, c, 0);
366 tr->coremask = clib_bitmap_set (tr->coremask, c, 1);
371 clib_bitmap_free (avail_cpu);
373 tm->n_vlib_mains = n_vlib_mains;
376 * Allocate the remaining worker threads, and thread stack vector slots
377 * from now on, calls to os_get_nthreads() will return the correct
380 vec_validate_aligned (vlib_worker_threads, first_index - 1,
381 CLIB_CACHE_LINE_BYTES);
382 vec_validate (vlib_thread_stacks, vec_len (vlib_worker_threads) - 1);
387 vlib_frame_queue_alloc (int nelts)
389 vlib_frame_queue_t *fq;
391 fq = clib_mem_alloc_aligned (sizeof (*fq), CLIB_CACHE_LINE_BYTES);
392 clib_memset (fq, 0, sizeof (*fq));
394 fq->vector_threshold = 128; // packets
395 vec_validate_aligned (fq->elts, nelts - 1, CLIB_CACHE_LINE_BYTES);
399 if (((uword) & fq->tail) & (CLIB_CACHE_LINE_BYTES - 1))
400 fformat (stderr, "WARNING: fq->tail unaligned\n");
401 if (((uword) & fq->head) & (CLIB_CACHE_LINE_BYTES - 1))
402 fformat (stderr, "WARNING: fq->head unaligned\n");
403 if (((uword) fq->elts) & (CLIB_CACHE_LINE_BYTES - 1))
404 fformat (stderr, "WARNING: fq->elts unaligned\n");
406 if (sizeof (fq->elts[0]) % CLIB_CACHE_LINE_BYTES)
407 fformat (stderr, "WARNING: fq->elts[0] size %d\n",
408 sizeof (fq->elts[0]));
409 if (nelts & (nelts - 1))
411 fformat (stderr, "FATAL: nelts MUST be a power of 2\n");
419 void vl_msg_api_handler_no_free (void *) __attribute__ ((weak));
421 vl_msg_api_handler_no_free (void *v)
425 /* Turned off, save as reference material... */
428 vlib_frame_queue_dequeue_internal (int thread_id,
429 vlib_main_t * vm, vlib_node_main_t * nm)
431 vlib_frame_queue_t *fq = vlib_frame_queues[thread_id];
432 vlib_frame_queue_elt_t *elt;
434 vlib_pending_frame_t *p;
435 vlib_node_runtime_t *r;
436 u32 node_runtime_index;
441 ASSERT (vm == vlib_mains[thread_id]);
445 if (fq->head == fq->tail)
448 elt = fq->elts + ((fq->head + 1) & (fq->nelts - 1));
453 before = clib_cpu_time_now ();
456 node_runtime_index = elt->node_runtime_index;
457 msg_type = elt->msg_type;
461 case VLIB_FRAME_QUEUE_ELT_FREE_BUFFERS:
462 vlib_buffer_free (vm, vlib_frame_vector_args (f), f->n_vectors);
463 /* note fallthrough... */
464 case VLIB_FRAME_QUEUE_ELT_FREE_FRAME:
465 r = vec_elt_at_index (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL],
467 vlib_frame_free (vm, r, f);
469 case VLIB_FRAME_QUEUE_ELT_DISPATCH_FRAME:
470 vec_add2 (vm->node_main.pending_frames, p, 1);
471 f->flags |= (VLIB_FRAME_PENDING | VLIB_FRAME_FREE_AFTER_DISPATCH);
472 p->node_runtime_index = elt->node_runtime_index;
473 p->frame_index = vlib_frame_index (vm, f);
474 p->next_frame_index = VLIB_PENDING_FRAME_NO_NEXT_FRAME;
475 fq->dequeue_vectors += (u64) f->n_vectors;
477 case VLIB_FRAME_QUEUE_ELT_API_MSG:
478 vl_msg_api_handler_no_free (f);
481 clib_warning ("bogus frame queue message, type %d", msg_type);
486 fq->dequeue_ticks += clib_cpu_time_now () - before;
487 CLIB_MEMORY_BARRIER ();
496 vlib_frame_queue_dequeue (int thread_id,
497 vlib_main_t * vm, vlib_node_main_t * nm)
499 return vlib_frame_queue_dequeue_internal (thread_id, vm, nm);
503 vlib_frame_queue_enqueue (vlib_main_t * vm, u32 node_runtime_index,
504 u32 frame_queue_index, vlib_frame_t * frame,
505 vlib_frame_queue_msg_type_t type)
507 vlib_frame_queue_t *fq = vlib_frame_queues[frame_queue_index];
508 vlib_frame_queue_elt_t *elt;
511 u64 before = clib_cpu_time_now ();
515 new_tail = clib_atomic_add_fetch (&fq->tail, 1);
517 /* Wait until a ring slot is available */
518 while (new_tail >= fq->head + fq->nelts)
520 f64 b4 = vlib_time_now_ticks (vm, before);
521 vlib_worker_thread_barrier_check (vm, b4);
522 /* Bad idea. Dequeue -> enqueue -> dequeue -> trouble */
523 // vlib_frame_queue_dequeue (vm->thread_index, vm, nm);
526 elt = fq->elts + (new_tail & (fq->nelts - 1));
528 /* this would be very bad... */
533 /* Once we enqueue the frame, frame->n_vectors is owned elsewhere... */
534 save_count = frame->n_vectors;
537 elt->node_runtime_index = node_runtime_index;
538 elt->msg_type = type;
539 CLIB_MEMORY_BARRIER ();
546 /* To be called by vlib worker threads upon startup */
548 vlib_worker_thread_init (vlib_worker_thread_t * w)
550 vlib_thread_main_t *tm = vlib_get_thread_main ();
553 * Note: disabling signals in worker threads as follows
554 * prevents the api post-mortem dump scheme from working
558 * pthread_sigmask (SIG_SETMASK, &s, 0);
562 clib_mem_set_heap (w->thread_mheap);
564 if (vec_len (tm->thread_prefix) && w->registration->short_name)
