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Ed Warnickecb9cada2015-12-08 15:45:58 -07001/*
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:
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
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.
14 */
Christophe Fontainefef15b42016-04-09 12:38:49 +090015#define _GNU_SOURCE
Christophe Fontainefef15b42016-04-09 12:38:49 +090016
Ed Warnickecb9cada2015-12-08 15:45:58 -070017#include <signal.h>
18#include <math.h>
19#include <vppinfra/format.h>
20#include <vlib/vlib.h>
21
22#include <vlib/threads.h>
Ed Warnickecb9cada2015-12-08 15:45:58 -070023#include <vlib/unix/cj.h>
24
Ed Warnickecb9cada2015-12-08 15:45:58 -070025DECLARE_CJ_GLOBAL_LOG;
26
27#define FRAME_QUEUE_NELTS 32
28
Dave Barach9b8ffd92016-07-08 08:13:45 -040029u32
30vl (void *p)
Ed Warnickecb9cada2015-12-08 15:45:58 -070031{
32 return vec_len (p);
33}
34
Damjan Marion6a7acc22016-12-19 16:28:36 +010035vlib_worker_thread_t *vlib_worker_threads;
Ed Warnickecb9cada2015-12-08 15:45:58 -070036vlib_thread_main_t vlib_thread_main;
37
38uword
Damjan Marionf55f9b82017-05-10 21:06:28 +020039os_get_nthreads (void)
Dave Barach01d86c72016-08-08 15:13:42 -040040{
41 u32 len;
42
43 len = vec_len (vlib_thread_stacks);
44 if (len == 0)
45 return 1;
46 else
47 return len;
48}
49
Ed Warnickecb9cada2015-12-08 15:45:58 -070050void
51vlib_set_thread_name (char *name)
52{
53 int pthread_setname_np (pthread_t __target_thread, const char *__name);
Dave Barachb2a6e252016-07-27 10:00:58 -040054 int rv;
Dave Barach9b8ffd92016-07-08 08:13:45 -040055 pthread_t thread = pthread_self ();
Ed Warnickecb9cada2015-12-08 15:45:58 -070056
Dave Barach9b8ffd92016-07-08 08:13:45 -040057 if (thread)
Dave Barachb2a6e252016-07-27 10:00:58 -040058 {
59 rv = pthread_setname_np (thread, name);
60 if (rv)
Ed Warnicke853e7202016-08-12 11:42:26 -070061 clib_warning ("pthread_setname_np returned %d", rv);
Dave Barachb2a6e252016-07-27 10:00:58 -040062 }
Ed Warnickecb9cada2015-12-08 15:45:58 -070063}
64
Dave Barach9b8ffd92016-07-08 08:13:45 -040065static int
66sort_registrations_by_no_clone (void *a0, void *a1)
67{
68 vlib_thread_registration_t **tr0 = a0;
69 vlib_thread_registration_t **tr1 = a1;
Ed Warnickecb9cada2015-12-08 15:45:58 -070070
Dave Barach9b8ffd92016-07-08 08:13:45 -040071 return ((i32) ((*tr0)->no_data_structure_clone)
72 - ((i32) ((*tr1)->no_data_structure_clone)));
Ed Warnickecb9cada2015-12-08 15:45:58 -070073}
74
75static uword *
Dave Barach9b8ffd92016-07-08 08:13:45 -040076vlib_sysfs_list_to_bitmap (char *filename)
Ed Warnickecb9cada2015-12-08 15:45:58 -070077{
78 FILE *fp;
79 uword *r = 0;
80
81 fp = fopen (filename, "r");
82
83 if (fp != NULL)
84 {
Dave Barach9b8ffd92016-07-08 08:13:45 -040085 u8 *buffer = 0;
86 vec_validate (buffer, 256 - 1);
87 if (fgets ((char *) buffer, 256, fp))
88 {
89 unformat_input_t in;
90 unformat_init_string (&in, (char *) buffer,
91 strlen ((char *) buffer));
Dave Barachb2a6e252016-07-27 10:00:58 -040092 if (unformat (&in, "%U", unformat_bitmap_list, &r) != 1)
Ed Warnicke853e7202016-08-12 11:42:26 -070093 clib_warning ("unformat_bitmap_list failed");
Dave Barach9b8ffd92016-07-08 08:13:45 -040094 unformat_free (&in);
95 }
96 vec_free (buffer);
97 fclose (fp);
Ed Warnickecb9cada2015-12-08 15:45:58 -070098 }
99 return r;
100}
101
102
103/* Called early in the init sequence */
104
105clib_error_t *
106vlib_thread_init (vlib_main_t * vm)
107{
Dave Barach9b8ffd92016-07-08 08:13:45 -0400108 vlib_thread_main_t *tm = &vlib_thread_main;
109 vlib_worker_thread_t *w;
110 vlib_thread_registration_t *tr;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700111 u32 n_vlib_mains = 1;
112 u32 first_index = 1;
113 u32 i;
Dave Barach9b8ffd92016-07-08 08:13:45 -0400114 uword *avail_cpu;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700115
116 /* get bitmaps of active cpu cores and sockets */
117 tm->cpu_core_bitmap =
Dave Barach9b8ffd92016-07-08 08:13:45 -0400118 vlib_sysfs_list_to_bitmap ("/sys/devices/system/cpu/online");
Ed Warnickecb9cada2015-12-08 15:45:58 -0700119 tm->cpu_socket_bitmap =
Dave Barach9b8ffd92016-07-08 08:13:45 -0400120 vlib_sysfs_list_to_bitmap ("/sys/devices/system/node/online");
Ed Warnickecb9cada2015-12-08 15:45:58 -0700121
Dave Barach9b8ffd92016-07-08 08:13:45 -0400122 avail_cpu = clib_bitmap_dup (tm->cpu_core_bitmap);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700123
124 /* skip cores */
Dave Barach9b8ffd92016-07-08 08:13:45 -0400125 for (i = 0; i < tm->skip_cores; i++)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700126 {
Dave Barach9b8ffd92016-07-08 08:13:45 -0400127 uword c = clib_bitmap_first_set (avail_cpu);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700128 if (c == ~0)
Dave Barach9b8ffd92016-07-08 08:13:45 -0400129 return clib_error_return (0, "no available cpus to skip");
Ed Warnickecb9cada2015-12-08 15:45:58 -0700130
Dave Barach9b8ffd92016-07-08 08:13:45 -0400131 avail_cpu = clib_bitmap_set (avail_cpu, c, 0);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700132 }
133
134 /* grab cpu for main thread */
135 if (!tm->main_lcore)
136 {
Dave Barach9b8ffd92016-07-08 08:13:45 -0400137 tm->main_lcore = clib_bitmap_first_set (avail_cpu);
138 if (tm->main_lcore == (u8) ~ 0)
139 return clib_error_return (0, "no available cpus to be used for the"
140 " main thread");
Ed Warnickecb9cada2015-12-08 15:45:58 -0700141 }
142 else
143 {
Dave Barach9b8ffd92016-07-08 08:13:45 -0400144 if (clib_bitmap_get (avail_cpu, tm->main_lcore) == 0)
145 return clib_error_return (0, "cpu %u is not available to be used"
146 " for the main thread", tm->main_lcore);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700147 }
Dave Barach9b8ffd92016-07-08 08:13:45 -0400148 avail_cpu = clib_bitmap_set (avail_cpu, tm->main_lcore, 0);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700149
150 /* assume that there is socket 0 only if there is no data from sysfs */
151 if (!tm->cpu_socket_bitmap)
Dave Barach9b8ffd92016-07-08 08:13:45 -0400152 tm->cpu_socket_bitmap = clib_bitmap_set (0, 0, 1);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700153
Christophe Fontainefef15b42016-04-09 12:38:49 +0900154 /* pin main thread to main_lcore */
Damjan Marion878c6092017-01-04 13:19:27 +0100155 if (tm->cb.vlib_thread_set_lcore_cb)
156 {
157 tm->cb.vlib_thread_set_lcore_cb (0, tm->main_lcore);
158 }
159 else
160 {
161 cpu_set_t cpuset;
162 CPU_ZERO (&cpuset);
163 CPU_SET (tm->main_lcore, &cpuset);
164 pthread_setaffinity_np (pthread_self (), sizeof (cpu_set_t), &cpuset);
165 }
Christophe Fontainefef15b42016-04-09 12:38:49 +0900166
Ed Warnickecb9cada2015-12-08 15:45:58 -0700167 /* as many threads as stacks... */
Dave Barach9b8ffd92016-07-08 08:13:45 -0400168 vec_validate_aligned (vlib_worker_threads, vec_len (vlib_thread_stacks) - 1,
169 CLIB_CACHE_LINE_BYTES);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700170
171 /* Preallocate thread 0 */
Dave Barach9b8ffd92016-07-08 08:13:45 -0400172 _vec_len (vlib_worker_threads) = 1;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700173 w = vlib_worker_threads;
Dave Barach9b8ffd92016-07-08 08:13:45 -0400174 w->thread_mheap = clib_mem_get_heap ();
Ed Warnickecb9cada2015-12-08 15:45:58 -0700175 w->thread_stack = vlib_thread_stacks[0];
Pavel Kotucek98765202016-10-07 08:37:28 +0200176 w->lcore_id = tm->main_lcore;
Dave Barach9b8ffd92016-07-08 08:13:45 -0400177 w->lwp = syscall (SYS_gettid);
Pavel Kotucek98765202016-10-07 08:37:28 +0200178 w->thread_id = pthread_self ();
