+++ /dev/null
-/*
- * Copyright (c) 2015 Cisco and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-#define _GNU_SOURCE
-
-#include <signal.h>
-#include <math.h>
-#include <vppinfra/format.h>
-#include <vlib/vlib.h>
-
-#include <vlib/threads.h>
-#include <vlib/unix/cj.h>
-
-
-#if DPDK==1
-#include <rte_config.h>
-#include <rte_common.h>
-#include <rte_eal.h>
-#include <rte_launch.h>
-#include <rte_lcore.h>
-#endif
-DECLARE_CJ_GLOBAL_LOG;
-
-#define FRAME_QUEUE_NELTS 32
-
-
-#if DPDK==1
-/*
- * Weak definitions of DPDK symbols used in this file.
- * Needed for linking test programs without DPDK libs.
- */
-unsigned __thread __attribute__ ((weak)) RTE_PER_LCORE (_lcore_id);
-struct lcore_config __attribute__ ((weak)) lcore_config[];
-unsigned __attribute__ ((weak)) rte_socket_id ();
-int __attribute__ ((weak)) rte_eal_remote_launch ();
-#endif
-u32
-vl (void *p)
-{
- return vec_len (p);
-}
-
-vlib_worker_thread_t *vlib_worker_threads;
-vlib_thread_main_t vlib_thread_main;
-
-uword
-os_get_cpu_number (void)
-{
- void *sp;
- uword n;
- u32 len;
-
- len = vec_len (vlib_thread_stacks);
- if (len == 0)
- return 0;
-
- /* Get any old stack address. */
- sp = &sp;
-
- n = ((uword) sp - (uword) vlib_thread_stacks[0])
- >> VLIB_LOG2_THREAD_STACK_SIZE;
-
- /* "processes" have their own stacks, and they always run in thread 0 */
- n = n >= len ? 0 : n;
-
- return n;
-}
-
-uword
-os_get_ncpus (void)
-{
- u32 len;
-
- len = vec_len (vlib_thread_stacks);
- if (len == 0)
- return 1;
- else
- return len;
-}
-
-void
-vlib_set_thread_name (char *name)
-{
- int pthread_setname_np (pthread_t __target_thread, const char *__name);
- int rv;
- pthread_t thread = pthread_self ();
-
- if (thread)
- {
- rv = pthread_setname_np (thread, name);
- if (rv)
- clib_warning ("pthread_setname_np returned %d", rv);
- }
-}
-
-static int
-sort_registrations_by_no_clone (void *a0, void *a1)
-{
- vlib_thread_registration_t **tr0 = a0;
- vlib_thread_registration_t **tr1 = a1;
-
- return ((i32) ((*tr0)->no_data_structure_clone)
- - ((i32) ((*tr1)->no_data_structure_clone)));
-}
-
-static uword *
-vlib_sysfs_list_to_bitmap (char *filename)
-{
- FILE *fp;
- uword *r = 0;
-
- fp = fopen (filename, "r");
-
- if (fp != NULL)
- {
- u8 *buffer = 0;
- vec_validate (buffer, 256 - 1);
- if (fgets ((char *) buffer, 256, fp))
- {
- unformat_input_t in;
- unformat_init_string (&in, (char *) buffer,
- strlen ((char *) buffer));
- if (unformat (&in, "%U", unformat_bitmap_list, &r) != 1)
- clib_warning ("unformat_bitmap_list failed");
- unformat_free (&in);
- }
- vec_free (buffer);
- fclose (fp);
- }
- return r;
-}
-
-
-/* Called early in the init sequence */
-
-clib_error_t *
-vlib_thread_init (vlib_main_t * vm)
-{
- vlib_thread_main_t *tm = &vlib_thread_main;
- vlib_worker_thread_t *w;
- vlib_thread_registration_t *tr;
- u32 n_vlib_mains = 1;
- u32 first_index = 1;
- u32 i;
- uword *avail_cpu;
-
- /* get bitmaps of active cpu cores and sockets */
- tm->cpu_core_bitmap =
- vlib_sysfs_list_to_bitmap ("/sys/devices/system/cpu/online");
- tm->cpu_socket_bitmap =
- vlib_sysfs_list_to_bitmap ("/sys/devices/system/node/online");
-
- avail_cpu = clib_bitmap_dup (tm->cpu_core_bitmap);
-
- /* skip cores */
- for (i = 0; i < tm->skip_cores; i++)
- {
- uword c = clib_bitmap_first_set (avail_cpu);
- if (c == ~0)
- return clib_error_return (0, "no available cpus to skip");
-
- avail_cpu = clib_bitmap_set (avail_cpu, c, 0);
- }
-
- /* grab cpu for main thread */
- if (!tm->main_lcore)
- {
- tm->main_lcore = clib_bitmap_first_set (avail_cpu);
- if (tm->main_lcore == (u8) ~ 0)
- return clib_error_return (0, "no available cpus to be used for the"
- " main thread");
- }
- else
- {
- if (clib_bitmap_get (avail_cpu, tm->main_lcore) == 0)
- return clib_error_return (0, "cpu %u is not available to be used"
- " for the main thread", tm->main_lcore);
- }
- avail_cpu = clib_bitmap_set (avail_cpu, tm->main_lcore, 0);
-
- /* assume that there is socket 0 only if there is no data from sysfs */
- if (!tm->cpu_socket_bitmap)
- tm->cpu_socket_bitmap = clib_bitmap_set (0, 0, 1);
-
- /* pin main thread to main_lcore */
-#if DPDK==0
- {
- cpu_set_t cpuset;
- CPU_ZERO (&cpuset);
- CPU_SET (tm->main_lcore, &cpuset);
- pthread_setaffinity_np (pthread_self (), sizeof (cpu_set_t), &cpuset);
- }
-#endif
-
- /* as many threads as stacks... */
- vec_validate_aligned (vlib_worker_threads, vec_len (vlib_thread_stacks) - 1,
- CLIB_CACHE_LINE_BYTES);
-
- /* Preallocate thread 0 */
- _vec_len (vlib_worker_threads) = 1;
- w = vlib_worker_threads;
- w->thread_mheap = clib_mem_get_heap ();
- w->thread_stack = vlib_thread_stacks[0];