566 w->name = format (0, "%v_%s_%d%c", tm->thread_prefix,
567 w->registration->short_name, w->instance_id, '\0');
568 vlib_set_thread_name ((char *) w->name);
571 if (!w->registration->use_pthreads)
574 /* Initial barrier sync, for both worker and i/o threads */
575 clib_atomic_fetch_add (vlib_worker_threads->workers_at_barrier, 1);
577 while (*vlib_worker_threads->wait_at_barrier)
580 clib_atomic_fetch_add (vlib_worker_threads->workers_at_barrier, -1);
585 vlib_worker_thread_bootstrap_fn (void *arg)
588 vlib_worker_thread_t *w = arg;
590 w->lwp = syscall (SYS_gettid);
591 w->thread_id = pthread_self ();
593 __os_thread_index = w - vlib_worker_threads;
595 rv = (void *) clib_calljmp
596 ((uword (*)(uword)) w->thread_function,
597 (uword) arg, w->thread_stack + VLIB_THREAD_STACK_SIZE);
598 /* NOTREACHED, we hope */
603 vlib_get_thread_core_socket (vlib_worker_thread_t * w, unsigned cpu_id)
605 const char *sys_cpu_path = "/sys/devices/system/cpu/cpu";
607 int core_id = -1, socket_id = -1;
609 p = format (p, "%s%u/topology/core_id%c", sys_cpu_path, cpu_id, 0);
610 clib_sysfs_read ((char *) p, "%d", &core_id);
611 vec_reset_length (p);
613 format (p, "%s%u/topology/physical_package_id%c", sys_cpu_path, cpu_id,
615 clib_sysfs_read ((char *) p, "%d", &socket_id);
618 w->core_id = core_id;
619 w->socket_id = socket_id;
622 static clib_error_t *
623 vlib_launch_thread_int (void *fp, vlib_worker_thread_t * w, unsigned cpu_id)
625 vlib_thread_main_t *tm = &vlib_thread_main;
626 void *(*fp_arg) (void *) = fp;
629 vlib_get_thread_core_socket (w, cpu_id);
630 if (tm->cb.vlib_launch_thread_cb && !w->registration->use_pthreads)
631 return tm->cb.vlib_launch_thread_cb (fp, (void *) w, cpu_id);
637 CPU_SET (cpu_id, &cpuset);
639 if (pthread_create (&worker, NULL /* attr */ , fp_arg, (void *) w))
640 return clib_error_return_unix (0, "pthread_create");
642 if (pthread_setaffinity_np (worker, sizeof (cpu_set_t), &cpuset))
643 return clib_error_return_unix (0, "pthread_setaffinity_np");
649 static clib_error_t *
650 start_workers (vlib_main_t * vm)
653 vlib_worker_thread_t *w;
654 vlib_main_t *vm_clone;
656 vlib_thread_main_t *tm = &vlib_thread_main;
657 vlib_thread_registration_t *tr;
658 vlib_node_runtime_t *rt;
659 u32 n_vlib_mains = tm->n_vlib_mains;
660 u32 worker_thread_index;
661 u8 *main_heap = clib_mem_get_per_cpu_heap ();
663 vec_reset_length (vlib_worker_threads);
665 /* Set up the main thread */
666 vec_add2_aligned (vlib_worker_threads, w, 1, CLIB_CACHE_LINE_BYTES);
667 w->elog_track.name = "main thread";
668 elog_track_register (&vm->elog_main, &w->elog_track);
670 if (vec_len (tm->thread_prefix))
672 w->name = format (0, "%v_main%c", tm->thread_prefix, '\0');
673 vlib_set_thread_name ((char *) w->name);
677 clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES, CLIB_CACHE_LINE_BYTES);
678 vm->elog_main.lock[0] = 0;
680 if (n_vlib_mains > 1)
682 /* Replace hand-crafted length-1 vector with a real vector */
685 vec_validate_aligned (vlib_mains, tm->n_vlib_mains - 1,
686 CLIB_CACHE_LINE_BYTES);
687 _vec_len (vlib_mains) = 0;
688 vec_add1_aligned (vlib_mains, vm, CLIB_CACHE_LINE_BYTES);
690 vlib_worker_threads->wait_at_barrier =
691 clib_mem_alloc_aligned (sizeof (u32), CLIB_CACHE_LINE_BYTES);
692 vlib_worker_threads->workers_at_barrier =
693 clib_mem_alloc_aligned (sizeof (u32), CLIB_CACHE_LINE_BYTES);
695 vlib_worker_threads->node_reforks_required =
696 clib_mem_alloc_aligned (sizeof (u32), CLIB_CACHE_LINE_BYTES);
698 /* We'll need the rpc vector lock... */
699 clib_spinlock_init (&vm->pending_rpc_lock);
701 /* Ask for an initial barrier sync */
702 *vlib_worker_threads->workers_at_barrier = 0;
703 *vlib_worker_threads->wait_at_barrier = 1;
705 /* Without update or refork */
706 *vlib_worker_threads->node_reforks_required = 0;
707 vm->need_vlib_worker_thread_node_runtime_update = 0;
710 vm->barrier_epoch = 0;
711 vm->barrier_no_close_before = 0;
713 worker_thread_index = 1;
715 for (i = 0; i < vec_len (tm->registrations); i++)
717 vlib_node_main_t *nm, *nm_clone;
720 tr = tm->registrations[i];
725 for (k = 0; k < tr->count; k++)
729 vec_add2 (vlib_worker_threads, w, 1);
730 /* Currently unused, may not really work */
733 #if USE_DLMALLOC == 0
735 mheap_alloc (0 /* use VM */ , tr->mheap_size);
737 w->thread_mheap = create_mspace (tr->mheap_size,
742 w->thread_mheap = main_heap;
745 vlib_thread_stack_init (w - vlib_worker_threads);
746 w->thread_function = tr->function;