Ed Warnickecb9cada2015-12-08 15:45:58 -0700179 tm->n_vlib_mains = 1;
180
Pavel Kotucek1e765832016-09-23 08:54:14 +0200181 if (tm->sched_policy != ~0)
182 {
183 struct sched_param sched_param;
184 if (!sched_getparam (w->lwp, &sched_param))
185 {
186 if (tm->sched_priority != ~0)
187 sched_param.sched_priority = tm->sched_priority;
188 sched_setscheduler (w->lwp, tm->sched_policy, &sched_param);
189 }
190 }
191
Ed Warnickecb9cada2015-12-08 15:45:58 -0700192 /* assign threads to cores and set n_vlib_mains */
193 tr = tm->next;
194
195 while (tr)
196 {
197 vec_add1 (tm->registrations, tr);
198 tr = tr->next;
199 }
200
Dave Barach9b8ffd92016-07-08 08:13:45 -0400201 vec_sort_with_function (tm->registrations, sort_registrations_by_no_clone);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700202
203 for (i = 0; i < vec_len (tm->registrations); i++)
204 {
205 int j;
206 tr = tm->registrations[i];
207 tr->first_index = first_index;
208 first_index += tr->count;
209 n_vlib_mains += (tr->no_data_structure_clone == 0) ? tr->count : 0;
210
211 /* construct coremask */
212 if (tr->use_pthreads || !tr->count)
Dave Barach9b8ffd92016-07-08 08:13:45 -0400213 continue;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700214
215 if (tr->coremask)
Dave Barach9b8ffd92016-07-08 08:13:45 -0400216 {
217 uword c;
218 /* *INDENT-OFF* */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700219 clib_bitmap_foreach (c, tr->coremask, ({
220 if (clib_bitmap_get(avail_cpu, c) == 0)
221 return clib_error_return (0, "cpu %u is not available to be used"
222 " for the '%s' thread",c, tr->name);
223
224 avail_cpu = clib_bitmap_set(avail_cpu, c, 0);
225 }));
Dave Barach9b8ffd92016-07-08 08:13:45 -0400226/* *INDENT-ON* */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700227
Dave Barach9b8ffd92016-07-08 08:13:45 -0400228 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700229 else
Dave Barach9b8ffd92016-07-08 08:13:45 -0400230 {
231 for (j = 0; j < tr->count; j++)
232 {
233 uword c = clib_bitmap_first_set (avail_cpu);
234 if (c == ~0)
235 return clib_error_return (0,
236 "no available cpus to be used for"
237 " the '%s' thread", tr->name);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700238
Dave Barach9b8ffd92016-07-08 08:13:45 -0400239 avail_cpu = clib_bitmap_set (avail_cpu, c, 0);
240 tr->coremask = clib_bitmap_set (tr->coremask, c, 1);
241 }
242 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700243 }
244
Dave Barach9b8ffd92016-07-08 08:13:45 -0400245 clib_bitmap_free (avail_cpu);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700246
247 tm->n_vlib_mains = n_vlib_mains;
248
Dave Barach9b8ffd92016-07-08 08:13:45 -0400249 vec_validate_aligned (vlib_worker_threads, first_index - 1,
250 CLIB_CACHE_LINE_BYTES);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700251
Ed Warnickecb9cada2015-12-08 15:45:58 -0700252 return 0;
253}
254
Dave Barach9b8ffd92016-07-08 08:13:45 -0400255vlib_frame_queue_t *
256vlib_frame_queue_alloc (int nelts)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700257{
Dave Barach9b8ffd92016-07-08 08:13:45 -0400258 vlib_frame_queue_t *fq;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700259
Dave Barach9b8ffd92016-07-08 08:13:45 -0400260 fq = clib_mem_alloc_aligned (sizeof (*fq), CLIB_CACHE_LINE_BYTES);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700261 memset (fq, 0, sizeof (*fq));
262 fq->nelts = nelts;
Dave Barach9b8ffd92016-07-08 08:13:45 -0400263 fq->vector_threshold = 128; // packets
264 vec_validate_aligned (fq->elts, nelts - 1, CLIB_CACHE_LINE_BYTES);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700265
266 if (1)
Dave Barach9b8ffd92016-07-08 08:13:45 -0400267 {
268 if (((uword) & fq->tail) & (CLIB_CACHE_LINE_BYTES - 1))
269 fformat (stderr, "WARNING: fq->tail unaligned\n");
270 if (((uword) & fq->head) & (CLIB_CACHE_LINE_BYTES - 1))
271 fformat (stderr, "WARNING: fq->head unaligned\n");
272 if (((uword) fq->elts) & (CLIB_CACHE_LINE_BYTES - 1))
273 fformat (stderr, "WARNING: fq->elts unaligned\n");
274
275 if (sizeof (fq->elts[0]) % CLIB_CACHE_LINE_BYTES)
276 fformat (stderr, "WARNING: fq->elts[0] size %d\n",
277 sizeof (fq->elts[0]));
278 if (nelts & (nelts - 1))
279 {
280 fformat (stderr, "FATAL: nelts MUST be a power of 2\n");
281 abort ();
282 }
283 }
284
Ed Warnickecb9cada2015-12-08 15:45:58 -0700285 return (fq);
286}
287
288void vl_msg_api_handler_no_free (void *) __attribute__ ((weak));
Dave Barach9b8ffd92016-07-08 08:13:45 -0400289void
290vl_msg_api_handler_no_free (void *v)
291{
292}
Ed Warnickecb9cada2015-12-08 15:45:58 -0700293
294/* Turned off, save as reference material... */
295#if 0
Dave Barach9b8ffd92016-07-08 08:13:45 -0400296static inline int
297vlib_frame_queue_dequeue_internal (int thread_id,
298 vlib_main_t * vm, vlib_node_main_t * nm)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700299{
300 vlib_frame_queue_t *fq = vlib_frame_queues[thread_id];
301 vlib_frame_queue_elt_t *elt;
302 vlib_frame_t *f;
303 vlib_pending_frame_t *p;
304 vlib_node_runtime_t *r;
305 u32 node_runtime_index;
306 int msg_type;
307 u64 before;
308 int processed = 0;
Dave Barach9b8ffd92016-07-08 08:13:45 -0400309
310 ASSERT (vm == vlib_mains[thread_id]);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700311
312 while (1)
313 {
314 if (fq->head == fq->tail)
Dave Barach9b8ffd92016-07-08 08:13:45 -0400315 return processed;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700316
Dave Barach9b8ffd92016-07-08 08:13:45 -0400317 elt = fq->elts + ((fq->head + 1) & (fq->nelts - 1));
Ed Warnickecb9cada2015-12-08 15:45:58 -0700318
319 if (!elt->valid)
Dave Barach9b8ffd92016-07-08 08:13:45 -0400320 return processed;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700321
Dave Barach9b8ffd92016-07-08 08:13:45 -0400322 before = clib_cpu_time_now ();
Ed Warnickecb9cada2015-12-08 15:45:58 -0700323
324 f = elt->frame;
325 node_runtime_index = elt->node_runtime_index;
326 msg_type = elt->msg_type;
327
328 switch (msg_type)
Dave Barach9b8ffd92016-07-08 08:13:45 -0400329 {
330 case VLIB_FRAME_QUEUE_ELT_FREE_BUFFERS:
331 vlib_buffer_free (vm, vlib_frame_vector_args (f), f->n_vectors);
332 /* note fallthrough... */
333 case VLIB_FRAME_QUEUE_ELT_FREE_FRAME:
334 r = vec_elt_at_index (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL],
335 node_runtime_index);
336 vlib_frame_free (vm, r, f);
337 break;
338 case VLIB_FRAME_QUEUE_ELT_DISPATCH_FRAME:
339 vec_add2 (vm->node_main.pending_frames, p, 1);
340 f->flags |= (VLIB_FRAME_PENDING | VLIB_FRAME_FREE_AFTER_DISPATCH);
341 p->node_runtime_index = elt->node_runtime_index;
342 p->frame_index = vlib_frame_index (vm, f);
343 p->next_frame_index = VLIB_PENDING_FRAME_NO_NEXT_FRAME;
344 fq->dequeue_vectors += (u64) f->n_vectors;
345 break;
346 case VLIB_FRAME_QUEUE_ELT_API_MSG:
347 vl_msg_api_handler_no_free (f);
348 break;
349 default:
350 clib_warning ("bogus frame queue message, type %d", msg_type);
351 break;
352 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700353 elt->valid = 0;
354 fq->dequeues++;
Dave Barach9b8ffd92016-07-08 08:13:45 -0400355 fq->dequeue_ticks += clib_cpu_time_now () - before;
356 CLIB_MEMORY_BARRIER ();
Ed Warnickecb9cada2015-12-08 15:45:58 -0700357 fq->head++;
358 processed++;
359 }
Dave Barach9b8ffd92016-07-08 08:13:45 -0400360 ASSERT (0);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700361 return processed;
362}
363
Dave Barach9b8ffd92016-07-08 08:13:45 -0400364int
365vlib_frame_queue_dequeue (int thread_id,
366 vlib_main_t * vm, vlib_node_main_t * nm)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700367{
