Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1 | /* |
| 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 | */ |
| 15 | /* |
| 16 | * main.h: VLIB main data structure |
| 17 | * |
| 18 | * Copyright (c) 2008 Eliot Dresselhaus |
| 19 | * |
| 20 | * Permission is hereby granted, free of charge, to any person obtaining |
| 21 | * a copy of this software and associated documentation files (the |
| 22 | * "Software"), to deal in the Software without restriction, including |
| 23 | * without limitation the rights to use, copy, modify, merge, publish, |
| 24 | * distribute, sublicense, and/or sell copies of the Software, and to |
| 25 | * permit persons to whom the Software is furnished to do so, subject to |
| 26 | * the following conditions: |
| 27 | * |
| 28 | * The above copyright notice and this permission notice shall be |
| 29 | * included in all copies or substantial portions of the Software. |
| 30 | * |
| 31 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 32 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 33 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 34 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE |
| 35 | * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION |
| 36 | * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
| 37 | * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 38 | */ |
| 39 | |
| 40 | #ifndef included_vlib_main_h |
| 41 | #define included_vlib_main_h |
| 42 | |
| 43 | #include <vppinfra/elog.h> |
| 44 | #include <vppinfra/format.h> |
| 45 | #include <vppinfra/longjmp.h> |
| 46 | #include <vppinfra/pool.h> |
| 47 | #include <vppinfra/random_buffer.h> |
| 48 | #include <vppinfra/time.h> |
| 49 | |
| 50 | #include <pthread.h> |
| 51 | |
| 52 | |
| 53 | /* By default turn off node/error event logging. |
| 54 | Override with -DVLIB_ELOG_MAIN_LOOP */ |
| 55 | #ifndef VLIB_ELOG_MAIN_LOOP |
| 56 | #define VLIB_ELOG_MAIN_LOOP 0 |
| 57 | #endif |
| 58 | |
Dave Barach | 9b8ffd9 | 2016-07-08 08:13:45 -0400 | [diff] [blame] | 59 | typedef struct vlib_main_t |
| 60 | { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 61 | /* Instruction level timing state. */ |
| 62 | clib_time_t clib_time; |
| 63 | |
| 64 | /* Time stamp of last node dispatch. */ |
| 65 | u64 cpu_time_last_node_dispatch; |
| 66 | |
| 67 | /* Time stamp when main loop was entered (time 0). */ |
| 68 | u64 cpu_time_main_loop_start; |
| 69 | |
| 70 | /* Incremented once for each main loop. */ |
| 71 | u32 main_loop_count; |
| 72 | |
| 73 | /* Count of vectors processed this main loop. */ |
| 74 | u32 main_loop_vectors_processed; |
| 75 | u32 main_loop_nodes_processed; |
| 76 | |
| 77 | /* Circular buffer of input node vector counts. |
| 78 | Indexed by low bits of |
| 79 | (main_loop_count >> VLIB_LOG2_INPUT_VECTORS_PER_MAIN_LOOP). */ |
| 80 | u32 vector_counts_per_main_loop[2]; |
| 81 | u32 node_counts_per_main_loop[2]; |
| 82 | |
| 83 | /* Every so often we switch to the next counter. */ |
| 84 | #define VLIB_LOG2_MAIN_LOOPS_PER_STATS_UPDATE 7 |
| 85 | |
| 86 | /* Jump target to exit main loop with given code. */ |
| 87 | u32 main_loop_exit_set; |