747 w->thread_function_arg = w;
749 w->registration = tr;
752 (char *) format (0, "%s %d", tr->name, k + 1);
753 vec_add1 (w->elog_track.name, 0);
754 elog_track_register (&vm->elog_main, &w->elog_track);
756 if (tr->no_data_structure_clone)
759 /* Fork vlib_global_main et al. Look for bugs here */
760 oldheap = clib_mem_set_heap (w->thread_mheap);
762 vm_clone = clib_mem_alloc_aligned (sizeof (*vm_clone),
763 CLIB_CACHE_LINE_BYTES);
764 clib_memcpy (vm_clone, vlib_mains[0], sizeof (*vm_clone));
766 vm_clone->thread_index = worker_thread_index;
767 vm_clone->heap_base = w->thread_mheap;
768 vm_clone->heap_aligned_base = (void *)
769 (((uword) w->thread_mheap) & ~(VLIB_FRAME_ALIGN - 1));
770 vm_clone->init_functions_called =
771 hash_create (0, /* value bytes */ 0);
772 vm_clone->pending_rpc_requests = 0;
773 vec_validate (vm_clone->pending_rpc_requests, 0);
774 _vec_len (vm_clone->pending_rpc_requests) = 0;
775 clib_memset (&vm_clone->random_buffer, 0,
776 sizeof (vm_clone->random_buffer));
778 nm = &vlib_mains[0]->node_main;
779 nm_clone = &vm_clone->node_main;
780 /* fork next frames array, preserving node runtime indices */
781 nm_clone->next_frames = vec_dup_aligned (nm->next_frames,
782 CLIB_CACHE_LINE_BYTES);
783 for (j = 0; j < vec_len (nm_clone->next_frames); j++)
785 vlib_next_frame_t *nf = &nm_clone->next_frames[j];
786 u32 save_node_runtime_index;
789 save_node_runtime_index = nf->node_runtime_index;
790 save_flags = nf->flags & VLIB_FRAME_NO_FREE_AFTER_DISPATCH;
791 vlib_next_frame_init (nf);
792 nf->node_runtime_index = save_node_runtime_index;
793 nf->flags = save_flags;
796 /* fork the frame dispatch queue */
797 nm_clone->pending_frames = 0;
798 vec_validate (nm_clone->pending_frames, 10);
799 _vec_len (nm_clone->pending_frames) = 0;
804 /* Allocate all nodes in single block for speed */
805 n = clib_mem_alloc_no_fail (vec_len (nm->nodes) * sizeof (*n));
807 for (j = 0; j < vec_len (nm->nodes); j++)
809 clib_memcpy (n, nm->nodes[j], sizeof (*n));
810 /* none of the copied nodes have enqueue rights given out */
811 n->owner_node_index = VLIB_INVALID_NODE_INDEX;
812 clib_memset (&n->stats_total, 0, sizeof (n->stats_total));
813 clib_memset (&n->stats_last_clear, 0,
814 sizeof (n->stats_last_clear));
815 vec_add1 (nm_clone->nodes, n);
818 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL] =
819 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL],
820 CLIB_CACHE_LINE_BYTES);
822 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL])
824 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
825 rt->thread_index = vm_clone->thread_index;
826 /* copy initial runtime_data from node */
827 if (n->runtime_data && n->runtime_data_bytes > 0)
828 clib_memcpy (rt->runtime_data, n->runtime_data,
829 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
830 n->runtime_data_bytes));
833 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT] =
834 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_INPUT],
835 CLIB_CACHE_LINE_BYTES);
836 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT])
838 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
839 rt->thread_index = vm_clone->thread_index;
840 /* copy initial runtime_data from node */
841 if (n->runtime_data && n->runtime_data_bytes > 0)
842 clib_memcpy (rt->runtime_data, n->runtime_data,
843 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
844 n->runtime_data_bytes));
847 nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT] =
848 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT],
849 CLIB_CACHE_LINE_BYTES);
851 nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT])
853 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
854 rt->thread_index = vm_clone->thread_index;
855 /* copy initial runtime_data from node */
856 if (n->runtime_data && n->runtime_data_bytes > 0)
857 clib_memcpy (rt->runtime_data, n->runtime_data,
858 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
859 n->runtime_data_bytes));
862 nm_clone->processes = vec_dup_aligned (nm->processes,
863 CLIB_CACHE_LINE_BYTES);
865 /* Create per-thread frame freelist */
866 nm_clone->frame_sizes = vec_new (vlib_frame_size_t, 1);
867 #ifdef VLIB_SUPPORTS_ARBITRARY_SCALAR_SIZES
868 nm_clone->frame_size_hash = hash_create (0, sizeof (uword));
871 /* Packet trace buffers are guaranteed to be empty, nothing to do here */
873 clib_mem_set_heap (oldheap);
874 vec_add1_aligned (vlib_mains, vm_clone, CLIB_CACHE_LINE_BYTES);