368 return vlib_frame_queue_dequeue_internal (thread_id, vm, nm);
369}
370
Dave Barach9b8ffd92016-07-08 08:13:45 -0400371int
372vlib_frame_queue_enqueue (vlib_main_t * vm, u32 node_runtime_index,
373 u32 frame_queue_index, vlib_frame_t * frame,
374 vlib_frame_queue_msg_type_t type)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700375{
376 vlib_frame_queue_t *fq = vlib_frame_queues[frame_queue_index];
377 vlib_frame_queue_elt_t *elt;
378 u32 save_count;
379 u64 new_tail;
Dave Barach9b8ffd92016-07-08 08:13:45 -0400380 u64 before = clib_cpu_time_now ();
381
Ed Warnickecb9cada2015-12-08 15:45:58 -0700382 ASSERT (fq);
383
384 new_tail = __sync_add_and_fetch (&fq->tail, 1);
385
386 /* Wait until a ring slot is available */
387 while (new_tail >= fq->head + fq->nelts)
388 {
389 f64 b4 = vlib_time_now_ticks (vm, before);
390 vlib_worker_thread_barrier_check (vm, b4);
391 /* Bad idea. Dequeue -> enqueue -> dequeue -> trouble */
Damjan Marion586afd72017-04-05 19:18:20 +0200392 // vlib_frame_queue_dequeue (vm->thread_index, vm, nm);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700393 }
394
Dave Barach9b8ffd92016-07-08 08:13:45 -0400395 elt = fq->elts + (new_tail & (fq->nelts - 1));
Ed Warnickecb9cada2015-12-08 15:45:58 -0700396
397 /* this would be very bad... */
Dave Barach9b8ffd92016-07-08 08:13:45 -0400398 while (elt->valid)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700399 {
400 }
401
402 /* Once we enqueue the frame, frame->n_vectors is owned elsewhere... */
403 save_count = frame->n_vectors;
404
405 elt->frame = frame;
406 elt->node_runtime_index = node_runtime_index;
407 elt->msg_type = type;
Dave Barach9b8ffd92016-07-08 08:13:45 -0400408 CLIB_MEMORY_BARRIER ();
Ed Warnickecb9cada2015-12-08 15:45:58 -0700409 elt->valid = 1;
410
411 return save_count;
412}
413#endif /* 0 */
414
415/* To be called by vlib worker threads upon startup */
Dave Barach9b8ffd92016-07-08 08:13:45 -0400416void
417vlib_worker_thread_init (vlib_worker_thread_t * w)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700418{
Dave Barach9b8ffd92016-07-08 08:13:45 -0400419 vlib_thread_main_t *tm = vlib_get_thread_main ();
420
Dave Barachfdf49442016-12-20 12:48:14 -0500421 /*
422 * Note: disabling signals in worker threads as follows
423 * prevents the api post-mortem dump scheme from working
424 * {
425 * sigset_t s;
426 * sigfillset (&s);
427 * pthread_sigmask (SIG_SETMASK, &s, 0);
428 * }
429 */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700430
431 clib_mem_set_heap (w->thread_mheap);
432
Dave Barach9b8ffd92016-07-08 08:13:45 -0400433 if (vec_len (tm->thread_prefix) && w->registration->short_name)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700434 {
Dave Barach9b8ffd92016-07-08 08:13:45 -0400435 w->name = format (0, "%v_%s_%d%c", tm->thread_prefix,
436 w->registration->short_name, w->instance_id, '\0');
437 vlib_set_thread_name ((char *) w->name);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700438 }
439
440 if (!w->registration->use_pthreads)
441 {
442
443 /* Initial barrier sync, for both worker and i/o threads */
444 clib_smp_atomic_add (vlib_worker_threads->workers_at_barrier, 1);
445
446 while (*vlib_worker_threads->wait_at_barrier)
Dave Barach9b8ffd92016-07-08 08:13:45 -0400447 ;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700448
449 clib_smp_atomic_add (vlib_worker_threads->workers_at_barrier, -1);
450 }
451}
452
Dave Barach9b8ffd92016-07-08 08:13:45 -0400453void *
454vlib_worker_thread_bootstrap_fn (void *arg)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700455{
456 void *rv;
457 vlib_worker_thread_t *w = arg;
Dave Barach9b8ffd92016-07-08 08:13:45 -0400458
459 w->lwp = syscall (SYS_gettid);
Pavel Kotucek98765202016-10-07 08:37:28 +0200460 w->thread_id = pthread_self ();
Ed Warnickecb9cada2015-12-08 15:45:58 -0700461
Damjan Marionf55f9b82017-05-10 21:06:28 +0200462 __os_thread_index = w - vlib_worker_threads;
Damjan Marion586afd72017-04-05 19:18:20 +0200463
Dave Barach9b8ffd92016-07-08 08:13:45 -0400464 rv = (void *) clib_calljmp
465 ((uword (*)(uword)) w->thread_function,
466 (uword) arg, w->thread_stack + VLIB_THREAD_STACK_SIZE);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700467 /* NOTREACHED, we hope */
468 return rv;
469}
470
Damjan Marion878c6092017-01-04 13:19:27 +0100471static clib_error_t *
472vlib_launch_thread_int (void *fp, vlib_worker_thread_t * w, unsigned lcore_id)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700473{
Damjan Marion878c6092017-01-04 13:19:27 +0100474 vlib_thread_main_t *tm = &vlib_thread_main;
Dave Barach9b8ffd92016-07-08 08:13:45 -0400475 void *(*fp_arg) (void *) = fp;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700476
Pavel Kotucek98765202016-10-07 08:37:28 +0200477 w->lcore_id = lcore_id;
Damjan Marion878c6092017-01-04 13:19:27 +0100478 if (tm->cb.vlib_launch_thread_cb && !w->registration->use_pthreads)
479 return tm->cb.vlib_launch_thread_cb (fp, (void *) w, lcore_id);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700480 else
Dave Barach9b8ffd92016-07-08 08:13:45 -0400481 {
Dave Barach9b8ffd92016-07-08 08:13:45 -0400482 pthread_t worker;
483 cpu_set_t cpuset;
484 CPU_ZERO (&cpuset);
485 CPU_SET (lcore_id, &cpuset);
Christophe Fontainefef15b42016-04-09 12:38:49 +0900486
Damjan Marion878c6092017-01-04 13:19:27 +0100487 if (pthread_create (&worker, NULL /* attr */ , fp_arg, (void *) w))
488 return clib_error_return_unix (0, "pthread_create");
489
490 if (pthread_setaffinity_np (worker, sizeof (cpu_set_t), &cpuset))
491 return clib_error_return_unix (0, "pthread_setaffinity_np");
492
493 return 0;
Dave Barach9b8ffd92016-07-08 08:13:45 -0400494 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700495}
496
Dave Barach9b8ffd92016-07-08 08:13:45 -0400497static clib_error_t *
498start_workers (vlib_main_t * vm)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700499{
500 int i, j;
501 vlib_worker_thread_t *w;
502 vlib_main_t *vm_clone;
503 void *oldheap;
Dave Barach9b8ffd92016-07-08 08:13:45 -0400504 vlib_thread_main_t *tm = &vlib_thread_main;
505 vlib_thread_registration_t *tr;
506 vlib_node_runtime_t *rt;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700507 u32 n_vlib_mains = tm->n_vlib_mains;
508 u32 worker_thread_index;
Dave Barach9b8ffd92016-07-08 08:13:45 -0400509 u8 *main_heap = clib_mem_get_per_cpu_heap ();
510 mheap_t *main_heap_header = mheap_header (main_heap);
511
Ed Warnickecb9cada2015-12-08 15:45:58 -0700512 vec_reset_length (vlib_worker_threads);
513
514 /* Set up the main thread */
515 vec_add2_aligned (vlib_worker_threads, w, 1, CLIB_CACHE_LINE_BYTES);
Dave Barach3e7deb12016-02-05 16:29:53 -0500516 w->elog_track.name = "main thread";
Ed Warnickecb9cada2015-12-08 15:45:58 -0700517 elog_track_register (&vm->elog_main, &w->elog_track);
518
Dave Barach9b8ffd92016-07-08 08:13:45 -0400519 if (vec_len (tm->thread_prefix))
Ed Warnickecb9cada2015-12-08 15:45:58 -0700520 {
Dave Barach9b8ffd92016-07-08 08:13:45 -0400521 w->name = format (0, "%v_main%c", tm->thread_prefix, '\0');
522 vlib_set_thread_name ((char *) w->name);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700523 }
524
Dave Barach9b8ffd92016-07-08 08:13:45 -0400525 /*
Dave Barach848191d2016-04-28 16:24:15 -0400526 * Truth of the matter: we always use at least two
Dave Barach9b8ffd92016-07-08 08:13:45 -0400527 * threads. So, make the main heap thread-safe
Dave Barach848191d2016-04-28 16:24:15 -0400528 * and make the event log thread-safe.