- w->lcore_id = tm->main_lcore;
- w->lwp = syscall (SYS_gettid);
- w->thread_id = pthread_self ();
- tm->n_vlib_mains = 1;
-
- if (tm->sched_policy != ~0)
- {
- struct sched_param sched_param;
- if (!sched_getparam (w->lwp, &sched_param))
- {
- if (tm->sched_priority != ~0)
- sched_param.sched_priority = tm->sched_priority;
- sched_setscheduler (w->lwp, tm->sched_policy, &sched_param);
- }
- }
-
- /* assign threads to cores and set n_vlib_mains */
- tr = tm->next;
-
- while (tr)
- {
- vec_add1 (tm->registrations, tr);
- tr = tr->next;
- }
-
- vec_sort_with_function (tm->registrations, sort_registrations_by_no_clone);
-
- for (i = 0; i < vec_len (tm->registrations); i++)
- {
- int j;
- tr = tm->registrations[i];
- tr->first_index = first_index;
- first_index += tr->count;
- n_vlib_mains += (tr->no_data_structure_clone == 0) ? tr->count : 0;
-
- /* construct coremask */
- if (tr->use_pthreads || !tr->count)
- continue;
-
- if (tr->coremask)
- {
- uword c;
- /* *INDENT-OFF* */
- clib_bitmap_foreach (c, tr->coremask, ({
- if (clib_bitmap_get(avail_cpu, c) == 0)
- return clib_error_return (0, "cpu %u is not available to be used"
- " for the '%s' thread",c, tr->name);
-
- avail_cpu = clib_bitmap_set(avail_cpu, c, 0);
- }));
-/* *INDENT-ON* */
-
- }
- else
- {
- for (j = 0; j < tr->count; j++)
- {
- uword c = clib_bitmap_first_set (avail_cpu);
- if (c == ~0)
- return clib_error_return (0,
- "no available cpus to be used for"
- " the '%s' thread", tr->name);
-
- avail_cpu = clib_bitmap_set (avail_cpu, c, 0);
- tr->coremask = clib_bitmap_set (tr->coremask, c, 1);
- }
- }
- }
-
- clib_bitmap_free (avail_cpu);
-
- tm->n_vlib_mains = n_vlib_mains;
-
- vec_validate_aligned (vlib_worker_threads, first_index - 1,
- CLIB_CACHE_LINE_BYTES);
-
- return 0;
-}
-
-vlib_worker_thread_t *
-vlib_alloc_thread (vlib_main_t * vm)
-{
- vlib_worker_thread_t *w;
-
- if (vec_len (vlib_worker_threads) >= vec_len (vlib_thread_stacks))
- {
- clib_warning ("out of worker threads... Quitting...");
- exit (1);
- }
- vec_add2 (vlib_worker_threads, w, 1);
- w->thread_stack = vlib_thread_stacks[w - vlib_worker_threads];
- return w;
-}
-
-vlib_frame_queue_t *
-vlib_frame_queue_alloc (int nelts)
-{
- vlib_frame_queue_t *fq;
-
- fq = clib_mem_alloc_aligned (sizeof (*fq), CLIB_CACHE_LINE_BYTES);
- memset (fq, 0, sizeof (*fq));
- fq->nelts = nelts;
- fq->vector_threshold = 128; // packets
- vec_validate_aligned (fq->elts, nelts - 1, CLIB_CACHE_LINE_BYTES);
-
- if (1)
- {
- if (((uword) & fq->tail) & (CLIB_CACHE_LINE_BYTES - 1))
- fformat (stderr, "WARNING: fq->tail unaligned\n");
- if (((uword) & fq->head) & (CLIB_CACHE_LINE_BYTES - 1))
- fformat (stderr, "WARNING: fq->head unaligned\n");
- if (((uword) fq->elts) & (CLIB_CACHE_LINE_BYTES - 1))
- fformat (stderr, "WARNING: fq->elts unaligned\n");
-
- if (sizeof (fq->elts[0]) % CLIB_CACHE_LINE_BYTES)
- fformat (stderr, "WARNING: fq->elts[0] size %d\n",
- sizeof (fq->elts[0]));
- if (nelts & (nelts - 1))
- {
- fformat (stderr, "FATAL: nelts MUST be a power of 2\n");
- abort ();
- }
- }
-
- return (fq);
-}
-
-void vl_msg_api_handler_no_free (void *) __attribute__ ((weak));
-void
-vl_msg_api_handler_no_free (void *v)
-{
-}
-
-/* Turned off, save as reference material... */
-#if 0
-static inline int
-vlib_frame_queue_dequeue_internal (int thread_id,
- vlib_main_t * vm, vlib_node_main_t * nm)
-{
- vlib_frame_queue_t *fq = vlib_frame_queues[thread_id];
- vlib_frame_queue_elt_t *elt;
- vlib_frame_t *f;
- vlib_pending_frame_t *p;
- vlib_node_runtime_t *r;
- u32 node_runtime_index;
- int msg_type;
- u64 before;
- int processed = 0;
-
- ASSERT (vm == vlib_mains[thread_id]);
-
- while (1)
- {
- if (fq->head == fq->tail)
- return processed;
-
- elt = fq->elts + ((fq->head + 1) & (fq->nelts - 1));
-
- if (!elt->valid)
- return processed;
-
- before = clib_cpu_time_now ();
-
- f = elt->frame;
- node_runtime_index = elt->node_runtime_index;
- msg_type = elt->msg_type;
-
- switch (msg_type)
- {
- case VLIB_FRAME_QUEUE_ELT_FREE_BUFFERS:
- vlib_buffer_free (vm, vlib_frame_vector_args (f), f->n_vectors);
- /* note fallthrough... */
- case VLIB_FRAME_QUEUE_ELT_FREE_FRAME:
- r = vec_elt_at_index (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL],
- node_runtime_index);
- vlib_frame_free (vm, r, f);
- break;
- case VLIB_FRAME_QUEUE_ELT_DISPATCH_FRAME:
- vec_add2 (vm->node_main.pending_frames, p, 1);
- f->flags |= (VLIB_FRAME_PENDING | VLIB_FRAME_FREE_AFTER_DISPATCH);
- p->node_runtime_index = elt->node_runtime_index;
- p->frame_index = vlib_frame_index (vm, f);
- p->next_frame_index = VLIB_PENDING_FRAME_NO_NEXT_FRAME;