| 88 | clib_longjmp_t main_loop_exit; |
| 89 | #define VLIB_MAIN_LOOP_EXIT_NONE 0 |
| 90 | #define VLIB_MAIN_LOOP_EXIT_PANIC 1 |
| 91 | /* Exit via CLI. */ |
| 92 | #define VLIB_MAIN_LOOP_EXIT_CLI 2 |
| 93 | |
| 94 | /* Error marker to use when exiting main loop. */ |
Dave Barach | 9b8ffd9 | 2016-07-08 08:13:45 -0400 | [diff] [blame] | 95 | clib_error_t *main_loop_error; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 96 | |
| 97 | /* Name for e.g. syslog. */ |
Dave Barach | 9b8ffd9 | 2016-07-08 08:13:45 -0400 | [diff] [blame] | 98 | char *name; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 99 | |
| 100 | /* Start and size of CLIB heap. */ |
Dave Barach | 9b8ffd9 | 2016-07-08 08:13:45 -0400 | [diff] [blame] | 101 | void *heap_base; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 102 | uword heap_size; |
| 103 | |
Dave Barach | 9b8ffd9 | 2016-07-08 08:13:45 -0400 | [diff] [blame] | 104 | vlib_buffer_main_t *buffer_main; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 105 | |
| 106 | vlib_physmem_main_t physmem_main; |
| 107 | |
| 108 | /* Allocate/free buffer memory for DMA transfers, descriptor rings, etc. |
| 109 | buffer memory is guaranteed to be cache-aligned. */ |
Dave Barach | 9b8ffd9 | 2016-07-08 08:13:45 -0400 | [diff] [blame] | 110 | void *(*os_physmem_alloc_aligned) (vlib_physmem_main_t * pm, |
| 111 | uword n_bytes, uword alignment); |
| 112 | void (*os_physmem_free) (void *x); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 113 | |
| 114 | /* Node graph main structure. */ |
| 115 | vlib_node_main_t node_main; |
| 116 | |
| 117 | /* Command line interface. */ |
| 118 | vlib_cli_main_t cli_main; |
| 119 | |
| 120 | /* Packet trace buffer. */ |
| 121 | vlib_trace_main_t trace_main; |
| 122 | |
| 123 | /* Error handling. */ |
| 124 | vlib_error_main_t error_main; |
| 125 | |
| 126 | /* Punt packets to underlying operating system for when fast switching |
| 127 | code does not know what to do. */ |
Dave Barach | 9b8ffd9 | 2016-07-08 08:13:45 -0400 | [diff] [blame] | 128 | void (*os_punt_frame) (struct vlib_main_t * vm, |
| 129 | struct vlib_node_runtime_t * node, |
| 130 | vlib_frame_t * frame); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 131 | |
| 132 | /* Multicast distribution. Set to zero for MC disabled. */ |
Dave Barach | 9b8ffd9 | 2016-07-08 08:13:45 -0400 | [diff] [blame] | 133 | mc_main_t *mc_main; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 134 | |
| 135 | /* Stream index to use for distribution when MC is enabled. */ |
| 136 | u32 mc_stream_index; |
| 137 | |
Dave Barach | 9b8ffd9 | 2016-07-08 08:13:45 -0400 | [diff] [blame] | 138 | vlib_one_time_waiting_process_t *procs_waiting_for_mc_stream_join; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 139 | |
| 140 | /* Event logger. */ |
| 141 | elog_main_t elog_main; |
| 142 | |
| 143 | /* Node call and return event types. */ |
Dave Barach | 9b8ffd9 | 2016-07-08 08:13:45 -0400 | [diff] [blame] | 144 | elog_event_type_t *node_call_elog_event_types; |
| 145 | elog_event_type_t *node_return_elog_event_types; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 146 | |