529 */
530 main_heap_header->flags |= MHEAP_FLAG_THREAD_SAFE;
Dave Barach9b8ffd92016-07-08 08:13:45 -0400531 vm->elog_main.lock =
532 clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES, CLIB_CACHE_LINE_BYTES);
Dave Barach848191d2016-04-28 16:24:15 -0400533 vm->elog_main.lock[0] = 0;
Dave Barach9b8ffd92016-07-08 08:13:45 -0400534
Ed Warnickecb9cada2015-12-08 15:45:58 -0700535 if (n_vlib_mains > 1)
536 {
Dave Barach80f54e22017-03-08 19:08:56 -0500537 /* Replace hand-crafted length-1 vector with a real vector */
538 vlib_mains = 0;
539
540 vec_validate_aligned (vlib_mains, tm->n_vlib_mains - 1,
541 CLIB_CACHE_LINE_BYTES);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700542 _vec_len (vlib_mains) = 0;
Dave Barach80f54e22017-03-08 19:08:56 -0500543 vec_add1_aligned (vlib_mains, vm, CLIB_CACHE_LINE_BYTES);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700544
Dave Barach9b8ffd92016-07-08 08:13:45 -0400545 vlib_worker_threads->wait_at_barrier =
546 clib_mem_alloc_aligned (sizeof (u32), CLIB_CACHE_LINE_BYTES);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700547 vlib_worker_threads->workers_at_barrier =
Dave Barach9b8ffd92016-07-08 08:13:45 -0400548 clib_mem_alloc_aligned (sizeof (u32), CLIB_CACHE_LINE_BYTES);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700549
550 /* Ask for an initial barrier sync */
551 *vlib_worker_threads->workers_at_barrier = 0;
552 *vlib_worker_threads->wait_at_barrier = 1;
553
554 worker_thread_index = 1;
555
Dave Barach9b8ffd92016-07-08 08:13:45 -0400556 for (i = 0; i < vec_len (tm->registrations); i++)
557 {
558 vlib_node_main_t *nm, *nm_clone;
559 vlib_buffer_main_t *bm_clone;
560 vlib_buffer_free_list_t *fl_clone, *fl_orig;
561 vlib_buffer_free_list_t *orig_freelist_pool;
562 int k;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700563
Dave Barach9b8ffd92016-07-08 08:13:45 -0400564 tr = tm->registrations[i];
Ed Warnickecb9cada2015-12-08 15:45:58 -0700565
Dave Barach9b8ffd92016-07-08 08:13:45 -0400566 if (tr->count == 0)
567 continue;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700568
Dave Barach9b8ffd92016-07-08 08:13:45 -0400569 for (k = 0; k < tr->count; k++)
570 {
571 vec_add2 (vlib_worker_threads, w, 1);
572 if (tr->mheap_size)
573 w->thread_mheap =
574 mheap_alloc (0 /* use VM */ , tr->mheap_size);
575 else
576 w->thread_mheap = main_heap;
Damjan Marion586afd72017-04-05 19:18:20 +0200577
578 w->thread_stack =
579 vlib_thread_stack_init (w - vlib_worker_threads);
Dave Barach9b8ffd92016-07-08 08:13:45 -0400580 w->thread_function = tr->function;
581 w->thread_function_arg = w;
582 w->instance_id = k;
583 w->registration = tr;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700584
Dave Barach9b8ffd92016-07-08 08:13:45 -0400585 w->elog_track.name =
586 (char *) format (0, "%s %d", tr->name, k + 1);
587 vec_add1 (w->elog_track.name, 0);
588 elog_track_register (&vm->elog_main, &w->elog_track);
Bud Grise68adab92016-02-12 10:36:11 -0500589
Dave Barach9b8ffd92016-07-08 08:13:45 -0400590 if (tr->no_data_structure_clone)
591 continue;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700592
Dave Barach9b8ffd92016-07-08 08:13:45 -0400593 /* Fork vlib_global_main et al. Look for bugs here */
594 oldheap = clib_mem_set_heap (w->thread_mheap);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700595
Dave Barach9b8ffd92016-07-08 08:13:45 -0400596 vm_clone = clib_mem_alloc (sizeof (*vm_clone));
597 clib_memcpy (vm_clone, vlib_mains[0], sizeof (*vm_clone));
Ed Warnickecb9cada2015-12-08 15:45:58 -0700598
Damjan Marion586afd72017-04-05 19:18:20 +0200599 vm_clone->thread_index = worker_thread_index;
Dave Barach9b8ffd92016-07-08 08:13:45 -0400600 vm_clone->heap_base = w->thread_mheap;
601 vm_clone->mbuf_alloc_list = 0;
Damjan Marione9f929b2017-03-16 11:32:09 +0100602 vm_clone->init_functions_called =
603 hash_create (0, /* value bytes */ 0);
Dave Barach9b8ffd92016-07-08 08:13:45 -0400604 memset (&vm_clone->random_buffer, 0,
605 sizeof (vm_clone->random_buffer));
Ed Warnickecb9cada2015-12-08 15:45:58 -0700606
Dave Barach9b8ffd92016-07-08 08:13:45 -0400607 nm = &vlib_mains[0]->node_main;
608 nm_clone = &vm_clone->node_main;
609 /* fork next frames array, preserving node runtime indices */
610 nm_clone->next_frames = vec_dup (nm->next_frames);
611 for (j = 0; j < vec_len (nm_clone->next_frames); j++)
612 {
613 vlib_next_frame_t *nf = &nm_clone->next_frames[j];
614 u32 save_node_runtime_index;
615 u32 save_flags;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700616
Dave Barach9b8ffd92016-07-08 08:13:45 -0400617 save_node_runtime_index = nf->node_runtime_index;
618 save_flags = nf->flags & VLIB_FRAME_NO_FREE_AFTER_DISPATCH;
619 vlib_next_frame_init (nf);
620 nf->node_runtime_index = save_node_runtime_index;
621 nf->flags = save_flags;
622 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700623
Dave Barach9b8ffd92016-07-08 08:13:45 -0400624 /* fork the frame dispatch queue */
625 nm_clone->pending_frames = 0;
626 vec_validate (nm_clone->pending_frames, 10); /* $$$$$?????? */
627 _vec_len (nm_clone->pending_frames) = 0;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700628
Dave Barach9b8ffd92016-07-08 08:13:45 -0400629 /* fork nodes */
630 nm_clone->nodes = 0;
631 for (j = 0; j < vec_len (nm->nodes); j++)
632 {
633 vlib_node_t *n;
634 n = clib_mem_alloc_no_fail (sizeof (*n));
635 clib_memcpy (n, nm->nodes[j], sizeof (*n));
636 /* none of the copied nodes have enqueue rights given out */
637 n->owner_node_index = VLIB_INVALID_NODE_INDEX;
638 memset (&n->stats_total, 0, sizeof (n->stats_total));
639 memset (&n->stats_last_clear, 0,
640 sizeof (n->stats_last_clear));
641 vec_add1 (nm_clone->nodes, n);
642 }
643 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL] =
644 vec_dup (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL]);
Damjan Marione9f929b2017-03-16 11:32:09 +0100645 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT])
646 {
647 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
Damjan Marion586afd72017-04-05 19:18:20 +0200648 rt->thread_index = vm_clone->thread_index;
Damjan Marione9f929b2017-03-16 11:32:09 +0100649 /* copy initial runtime_data from node */
Damjan Marionb6f93a12017-03-16 17:46:41 +0100650 if (n->runtime_data && n->runtime_data_bytes > 0)
Damjan Marione9f929b2017-03-16 11:32:09 +0100651 clib_memcpy (rt->runtime_data, n->runtime_data,
Damjan Marionb6f93a12017-03-16 17:46:41 +0100652 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
653 n->runtime_data_bytes));
Damjan Marione9f929b2017-03-16 11:32:09 +0100654 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700655
Dave Barach9b8ffd92016-07-08 08:13:45 -0400656 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT] =
657 vec_dup (nm->nodes_by_type[VLIB_NODE_TYPE_INPUT]);
658 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT])
Damjan Marione9f929b2017-03-16 11:32:09 +0100659 {
660 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
Damjan Marion586afd72017-04-05 19:18:20 +0200661 rt->thread_index = vm_clone->thread_index;
Damjan Marione9f929b2017-03-16 11:32:09 +0100662 /* copy initial runtime_data from node */
Damjan Marionb6f93a12017-03-16 17:46:41 +0100663 if (n->runtime_data && n->runtime_data_bytes > 0)
Damjan Marione9f929b2017-03-16 11:32:09 +0100664 clib_memcpy (rt->runtime_data, n->runtime_data,
Damjan Marionb6f93a12017-03-16 17:46:41 +0100665 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
666 n->runtime_data_bytes));
Damjan Marione9f929b2017-03-16 11:32:09 +0100667 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700668
Dave Barach9b8ffd92016-07-08 08:13:45 -0400669 nm_clone->processes = vec_dup (nm->processes);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700670
Dave Barach9b8ffd92016-07-08 08:13:45 -0400671 /* zap the (per worker) frame freelists, etc */
672 nm_clone->frame_sizes = 0;
673 nm_clone->frame_size_hash = 0;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700674
Dave Barach9b8ffd92016-07-08 08:13:45 -0400675 /* Packet trace buffers are guaranteed to be empty, nothing to do here */
Damjan Marionbc20bdf2015-12-17 14:28:18 +0100676
Dave Barach9b8ffd92016-07-08 08:13:45 -0400677 clib_mem_set_heap (oldheap);