- fq->dequeue_vectors += (u64) f->n_vectors;
- break;
- case VLIB_FRAME_QUEUE_ELT_API_MSG:
- vl_msg_api_handler_no_free (f);
- break;
- default:
- clib_warning ("bogus frame queue message, type %d", msg_type);
- break;
- }
- elt->valid = 0;
- fq->dequeues++;
- fq->dequeue_ticks += clib_cpu_time_now () - before;
- CLIB_MEMORY_BARRIER ();
- fq->head++;
- processed++;
- }
- ASSERT (0);
- return processed;
-}
-
-int
-vlib_frame_queue_dequeue (int thread_id,
- vlib_main_t * vm, vlib_node_main_t * nm)
-{
- return vlib_frame_queue_dequeue_internal (thread_id, vm, nm);
-}
-
-int
-vlib_frame_queue_enqueue (vlib_main_t * vm, u32 node_runtime_index,
- u32 frame_queue_index, vlib_frame_t * frame,
- vlib_frame_queue_msg_type_t type)
-{
- vlib_frame_queue_t *fq = vlib_frame_queues[frame_queue_index];
- vlib_frame_queue_elt_t *elt;
- u32 save_count;
- u64 new_tail;
- u64 before = clib_cpu_time_now ();
-
- ASSERT (fq);
-
- new_tail = __sync_add_and_fetch (&fq->tail, 1);
-
- /* Wait until a ring slot is available */
- while (new_tail >= fq->head + fq->nelts)
- {
- f64 b4 = vlib_time_now_ticks (vm, before);
- vlib_worker_thread_barrier_check (vm, b4);
- /* Bad idea. Dequeue -> enqueue -> dequeue -> trouble */
- // vlib_frame_queue_dequeue (vm->cpu_index, vm, nm);
- }
-
- elt = fq->elts + (new_tail & (fq->nelts - 1));
-
- /* this would be very bad... */
- while (elt->valid)
- {
- }
-
- /* Once we enqueue the frame, frame->n_vectors is owned elsewhere... */
- save_count = frame->n_vectors;
-
- elt->frame = frame;
- elt->node_runtime_index = node_runtime_index;
- elt->msg_type = type;
- CLIB_MEMORY_BARRIER ();
- elt->valid = 1;
-
- return save_count;
-}
-#endif /* 0 */
-
-/* To be called by vlib worker threads upon startup */
-void
-vlib_worker_thread_init (vlib_worker_thread_t * w)
-{
- vlib_thread_main_t *tm = vlib_get_thread_main ();
-
- /*
- * Note: disabling signals in worker threads as follows
- * prevents the api post-mortem dump scheme from working
- * {
- * sigset_t s;
- * sigfillset (&s);
- * pthread_sigmask (SIG_SETMASK, &s, 0);
- * }
- */
-
- clib_mem_set_heap (w->thread_mheap);
-
- if (vec_len (tm->thread_prefix) && w->registration->short_name)
- {
- w->name = format (0, "%v_%s_%d%c", tm->thread_prefix,
- w->registration->short_name, w->instance_id, '\0');
- vlib_set_thread_name ((char *) w->name);
- }
-
- if (!w->registration->use_pthreads)
- {
-
- /* Initial barrier sync, for both worker and i/o threads */
- clib_smp_atomic_add (vlib_worker_threads->workers_at_barrier, 1);
-
- while (*vlib_worker_threads->wait_at_barrier)
- ;
-
- clib_smp_atomic_add (vlib_worker_threads->workers_at_barrier, -1);
- }
-}
-
-void *
-vlib_worker_thread_bootstrap_fn (void *arg)
-{
- void *rv;
- vlib_worker_thread_t *w = arg;
-
- w->lwp = syscall (SYS_gettid);
- w->thread_id = pthread_self ();
-
- rv = (void *) clib_calljmp
- ((uword (*)(uword)) w->thread_function,
- (uword) arg, w->thread_stack + VLIB_THREAD_STACK_SIZE);
- /* NOTREACHED, we hope */
- return rv;
-}
-
-static int
-vlib_launch_thread (void *fp, vlib_worker_thread_t * w, unsigned lcore_id)
-{
- void *(*fp_arg) (void *) = fp;
-
- w->lcore_id = lcore_id;
-#if DPDK==1
- if (!w->registration->use_pthreads)
- if (rte_eal_remote_launch) /* do we have dpdk linked */
- return rte_eal_remote_launch (fp, (void *) w, lcore_id);
- else
- return -1;
- else
-#endif
- {
- int ret;
- pthread_t worker;
- cpu_set_t cpuset;
- CPU_ZERO (&cpuset);
- CPU_SET (lcore_id, &cpuset);
-
- ret = pthread_create (&worker, NULL /* attr */ , fp_arg, (void *) w);
- if (ret == 0)
- return pthread_setaffinity_np (worker, sizeof (cpu_set_t), &cpuset);
- else
- return ret;
- }
-}
-
-static clib_error_t *
-start_workers (vlib_main_t * vm)
-{
- int i, j;
- vlib_worker_thread_t *w;
- vlib_main_t *vm_clone;
- void *oldheap;
- vlib_thread_main_t *tm = &vlib_thread_main;
- vlib_thread_registration_t *tr;
- vlib_node_runtime_t *rt;
- u32 n_vlib_mains = tm->n_vlib_mains;
- u32 worker_thread_index;
- u8 *main_heap = clib_mem_get_per_cpu_heap ();
- mheap_t *main_heap_header = mheap_header (main_heap);
-
- vec_reset_length (vlib_worker_threads);
-
- /* Set up the main thread */
- vec_add2_aligned (vlib_worker_threads, w, 1, CLIB_CACHE_LINE_BYTES);
- w->elog_track.name = "main thread";
- elog_track_register (&vm->elog_main, &w->elog_track);
-
- if (vec_len (tm->thread_prefix))
- {
- w->name = format (0, "%v_main%c", tm->thread_prefix, '\0');
- vlib_set_thread_name ((char *) w->name);
- }
-
- /*
- * Truth of the matter: we always use at least two
- * threads. So, make the main heap thread-safe
- * and make the event log thread-safe.