876 /* Switch to the stats segment ... */
877 void *oldheap = vlib_stats_push_heap (0);
878 vm_clone->error_main.counters = vec_dup_aligned
879 (vlib_mains[0]->error_main.counters, CLIB_CACHE_LINE_BYTES);
880 vlib_stats_pop_heap2 (vm_clone->error_main.counters,
881 worker_thread_index, oldheap, 1);
883 vm_clone->error_main.counters_last_clear = vec_dup_aligned
884 (vlib_mains[0]->error_main.counters_last_clear,
885 CLIB_CACHE_LINE_BYTES);
887 worker_thread_index++;
893 /* only have non-data-structure copy threads to create... */
894 for (i = 0; i < vec_len (tm->registrations); i++)
896 tr = tm->registrations[i];
898 for (j = 0; j < tr->count; j++)
900 vec_add2 (vlib_worker_threads, w, 1);
903 #if USE_DLMALLOC == 0
905 mheap_alloc (0 /* use VM */ , tr->mheap_size);
908 create_mspace (tr->mheap_size, 0 /* locked */ );
912 w->thread_mheap = main_heap;
914 vlib_thread_stack_init (w - vlib_worker_threads);
915 w->thread_function = tr->function;
916 w->thread_function_arg = w;
919 (char *) format (0, "%s %d", tr->name, j + 1);
920 w->registration = tr;
921 vec_add1 (w->elog_track.name, 0);
922 elog_track_register (&vm->elog_main, &w->elog_track);
927 worker_thread_index = 1;
929 for (i = 0; i < vec_len (tm->registrations); i++)
934 tr = tm->registrations[i];
936 if (tr->use_pthreads || tm->use_pthreads)
938 for (j = 0; j < tr->count; j++)
940 w = vlib_worker_threads + worker_thread_index++;
941 err = vlib_launch_thread_int (vlib_worker_thread_bootstrap_fn,
944 clib_error_report (err);
951 clib_bitmap_foreach (c, tr->coremask, ({
952 w = vlib_worker_threads + worker_thread_index++;
953 err = vlib_launch_thread_int (vlib_worker_thread_bootstrap_fn,
956 clib_error_report (err);
961 vlib_worker_thread_barrier_sync (vm);
962 vlib_worker_thread_barrier_release (vm);
966 VLIB_MAIN_LOOP_ENTER_FUNCTION (start_workers);
970 worker_thread_node_runtime_update_internal (void)
974 vlib_node_main_t *nm, *nm_clone;
975 vlib_main_t *vm_clone;
976 vlib_node_runtime_t *rt;
978 vlib_node_runtime_sync_stats (vlib_main_t * vm,
979 vlib_node_runtime_t * r,
981 uword n_vectors, uword n_clocks);
983 ASSERT (vlib_get_thread_index () == 0);
988 ASSERT (*vlib_worker_threads->wait_at_barrier == 1);
991 * Scrape all runtime stats, so we don't lose node runtime(s) with
992 * pending counts, or throw away worker / io thread counts.
994 for (j = 0; j < vec_len (nm->nodes); j++)
998 vlib_node_sync_stats (vm, n);
1001 for (i = 1; i < vec_len (vlib_mains); i++)
1005 vm_clone = vlib_mains[i];
1006 nm_clone = &vm_clone->node_main;
1008 for (j = 0; j < vec_len (nm_clone->nodes); j++)
1010 n = nm_clone->nodes[j];
1012 rt = vlib_node_get_runtime (vm_clone, n->index);
1013 vlib_node_runtime_sync_stats (vm_clone, rt, 0, 0, 0);
1017 /* Per-worker clone rebuilds are now done on each thread */
1022 vlib_worker_thread_node_refork (void)
1024 vlib_main_t *vm, *vm_clone;
1025 vlib_node_main_t *nm, *nm_clone;
1026 vlib_node_t **old_nodes_clone;
1027 vlib_node_runtime_t *rt, *old_rt;
1029 vlib_node_t *new_n_clone;
1034 nm = &vm->node_main;
1035 vm_clone = vlib_get_main ();
1036 nm_clone = &vm_clone->node_main;
1038 /* Re-clone error heap */
1039 u64 *old_counters = vm_clone->error_main.counters;
1040 u64 *old_counters_all_clear = vm_clone->error_main.counters_last_clear;
1042 clib_memcpy_fast (&vm_clone->error_main, &vm->error_main,
1043 sizeof (vm->error_main));
1044 j = vec_len (vm->error_main.counters) - 1;
1046 /* Switch to the stats segment ... */
1047 void *oldheap = vlib_stats_push_heap (0);
1048 vec_validate_aligned (old_counters, j, CLIB_CACHE_LINE_BYTES);
1049 vm_clone->error_main.counters = old_counters;
1050 vlib_stats_pop_heap2 (vm_clone->error_main.counters, vm_clone->thread_index,
1053 vec_validate_aligned (old_counters_all_clear, j, CLIB_CACHE_LINE_BYTES);
1054 vm_clone->error_main.counters_last_clear = old_counters_all_clear;
1056 nm_clone = &vm_clone->node_main;
1057 vec_free (nm_clone->next_frames);
1058 nm_clone->next_frames = vec_dup_aligned (nm->next_frames,
1059 CLIB_CACHE_LINE_BYTES);
1061 for (j = 0; j < vec_len (nm_clone->next_frames); j++)
1063 vlib_next_frame_t *nf = &nm_clone->next_frames[j];
1064 u32 save_node_runtime_index;
1067 save_node_runtime_index = nf->node_runtime_index;
1068 save_flags = nf->flags & VLIB_FRAME_NO_FREE_AFTER_DISPATCH;
1069 vlib_next_frame_init (nf);
1070 nf->node_runtime_index = save_node_runtime_index;
1071 nf->flags = save_flags;