Dave Barach80f54e22017-03-08 19:08:56 -0500678 vec_add1_aligned (vlib_mains, vm_clone, CLIB_CACHE_LINE_BYTES);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700679
Dave Barach9b8ffd92016-07-08 08:13:45 -0400680 vm_clone->error_main.counters =
681 vec_dup (vlib_mains[0]->error_main.counters);
682 vm_clone->error_main.counters_last_clear =
683 vec_dup (vlib_mains[0]->error_main.counters_last_clear);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700684
Dave Barach9b8ffd92016-07-08 08:13:45 -0400685 /* Fork the vlib_buffer_main_t free lists, etc. */
686 bm_clone = vec_dup (vm_clone->buffer_main);
687 vm_clone->buffer_main = bm_clone;
688
689 orig_freelist_pool = bm_clone->buffer_free_list_pool;
690 bm_clone->buffer_free_list_pool = 0;
691
692 /* *INDENT-OFF* */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700693 pool_foreach (fl_orig, orig_freelist_pool,
694 ({
Dave Barach9b8ffd92016-07-08 08:13:45 -0400695 pool_get_aligned (bm_clone->buffer_free_list_pool,
Ed Warnickecb9cada2015-12-08 15:45:58 -0700696 fl_clone, CLIB_CACHE_LINE_BYTES);
Dave Barach9b8ffd92016-07-08 08:13:45 -0400697 ASSERT (fl_orig - orig_freelist_pool
Ed Warnickecb9cada2015-12-08 15:45:58 -0700698 == fl_clone - bm_clone->buffer_free_list_pool);
699
700 fl_clone[0] = fl_orig[0];
Damjan Marionbd69a5f2017-02-05 23:44:42 +0100701 fl_clone->buffers = 0;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700702 fl_clone->n_alloc = 0;
703 }));
Dave Barach9b8ffd92016-07-08 08:13:45 -0400704/* *INDENT-ON* */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700705
Dave Barach9b8ffd92016-07-08 08:13:45 -0400706 worker_thread_index++;
707 }
708 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700709 }
710 else
711 {
712 /* only have non-data-structure copy threads to create... */
Dave Barach9b8ffd92016-07-08 08:13:45 -0400713 for (i = 0; i < vec_len (tm->registrations); i++)
714 {
715 tr = tm->registrations[i];
Ed Warnickecb9cada2015-12-08 15:45:58 -0700716
Dave Barach9b8ffd92016-07-08 08:13:45 -0400717 for (j = 0; j < tr->count; j++)
718 {
719 vec_add2 (vlib_worker_threads, w, 1);
720 if (tr->mheap_size)
721 w->thread_mheap =
722 mheap_alloc (0 /* use VM */ , tr->mheap_size);
723 else
724 w->thread_mheap = main_heap;
Damjan Marion586afd72017-04-05 19:18:20 +0200725 w->thread_stack =
726 vlib_thread_stack_init (w - vlib_worker_threads);
Dave Barach9b8ffd92016-07-08 08:13:45 -0400727 w->thread_function = tr->function;
728 w->thread_function_arg = w;
729 w->instance_id = j;
730 w->elog_track.name =
731 (char *) format (0, "%s %d", tr->name, j + 1);
732 w->registration = tr;
733 vec_add1 (w->elog_track.name, 0);
734 elog_track_register (&vm->elog_main, &w->elog_track);
735 }
736 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700737 }
738
739 worker_thread_index = 1;
740
741 for (i = 0; i < vec_len (tm->registrations); i++)
742 {
Damjan Marion878c6092017-01-04 13:19:27 +0100743 clib_error_t *err;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700744 int j;
745
746 tr = tm->registrations[i];
747
748 if (tr->use_pthreads || tm->use_pthreads)
Dave Barach9b8ffd92016-07-08 08:13:45 -0400749 {
750 for (j = 0; j < tr->count; j++)
751 {
752 w = vlib_worker_threads + worker_thread_index++;
Damjan Marion878c6092017-01-04 13:19:27 +0100753 err = vlib_launch_thread_int (vlib_worker_thread_bootstrap_fn,
754 w, 0);
755 if (err)
756 clib_error_report (err);
Dave Barach9b8ffd92016-07-08 08:13:45 -0400757 }
758 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700759 else
Dave Barach9b8ffd92016-07-08 08:13:45 -0400760 {
761 uword c;
Damjan Marion878c6092017-01-04 13:19:27 +0100762 /* *INDENT-OFF* */
763 clib_bitmap_foreach (c, tr->coremask, ({
764 w = vlib_worker_threads + worker_thread_index++;
765 err = vlib_launch_thread_int (vlib_worker_thread_bootstrap_fn,
766 w, c);
767 if (err)
768 clib_error_report (err);
769 }));
770 /* *INDENT-ON* */
Dave Barach9b8ffd92016-07-08 08:13:45 -0400771 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700772 }
Dave Barach9b8ffd92016-07-08 08:13:45 -0400773 vlib_worker_thread_barrier_sync (vm);
774 vlib_worker_thread_barrier_release (vm);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700775 return 0;
776}
777
778VLIB_MAIN_LOOP_ENTER_FUNCTION (start_workers);
779
Dave Barach9b8ffd92016-07-08 08:13:45 -0400780void
781vlib_worker_thread_node_runtime_update (void)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700782{
783 int i, j;
784 vlib_worker_thread_t *w;
785 vlib_main_t *vm;
786 vlib_node_main_t *nm, *nm_clone;
Dave Barach9b8ffd92016-07-08 08:13:45 -0400787 vlib_node_t **old_nodes_clone;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700788 vlib_main_t *vm_clone;
Dave Barach9b8ffd92016-07-08 08:13:45 -0400789 vlib_node_runtime_t *rt, *old_rt;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700790 void *oldheap;
791 never_inline void
792 vlib_node_runtime_sync_stats (vlib_main_t * vm,
Dave Barach9b8ffd92016-07-08 08:13:45 -0400793 vlib_node_runtime_t * r,
794 uword n_calls,
795 uword n_vectors, uword n_clocks);
796
Damjan Marion586afd72017-04-05 19:18:20 +0200797 ASSERT (vlib_get_thread_index () == 0);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700798
Dave Barach80f54e22017-03-08 19:08:56 -0500799 if (vec_len (vlib_mains) == 1)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700800 return;
801
802 vm = vlib_mains[0];
803 nm = &vm->node_main;
804
Damjan Marion586afd72017-04-05 19:18:20 +0200805 ASSERT (vlib_get_thread_index () == 0);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700806 ASSERT (*vlib_worker_threads->wait_at_barrier == 1);
807
Dave Barach9b8ffd92016-07-08 08:13:45 -0400808 /*
Ed Warnickecb9cada2015-12-08 15:45:58 -0700809 * Scrape all runtime stats, so we don't lose node runtime(s) with
810 * pending counts, or throw away worker / io thread counts.
811 */
Dave Barach9b8ffd92016-07-08 08:13:45 -0400812 for (j = 0; j < vec_len (nm->nodes); j++)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700813 {
Dave Barach9b8ffd92016-07-08 08:13:45 -0400814 vlib_node_t *n;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700815 n = nm->nodes[j];
816 vlib_node_sync_stats (vm, n);
817 }
818
819 for (i = 1; i < vec_len (vlib_mains); i++)
820 {
Dave Barach9b8ffd92016-07-08 08:13:45 -0400821 vlib_node_t *n;
822
Ed Warnickecb9cada2015-12-08 15:45:58 -0700823 vm_clone = vlib_mains[i];
824 nm_clone = &vm_clone->node_main;
825
Dave Barach9b8ffd92016-07-08 08:13:45 -0400826 for (j = 0; j < vec_len (nm_clone->nodes); j++)
827 {
828 n = nm_clone->nodes[j];
Ed Warnickecb9cada2015-12-08 15:45:58 -0700829
Dave Barach9b8ffd92016-07-08 08:13:45 -0400830 rt = vlib_node_get_runtime (vm_clone, n->index);
831 vlib_node_runtime_sync_stats (vm_clone, rt, 0, 0, 0);
832 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700833 }
834
835 for (i = 1; i < vec_len (vlib_mains); i++)
836 {
Dave Barach9b8ffd92016-07-08 08:13:45 -0400837 vlib_node_runtime_t *rt;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700838 w = vlib_worker_threads + i;
839 oldheap = clib_mem_set_heap (w->thread_mheap);
Damjan Marionbc20bdf2015-12-17 14:28:18 +0100840
Ed Warnickecb9cada2015-12-08 15:45:58 -0700841 vm_clone = vlib_mains[i];
842
843 /* Re-clone error heap */
Dave Barach9b8ffd92016-07-08 08:13:45 -0400844 u64 *old_counters = vm_clone->error_main.counters;
845 u64 *old_counters_all_clear = vm_clone->error_main.counters_last_clear;
846 clib_memcpy (&vm_clone->error_main, &vm->error_main,
847 sizeof (vm->error_main));
848 j = vec_len (vm->error_main.counters) - 1;
849 vec_validate_aligned (old_counters, j, CLIB_CACHE_LINE_BYTES);
850 vec_validate_aligned (old_counters_all_clear, j, CLIB_CACHE_LINE_BYTES);
Damjan Marionbc20bdf2015-12-17 14:28:18 +0100851 vm_clone->error_main.counters = old_counters;
852 vm_clone->error_main.counters_last_clear = old_counters_all_clear;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700853
854 nm_clone = &vm_clone->node_main;
855 vec_free (nm_clone->next_frames);
856 nm_clone->next_frames = vec_dup (nm->next_frames);
Damjan Marionbc20bdf2015-12-17 14:28:18 +0100857
Ed Warnickecb9cada2015-12-08 15:45:58 -0700858 for (j = 0; j < vec_len (nm_clone->next_frames); j++)
Dave Barach9b8ffd92016-07-08 08:13:45 -0400859 {
860 vlib_next_frame_t *nf = &nm_clone->next_frames[j];