- */
- main_heap_header->flags |= MHEAP_FLAG_THREAD_SAFE;
- vm->elog_main.lock =
- clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES, CLIB_CACHE_LINE_BYTES);
- vm->elog_main.lock[0] = 0;
-
- if (n_vlib_mains > 1)
- {
- vec_validate (vlib_mains, tm->n_vlib_mains - 1);
- _vec_len (vlib_mains) = 0;
- vec_add1 (vlib_mains, vm);
-
- vlib_worker_threads->wait_at_barrier =
- clib_mem_alloc_aligned (sizeof (u32), CLIB_CACHE_LINE_BYTES);
- vlib_worker_threads->workers_at_barrier =
- clib_mem_alloc_aligned (sizeof (u32), CLIB_CACHE_LINE_BYTES);
-
- /* Ask for an initial barrier sync */
- *vlib_worker_threads->workers_at_barrier = 0;
- *vlib_worker_threads->wait_at_barrier = 1;
-
- worker_thread_index = 1;
-
- for (i = 0; i < vec_len (tm->registrations); i++)
- {
- vlib_node_main_t *nm, *nm_clone;
- vlib_buffer_main_t *bm_clone;
- vlib_buffer_free_list_t *fl_clone, *fl_orig;
- vlib_buffer_free_list_t *orig_freelist_pool;
- int k;
-
- tr = tm->registrations[i];
-
- if (tr->count == 0)
- continue;
-
- for (k = 0; k < tr->count; k++)
- {
- vec_add2 (vlib_worker_threads, w, 1);
- if (tr->mheap_size)
- w->thread_mheap =
- mheap_alloc (0 /* use VM */ , tr->mheap_size);
- else
- w->thread_mheap = main_heap;
- w->thread_stack = vlib_thread_stacks[w - vlib_worker_threads];
- w->thread_function = tr->function;
- w->thread_function_arg = w;
- w->instance_id = k;
- w->registration = tr;
-
- w->elog_track.name =
- (char *) format (0, "%s %d", tr->name, k + 1);
- vec_add1 (w->elog_track.name, 0);
- elog_track_register (&vm->elog_main, &w->elog_track);
-
- if (tr->no_data_structure_clone)
- continue;
-
- /* Fork vlib_global_main et al. Look for bugs here */
- oldheap = clib_mem_set_heap (w->thread_mheap);
-
- vm_clone = clib_mem_alloc (sizeof (*vm_clone));
- clib_memcpy (vm_clone, vlib_mains[0], sizeof (*vm_clone));
-
- vm_clone->cpu_index = worker_thread_index;
- vm_clone->heap_base = w->thread_mheap;
- vm_clone->mbuf_alloc_list = 0;
- memset (&vm_clone->random_buffer, 0,
- sizeof (vm_clone->random_buffer));
-
- nm = &vlib_mains[0]->node_main;
- nm_clone = &vm_clone->node_main;
- /* fork next frames array, preserving node runtime indices */
- nm_clone->next_frames = vec_dup (nm->next_frames);
- for (j = 0; j < vec_len (nm_clone->next_frames); j++)
- {
- vlib_next_frame_t *nf = &nm_clone->next_frames[j];
- u32 save_node_runtime_index;
- u32 save_flags;
-
- save_node_runtime_index = nf->node_runtime_index;
- save_flags = nf->flags & VLIB_FRAME_NO_FREE_AFTER_DISPATCH;
- vlib_next_frame_init (nf);
- nf->node_runtime_index = save_node_runtime_index;
- nf->flags = save_flags;
- }
-
- /* fork the frame dispatch queue */
- nm_clone->pending_frames = 0;
- vec_validate (nm_clone->pending_frames, 10); /* $$$$$?????? */
- _vec_len (nm_clone->pending_frames) = 0;
-
- /* fork nodes */
- nm_clone->nodes = 0;
- for (j = 0; j < vec_len (nm->nodes); j++)
- {
- vlib_node_t *n;
- n = clib_mem_alloc_no_fail (sizeof (*n));
- clib_memcpy (n, nm->nodes[j], sizeof (*n));
- /* none of the copied nodes have enqueue rights given out */
- n->owner_node_index = VLIB_INVALID_NODE_INDEX;
- memset (&n->stats_total, 0, sizeof (n->stats_total));
- memset (&n->stats_last_clear, 0,
- sizeof (n->stats_last_clear));
- vec_add1 (nm_clone->nodes, n);
- }
- nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL] =
- vec_dup (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL]);
-
- nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT] =
- vec_dup (nm->nodes_by_type[VLIB_NODE_TYPE_INPUT]);
- vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT])
- rt->cpu_index = vm_clone->cpu_index;
-
- nm_clone->processes = vec_dup (nm->processes);
-
- /* zap the (per worker) frame freelists, etc */
- nm_clone->frame_sizes = 0;
- nm_clone->frame_size_hash = 0;
-
- /* Packet trace buffers are guaranteed to be empty, nothing to do here */
-
- clib_mem_set_heap (oldheap);
- vec_add1 (vlib_mains, vm_clone);
-
- vm_clone->error_main.counters =
- vec_dup (vlib_mains[0]->error_main.counters);
- vm_clone->error_main.counters_last_clear =
- vec_dup (vlib_mains[0]->error_main.counters_last_clear);
-
- /* Fork the vlib_buffer_main_t free lists, etc. */
- bm_clone = vec_dup (vm_clone->buffer_main);
- vm_clone->buffer_main = bm_clone;
-
- orig_freelist_pool = bm_clone->buffer_free_list_pool;
- bm_clone->buffer_free_list_pool = 0;
-
- /* *INDENT-OFF* */
- pool_foreach (fl_orig, orig_freelist_pool,
- ({
- pool_get_aligned (bm_clone->buffer_free_list_pool,
- fl_clone, CLIB_CACHE_LINE_BYTES);
- ASSERT (fl_orig - orig_freelist_pool