1074 old_nodes_clone = nm_clone->nodes;
1075 nm_clone->nodes = 0;
1079 /* Allocate all nodes in single block for speed */
1081 clib_mem_alloc_no_fail (vec_len (nm->nodes) * sizeof (*new_n_clone));
1082 for (j = 0; j < vec_len (nm->nodes); j++)
1084 vlib_node_t *old_n_clone;
1087 new_n = nm->nodes[j];
1088 old_n_clone = old_nodes_clone[j];
1090 clib_memcpy_fast (new_n_clone, new_n, sizeof (*new_n));
1091 /* none of the copied nodes have enqueue rights given out */
1092 new_n_clone->owner_node_index = VLIB_INVALID_NODE_INDEX;
1094 if (j >= vec_len (old_nodes_clone))
1096 /* new node, set to zero */
1097 clib_memset (&new_n_clone->stats_total, 0,
1098 sizeof (new_n_clone->stats_total));
1099 clib_memset (&new_n_clone->stats_last_clear, 0,
1100 sizeof (new_n_clone->stats_last_clear));
1104 /* Copy stats if the old data is valid */
1105 clib_memcpy_fast (&new_n_clone->stats_total,
1106 &old_n_clone->stats_total,
1107 sizeof (new_n_clone->stats_total));
1108 clib_memcpy_fast (&new_n_clone->stats_last_clear,
1109 &old_n_clone->stats_last_clear,
1110 sizeof (new_n_clone->stats_last_clear));
1112 /* keep previous node state */
1113 new_n_clone->state = old_n_clone->state;
1115 vec_add1 (nm_clone->nodes, new_n_clone);
1118 /* Free the old node clones */
1119 clib_mem_free (old_nodes_clone[0]);
1121 vec_free (old_nodes_clone);
1124 /* re-clone internal nodes */
1125 old_rt = nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL];
1126 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL] =
1127 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL],
1128 CLIB_CACHE_LINE_BYTES);
1130 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL])
1132 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
1133 rt->thread_index = vm_clone->thread_index;
1134 /* copy runtime_data, will be overwritten later for existing rt */
1135 if (n->runtime_data && n->runtime_data_bytes > 0)
1136 clib_memcpy_fast (rt->runtime_data, n->runtime_data,
1137 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
1138 n->runtime_data_bytes));
1141 for (j = 0; j < vec_len (old_rt); j++)
1143 rt = vlib_node_get_runtime (vm_clone, old_rt[j].node_index);
1144 rt->state = old_rt[j].state;
1145 clib_memcpy_fast (rt->runtime_data, old_rt[j].runtime_data,
1146 VLIB_NODE_RUNTIME_DATA_SIZE);
1151 /* re-clone input nodes */
1152 old_rt = nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT];
1153 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT] =
1154 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_INPUT],
1155 CLIB_CACHE_LINE_BYTES);
1157 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT])
1159 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
1160 rt->thread_index = vm_clone->thread_index;
1161 /* copy runtime_data, will be overwritten later for existing rt */
1162 if (n->runtime_data && n->runtime_data_bytes > 0)
1163 clib_memcpy_fast (rt->runtime_data, n->runtime_data,
1164 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
1165 n->runtime_data_bytes));
1168 for (j = 0; j < vec_len (old_rt); j++)
1170 rt = vlib_node_get_runtime (vm_clone, old_rt[j].node_index);
1171 rt->state = old_rt[j].state;
1172 clib_memcpy_fast (rt->runtime_data, old_rt[j].runtime_data,
1173 VLIB_NODE_RUNTIME_DATA_SIZE);
1178 /* re-clone pre-input nodes */
1179 old_rt = nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT];
1180 nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT] =
1181 vec_dup_aligned (nm->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT],
1182 CLIB_CACHE_LINE_BYTES);
1184 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_PRE_INPUT])
1186 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
1187 rt->thread_index = vm_clone->thread_index;
1188 /* copy runtime_data, will be overwritten later for existing rt */
1189 if (n->runtime_data && n->runtime_data_bytes > 0)
1190 clib_memcpy_fast (rt->runtime_data, n->runtime_data,
1191 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
1192 n->runtime_data_bytes));
1195 for (j = 0; j < vec_len (old_rt); j++)
1197 rt = vlib_node_get_runtime (vm_clone, old_rt[j].node_index);
1198 rt->state = old_rt[j].state;
1199 clib_memcpy_fast (rt->runtime_data, old_rt[j].runtime_data,
1200 VLIB_NODE_RUNTIME_DATA_SIZE);
1205 nm_clone->processes = vec_dup_aligned (nm->processes,
1206 CLIB_CACHE_LINE_BYTES);
1210 vlib_worker_thread_node_runtime_update (void)
1213 * Make a note that we need to do a node runtime update
1214 * prior to releasing the barrier.