861 u32 save_node_runtime_index;
862 u32 save_flags;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700863
Dave Barach9b8ffd92016-07-08 08:13:45 -0400864 save_node_runtime_index = nf->node_runtime_index;
865 save_flags = nf->flags & VLIB_FRAME_NO_FREE_AFTER_DISPATCH;
866 vlib_next_frame_init (nf);
867 nf->node_runtime_index = save_node_runtime_index;
868 nf->flags = save_flags;
869 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700870
871 old_nodes_clone = nm_clone->nodes;
872 nm_clone->nodes = 0;
873
874 /* re-fork nodes */
Dave Barach9b8ffd92016-07-08 08:13:45 -0400875 for (j = 0; j < vec_len (nm->nodes); j++)
876 {
877 vlib_node_t *old_n_clone;
878 vlib_node_t *new_n, *new_n_clone;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700879
Dave Barach9b8ffd92016-07-08 08:13:45 -0400880 new_n = nm->nodes[j];
881 old_n_clone = old_nodes_clone[j];
Ed Warnickecb9cada2015-12-08 15:45:58 -0700882
Dave Barach9b8ffd92016-07-08 08:13:45 -0400883 new_n_clone = clib_mem_alloc_no_fail (sizeof (*new_n_clone));
884 clib_memcpy (new_n_clone, new_n, sizeof (*new_n));
885 /* none of the copied nodes have enqueue rights given out */
886 new_n_clone->owner_node_index = VLIB_INVALID_NODE_INDEX;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700887
Dave Barach9b8ffd92016-07-08 08:13:45 -0400888 if (j >= vec_len (old_nodes_clone))
889 {
890 /* new node, set to zero */
891 memset (&new_n_clone->stats_total, 0,
892 sizeof (new_n_clone->stats_total));
893 memset (&new_n_clone->stats_last_clear, 0,
894 sizeof (new_n_clone->stats_last_clear));
895 }
896 else
897 {
898 /* Copy stats if the old data is valid */
899 clib_memcpy (&new_n_clone->stats_total,
900 &old_n_clone->stats_total,
901 sizeof (new_n_clone->stats_total));
902 clib_memcpy (&new_n_clone->stats_last_clear,
903 &old_n_clone->stats_last_clear,
904 sizeof (new_n_clone->stats_last_clear));
Ed Warnickecb9cada2015-12-08 15:45:58 -0700905
Dave Barach9b8ffd92016-07-08 08:13:45 -0400906 /* keep previous node state */
907 new_n_clone->state = old_n_clone->state;
908 }
909 vec_add1 (nm_clone->nodes, new_n_clone);
910 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700911 /* Free the old node clone */
Dave Barach9b8ffd92016-07-08 08:13:45 -0400912 for (j = 0; j < vec_len (old_nodes_clone); j++)
913 clib_mem_free (old_nodes_clone[j]);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700914 vec_free (old_nodes_clone);
Dave Barach9b8ffd92016-07-08 08:13:45 -0400915
Ed Warnickecb9cada2015-12-08 15:45:58 -0700916
Damjan Marione9f929b2017-03-16 11:32:09 +0100917 /* re-clone internal nodes */
918 old_rt = nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL];
Ed Warnickecb9cada2015-12-08 15:45:58 -0700919 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL] =
Dave Barach9b8ffd92016-07-08 08:13:45 -0400920 vec_dup (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL]);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700921
Damjan Marione9f929b2017-03-16 11:32:09 +0100922 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL])
Dave Barach9b8ffd92016-07-08 08:13:45 -0400923 {
Damjan Marione9f929b2017-03-16 11:32:09 +0100924 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
Damjan Marion586afd72017-04-05 19:18:20 +0200925 rt->thread_index = vm_clone->thread_index;
Damjan Marione9f929b2017-03-16 11:32:09 +0100926 /* copy runtime_data, will be overwritten later for existing rt */
Damjan Marionb6f93a12017-03-16 17:46:41 +0100927 if (n->runtime_data && n->runtime_data_bytes > 0)
928 clib_memcpy (rt->runtime_data, n->runtime_data,
929 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
930 n->runtime_data_bytes));
Dave Barach9b8ffd92016-07-08 08:13:45 -0400931 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700932
Dave Barach9b8ffd92016-07-08 08:13:45 -0400933 for (j = 0; j < vec_len (old_rt); j++)
934 {
935 rt = vlib_node_get_runtime (vm_clone, old_rt[j].node_index);
936 rt->state = old_rt[j].state;
Damjan Marione9f929b2017-03-16 11:32:09 +0100937 clib_memcpy (rt->runtime_data, old_rt[j].runtime_data,
938 VLIB_NODE_RUNTIME_DATA_SIZE);
939 }
940
941 vec_free (old_rt);
942
943 /* re-clone input nodes */
944 old_rt = nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT];
945 nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT] =
946 vec_dup (nm->nodes_by_type[VLIB_NODE_TYPE_INPUT]);
947
948 vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT])
949 {
950 vlib_node_t *n = vlib_get_node (vm, rt->node_index);
Damjan Marion586afd72017-04-05 19:18:20 +0200951 rt->thread_index = vm_clone->thread_index;
Damjan Marione9f929b2017-03-16 11:32:09 +0100952 /* copy runtime_data, will be overwritten later for existing rt */
Damjan Marionb6f93a12017-03-16 17:46:41 +0100953 if (n->runtime_data && n->runtime_data_bytes > 0)
954 clib_memcpy (rt->runtime_data, n->runtime_data,
955 clib_min (VLIB_NODE_RUNTIME_DATA_SIZE,
956 n->runtime_data_bytes));
Damjan Marione9f929b2017-03-16 11:32:09 +0100957 }
958
959 for (j = 0; j < vec_len (old_rt); j++)
960 {
961 rt = vlib_node_get_runtime (vm_clone, old_rt[j].node_index);
962 rt->state = old_rt[j].state;
963 clib_memcpy (rt->runtime_data, old_rt[j].runtime_data,
964 VLIB_NODE_RUNTIME_DATA_SIZE);
Dave Barach9b8ffd92016-07-08 08:13:45 -0400965 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700966
Dave Barach9b8ffd92016-07-08 08:13:45 -0400967 vec_free (old_rt);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700968
969 nm_clone->processes = vec_dup (nm->processes);
970
971 clib_mem_set_heap (oldheap);
972
973 // vnet_main_fork_fixup (i);
974 }
975}
976
Pavel Kotucek1e765832016-09-23 08:54:14 +0200977u32
978unformat_sched_policy (unformat_input_t * input, va_list * args)
979{
980 u32 *r = va_arg (*args, u32 *);
981
982 if (0);
983#define _(v,f,s) else if (unformat (input, s)) *r = SCHED_POLICY_##f;
984 foreach_sched_policy
985#undef _
986 else
987 return 0;
988 return 1;
989}
990
Ed Warnickecb9cada2015-12-08 15:45:58 -0700991static clib_error_t *
992cpu_config (vlib_main_t * vm, unformat_input_t * input)
993{
994 vlib_thread_registration_t *tr;
Dave Barach9b8ffd92016-07-08 08:13:45 -0400995 uword *p;
996 vlib_thread_main_t *tm = &vlib_thread_main;
997 u8 *name;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700998 u64 coremask;
Dave Barach9b8ffd92016-07-08 08:13:45 -0400999 uword *bitmap;
Ed Warnickecb9cada2015-12-08 15:45:58 -07001000 u32 count;
1001
1002 tm->thread_registrations_by_name = hash_create_string (0, sizeof (uword));
Pavel Kotucek1e765832016-09-23 08:54:14 +02001003
Dave Barach9b8ffd92016-07-08 08:13:45 -04001004 tm->n_thread_stacks = 1; /* account for main thread */
Pavel Kotucek1e765832016-09-23 08:54:14 +02001005 tm->sched_policy = ~0;
1006 tm->sched_priority = ~0;
Ed Warnickecb9cada2015-12-08 15:45:58 -07001007
1008 tr = tm->next;
1009
1010 while (tr)
1011 {
Dave Barach9b8ffd92016-07-08 08:13:45 -04001012 hash_set_mem (tm->thread_registrations_by_name, tr->name, (uword) tr);
Ed Warnickecb9cada2015-12-08 15:45:58 -07001013 tr = tr->next;
1014 }
1015
Dave Barach9b8ffd92016-07-08 08:13:45 -04001016 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
Ed Warnickecb9cada2015-12-08 15:45:58 -07001017 {
Damjan Marionbf741472016-06-13 22:49:44 +02001018 if (unformat (input, "use-pthreads"))
Dave Barach9b8ffd92016-07-08 08:13:45 -04001019 tm->use_pthreads = 1;
Ed Warnickecb9cada2015-12-08 15:45:58 -07001020 else if (unformat (input, "thread-prefix %v", &tm->thread_prefix))
Dave Barach9b8ffd92016-07-08 08:13:45 -04001021 ;
Ed Warnickecb9cada2015-12-08 15:45:58 -07001022 else if (unformat (input, "main-core %u", &tm->main_lcore))
Dave Barach9b8ffd92016-07-08 08:13:45 -04001023 ;
Ed Warnickecb9cada2015-12-08 15:45:58 -07001024 else if (unformat (input, "skip-cores %u", &tm->skip_cores))
Dave Barach9b8ffd92016-07-08 08:13:45 -04001025 ;
Ed Warnickecb9cada2015-12-08 15:45:58 -07001026 else if (unformat (input, "coremask-%s %llx", &name, &coremask))
Dave Barach9b8ffd92016-07-08 08:13:45 -04001027 {
1028 p = hash_get_mem (tm->thread_registrations_by_name, name);
1029 if (p == 0)
1030 return clib_error_return (0, "no such thread type '%s'", name);
Ed Warnickecb9cada2015-12-08 15:45:58 -07001031
Dave Barach9b8ffd92016-07-08 08:13:45 -04001032 tr = (vlib_thread_registration_t *) p[0];