- == fl_clone - bm_clone->buffer_free_list_pool);
-
- fl_clone[0] = fl_orig[0];
- fl_clone->aligned_buffers = 0;
- fl_clone->unaligned_buffers = 0;
- fl_clone->n_alloc = 0;
- }));
-/* *INDENT-ON* */
-
- worker_thread_index++;
- }
- }
- }
- else
- {
- /* only have non-data-structure copy threads to create... */
- for (i = 0; i < vec_len (tm->registrations); i++)
- {
- tr = tm->registrations[i];
-
- for (j = 0; j < tr->count; j++)
- {
- vec_add2 (vlib_worker_threads, w, 1);
- if (tr->mheap_size)
- w->thread_mheap =
- mheap_alloc (0 /* use VM */ , tr->mheap_size);
- else
- w->thread_mheap = main_heap;
- w->thread_stack = vlib_thread_stacks[w - vlib_worker_threads];
- w->thread_function = tr->function;
- w->thread_function_arg = w;
- w->instance_id = j;
- w->elog_track.name =
- (char *) format (0, "%s %d", tr->name, j + 1);
- w->registration = tr;
- vec_add1 (w->elog_track.name, 0);
- elog_track_register (&vm->elog_main, &w->elog_track);
- }
- }
- }
-
- worker_thread_index = 1;
-
- for (i = 0; i < vec_len (tm->registrations); i++)
- {
- int j;
-
- tr = tm->registrations[i];
-
- if (tr->use_pthreads || tm->use_pthreads)
- {
- for (j = 0; j < tr->count; j++)
- {
- w = vlib_worker_threads + worker_thread_index++;
- if (vlib_launch_thread (vlib_worker_thread_bootstrap_fn, w, 0) <
- 0)
- clib_warning ("Couldn't start '%s' pthread ", tr->name);
- }
- }
- else
- {
- uword c;
- /* *INDENT-OFF* */
- clib_bitmap_foreach (c, tr->coremask, ({
- w = vlib_worker_threads + worker_thread_index++;
- if (vlib_launch_thread (vlib_worker_thread_bootstrap_fn, w, c) < 0)
- clib_warning ("Couldn't start DPDK lcore %d", c);
-
- }));
-/* *INDENT-ON* */
- }
- }
- vlib_worker_thread_barrier_sync (vm);
- vlib_worker_thread_barrier_release (vm);
- return 0;
-}
-
-VLIB_MAIN_LOOP_ENTER_FUNCTION (start_workers);
-
-void
-vlib_worker_thread_node_runtime_update (void)
-{
- int i, j;
- vlib_worker_thread_t *w;
- vlib_main_t *vm;
- vlib_node_main_t *nm, *nm_clone;
- vlib_node_t **old_nodes_clone;
- vlib_main_t *vm_clone;
- vlib_node_runtime_t *rt, *old_rt;
- void *oldheap;
- never_inline void
- vlib_node_runtime_sync_stats (vlib_main_t * vm,
- vlib_node_runtime_t * r,
- uword n_calls,
- uword n_vectors, uword n_clocks);
-
- ASSERT (os_get_cpu_number () == 0);
-
- if (vec_len (vlib_mains) == 0)
- return;
-
- vm = vlib_mains[0];
- nm = &vm->node_main;
-
- ASSERT (os_get_cpu_number () == 0);
- ASSERT (*vlib_worker_threads->wait_at_barrier == 1);
-
- /*
- * Scrape all runtime stats, so we don't lose node runtime(s) with
- * pending counts, or throw away worker / io thread counts.
- */
- for (j = 0; j < vec_len (nm->nodes); j++)
- {
- vlib_node_t *n;
- n = nm->nodes[j];
- vlib_node_sync_stats (vm, n);
- }
-
- for (i = 1; i < vec_len (vlib_mains); i++)
- {
- vlib_node_t *n;
-
- vm_clone = vlib_mains[i];
- nm_clone = &vm_clone->node_main;
-
- for (j = 0; j < vec_len (nm_clone->nodes); j++)
- {
- n = nm_clone->nodes[j];
-
- rt = vlib_node_get_runtime (vm_clone, n->index);
- vlib_node_runtime_sync_stats (vm_clone, rt, 0, 0, 0);
- }
- }
-
- for (i = 1; i < vec_len (vlib_mains); i++)
- {
- vlib_node_runtime_t *rt;
- w = vlib_worker_threads + i;
- oldheap = clib_mem_set_heap (w->thread_mheap);
-
- vm_clone = vlib_mains[i];
-
- /* Re-clone error heap */
- u64 *old_counters = vm_clone->error_main.counters;
- u64 *old_counters_all_clear = vm_clone->error_main.counters_last_clear;
- clib_memcpy (&vm_clone->error_main, &vm->error_main,
- sizeof (vm->error_main));
- j = vec_len (vm->error_main.counters) - 1;
- vec_validate_aligned (old_counters, j, CLIB_CACHE_LINE_BYTES);
- vec_validate_aligned (old_counters_all_clear, j, CLIB_CACHE_LINE_BYTES);
- vm_clone->error_main.counters = old_counters;
- vm_clone->error_main.counters_last_clear = old_counters_all_clear;
-
- nm_clone = &vm_clone->node_main;
- vec_free (nm_clone->next_frames);
- nm_clone->next_frames = vec_dup (nm->next_frames);
-
- for (j = 0; j < vec_len (nm_clone->next_frames); j++)
- {
- vlib_next_frame_t *nf = &nm_clone->next_frames[j];
- u32 save_node_runtime_index;
- u32 save_flags;
-
- save_node_runtime_index = nf->node_runtime_index;
- save_flags = nf->flags & VLIB_FRAME_NO_FREE_AFTER_DISPATCH;
- vlib_next_frame_init (nf);
- nf->node_runtime_index = save_node_runtime_index;
- nf->flags = save_flags;
- }
-
- old_nodes_clone = nm_clone->nodes;
- nm_clone->nodes = 0;
-
- /* re-fork nodes */
- for (j = 0; j < vec_len (nm->nodes); j++)
- {
- vlib_node_t *old_n_clone;
- vlib_node_t *new_n, *new_n_clone;
-