Dave Barach | 9b8ffd9 | 2016-07-08 08:13:45 -0400 | [diff] [blame] | 147 | elog_event_type_t *error_elog_event_types; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 148 | |
| 149 | /* Seed for random number generator. */ |
| 150 | uword random_seed; |
| 151 | |
| 152 | /* Buffer of random data for various uses. */ |
| 153 | clib_random_buffer_t random_buffer; |
| 154 | |
| 155 | /* Hash table to record which init functions have been called. */ |
Dave Barach | 9b8ffd9 | 2016-07-08 08:13:45 -0400 | [diff] [blame] | 156 | uword *init_functions_called; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 157 | |
| 158 | /* to compare with node runtime */ |
Damjan Marion | 586afd7 | 2017-04-05 19:18:20 +0200 | [diff] [blame] | 159 | u32 thread_index; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 160 | |
| 161 | void **mbuf_alloc_list; |
| 162 | |
| 163 | /* List of init functions to call, setup by constructors */ |
| 164 | _vlib_init_function_list_elt_t *init_function_registrations; |
Damjan Marion | e9f929b | 2017-03-16 11:32:09 +0100 | [diff] [blame] | 165 | _vlib_init_function_list_elt_t *worker_init_function_registrations; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 166 | _vlib_init_function_list_elt_t *main_loop_enter_function_registrations; |
| 167 | _vlib_init_function_list_elt_t *main_loop_exit_function_registrations; |
| 168 | _vlib_init_function_list_elt_t *api_init_function_registrations; |
| 169 | vlib_config_function_runtime_t *config_function_registrations; |
Dave Barach | 9b8ffd9 | 2016-07-08 08:13:45 -0400 | [diff] [blame] | 170 | mc_serialize_msg_t *mc_msg_registrations; /* mc_main is a pointer... */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 171 | |
Dave Barach | dae88b9 | 2016-04-19 09:38:35 -0400 | [diff] [blame] | 172 | /* control-plane API queue signal pending, length indication */ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 173 | volatile u32 queue_signal_pending; |
Dave Barach | dae88b9 | 2016-04-19 09:38:35 -0400 | [diff] [blame] | 174 | volatile u32 api_queue_nonempty; |
Dave Barach | 9b8ffd9 | 2016-07-08 08:13:45 -0400 | [diff] [blame] | 175 | void (*queue_signal_callback) (struct vlib_main_t *); |
Dave Barach | bfdedbd | 2016-01-20 09:11:55 -0500 | [diff] [blame] | 176 | u8 **argv; |
Damjan Marion | ce359db | 2017-03-16 16:15:38 +0100 | [diff] [blame] | 177 | |
| 178 | /* debugging */ |
| 179 | volatile int parked_at_barrier; |
Dave Barach | 8148131 | 2017-05-16 09:08:14 -0400 | [diff] [blame^] | 180 | |
| 181 | /* Attempt to do a post-mortem elog dump */ |
| 182 | int elog_post_mortem_dump; |
| 183 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 184 | } vlib_main_t; |
| 185 | |
| 186 | /* Global main structure. */ |
Damjan Marion | 6a7acc2 | 2016-12-19 16:28:36 +0100 | [diff] [blame] | 187 | extern vlib_main_t vlib_global_main; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 188 | |
Damjan Marion | e9d52d5 | 2017-03-09 15:42:26 +0100 | [diff] [blame] | 189 | void vlib_worker_loop (vlib_main_t * vm); |
| 190 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 191 | always_inline f64 |
| 192 | vlib_time_now (vlib_main_t * vm) |