Ed Warnickecb9cada2015-12-08 15:45:58 -07001033
Dave Barach9b8ffd92016-07-08 08:13:45 -04001034 if (tr->use_pthreads)
1035 return clib_error_return (0,
1036 "coremask cannot be set for '%s' threads",
1037 name);
Ed Warnickecb9cada2015-12-08 15:45:58 -07001038
Dave Barach9b8ffd92016-07-08 08:13:45 -04001039 tr->coremask = clib_bitmap_set_multiple
1040 (tr->coremask, 0, coremask, BITS (coremask));
1041 tr->count = clib_bitmap_count_set_bits (tr->coremask);
1042 }
Ed Warnickecb9cada2015-12-08 15:45:58 -07001043 else if (unformat (input, "corelist-%s %U", &name, unformat_bitmap_list,
Dave Barach9b8ffd92016-07-08 08:13:45 -04001044 &bitmap))
1045 {
1046 p = hash_get_mem (tm->thread_registrations_by_name, name);
1047 if (p == 0)
1048 return clib_error_return (0, "no such thread type '%s'", name);
Ed Warnickecb9cada2015-12-08 15:45:58 -07001049
Dave Barach9b8ffd92016-07-08 08:13:45 -04001050 tr = (vlib_thread_registration_t *) p[0];
Ed Warnickecb9cada2015-12-08 15:45:58 -07001051
Dave Barach9b8ffd92016-07-08 08:13:45 -04001052 if (tr->use_pthreads)
1053 return clib_error_return (0,
1054 "corelist cannot be set for '%s' threads",
1055 name);
Ed Warnickecb9cada2015-12-08 15:45:58 -07001056
Dave Barach9b8ffd92016-07-08 08:13:45 -04001057 tr->coremask = bitmap;
1058 tr->count = clib_bitmap_count_set_bits (tr->coremask);
1059 }
Pavel Kotucek1e765832016-09-23 08:54:14 +02001060 else
1061 if (unformat
1062 (input, "scheduler-policy %U", unformat_sched_policy,
1063 &tm->sched_policy))
1064 ;
Pavel Kotucekc08a1ed2016-09-23 08:54:14 +02001065 else if (unformat (input, "scheduler-priority %u", &tm->sched_priority))
Pavel Kotucek1e765832016-09-23 08:54:14 +02001066 ;
Ed Warnickecb9cada2015-12-08 15:45:58 -07001067 else if (unformat (input, "%s %u", &name, &count))
Dave Barach9b8ffd92016-07-08 08:13:45 -04001068 {
1069 p = hash_get_mem (tm->thread_registrations_by_name, name);
1070 if (p == 0)
Pavel Kotucek1e765832016-09-23 08:54:14 +02001071 return clib_error_return (0, "no such thread type 3 '%s'", name);
Dave Barach9b8ffd92016-07-08 08:13:45 -04001072
1073 tr = (vlib_thread_registration_t *) p[0];
1074 if (tr->fixed_count)
1075 return clib_error_return
1076 (0, "number of %s threads not configurable", tr->name);
1077 tr->count = count;
1078 }
1079 else
1080 break;
Ed Warnickecb9cada2015-12-08 15:45:58 -07001081 }
1082
Pavel Kotucekc08a1ed2016-09-23 08:54:14 +02001083 if (tm->sched_priority != ~0)
Pavel Kotucek1e765832016-09-23 08:54:14 +02001084 {
Pavel Kotucekc08a1ed2016-09-23 08:54:14 +02001085 if (tm->sched_policy == SCHED_FIFO || tm->sched_policy == SCHED_RR)
Pavel Kotucek1e765832016-09-23 08:54:14 +02001086 {
1087 u32 prio_max = sched_get_priority_max (tm->sched_policy);
1088 u32 prio_min = sched_get_priority_min (tm->sched_policy);
1089 if (tm->sched_priority > prio_max)
1090 tm->sched_priority = prio_max;
1091 if (tm->sched_priority < prio_min)
1092 tm->sched_priority = prio_min;
1093 }
1094 else
Pavel Kotucekc08a1ed2016-09-23 08:54:14 +02001095 {
1096 return clib_error_return
1097 (0,
1098 "scheduling priority (%d) is not allowed for `normal` scheduling policy",
1099 tm->sched_priority);
1100 }
Pavel Kotucek1e765832016-09-23 08:54:14 +02001101 }
Ed Warnickecb9cada2015-12-08 15:45:58 -07001102 tr = tm->next;
1103
1104 if (!tm->thread_prefix)
Dave Barach9b8ffd92016-07-08 08:13:45 -04001105 tm->thread_prefix = format (0, "vpp");
Ed Warnickecb9cada2015-12-08 15:45:58 -07001106
1107 while (tr)
1108 {
1109 tm->n_thread_stacks += tr->count;
1110 tm->n_pthreads += tr->count * tr->use_pthreads;
Damjan Marion878c6092017-01-04 13:19:27 +01001111 tm->n_threads += tr->count * (tr->use_pthreads == 0);
Ed Warnickecb9cada2015-12-08 15:45:58 -07001112 tr = tr->next;
1113 }
1114
1115 return 0;
1116}
1117
1118VLIB_EARLY_CONFIG_FUNCTION (cpu_config, "cpu");
1119
Damjan Marion7bee80c2017-04-26 15:32:12 +02001120#if !defined (__x86_64__) && !defined (__i386__) && !defined (__aarch64__) && !defined (__powerpc64__) && !defined(__arm__)
Dave Barach9b8ffd92016-07-08 08:13:45 -04001121void
1122__sync_fetch_and_add_8 (void)
Ed Warnickecb9cada2015-12-08 15:45:58 -07001123{
Dave Barach9b8ffd92016-07-08 08:13:45 -04001124 fformat (stderr, "%s called\n", __FUNCTION__);
1125 abort ();
Ed Warnickecb9cada2015-12-08 15:45:58 -07001126}
Dave Barach9b8ffd92016-07-08 08:13:45 -04001127
1128void
1129__sync_add_and_fetch_8 (void)
Ed Warnickecb9cada2015-12-08 15:45:58 -07001130{
Dave Barach9b8ffd92016-07-08 08:13:45 -04001131 fformat (stderr, "%s called\n", __FUNCTION__);
1132 abort ();
Ed Warnickecb9cada2015-12-08 15:45:58 -07001133}
1134#endif
1135
1136void vnet_main_fixup (vlib_fork_fixup_t which) __attribute__ ((weak));
Dave Barach9b8ffd92016-07-08 08:13:45 -04001137void
1138vnet_main_fixup (vlib_fork_fixup_t which)
Ed Warnickecb9cada2015-12-08 15:45:58 -07001139{
Dave Barach9b8ffd92016-07-08 08:13:45 -04001140}
1141
1142void
1143vlib_worker_thread_fork_fixup (vlib_fork_fixup_t which)
1144{
1145 vlib_main_t *vm = vlib_get_main ();
Ed Warnickecb9cada2015-12-08 15:45:58 -07001146
1147 if (vlib_mains == 0)
1148 return;
1149
Damjan Marion586afd72017-04-05 19:18:20 +02001150 ASSERT (vlib_get_thread_index () == 0);
Dave Barach9b8ffd92016-07-08 08:13:45 -04001151 vlib_worker_thread_barrier_sync (vm);
Ed Warnickecb9cada2015-12-08 15:45:58 -07001152
1153 switch (which)
1154 {
1155 case VLIB_WORKER_THREAD_FORK_FIXUP_NEW_SW_IF_INDEX:
1156 vnet_main_fixup (VLIB_WORKER_THREAD_FORK_FIXUP_NEW_SW_IF_INDEX);
1157 break;
1158
1159 default:
Dave Barach9b8ffd92016-07-08 08:13:45 -04001160 ASSERT (0);
Ed Warnickecb9cada2015-12-08 15:45:58 -07001161 }
Dave Barach9b8ffd92016-07-08 08:13:45 -04001162 vlib_worker_thread_barrier_release (vm);
Ed Warnickecb9cada2015-12-08 15:45:58 -07001163}
1164
Dave Barach9b8ffd92016-07-08 08:13:45 -04001165void
1166vlib_worker_thread_barrier_sync (vlib_main_t * vm)
Ed Warnickecb9cada2015-12-08 15:45:58 -07001167{
1168 f64 deadline;
1169 u32 count;
Dave Barach9b8ffd92016-07-08 08:13:45 -04001170
Dave Barach80f54e22017-03-08 19:08:56 -05001171 if (vec_len (vlib_mains) < 2)
Dave Barach9b8ffd92016-07-08 08:13:45 -04001172 return;
Ed Warnickecb9cada2015-12-08 15:45:58 -07001173
1174 count = vec_len (vlib_mains) - 1;
1175
1176 /* Tolerate recursive calls */
1177 if (++vlib_worker_threads[0].recursion_level > 1)
Dave Barach9b8ffd92016-07-08 08:13:45 -04001178 return;
Ed Warnickecb9cada2015-12-08 15:45:58 -07001179
Bud Grise42f20062016-03-16 13:09:46 -04001180 vlib_worker_threads[0].barrier_sync_count++;
1181
Damjan Marion586afd72017-04-05 19:18:20 +02001182 ASSERT (vlib_get_thread_index () == 0);
Ed Warnickecb9cada2015-12-08 15:45:58 -07001183
1184 deadline = vlib_time_now (vm) + BARRIER_SYNC_TIMEOUT;
1185
1186 *vlib_worker_threads->wait_at_barrier = 1;
1187 while (*vlib_worker_threads->workers_at_barrier != count)
1188 {
Dave Barach9b8ffd92016-07-08 08:13:45 -04001189 if (vlib_time_now (vm) > deadline)
1190 {
1191 fformat (stderr, "%s: worker thread deadlock\n", __FUNCTION__);
1192 os_panic ();
1193 }
Ed Warnickecb9cada2015-12-08 15:45:58 -07001194 }
1195}
1196
Dave Barach9b8ffd92016-07-08 08:13:45 -04001197void
1198vlib_worker_thread_barrier_release (vlib_main_t * vm)
Ed Warnickecb9cada2015-12-08 15:45:58 -07001199{
1200 f64 deadline;
1201
Dave Barach80f54e22017-03-08 19:08:56 -05001202 if (vec_len (vlib_mains) < 2)
Dave Barach9b8ffd92016-07-08 08:13:45 -04001203 return;
Ed Warnickecb9cada2015-12-08 15:45:58 -07001204
1205 if (--vlib_worker_threads[0].recursion_level > 0)
1206 return;
1207
1208 deadline = vlib_time_now (vm) + BARRIER_SYNC_TIMEOUT;
1209
1210 *vlib_worker_threads->wait_at_barrier = 0;
1211
1212 while (*vlib_worker_threads->workers_at_barrier > 0)
1213 {
Dave Barach9b8ffd92016-07-08 08:13:45 -04001214 if (vlib_time_now (vm) > deadline)
1215 {
1216 fformat (stderr, "%s: worker thread deadlock\n", __FUNCTION__);
1217 os_panic ();
1218 }
Ed Warnickecb9cada2015-12-08 15:45:58 -07001219 }
1220}
1221
Damjan Marion0f8ecf02016-06-27 08:30:30 +02001222/*
1223 * Check the frame queue to see if any frames are available.
Dave Barach9b8ffd92016-07-08 08:13:45 -04001224 * If so, pull the packets off the frames and put them to
Damjan Marion0f8ecf02016-06-27 08:30:30 +02001225 * the handoff node.