- new_n = nm->nodes[j];
- old_n_clone = old_nodes_clone[j];
-
- new_n_clone = clib_mem_alloc_no_fail (sizeof (*new_n_clone));
- clib_memcpy (new_n_clone, new_n, sizeof (*new_n));
- /* none of the copied nodes have enqueue rights given out */
- new_n_clone->owner_node_index = VLIB_INVALID_NODE_INDEX;
-
- if (j >= vec_len (old_nodes_clone))
- {
- /* new node, set to zero */
- memset (&new_n_clone->stats_total, 0,
- sizeof (new_n_clone->stats_total));
- memset (&new_n_clone->stats_last_clear, 0,
- sizeof (new_n_clone->stats_last_clear));
- }
- else
- {
- /* Copy stats if the old data is valid */
- clib_memcpy (&new_n_clone->stats_total,
- &old_n_clone->stats_total,
- sizeof (new_n_clone->stats_total));
- clib_memcpy (&new_n_clone->stats_last_clear,
- &old_n_clone->stats_last_clear,
- sizeof (new_n_clone->stats_last_clear));
-
- /* keep previous node state */
- new_n_clone->state = old_n_clone->state;
- }
- vec_add1 (nm_clone->nodes, new_n_clone);
- }
- /* Free the old node clone */
- for (j = 0; j < vec_len (old_nodes_clone); j++)
- clib_mem_free (old_nodes_clone[j]);
- vec_free (old_nodes_clone);
-
- vec_free (nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL]);
-
- nm_clone->nodes_by_type[VLIB_NODE_TYPE_INTERNAL] =
- vec_dup (nm->nodes_by_type[VLIB_NODE_TYPE_INTERNAL]);
-
- /* clone input node runtime */
- old_rt = nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT];
-
- nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT] =
- vec_dup (nm->nodes_by_type[VLIB_NODE_TYPE_INPUT]);
-
- vec_foreach (rt, nm_clone->nodes_by_type[VLIB_NODE_TYPE_INPUT])
- {
- rt->cpu_index = vm_clone->cpu_index;
- }
-
- for (j = 0; j < vec_len (old_rt); j++)
- {
- rt = vlib_node_get_runtime (vm_clone, old_rt[j].node_index);
- rt->state = old_rt[j].state;
- }
-
- vec_free (old_rt);
-
- nm_clone->processes = vec_dup (nm->processes);
-
- clib_mem_set_heap (oldheap);
-
- // vnet_main_fork_fixup (i);
- }
-}
-
-u32
-unformat_sched_policy (unformat_input_t * input, va_list * args)
-{
- u32 *r = va_arg (*args, u32 *);
-
- if (0);
-#define _(v,f,s) else if (unformat (input, s)) *r = SCHED_POLICY_##f;
- foreach_sched_policy
-#undef _
- else
- return 0;
- return 1;
-}
-
-static clib_error_t *
-cpu_config (vlib_main_t * vm, unformat_input_t * input)
-{
- vlib_thread_registration_t *tr;
- uword *p;
- vlib_thread_main_t *tm = &vlib_thread_main;
- u8 *name;
- u64 coremask;
- uword *bitmap;
- u32 count;
-
- tm->thread_registrations_by_name = hash_create_string (0, sizeof (uword));
-
- tm->n_thread_stacks = 1; /* account for main thread */
- tm->sched_policy = ~0;
- tm->sched_priority = ~0;
-
- tr = tm->next;
-
- while (tr)
- {
- hash_set_mem (tm->thread_registrations_by_name, tr->name, (uword) tr);
- tr = tr->next;
- }
-
- while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
- {
- if (unformat (input, "use-pthreads"))
- tm->use_pthreads = 1;
- else if (unformat (input, "thread-prefix %v", &tm->thread_prefix))
- ;
- else if (unformat (input, "main-core %u", &tm->main_lcore))
- ;
- else if (unformat (input, "skip-cores %u", &tm->skip_cores))
- ;
- else if (unformat (input, "coremask-%s %llx", &name, &coremask))
- {
- p = hash_get_mem (tm->thread_registrations_by_name, name);
- if (p == 0)
- return clib_error_return (0, "no such thread type '%s'", name);
-
- tr = (vlib_thread_registration_t *) p[0];
-
- if (tr->use_pthreads)
- return clib_error_return (0,
- "coremask cannot be set for '%s' threads",
- name);
-
- tr->coremask = clib_bitmap_set_multiple
- (tr->coremask, 0, coremask, BITS (coremask));
- tr->count = clib_bitmap_count_set_bits (tr->coremask);
- }
- else if (unformat (input, "corelist-%s %U", &name, unformat_bitmap_list,
- &bitmap))
- {
- p = hash_get_mem (tm->thread_registrations_by_name, name);
- if (p == 0)
- return clib_error_return (0, "no such thread type '%s'", name);
-
- tr = (vlib_thread_registration_t *) p[0];
-
- if (tr->use_pthreads)
- return clib_error_return (0,
- "corelist cannot be set for '%s' threads",
- name);
-
- tr->coremask = bitmap;
- tr->count = clib_bitmap_count_set_bits (tr->coremask);
- }
- else
- if (unformat
- (input, "scheduler-policy %U", unformat_sched_policy,
- &tm->sched_policy))
- ;
- else if (unformat (input, "scheduler-priority %u", &tm->sched_priority))
- ;
- else if (unformat (input, "%s %u", &name, &count))
- {
- p = hash_get_mem (tm->thread_registrations_by_name, name);
- if (p == 0)
- return clib_error_return (0, "no such thread type 3 '%s'", name);
-
- tr = (vlib_thread_registration_t *) p[0];
- if (tr->fixed_count)