1216 vlib_global_main.need_vlib_worker_thread_node_runtime_update = 1;
1220 unformat_sched_policy (unformat_input_t * input, va_list * args)
1222 u32 *r = va_arg (*args, u32 *);
1225 #define _(v,f,s) else if (unformat (input, s)) *r = SCHED_POLICY_##f;
1226 foreach_sched_policy
1233 static clib_error_t *
1234 cpu_config (vlib_main_t * vm, unformat_input_t * input)
1236 vlib_thread_registration_t *tr;
1238 vlib_thread_main_t *tm = &vlib_thread_main;
1243 tm->thread_registrations_by_name = hash_create_string (0, sizeof (uword));
1245 tm->n_thread_stacks = 1; /* account for main thread */
1246 tm->sched_policy = ~0;
1247 tm->sched_priority = ~0;
1248 tm->main_lcore = ~0;
1254 hash_set_mem (tm->thread_registrations_by_name, tr->name, (uword) tr);
1258 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1260 if (unformat (input, "use-pthreads"))
1261 tm->use_pthreads = 1;
1262 else if (unformat (input, "thread-prefix %v", &tm->thread_prefix))
1264 else if (unformat (input, "main-core %u", &tm->main_lcore))
1266 else if (unformat (input, "skip-cores %u", &tm->skip_cores))
1268 else if (unformat (input, "coremask-%s %U", &name,
1269 unformat_bitmap_mask, &bitmap) ||
1270 unformat (input, "corelist-%s %U", &name,
1271 unformat_bitmap_list, &bitmap))
1273 p = hash_get_mem (tm->thread_registrations_by_name, name);
1275 return clib_error_return (0, "no such thread type '%s'", name);
1277 tr = (vlib_thread_registration_t *) p[0];
1279 if (tr->use_pthreads)
1280 return clib_error_return (0,
1281 "corelist cannot be set for '%s' threads",
1284 tr->coremask = bitmap;
1285 tr->count = clib_bitmap_count_set_bits (tr->coremask);
1289 (input, "scheduler-policy %U", unformat_sched_policy,
1292 else if (unformat (input, "scheduler-priority %u", &tm->sched_priority))
1294 else if (unformat (input, "%s %u", &name, &count))
1296 p = hash_get_mem (tm->thread_registrations_by_name, name);
1298 return clib_error_return (0, "no such thread type 3 '%s'", name);
1300 tr = (vlib_thread_registration_t *) p[0];
1301 if (tr->fixed_count)
1302 return clib_error_return
1303 (0, "number of %s threads not configurable", tr->name);
1310 if (tm->sched_priority != ~0)
1312 if (tm->sched_policy == SCHED_FIFO || tm->sched_policy == SCHED_RR)
1314 u32 prio_max = sched_get_priority_max (tm->sched_policy);
1315 u32 prio_min = sched_get_priority_min (tm->sched_policy);
1316 if (tm->sched_priority > prio_max)
1317 tm->sched_priority = prio_max;
1318 if (tm->sched_priority < prio_min)
1319 tm->sched_priority = prio_min;
1323 return clib_error_return
1325 "scheduling priority (%d) is not allowed for `normal` scheduling policy",
1326 tm->sched_priority);
1331 if (!tm->thread_prefix)
1332 tm->thread_prefix = format (0, "vpp");
1336 tm->n_thread_stacks += tr->count;
1337 tm->n_pthreads += tr->count * tr->use_pthreads;
1338 tm->n_threads += tr->count * (tr->use_pthreads == 0);
1345 VLIB_EARLY_CONFIG_FUNCTION (cpu_config, "cpu");
1347 void vnet_main_fixup (vlib_fork_fixup_t which) __attribute__ ((weak));
1349 vnet_main_fixup (vlib_fork_fixup_t which)
1354 vlib_worker_thread_fork_fixup (vlib_fork_fixup_t which)
1356 vlib_main_t *vm = vlib_get_main ();
1358 if (vlib_mains == 0)
1361 ASSERT (vlib_get_thread_index () == 0);
1362 vlib_worker_thread_barrier_sync (vm);
1366 case VLIB_WORKER_THREAD_FORK_FIXUP_NEW_SW_IF_INDEX:
1367 vnet_main_fixup (VLIB_WORKER_THREAD_FORK_FIXUP_NEW_SW_IF_INDEX);
1373 vlib_worker_thread_barrier_release (vm);
1377 * Enforce minimum open time to minimize packet loss due to Rx overflow,
1378 * based on a test based heuristic that barrier should be open for at least
1379 * 3 time as long as it is closed (with an upper bound of 1ms because by that
1380 * point it is probably too late to make a difference)
1383 #ifndef BARRIER_MINIMUM_OPEN_LIMIT
1384 #define BARRIER_MINIMUM_OPEN_LIMIT 0.001
1387 #ifndef BARRIER_MINIMUM_OPEN_FACTOR
1388 #define BARRIER_MINIMUM_OPEN_FACTOR 3
1392 vlib_worker_thread_initial_barrier_sync_and_release (vlib_main_t * vm)
1395 f64 now = vlib_time_now (vm);
1396 u32 count = vec_len (vlib_mains) - 1;
1398 /* No worker threads? */
1402 deadline = now + BARRIER_SYNC_TIMEOUT;
1403 *vlib_worker_threads->wait_at_barrier = 1;
1404 while (*vlib_worker_threads->workers_at_barrier != count)
1406 if ((now = vlib_time_now (vm)) > deadline)
1408 fformat (stderr, "%s: worker thread deadlock\n", __FUNCTION__);
1413 *vlib_worker_threads->wait_at_barrier = 0;
1417 vlib_worker_thread_barrier_sync_int (vlib_main_t * vm, const char *func_name)
1424 f64 max_vector_rate;
1428 if (vec_len (vlib_mains) < 2)
1431 ASSERT (vlib_get_thread_index () == 0);
1433 vlib_worker_threads[0].barrier_caller = func_name;
1434 count = vec_len (vlib_mains) - 1;
1436 /* Record entry relative to last close */
1437 now = vlib_time_now (vm);
1438 t_entry = now - vm->barrier_epoch;
1440 /* Tolerate recursive calls */
1441 if (++vlib_worker_threads[0].recursion_level > 1)
1443 barrier_trace_sync_rec (t_entry);
1448 * Need data to decide if we're working hard enough to honor
1449 * the barrier hold-down timer.
