2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
15 #ifndef included_vlib_threads_h
16 #define included_vlib_threads_h
18 #include <vlib/main.h>
20 vlib_main_t **vlib_mains;
23 vlib_set_thread_name (char *name);
25 /* arg is actually a vlib__thread_t * */
26 typedef void (vlib_thread_function_t) (void * arg);
28 typedef struct vlib_thread_registration_ {
29 /* constructor generated list of thread registrations */
30 struct vlib_thread_registration_ * next;
32 /* config parameters */
35 vlib_thread_function_t * function;
39 int no_data_structure_clone;
40 /* All threads of this type run on pthreads */
44 } vlib_thread_registration_t;
47 * Frames have their cpu / vlib_main_t index in the low-order N bits
48 * Make VLIB_MAX_CPUS a power-of-two, please...
51 #define VLIB_MAX_CPUS 256
53 #if VLIB_MAX_CPUS > CLIB_MAX_MHEAPS
54 #error Please increase number of per-cpu mheaps
57 #define VLIB_CPU_MASK (VLIB_MAX_CPUS - 1) /* 0x3f, max */
58 #define VLIB_OFFSET_MASK (~VLIB_CPU_MASK)
60 #define VLIB_LOG2_THREAD_STACK_SIZE (20)
61 #define VLIB_THREAD_STACK_SIZE (1<<VLIB_LOG2_THREAD_STACK_SIZE)
64 VLIB_FRAME_QUEUE_ELT_DISPATCH_FRAME,
65 } vlib_frame_queue_msg_type_t;
73 /* 256 * 4 = 1024 bytes, even mult of cache line size */
74 u32 buffer_index[VLIB_FRAME_SIZE];
76 /* Pad to a cache line boundary */
77 u8 pad[CLIB_CACHE_LINE_BYTES - 4 * sizeof(u32)];
78 } vlib_frame_queue_elt_t;
81 /* First cache line */
82 volatile u32 *wait_at_barrier;
83 volatile u32 *workers_at_barrier;
84 u8 pad0[CLIB_CACHE_LINE_BYTES - (2 * sizeof (u32 *))];
86 /* Second Cache Line */
89 void (*thread_function)(void *);
90 void * thread_function_arg;
92 elog_track_t elog_track;
94 vlib_thread_registration_t *registration;
99 } vlib_worker_thread_t;
101 vlib_worker_thread_t *vlib_worker_threads;
109 u32 enqueue_full_events;
110 u32 enqueue_efd_discards;
111 u8 pad2[CLIB_CACHE_LINE_BYTES
113 - (4 * sizeof(u64))];
121 u64 vector_threshold;
122 u8 pad4[CLIB_CACHE_LINE_BYTES
123 - (6 * sizeof(u64))];
125 /* dequeue hint to enqueue side */
126 volatile u64 head_hint;
127 u8 pad5 [CLIB_CACHE_LINE_BYTES - sizeof(u64)];
129 /* read-only, constant, shared */
130 vlib_frame_queue_elt_t *elts;
132 } vlib_frame_queue_t;
134 vlib_frame_queue_t **vlib_frame_queues;
136 /* Called early, in thread 0's context */
137 clib_error_t * vlib_thread_init (vlib_main_t * vm);
139 vlib_worker_thread_t * vlib_alloc_thread (vlib_main_t * vm);
141 int vlib_frame_queue_enqueue (vlib_main_t *vm, u32 node_runtime_index,
142 u32 frame_queue_index, vlib_frame_t *frame,
143 vlib_frame_queue_msg_type_t type);
145 int vlib_frame_queue_dequeue (int thread_id,
147 vlib_node_main_t *nm);
149 u64 dispatch_node (vlib_main_t * vm,
150 vlib_node_runtime_t * node,
151 vlib_node_type_t type,
152 vlib_node_state_t dispatch_state,
153 vlib_frame_t * frame,
154 u64 last_time_stamp);
156 u64 dispatch_pending_node (vlib_main_t * vm,
157 vlib_pending_frame_t * p,
158 u64 last_time_stamp);
160 void vlib_worker_thread_node_runtime_update(void);
162 void vlib_create_worker_threads (vlib_main_t *vm, int n,
163 void (*thread_function)(void *));
165 void vlib_worker_thread_init (vlib_worker_thread_t * w);