Dave Barach | 9b8ffd9 | 2016-07-08 08:13:45 -0400 | [diff] [blame] | 193 | { |
| 194 | return clib_time_now (&vm->clib_time); |
| 195 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 196 | |
| 197 | always_inline f64 |
| 198 | vlib_time_now_ticks (vlib_main_t * vm, u64 n) |
Dave Barach | 9b8ffd9 | 2016-07-08 08:13:45 -0400 | [diff] [blame] | 199 | { |
| 200 | return clib_time_now_internal (&vm->clib_time, n); |
| 201 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 202 | |
| 203 | /* Busy wait for specified time. */ |
| 204 | always_inline void |
| 205 | vlib_time_wait (vlib_main_t * vm, f64 wait) |
| 206 | { |
| 207 | f64 t = vlib_time_now (vm); |
| 208 | f64 limit = t + wait; |
| 209 | while (t < limit) |
| 210 | t = vlib_time_now (vm); |
| 211 | } |
| 212 | |
| 213 | /* Time a piece of code. */ |
| 214 | #define vlib_time_code(vm,body) \ |
| 215 | do { \ |
| 216 | f64 _t[2]; \ |
| 217 | _t[0] = vlib_time_now (vm); \ |
| 218 | do { body; } while (0); \ |
| 219 | _t[1] = vlib_time_now (vm); \ |
| 220 | clib_warning ("%.7e", _t[1] - _t[0]); \ |
| 221 | } while (0) |
| 222 | |
| 223 | #define vlib_wait_with_timeout(vm,suspend_time,timeout_time,test) \ |
| 224 | ({ \ |
| 225 | uword __vlib_wait_with_timeout = 0; \ |
| 226 | f64 __vlib_wait_time = 0; \ |
| 227 | while (! (__vlib_wait_with_timeout = (test)) \ |
| 228 | && __vlib_wait_time < (timeout_time)) \ |
| 229 | { \ |
| 230 | vlib_process_suspend (vm, suspend_time); \ |
| 231 | __vlib_wait_time += suspend_time; \ |
| 232 | } \ |
| 233 | __vlib_wait_with_timeout; \ |
| 234 | }) |
| 235 | |
| 236 | always_inline void |
| 237 | vlib_panic_with_error (vlib_main_t * vm, clib_error_t * error) |
| 238 | { |
| 239 | vm->main_loop_error = error; |
| 240 | clib_longjmp (&vm->main_loop_exit, VLIB_MAIN_LOOP_EXIT_PANIC); |
| 241 | } |
| 242 | |
| 243 | #define vlib_panic_with_msg(vm,args...) \ |
| 244 | vlib_panic_with_error (vm, clib_error_return (0, args)) |
| 245 | |
| 246 | always_inline void |
| 247 | vlib_panic (vlib_main_t * vm) |
Dave Barach | 9b8ffd9 | 2016-07-08 08:13:45 -0400 | [diff] [blame] | 248 | { |
| 249 | vlib_panic_with_error (vm, 0); |
| 250 | } |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 251 | |
| 252 | always_inline u32 |
| 253 | vlib_vector_input_stats_index (vlib_main_t * vm, word delta) |
| 254 | { |
| 255 | u32 i; |
| 256 | i = vm->main_loop_count >> VLIB_LOG2_MAIN_LOOPS_PER_STATS_UPDATE; |
| 257 | ASSERT (is_pow2 (ARRAY_LEN (vm->vector_counts_per_main_loop))); |
| 258 | return (i + delta) & (ARRAY_LEN (vm->vector_counts_per_main_loop) - 1); |
| 259 | } |
| 260 | |
| 261 | /* Estimate input rate based on previous |
| 262 | 2^VLIB_LOG2_MAIN_LOOPS_PER_STATS_UPDATE |
| 263 | samples. */ |
| 264 | always_inline u32 |
| 265 | vlib_last_vectors_per_main_loop (vlib_main_t * vm) |
| 266 | { |
| 267 | u32 i = vlib_vector_input_stats_index (vm, -1); |
| 268 | u32 n = vm->vector_counts_per_main_loop[i]; |
| 269 | return n >> VLIB_LOG2_MAIN_LOOPS_PER_STATS_UPDATE; |
| 270 | } |
| 271 | |
| 272 | /* Total ave vector count per iteration of main loop. */ |
| 273 | always_inline f64 |
| 274 | vlib_last_vectors_per_main_loop_as_f64 (vlib_main_t * vm) |