1451 max_vector_rate = 0.0;
1452 for (i = 1; i < vec_len (vlib_mains); i++)
1454 clib_max (max_vector_rate,
1455 vlib_last_vectors_per_main_loop_as_f64 (vlib_mains[i]));
1457 vlib_worker_threads[0].barrier_sync_count++;
1459 /* Enforce minimum barrier open time to minimize packet loss */
1460 ASSERT (vm->barrier_no_close_before <= (now + BARRIER_MINIMUM_OPEN_LIMIT));
1463 * If any worker thread seems busy, which we define
1464 * as a vector rate above 10, we enforce the barrier hold-down timer
1466 if (max_vector_rate > 10.0)
1470 now = vlib_time_now (vm);
1471 /* Barrier hold-down timer expired? */
1472 if (now >= vm->barrier_no_close_before)
1474 if ((vm->barrier_no_close_before - now)
1475 > (2.0 * BARRIER_MINIMUM_OPEN_LIMIT))
1478 ("clock change: would have waited for %.4f seconds",
1479 (vm->barrier_no_close_before - now));
1484 /* Record time of closure */
1485 t_open = now - vm->barrier_epoch;
1486 vm->barrier_epoch = now;
1488 deadline = now + BARRIER_SYNC_TIMEOUT;
1490 *vlib_worker_threads->wait_at_barrier = 1;
1491 while (*vlib_worker_threads->workers_at_barrier != count)
1493 if ((now = vlib_time_now (vm)) > deadline)
1495 fformat (stderr, "%s: worker thread deadlock\n", __FUNCTION__);
1500 t_closed = now - vm->barrier_epoch;
1502 barrier_trace_sync (t_entry, t_open, t_closed);
1507 vlib_worker_thread_barrier_release (vlib_main_t * vm)
1514 f64 t_update_main = 0.0;
1515 int refork_needed = 0;
1517 if (vec_len (vlib_mains) < 2)
1520 ASSERT (vlib_get_thread_index () == 0);
1523 now = vlib_time_now (vm);
1524 t_entry = now - vm->barrier_epoch;
1526 if (--vlib_worker_threads[0].recursion_level > 0)
1528 barrier_trace_release_rec (t_entry);
1532 /* Update (all) node runtimes before releasing the barrier, if needed */
1533 if (vm->need_vlib_worker_thread_node_runtime_update)
1536 * Lock stat segment here, so we's safe when
1537 * rebuilding the stat segment node clones from the
1540 vlib_stat_segment_lock ();
1542 /* Do stats elements on main thread */
1543 worker_thread_node_runtime_update_internal ();
1544 vm->need_vlib_worker_thread_node_runtime_update = 0;
1546 /* Do per thread rebuilds in parallel */
1548 clib_atomic_fetch_add (vlib_worker_threads->node_reforks_required,
1549 (vec_len (vlib_mains) - 1));
1550 now = vlib_time_now (vm);
1551 t_update_main = now - vm->barrier_epoch;
1554 deadline = now + BARRIER_SYNC_TIMEOUT;
1557 * Note when we let go of the barrier.
1558 * Workers can use this to derive a reasonably accurate
1559 * time offset. See vlib_time_now(...)
1561 vm->time_last_barrier_release = vlib_time_now (vm);
1562 CLIB_MEMORY_STORE_BARRIER ();
1564 *vlib_worker_threads->wait_at_barrier = 0;
1566 while (*vlib_worker_threads->workers_at_barrier > 0)
1568 if ((now = vlib_time_now (vm)) > deadline)
1570 fformat (stderr, "%s: worker thread deadlock\n", __FUNCTION__);
1575 /* Wait for reforks before continuing */
1578 now = vlib_time_now (vm);
1580 deadline = now + BARRIER_SYNC_TIMEOUT;
1582 while (*vlib_worker_threads->node_reforks_required > 0)
1584 if ((now = vlib_time_now (vm)) > deadline)
1586 fformat (stderr, "%s: worker thread refork deadlock\n",
1591 vlib_stat_segment_unlock ();
1594 t_closed_total = now - vm->barrier_epoch;
1596 minimum_open = t_closed_total * BARRIER_MINIMUM_OPEN_FACTOR;
1598 if (minimum_open > BARRIER_MINIMUM_OPEN_LIMIT)
1600 minimum_open = BARRIER_MINIMUM_OPEN_LIMIT;
1603 vm->barrier_no_close_before = now + minimum_open;
1605 /* Record barrier epoch (used to enforce minimum open time) */
1606 vm->barrier_epoch = now;
1608 barrier_trace_release (t_entry, t_closed_total, t_update_main);
1613 * Check the frame queue to see if any frames are available.
1614 * If so, pull the packets off the frames and put them to
1618 vlib_frame_queue_dequeue (vlib_main_t * vm, vlib_frame_queue_main_t * fqm)
1620 u32 thread_id = vm->thread_index;
1621 vlib_frame_queue_t *fq = fqm->vlib_frame_queues[thread_id];
1622 vlib_frame_queue_elt_t *elt;
1631 ASSERT (vm == vlib_mains[thread_id]);
1633 if (PREDICT_FALSE (fqm->node_index == ~0))
1636 * Gather trace data for frame queues
1638 if (PREDICT_FALSE (fq->trace))
1640 frame_queue_trace_t *fqt;
1641 frame_queue_nelt_counter_t *fqh;
1644 fqt = &fqm->frame_queue_traces[thread_id];
1646 fqt->nelts = fq->nelts;
1647 fqt->head = fq->head;
1648 fqt->head_hint = fq->head_hint;
1649 fqt->tail = fq->tail;
1650 fqt->threshold = fq->vector_threshold;
1651 fqt->n_in_use = fqt->tail - fqt->head;
1652 if (fqt->n_in_use >= fqt->nelts)
1654 // if beyond max then use max
1655 fqt->n_in_use = fqt->nelts - 1;
1658 /* Record the number of elements in use in the histogram */
1659 fqh = &fqm->frame_queue_histogram[thread_id];
1660 fqh->count[fqt->n_in_use]++;
1662 /* Record a snapshot of the elements in use */