- return clib_error_return
- (0, "number of %s threads not configurable", tr->name);
- tr->count = count;
- }
- else
- break;
- }
-
- if (tm->sched_priority != ~0)
- {
- if (tm->sched_policy == SCHED_FIFO || tm->sched_policy == SCHED_RR)
- {
- u32 prio_max = sched_get_priority_max (tm->sched_policy);
- u32 prio_min = sched_get_priority_min (tm->sched_policy);
- if (tm->sched_priority > prio_max)
- tm->sched_priority = prio_max;
- if (tm->sched_priority < prio_min)
- tm->sched_priority = prio_min;
- }
- else
- {
- return clib_error_return
- (0,
- "scheduling priority (%d) is not allowed for `normal` scheduling policy",
- tm->sched_priority);
- }
- }
- tr = tm->next;
-
- if (!tm->thread_prefix)
- tm->thread_prefix = format (0, "vpp");
-
- while (tr)
- {
- tm->n_thread_stacks += tr->count;
- tm->n_pthreads += tr->count * tr->use_pthreads;
- tm->n_eal_threads += tr->count * (tr->use_pthreads == 0);
- tr = tr->next;
- }
-
- return 0;
-}
-
-VLIB_EARLY_CONFIG_FUNCTION (cpu_config, "cpu");
-
-#if !defined (__x86_64__) && !defined (__aarch64__) && !defined (__powerpc64__) && !defined(__arm__)
-void
-__sync_fetch_and_add_8 (void)
-{
- fformat (stderr, "%s called\n", __FUNCTION__);
- abort ();
-}
-
-void
-__sync_add_and_fetch_8 (void)
-{
- fformat (stderr, "%s called\n", __FUNCTION__);
- abort ();
-}
-#endif
-
-void vnet_main_fixup (vlib_fork_fixup_t which) __attribute__ ((weak));
-void
-vnet_main_fixup (vlib_fork_fixup_t which)
-{
-}
-
-void
-vlib_worker_thread_fork_fixup (vlib_fork_fixup_t which)
-{
- vlib_main_t *vm = vlib_get_main ();
-
- if (vlib_mains == 0)
- return;
-
- ASSERT (os_get_cpu_number () == 0);
- vlib_worker_thread_barrier_sync (vm);
-
- switch (which)
- {
- case VLIB_WORKER_THREAD_FORK_FIXUP_NEW_SW_IF_INDEX:
- vnet_main_fixup (VLIB_WORKER_THREAD_FORK_FIXUP_NEW_SW_IF_INDEX);
- break;
-
- default:
- ASSERT (0);
- }
- vlib_worker_thread_barrier_release (vm);
-}
-
-void
-vlib_worker_thread_barrier_sync (vlib_main_t * vm)
-{
- f64 deadline;
- u32 count;
-
- if (!vlib_mains)
- return;
-
- count = vec_len (vlib_mains) - 1;
-
- /* Tolerate recursive calls */
- if (++vlib_worker_threads[0].recursion_level > 1)
- return;
-
- vlib_worker_threads[0].barrier_sync_count++;
-
- ASSERT (os_get_cpu_number () == 0);
-
- deadline = vlib_time_now (vm) + BARRIER_SYNC_TIMEOUT;
-
- *vlib_worker_threads->wait_at_barrier = 1;
- while (*vlib_worker_threads->workers_at_barrier != count)
- {
- if (vlib_time_now (vm) > deadline)
- {
- fformat (stderr, "%s: worker thread deadlock\n", __FUNCTION__);
- os_panic ();
- }
- }
-}
-
-void
-vlib_worker_thread_barrier_release (vlib_main_t * vm)
-{
- f64 deadline;
-
- if (!vlib_mains)
- return;
-
- if (--vlib_worker_threads[0].recursion_level > 0)
- return;
-
- deadline = vlib_time_now (vm) + BARRIER_SYNC_TIMEOUT;
-
- *vlib_worker_threads->wait_at_barrier = 0;
-
- while (*vlib_worker_threads->workers_at_barrier > 0)
- {
- if (vlib_time_now (vm) > deadline)
- {
- fformat (stderr, "%s: worker thread deadlock\n", __FUNCTION__);
- os_panic ();
- }
- }
-}
-
-/*
- * Check the frame queue to see if any frames are available.
- * If so, pull the packets off the frames and put them to
- * the handoff node.
- */
-static inline int
-vlib_frame_queue_dequeue_internal (vlib_main_t * vm,
- vlib_frame_queue_main_t * fqm)
-{
- u32 thread_id = vm->cpu_index;
- vlib_frame_queue_t *fq = fqm->vlib_frame_queues[thread_id];
- vlib_frame_queue_elt_t *elt;
- u32 *from, *to;
- vlib_frame_t *f;
- int msg_type;
- int processed = 0;
- u32 n_left_to_node;
- u32 vectors = 0;
-
- ASSERT (fq);
- ASSERT (vm == vlib_mains[thread_id]);
-
- if (PREDICT_FALSE (fqm->node_index == ~0))
- return 0;
- /*
- * Gather trace data for frame queues
- */
- if (PREDICT_FALSE (fq->trace))
- {
- frame_queue_trace_t *fqt;
- frame_queue_nelt_counter_t *fqh;
- u32 elix;
-
- fqt = &fqm->frame_queue_traces[thread_id];
-
- fqt->nelts = fq->nelts;
- fqt->head = fq->head;
- fqt->head_hint = fq->head_hint;
- fqt->tail = fq->tail;
- fqt->threshold = fq->vector_threshold;
- fqt->n_in_use = fqt->tail - fqt->head;
- if (fqt->n_in_use >= fqt->nelts)
- {
- // if beyond max then use max
- fqt->n_in_use = fqt->nelts - 1;
- }
-
- /* Record the number of elements in use in the histogram */
- fqh = &fqm->frame_queue_histogram[thread_id];
- fqh->count[fqt->n_in_use]++;
-
- /* Record a snapshot of the elements in use */
- for (elix = 0; elix < fqt->nelts; elix++)
- {
- elt = fq->elts + ((fq->head + 1 + elix) & (fq->nelts - 1));
- if (1 || elt->valid)
- {
- fqt->n_vectors[elix] = elt->n_vectors;
