| /* |
| * 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 <sched.h> |
| |
| #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); |
| } |
| |
| void debug_hex_bytes (u8 *s, u32 n) |
| { |
| fformat (stderr, "%U\n", format_hex_bytes, s, n); |
| } |
| |
| 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; |
| } |
| |
| void |
| vlib_set_thread_name (char *name) |
| { |
| int pthread_setname_np (pthread_t __target_thread, const char *__name); |
| pthread_t thread = pthread_self(); |
| |
| if (thread) |
| pthread_setname_np(thread, name); |
| } |
| |
| 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)); |
| unformat(&in, "%U", unformat_bitmap_list, &r); |
| 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->dpdk_lcore_id = -1; |
| w->lwp = syscall(SYS_gettid); |
| tm->n_vlib_mains = 1; |
| |
| /* 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; |
| 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); |
| })); |
| |
| } |
| 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); |
| |
| |
| tm->efd.enabled = VLIB_EFD_DISABLED; |
| tm->efd.queue_hi_thresh = ((VLIB_EFD_DEF_WORKER_HI_THRESH_PCT * |
| FRAME_QUEUE_NELTS)/100); |
| 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(); |
| |
| /* worker threads wants no signals. */ |
| { |
| 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->dpdk_lcore_id = -1; |
| #if DPDK==1 |
| if (w->registration && !w->registration->use_pthreads && |
| rte_socket_id) /* do we really have dpdk linked */ |
| { |
| unsigned lcore = rte_lcore_id(); |
| lcore = lcore < RTE_MAX_LCORE ? lcore : -1; |
| w->dpdk_lcore_id = lcore; |
| } |
| #endif |
| |
| 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; |
| |
| #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_frame_queue_t *fq; |
| 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); |
| } |
| |
| #if DPDK==1 |
| w->dpdk_lcore_id = -1; |
| if (rte_socket_id) /* do we really have dpdk linked */ |
| { |
| unsigned lcore = rte_lcore_id(); |
| w->dpdk_lcore_id = lcore < RTE_MAX_LCORE ? lcore : -1;; |
| } |
| #endif |
| |
| /* |
| * 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); |
| |
| vec_validate (vlib_frame_queues, tm->n_vlib_mains - 1); |
| _vec_len (vlib_frame_queues) = 0; |
| fq = vlib_frame_queue_alloc (FRAME_QUEUE_NELTS); |
| vec_add1 (vlib_frame_queues, fq); |
| |
| 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; |
| |
| /* Allocate "to-worker-N" frame queue */ |
| if (tr->frame_queue_nelts) { |
| fq = vlib_frame_queue_alloc (tr->frame_queue_nelts); |
| } else { |
| fq = vlib_frame_queue_alloc (FRAME_QUEUE_NELTS); |
| } |
| |
| vec_validate (vlib_frame_queues, worker_thread_index); |
| vlib_frame_queues[worker_thread_index] = fq; |
| |
| /* 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; |
| |
| 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; |
| })); |
| |
| 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; |
| 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); |
| |
| })); |
| } |
| } |
| 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); |
| } |
| } |
| |
| 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 */ |
| |
| 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, "main-thread-io")) |
| tm->main_thread_is_io_node = 1; |
| else 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, "%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 '%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; |
| } |
| |
| 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(); |
| } |
| } |
| } |
| |
| static clib_error_t * |
| show_threads_fn (vlib_main_t * vm, |
| unformat_input_t * input, |
| vlib_cli_command_t * cmd) |
| { |
| vlib_worker_thread_t * w; |
| int i; |
| |
| vlib_cli_output (vm, "%-7s%-20s%-12s%-8s%-7s%-7s%-7s%-10s", |
| "ID", "Name", "Type", "LWP", |
| "lcore", "Core", "Socket", "State"); |
| |
| #if !defined(__powerpc64__) |
| for (i = 0; i < vec_len(vlib_worker_threads); i++) |
| { |
| w = vlib_worker_threads + i; |
| u8 * line = NULL; |
| |
| line = format(line, "%-7d%-20s%-12s%-8d", |
| i, |
| w->name ? w->name : (u8 *) "", |
| w->registration ? w->registration->name : "", |
| w->lwp); |
| |
| #if DPDK==1 |
| int lcore = w->dpdk_lcore_id; |
| if (lcore > -1) |
| { |
| line = format(line, "%-7u%-7u%-7u", |
| lcore, |
| lcore_config[lcore].core_id, |
| lcore_config[lcore].socket_id); |
| |
| switch(lcore_config[lcore].state) |
| { |
| case WAIT: |
| line = format(line, "wait"); |
| break; |
| case RUNNING: |
| line = format(line, "running"); |
| break; |
| case FINISHED: |
| line = format(line, "finished"); |
| break; |
| default: |
| line = format(line, "unknown"); |
| } |
| } |
| #endif |
| vlib_cli_output(vm, "%v", line); |
| vec_free(line); |
| } |
| #endif |
| |
| return 0; |
| } |
| |
| |
| VLIB_CLI_COMMAND (show_threads_command, static) = { |
| .path = "show threads", |
| .short_help = "Show threads", |
| .function = show_threads_fn, |
| }; |