1663 for (elix = 0; elix < fqt->nelts; elix++)
1665 elt = fq->elts + ((fq->head + 1 + elix) & (fq->nelts - 1));
1666 if (1 || elt->valid)
1668 fqt->n_vectors[elix] = elt->n_vectors;
1676 if (fq->head == fq->tail)
1678 fq->head_hint = fq->head;
1682 elt = fq->elts + ((fq->head + 1) & (fq->nelts - 1));
1686 fq->head_hint = fq->head;
1690 from = elt->buffer_index;
1691 msg_type = elt->msg_type;
1693 ASSERT (msg_type == VLIB_FRAME_QUEUE_ELT_DISPATCH_FRAME);
1694 ASSERT (elt->n_vectors <= VLIB_FRAME_SIZE);
1696 f = vlib_get_frame_to_node (vm, fqm->node_index);
1698 to = vlib_frame_vector_args (f);
1700 n_left_to_node = elt->n_vectors;
1702 while (n_left_to_node >= 4)
1710 n_left_to_node -= 4;
1713 while (n_left_to_node > 0)
1721 vectors += elt->n_vectors;
1722 f->n_vectors = elt->n_vectors;
1723 vlib_put_frame_to_node (vm, fqm->node_index, f);
1727 elt->msg_type = 0xfefefefe;
1728 CLIB_MEMORY_BARRIER ();
1733 * Limit the number of packets pushed into the graph
1735 if (vectors >= fq->vector_threshold)
1737 fq->head_hint = fq->head;
1746 vlib_worker_thread_fn (void *arg)
1748 vlib_worker_thread_t *w = (vlib_worker_thread_t *) arg;
1749 vlib_thread_main_t *tm = vlib_get_thread_main ();
1750 vlib_main_t *vm = vlib_get_main ();
1753 ASSERT (vm->thread_index == vlib_get_thread_index ());
1755 vlib_worker_thread_init (w);
1756 clib_time_init (&vm->clib_time);
1757 clib_mem_set_heap (w->thread_mheap);
1759 e = vlib_call_init_exit_functions_no_sort
1760 (vm, &vm->worker_init_function_registrations, 1 /* call_once */ );
1762 clib_error_report (e);
1764 /* Wait until the dpdk init sequence is complete */
1765 while (tm->extern_thread_mgmt && tm->worker_thread_release == 0)
1766 vlib_worker_thread_barrier_check ();
1768 vlib_worker_loop (vm);
1772 VLIB_REGISTER_THREAD (worker_thread_reg, static) = {
1775 .function = vlib_worker_thread_fn,
1780 vlib_frame_queue_main_init (u32 node_index, u32 frame_queue_nelts)
1782 vlib_thread_main_t *tm = vlib_get_thread_main ();
1783 vlib_frame_queue_main_t *fqm;
1784 vlib_frame_queue_t *fq;
1787 if (frame_queue_nelts == 0)
1788 frame_queue_nelts = FRAME_QUEUE_MAX_NELTS;
1790 ASSERT (frame_queue_nelts >= 8);
1792 vec_add2 (tm->frame_queue_mains, fqm, 1);
1794 fqm->node_index = node_index;
1795 fqm->frame_queue_nelts = frame_queue_nelts;
1796 fqm->queue_hi_thresh = frame_queue_nelts - 2;
1798 vec_validate (fqm->vlib_frame_queues, tm->n_vlib_mains - 1);
1799 vec_validate (fqm->per_thread_data, tm->n_vlib_mains - 1);
1800 _vec_len (fqm->vlib_frame_queues) = 0;
1801 for (i = 0; i < tm->n_vlib_mains; i++)
1803 vlib_frame_queue_per_thread_data_t *ptd;
1804 fq = vlib_frame_queue_alloc (frame_queue_nelts);
1805 vec_add1 (fqm->vlib_frame_queues, fq);
1807 ptd = vec_elt_at_index (fqm->per_thread_data, i);
1808 vec_validate (ptd->handoff_queue_elt_by_thread_index,
1809 tm->n_vlib_mains - 1);
1810 vec_validate_init_empty (ptd->congested_handoff_queue_by_thread_index,
1811 tm->n_vlib_mains - 1,
1812 (vlib_frame_queue_t *) (~0));
1815 return (fqm - tm->frame_queue_mains);
1819 vlib_thread_cb_register (struct vlib_main_t *vm, vlib_thread_callbacks_t * cb)
1821 vlib_thread_main_t *tm = vlib_get_thread_main ();
1823 if (tm->extern_thread_mgmt)
1826 tm->cb.vlib_launch_thread_cb = cb->vlib_launch_thread_cb;
1827 tm->extern_thread_mgmt = 1;
1832 vlib_process_signal_event_mt_helper (vlib_process_signal_event_mt_args_t *
1835 ASSERT (vlib_get_thread_index () == 0);
1836 vlib_process_signal_event (vlib_get_main (), args->node_index,
1837 args->type_opaque, args->data);
1840 void *rpc_call_main_thread_cb_fn;
1843 vlib_rpc_call_main_thread (void *callback, u8 * args, u32 arg_size)
1845 if (rpc_call_main_thread_cb_fn)
1847 void (*fp) (void *, u8 *, u32) = rpc_call_main_thread_cb_fn;
1848 (*fp) (callback, args, arg_size);
1851 clib_warning ("BUG: rpc_call_main_thread_cb_fn NULL!");
1855 threads_init (vlib_main_t * vm)
1860 VLIB_INIT_FUNCTION (threads_init);
1863 static clib_error_t *
1864 show_clock_command_fn (vlib_main_t * vm,
1865 unformat_input_t * input, vlib_cli_command_t * cmd)
1870 now = vlib_time_now (vm);
1872 vlib_cli_output (vm, "Time now %.9f", now);
1874 if (vec_len (vlib_mains) == 1)
1877 vlib_cli_output (vm, "Time last barrier release %.9f",
1878 vm->time_last_barrier_release);
1880 for (i = 1; i < vec_len (vlib_mains); i++)
1882 if (vlib_mains[i] == 0)
1884 vlib_cli_output (vm, "Thread %d offset %.9f error %.9f", i,
1885 vlib_mains[i]->time_offset,
1886 vm->time_last_barrier_release -
1887 vlib_mains[i]->time_last_barrier_release);
1893 VLIB_CLI_COMMAND (f_command, static) =
1895 .path = "show clock",
1896 .short_help = "show clock",
1897 .function = show_clock_command_fn,
1902 * fd.io coding-style-patch-verification: ON
1905 * eval: (c-set-style "gnu")