1226 */
Damjan Marione9d52d52017-03-09 15:42:26 +01001227int
1228vlib_frame_queue_dequeue (vlib_main_t * vm, vlib_frame_queue_main_t * fqm)
Ed Warnickecb9cada2015-12-08 15:45:58 -07001229{
Damjan Marion586afd72017-04-05 19:18:20 +02001230 u32 thread_id = vm->thread_index;
Damjan Marionaaef1eb2016-11-08 17:37:01 +01001231 vlib_frame_queue_t *fq = fqm->vlib_frame_queues[thread_id];
Damjan Marion0f8ecf02016-06-27 08:30:30 +02001232 vlib_frame_queue_elt_t *elt;
Dave Barach9b8ffd92016-07-08 08:13:45 -04001233 u32 *from, *to;
1234 vlib_frame_t *f;
Damjan Marion0f8ecf02016-06-27 08:30:30 +02001235 int msg_type;
1236 int processed = 0;
1237 u32 n_left_to_node;
1238 u32 vectors = 0;
Ed Warnickecb9cada2015-12-08 15:45:58 -07001239
Damjan Marion0f8ecf02016-06-27 08:30:30 +02001240 ASSERT (fq);
Dave Barach9b8ffd92016-07-08 08:13:45 -04001241 ASSERT (vm == vlib_mains[thread_id]);
Ed Warnickecb9cada2015-12-08 15:45:58 -07001242
Damjan Marionaaef1eb2016-11-08 17:37:01 +01001243 if (PREDICT_FALSE (fqm->node_index == ~0))
Dave Barach9b8ffd92016-07-08 08:13:45 -04001244 return 0;
Damjan Marion0f8ecf02016-06-27 08:30:30 +02001245 /*
1246 * Gather trace data for frame queues
1247 */
Dave Barach9b8ffd92016-07-08 08:13:45 -04001248 if (PREDICT_FALSE (fq->trace))
Ed Warnickecb9cada2015-12-08 15:45:58 -07001249 {
Damjan Marion0f8ecf02016-06-27 08:30:30 +02001250 frame_queue_trace_t *fqt;
1251 frame_queue_nelt_counter_t *fqh;
1252 u32 elix;
Ed Warnickecb9cada2015-12-08 15:45:58 -07001253
Damjan Marionaaef1eb2016-11-08 17:37:01 +01001254 fqt = &fqm->frame_queue_traces[thread_id];
Ed Warnickecb9cada2015-12-08 15:45:58 -07001255
Damjan Marion0f8ecf02016-06-27 08:30:30 +02001256 fqt->nelts = fq->nelts;
1257 fqt->head = fq->head;
1258 fqt->head_hint = fq->head_hint;
1259 fqt->tail = fq->tail;
1260 fqt->threshold = fq->vector_threshold;
1261 fqt->n_in_use = fqt->tail - fqt->head;
Dave Barach9b8ffd92016-07-08 08:13:45 -04001262 if (fqt->n_in_use >= fqt->nelts)
1263 {
1264 // if beyond max then use max
1265 fqt->n_in_use = fqt->nelts - 1;
1266 }
Ed Warnickecb9cada2015-12-08 15:45:58 -07001267
Damjan Marion0f8ecf02016-06-27 08:30:30 +02001268 /* Record the number of elements in use in the histogram */
Damjan Marionaaef1eb2016-11-08 17:37:01 +01001269 fqh = &fqm->frame_queue_histogram[thread_id];
Dave Barach9b8ffd92016-07-08 08:13:45 -04001270 fqh->count[fqt->n_in_use]++;
Damjan Marion0f8ecf02016-06-27 08:30:30 +02001271
1272 /* Record a snapshot of the elements in use */
Dave Barach9b8ffd92016-07-08 08:13:45 -04001273 for (elix = 0; elix < fqt->nelts; elix++)
1274 {
1275 elt = fq->elts + ((fq->head + 1 + elix) & (fq->nelts - 1));
1276 if (1 || elt->valid)
1277 {
1278 fqt->n_vectors[elix] = elt->n_vectors;
1279 }
1280 }
Damjan Marion0f8ecf02016-06-27 08:30:30 +02001281 fqt->written = 1;
Ed Warnickecb9cada2015-12-08 15:45:58 -07001282 }
Damjan Marion0f8ecf02016-06-27 08:30:30 +02001283
1284 while (1)
1285 {
1286 if (fq->head == fq->tail)
Dave Barach9b8ffd92016-07-08 08:13:45 -04001287 {
1288 fq->head_hint = fq->head;
1289 return processed;
1290 }
Damjan Marion0f8ecf02016-06-27 08:30:30 +02001291
Dave Barach9b8ffd92016-07-08 08:13:45 -04001292 elt = fq->elts + ((fq->head + 1) & (fq->nelts - 1));
Damjan Marion0f8ecf02016-06-27 08:30:30 +02001293
1294 if (!elt->valid)
Dave Barach9b8ffd92016-07-08 08:13:45 -04001295 {
1296 fq->head_hint = fq->head;
1297 return processed;
1298 }
Damjan Marion0f8ecf02016-06-27 08:30:30 +02001299
1300 from = elt->buffer_index;
1301 msg_type = elt->msg_type;
1302
1303 ASSERT (msg_type == VLIB_FRAME_QUEUE_ELT_DISPATCH_FRAME);
1304 ASSERT (elt->n_vectors <= VLIB_FRAME_SIZE);
1305
Damjan Marionaaef1eb2016-11-08 17:37:01 +01001306 f = vlib_get_frame_to_node (vm, fqm->node_index);
Damjan Marion0f8ecf02016-06-27 08:30:30 +02001307
1308 to = vlib_frame_vector_args (f);
1309
1310 n_left_to_node = elt->n_vectors;
1311
1312 while (n_left_to_node >= 4)
Dave Barach9b8ffd92016-07-08 08:13:45 -04001313 {
1314 to[0] = from[0];
1315 to[1] = from[1];
1316 to[2] = from[2];
1317 to[3] = from[3];
1318 to += 4;
1319 from += 4;
1320 n_left_to_node -= 4;
1321 }
Damjan Marion0f8ecf02016-06-27 08:30:30 +02001322
1323 while (n_left_to_node > 0)
Dave Barach9b8ffd92016-07-08 08:13:45 -04001324 {
1325 to[0] = from[0];
1326 to++;
1327 from++;
1328 n_left_to_node--;
1329 }
Damjan Marion0f8ecf02016-06-27 08:30:30 +02001330
1331 vectors += elt->n_vectors;
1332 f->n_vectors = elt->n_vectors;
Damjan Marionaaef1eb2016-11-08 17:37:01 +01001333 vlib_put_frame_to_node (vm, fqm->node_index, f);
Damjan Marion0f8ecf02016-06-27 08:30:30 +02001334
1335 elt->valid = 0;
1336 elt->n_vectors = 0;
1337 elt->msg_type = 0xfefefefe;
Dave Barach9b8ffd92016-07-08 08:13:45 -04001338 CLIB_MEMORY_BARRIER ();
Damjan Marion0f8ecf02016-06-27 08:30:30 +02001339 fq->head++;
1340 processed++;
1341
1342 /*
1343 * Limit the number of packets pushed into the graph
1344 */
1345 if (vectors >= fq->vector_threshold)
Dave Barach9b8ffd92016-07-08 08:13:45 -04001346 {
1347 fq->head_hint = fq->head;
1348 return processed;
1349 }
Damjan Marion0f8ecf02016-06-27 08:30:30 +02001350 }
Dave Barach9b8ffd92016-07-08 08:13:45 -04001351 ASSERT (0);
Damjan Marion0f8ecf02016-06-27 08:30:30 +02001352 return processed;
1353}
1354
Dave Barach9b8ffd92016-07-08 08:13:45 -04001355void
1356vlib_worker_thread_fn (void *arg)
Damjan Marion0f8ecf02016-06-27 08:30:30 +02001357{
Dave Barach9b8ffd92016-07-08 08:13:45 -04001358 vlib_worker_thread_t *w = (vlib_worker_thread_t *) arg;
Damjan Marion878c6092017-01-04 13:19:27 +01001359 vlib_thread_main_t *tm = vlib_get_thread_main ();
Dave Barach9b8ffd92016-07-08 08:13:45 -04001360 vlib_main_t *vm = vlib_get_main ();
Damjan Marione9f929b2017-03-16 11:32:09 +01001361 clib_error_t *e;
Damjan Marion0f8ecf02016-06-27 08:30:30 +02001362
Damjan Marion586afd72017-04-05 19:18:20 +02001363 ASSERT (vm->thread_index == vlib_get_thread_index ());
Damjan Marion0f8ecf02016-06-27 08:30:30 +02001364
1365 vlib_worker_thread_init (w);
1366 clib_time_init (&vm->clib_time);
1367 clib_mem_set_heap (w->thread_mheap);
1368
Damjan Marioneb743fa2017-03-20 16:34:15 +01001369 /* Wait until the dpdk init sequence is complete */
1370 while (tm->extern_thread_mgmt && tm->worker_thread_release == 0)
1371 vlib_worker_thread_barrier_check ();
1372
Damjan Marione9f929b2017-03-16 11:32:09 +01001373 e = vlib_call_init_exit_functions
1374 (vm, vm->worker_init_function_registrations, 1 /* call_once */ );
1375 if (e)
1376 clib_error_report (e);
1377
Damjan Marione9d52d52017-03-09 15:42:26 +01001378 vlib_worker_loop (vm);
Damjan Marion0f8ecf02016-06-27 08:30:30 +02001379}
1380
Dave Barach9b8ffd92016-07-08 08:13:45 -04001381/* *INDENT-OFF* */
Damjan Marion0f8ecf02016-06-27 08:30:30 +02001382VLIB_REGISTER_THREAD (worker_thread_reg, static) = {
1383 .name = "workers",
1384 .short_name = "wk",
1385 .function = vlib_worker_thread_fn,
1386};
Dave Barach9b8ffd92016-07-08 08:13:45 -04001387/* *INDENT-ON* */
Damjan Marion0f8ecf02016-06-27 08:30:30 +02001388
Damjan Marionaaef1eb2016-11-08 17:37:01 +01001389u32
1390vlib_frame_queue_main_init (u32 node_index, u32 frame_queue_nelts)
1391{
1392 vlib_thread_main_t *tm = vlib_get_thread_main ();
1393 vlib_frame_queue_main_t *fqm;
1394 vlib_frame_queue_t *fq;
1395 int i;
1396
1397 if (frame_queue_nelts == 0)
1398 frame_queue_nelts = FRAME_QUEUE_NELTS;
1399
1400 vec_add2 (tm->frame_queue_mains, fqm, 1);
1401
1402 fqm->node_index = node_index;
1403
1404 vec_validate (fqm->vlib_frame_queues, tm->n_vlib_mains - 1);
1405 _vec_len (fqm->vlib_frame_queues) = 0;
1406 for (i = 0; i < tm->n_vlib_mains; i++)
1407 {
1408 fq = vlib_frame_queue_alloc (frame_queue_nelts);
1409 vec_add1 (fqm->vlib_frame_queues, fq);
1410 }
1411
1412 return (fqm - tm->frame_queue_mains);
1413}
1414
Damjan Marion878c6092017-01-04 13:19:27 +01001415
1416int
1417vlib_thread_cb_register (struct vlib_main_t *vm, vlib_thread_callbacks_t * cb)
1418{
1419 vlib_thread_main_t *tm = vlib_get_thread_main ();
1420
1421 if (tm->extern_thread_mgmt)
1422 return -1;
1423
1424 tm->cb.vlib_launch_thread_cb = cb->vlib_launch_thread_cb;
1425 tm->extern_thread_mgmt = 1;
1426 return 0;
1427}
1428
Dave Barach9b8ffd92016-07-08 08:13:45 -04001429clib_error_t *
1430threads_init (vlib_main_t * vm)
Damjan Marion0f8ecf02016-06-27 08:30:30 +02001431{
Ed Warnickecb9cada2015-12-08 15:45:58 -07001432 return 0;
1433}
1434
Damjan Marion0f8ecf02016-06-27 08:30:30 +02001435VLIB_INIT_FUNCTION (threads_init);
Dave Barach9b8ffd92016-07-08 08:13:45 -04001436
1437/*
1438 * fd.io coding-style-patch-verification: ON
1439 *
1440 * Local Variables:
1441 * eval: (c-set-style "gnu")
1442 * End:
1443 */