| 275 | { |
| 276 | u32 i = vlib_vector_input_stats_index (vm, -1); |
| 277 | u32 v = vm->vector_counts_per_main_loop[i]; |
| 278 | return (f64) v / (f64) (1 << VLIB_LOG2_MAIN_LOOPS_PER_STATS_UPDATE); |
| 279 | } |
| 280 | |
| 281 | /* Total ave vectors/node count per iteration of main loop. */ |
| 282 | always_inline f64 |
| 283 | vlib_last_vector_length_per_node (vlib_main_t * vm) |
| 284 | { |
| 285 | u32 i = vlib_vector_input_stats_index (vm, -1); |
| 286 | u32 v = vm->vector_counts_per_main_loop[i]; |
| 287 | u32 n = vm->node_counts_per_main_loop[i]; |
| 288 | return n == 0 ? 0 : (f64) v / (f64) n; |
| 289 | } |
| 290 | |
Damjan Marion | 6a7acc2 | 2016-12-19 16:28:36 +0100 | [diff] [blame] | 291 | extern u32 wraps; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 292 | |
| 293 | always_inline void |
| 294 | vlib_increment_main_loop_counter (vlib_main_t * vm) |
| 295 | { |
| 296 | u32 i, c, n, v, is_wrap; |
| 297 | |
| 298 | c = vm->main_loop_count++; |
| 299 | |
| 300 | is_wrap = (c & pow2_mask (VLIB_LOG2_MAIN_LOOPS_PER_STATS_UPDATE)) == 0; |
| 301 | |
| 302 | if (is_wrap) |
Dave Barach | 9b8ffd9 | 2016-07-08 08:13:45 -0400 | [diff] [blame] | 303 | wraps++; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 304 | |
| 305 | i = vlib_vector_input_stats_index (vm, /* delta */ is_wrap); |
| 306 | |
| 307 | v = is_wrap ? 0 : vm->vector_counts_per_main_loop[i]; |
| 308 | n = is_wrap ? 0 : vm->node_counts_per_main_loop[i]; |
| 309 | |
| 310 | v += vm->main_loop_vectors_processed; |
| 311 | n += vm->main_loop_nodes_processed; |
| 312 | vm->main_loop_vectors_processed = 0; |
| 313 | vm->main_loop_nodes_processed = 0; |
| 314 | vm->vector_counts_per_main_loop[i] = v; |
| 315 | vm->node_counts_per_main_loop[i] = n; |
| 316 | } |
| 317 | |
Dave Barach | 9b8ffd9 | 2016-07-08 08:13:45 -0400 | [diff] [blame] | 318 | always_inline void vlib_set_queue_signal_callback |
| 319 | (vlib_main_t * vm, void (*fp) (vlib_main_t *)) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 320 | { |
| 321 | vm->queue_signal_callback = fp; |
| 322 | } |
| 323 | |
| 324 | /* Main routine. */ |
| 325 | int vlib_main (vlib_main_t * vm, unformat_input_t * input); |
| 326 | |
Damjan Marion | f55f9b8 | 2017-05-10 21:06:28 +0200 | [diff] [blame] | 327 | /* Thread stacks, for os_get_thread_index */ |
Damjan Marion | 6a7acc2 | 2016-12-19 16:28:36 +0100 | [diff] [blame] | 328 | extern u8 **vlib_thread_stacks; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 329 | |
| 330 | /* Number of thread stacks that the application needs */ |
| 331 | u32 vlib_app_num_thread_stacks_needed (void) __attribute__ ((weak)); |
| 332 | |
Dave Barach | 6931f59 | 2016-05-13 12:55:01 -0400 | [diff] [blame] | 333 | extern void vlib_node_sync_stats (vlib_main_t * vm, vlib_node_t * n); |
| 334 | |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 335 | #endif /* included_vlib_main_h */ |
Dave Barach | 9b8ffd9 | 2016-07-08 08:13:45 -0400 | [diff] [blame] | 336 | |
| 337 | /* |
| 338 | * fd.io coding-style-patch-verification: ON |
| 339 | * |
| 340 | * Local Variables: |
| 341 | * eval: (c-set-style "gnu") |
| 342 | * End: |
| 343 | */ |