- }
- }
- fqt->written = 1;
- }
-
- while (1)
- {
- if (fq->head == fq->tail)
- {
- fq->head_hint = fq->head;
- return processed;
- }
-
- elt = fq->elts + ((fq->head + 1) & (fq->nelts - 1));
-
- if (!elt->valid)
- {
- fq->head_hint = fq->head;
- return processed;
- }
-
- from = elt->buffer_index;
- msg_type = elt->msg_type;
-
- ASSERT (msg_type == VLIB_FRAME_QUEUE_ELT_DISPATCH_FRAME);
- ASSERT (elt->n_vectors <= VLIB_FRAME_SIZE);
-
- f = vlib_get_frame_to_node (vm, fqm->node_index);
-
- to = vlib_frame_vector_args (f);
-
- n_left_to_node = elt->n_vectors;
-
- while (n_left_to_node >= 4)
- {
- to[0] = from[0];
- to[1] = from[1];
- to[2] = from[2];
- to[3] = from[3];
- to += 4;
- from += 4;
- n_left_to_node -= 4;
- }
-
- while (n_left_to_node > 0)
- {
- to[0] = from[0];
- to++;
- from++;
- n_left_to_node--;
- }
-
- vectors += elt->n_vectors;
- f->n_vectors = elt->n_vectors;
- vlib_put_frame_to_node (vm, fqm->node_index, f);
-
- elt->valid = 0;
- elt->n_vectors = 0;
- elt->msg_type = 0xfefefefe;
- CLIB_MEMORY_BARRIER ();
- fq->head++;
- processed++;
-
- /*
- * Limit the number of packets pushed into the graph
- */
- if (vectors >= fq->vector_threshold)
- {
- fq->head_hint = fq->head;
- return processed;
- }
- }
- ASSERT (0);
- return processed;
-}
-
-static_always_inline void
-vlib_worker_thread_internal (vlib_main_t * vm)
-{
- vlib_node_main_t *nm = &vm->node_main;
- vlib_thread_main_t *tm = vlib_get_thread_main ();
- u64 cpu_time_now = clib_cpu_time_now ();
- vlib_frame_queue_main_t *fqm;
-
- vec_alloc (nm->pending_interrupt_node_runtime_indices, 32);
-
- while (1)
- {
- vlib_worker_thread_barrier_check ();
-
- vec_foreach (fqm, tm->frame_queue_mains)
- vlib_frame_queue_dequeue_internal (vm, fqm);
-
- vlib_node_runtime_t *n;
- vec_foreach (n, nm->nodes_by_type[VLIB_NODE_TYPE_INPUT])
- {
- cpu_time_now = dispatch_node (vm, n, VLIB_NODE_TYPE_INPUT,
- VLIB_NODE_STATE_POLLING, /* frame */ 0,
- cpu_time_now);
- }
-
- /* Next handle interrupts. */
- {
- uword l = _vec_len (nm->pending_interrupt_node_runtime_indices);
- uword i;
- if (l > 0)
- {
- _vec_len (nm->pending_interrupt_node_runtime_indices) = 0;
- for (i = 0; i < l; i++)
- {
- n = vec_elt_at_index (nm->nodes_by_type[VLIB_NODE_TYPE_INPUT],
- nm->
- pending_interrupt_node_runtime_indices
- [i]);
- cpu_time_now =
- dispatch_node (vm, n, VLIB_NODE_TYPE_INPUT,
- VLIB_NODE_STATE_INTERRUPT,
- /* frame */ 0,
- cpu_time_now);
- }
- }
- }
-
- if (_vec_len (nm->pending_frames))
- {
- int i;
- cpu_time_now = clib_cpu_time_now ();
- for (i = 0; i < _vec_len (nm->pending_frames); i++)
- {
- vlib_pending_frame_t *p;
-
- p = nm->pending_frames + i;
-
- cpu_time_now = dispatch_pending_node (vm, p, cpu_time_now);
- }
- _vec_len (nm->pending_frames) = 0;
- }
- vlib_increment_main_loop_counter (vm);
-
- /* Record time stamp in case there are no enabled nodes and above
- calls do not update time stamp. */
- cpu_time_now = clib_cpu_time_now ();
- }
-}
-
-void
-vlib_worker_thread_fn (void *arg)
-{
- vlib_worker_thread_t *w = (vlib_worker_thread_t *) arg;
- vlib_main_t *vm = vlib_get_main ();
-
- ASSERT (vm->cpu_index == os_get_cpu_number ());
-
- vlib_worker_thread_init (w);
- clib_time_init (&vm->clib_time);
- clib_mem_set_heap (w->thread_mheap);
-
-#if DPDK > 0
- /* Wait until the dpdk init sequence is complete */
- vlib_thread_main_t *tm = vlib_get_thread_main ();
- while (tm->worker_thread_release == 0)
- vlib_worker_thread_barrier_check ();
-#endif
-
- vlib_worker_thread_internal (vm);
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_THREAD (worker_thread_reg, static) = {
- .name = "workers",
- .short_name = "wk",
- .function = vlib_worker_thread_fn,
-};
-/* *INDENT-ON* */
-
-u32
-vlib_frame_queue_main_init (u32 node_index, u32 frame_queue_nelts)
-{
- vlib_thread_main_t *tm = vlib_get_thread_main ();
- vlib_frame_queue_main_t *fqm;
- vlib_frame_queue_t *fq;
- int i;
-
- if (frame_queue_nelts == 0)
- frame_queue_nelts = FRAME_QUEUE_NELTS;
-
- vec_add2 (tm->frame_queue_mains, fqm, 1);
-
- fqm->node_index = node_index;
-
- vec_validate (fqm->vlib_frame_queues, tm->n_vlib_mains - 1);
- _vec_len (fqm->vlib_frame_queues) = 0;
- for (i = 0; i < tm->n_vlib_mains; i++)
- {
- fq = vlib_frame_queue_alloc (frame_queue_nelts);
- vec_add1 (fqm->vlib_frame_queues, fq);
- }
-
- return (fqm - tm->frame_queue_mains);
-}
-
-clib_error_t *
-threads_init (vlib_main_t * vm)
-{
- return 0;
-}
-
-VLIB_INIT_FUNCTION (threads_init);
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
Code Review / vpp.git / blobdiff