167 /* Check for a barrier sync request every 30ms */
168 #define BARRIER_SYNC_DELAY (0.030000)
171 /* long barrier timeout, for gdb... */
172 #define BARRIER_SYNC_TIMEOUT (600.1)
174 #define BARRIER_SYNC_TIMEOUT (1.0)
177 void vlib_worker_thread_barrier_sync(vlib_main_t *vm);
178 void vlib_worker_thread_barrier_release(vlib_main_t *vm);
180 always_inline void vlib_smp_unsafe_warning (void)
184 if (os_get_cpu_number())
185 fformat(stderr, "%s: SMP unsafe warning...\n", __FUNCTION__);
190 VLIB_WORKER_THREAD_FORK_FIXUP_ILLEGAL = 0,
191 VLIB_WORKER_THREAD_FORK_FIXUP_NEW_SW_IF_INDEX,
194 void vlib_worker_thread_fork_fixup (vlib_fork_fixup_t which);
196 static inline void vlib_worker_thread_barrier_check (void)
198 if (PREDICT_FALSE(*vlib_worker_threads->wait_at_barrier))
200 clib_smp_atomic_add (vlib_worker_threads->workers_at_barrier, 1);
201 while (*vlib_worker_threads->wait_at_barrier)
203 clib_smp_atomic_add (vlib_worker_threads->workers_at_barrier, -1);
207 #define foreach_vlib_main(body) \
209 vlib_main_t ** __vlib_mains = 0, *this_vlib_main; \
212 if (vec_len (vlib_mains) == 0) \
213 vec_add1 (__vlib_mains, &vlib_global_main); \
216 for (ii = 0; ii < vec_len (vlib_mains); ii++) \
218 this_vlib_main = vlib_mains[ii]; \
219 if (this_vlib_main) \
220 vec_add1 (__vlib_mains, this_vlib_main); \
224 for (ii = 0; ii < vec_len (__vlib_mains); ii++) \
226 this_vlib_main = __vlib_mains[ii]; \
227 /* body uses this_vlib_main... */ \
230 vec_free (__vlib_mains); \
234 /* Early-Fast-Discard (EFD) */
235 #define VLIB_EFD_DISABLED 0
236 #define VLIB_EFD_DISCARD_ENABLED (1 << 0)
237 #define VLIB_EFD_MONITOR_ENABLED (1 << 1)
239 #define VLIB_EFD_DEF_WORKER_HI_THRESH_PCT 90
241 /* EFD worker thread settings */
242 typedef struct vlib_efd_t {
252 /* Link list of registrations, built by constructors */
253 vlib_thread_registration_t * next;
255 /* Vector of registrations, w/ non-data-structure clones at the top */
256 vlib_thread_registration_t ** registrations;
258 uword * thread_registrations_by_name;
260 vlib_worker_thread_t * worker_threads;
262 /* thread / cpu / io thread parameters */
263 u32 main_thread_is_io_node;
266 * Launch all threads as pthreads,
267 * not eal_rte_launch (strict affinity) threads
271 /* Number of vlib_main / vnet_main clones */
274 /* Number of thread stacks to create */
277 /* Number of pthreads */
280 /* Number of DPDK eal threads */
283 /* Number of cores to skip, must match the core mask */
286 /* Thread prefix name */
289 /* main thread lcore */
292 /* Bitmap of available CPU cores */
293 uword * cpu_core_bitmap;
295 /* Bitmap of available CPU sockets (NUMA nodes) */
296 uword * cpu_socket_bitmap;
300 } vlib_thread_main_t;
302 vlib_thread_main_t vlib_thread_main;
304 #define VLIB_REGISTER_THREAD(x,...) \
305 __VA_ARGS__ vlib_thread_registration_t x; \
306 static void __vlib_add_thread_registration_##x (void) \
307 __attribute__((__constructor__)) ; \
308 static void __vlib_add_thread_registration_##x (void) \
310 vlib_thread_main_t * tm = &vlib_thread_main; \
314 __VA_ARGS__ vlib_thread_registration_t x
316 #endif /* included_vlib_threads_h */