Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2016 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 | #include <vnet/fib/fib_walk.h> |
| 17 | #include <vnet/fib/fib_node_list.h> |
| 18 | |
Neale Ranns | 710071b | 2018-09-24 12:36:26 +0000 | [diff] [blame] | 19 | vlib_log_class_t fib_walk_logger; |
| 20 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 21 | /** |
| 22 | * The flags on a walk |
| 23 | */ |
| 24 | typedef enum fib_walk_flags_t_ |
| 25 | { |
| 26 | /** |
| 27 | * A synchronous walk. |
| 28 | * This walk will run to completion, i.e. visit ALL the children. |
| 29 | * It is a depth first traversal of the graph. |
| 30 | */ |
| 31 | FIB_WALK_FLAG_SYNC = (1 << 0), |
| 32 | /** |
| 33 | * An asynchronous walk. |
| 34 | * This walk will be scheduled to run in the background. It will thus visits |
| 35 | * the children at a later point in time. |
| 36 | * It is a depth first traversal of the graph. |
| 37 | */ |
| 38 | FIB_WALK_FLAG_ASYNC = (1 << 1), |
| 39 | /** |
| 40 | * An indication that the walk is currently executing. |
| 41 | */ |
| 42 | FIB_WALK_FLAG_EXECUTING = (1 << 2), |
| 43 | } fib_walk_flags_t; |
| 44 | |
| 45 | /** |
| 46 | * A representation of a graph walk from a parent object to its children |
| 47 | */ |
| 48 | typedef struct fib_walk_t_ |
| 49 | { |
| 50 | /** |
| 51 | * FIB node linkage. This object is not in the FIB object graph, |
| 52 | * but it is present in other node's dependency lists, so it needs to |
| 53 | * be pointerable to. |
| 54 | */ |
| 55 | fib_node_t fw_node; |
| 56 | |
| 57 | /** |
| 58 | * the walk's flags |
| 59 | */ |
| 60 | fib_walk_flags_t fw_flags; |
| 61 | |
| 62 | /** |
| 63 | * Sibling index in the dependency list |
| 64 | */ |
| 65 | u32 fw_dep_sibling; |
| 66 | |
| 67 | /** |
| 68 | * Sibling index in the list of all walks |
| 69 | */ |
| 70 | u32 fw_prio_sibling; |
| 71 | |
| 72 | /** |
| 73 | * Pointer to the node whose dependants this walk is walking |
| 74 | */ |
| 75 | fib_node_ptr_t fw_parent; |
| 76 | |
| 77 | /** |
| 78 | * Number of nodes visited by this walk. saved for debugging purposes. |
| 79 | */ |
| 80 | u32 fw_n_visits; |
| 81 | |
| 82 | /** |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 83 | * Time the walk started |
| 84 | */ |
| 85 | f64 fw_start_time; |
| 86 | |
| 87 | /** |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 88 | * The reasons this walk is occuring. |
| 89 | * This is a vector ordered in time. The reasons and the front were started |
| 90 | * first, and so should be acted first when a node is visisted. |
| 91 | */ |
| 92 | fib_node_back_walk_ctx_t *fw_ctx; |
| 93 | } fib_walk_t; |
| 94 | |
| 95 | /** |
| 96 | * @brief The pool of all walk objects |
| 97 | */ |
| 98 | static fib_walk_t *fib_walk_pool; |
| 99 | |
| 100 | /** |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 101 | * Statistics maintained per-walk queue |
| 102 | */ |
| 103 | typedef enum fib_walk_queue_stats_t_ |
| 104 | { |
| 105 | FIB_WALK_SCHEDULED, |
| 106 | FIB_WALK_COMPLETED, |
| 107 | } fib_walk_queue_stats_t; |
Neale Ranns | 450cd30 | 2016-11-09 17:49:42 +0000 | [diff] [blame] | 108 | #define FIB_WALK_QUEUE_STATS_NUM ((fib_walk_queue_stats_t)(FIB_WALK_COMPLETED+1)) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 109 | |
| 110 | #define FIB_WALK_QUEUE_STATS { \ |
| 111 | [FIB_WALK_SCHEDULED] = "scheduled", \ |
| 112 | [FIB_WALK_COMPLETED] = "completed", \ |
| 113 | } |
| 114 | |
| 115 | #define FOR_EACH_FIB_WALK_QUEUE_STATS(_wqs) \ |
| 116 | for ((_wqs) = FIB_WALK_SCHEDULED; \ |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 117 | (_wqs) < FIB_WALK_QUEUE_STATS_NUM; \ |
| 118 | (_wqs)++) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 119 | |
| 120 | /** |
| 121 | * The names of the walk stats |
| 122 | */ |
| 123 | static const char * const fib_walk_queue_stats_names[] = FIB_WALK_QUEUE_STATS; |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 124 | /** |
| 125 | * The names of the walk reasons |
| 126 | */ |
| 127 | static const char * const fib_node_bw_reason_names[] = FIB_NODE_BW_REASONS; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 128 | |
| 129 | /** |
| 130 | * A represenation of one queue of walk |
| 131 | */ |
| 132 | typedef struct fib_walk_queue_t_ |
| 133 | { |
| 134 | /** |
| 135 | * Qeuee stats |
| 136 | */ |
| 137 | u64 fwq_stats[FIB_WALK_QUEUE_STATS_NUM]; |
| 138 | |
| 139 | /** |
| 140 | * The node list which acts as the queue |
| 141 | */ |
| 142 | fib_node_list_t fwq_queue; |
| 143 | } fib_walk_queue_t; |
| 144 | |
| 145 | /** |
| 146 | * A set of priority queues for outstanding walks |
| 147 | */ |
| 148 | typedef struct fib_walk_queues_t_ |
| 149 | { |
| 150 | fib_walk_queue_t fwqs_queues[FIB_WALK_PRIORITY_NUM]; |
| 151 | } fib_walk_queues_t; |
| 152 | |
| 153 | /** |
| 154 | * The global queues of outstanding walks |
| 155 | */ |
| 156 | static fib_walk_queues_t fib_walk_queues; |
| 157 | |
| 158 | /** |
| 159 | * The names of the walk priorities |
| 160 | */ |
| 161 | static const char * const fib_walk_priority_names[] = FIB_WALK_PRIORITIES; |
| 162 | |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 163 | /** |
| 164 | * @brief Histogram stats on the lenths of each walk in elemenets visisted. |
| 165 | * Store upto 1<<23 elements in increments of 1<<10 |
| 166 | */ |
| 167 | #define HISTOGRAM_VISITS_PER_WALK_MAX (1<<23) |
| 168 | #define HISTOGRAM_VISITS_PER_WALK_INCR (1<<10) |
| 169 | #define HISTOGRAM_VISITS_PER_WALK_N_BUCKETS \ |
| 170 | (HISTOGRAM_VISITS_PER_WALK_MAX/HISTOGRAM_VISITS_PER_WALK_INCR) |
| 171 | static u64 fib_walk_hist_vists_per_walk[HISTOGRAM_VISITS_PER_WALK_N_BUCKETS]; |
| 172 | |
| 173 | /** |
| 174 | * @brief History of state for the last 128 walks |
| 175 | */ |
| 176 | #define HISTORY_N_WALKS 128 |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 177 | #define MAX_HISTORY_REASONS 16 |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 178 | static u32 history_last_walk_pos; |
| 179 | typedef struct fib_walk_history_t_ { |
| 180 | u32 fwh_n_visits; |
| 181 | f64 fwh_duration; |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 182 | f64 fwh_completed; |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 183 | fib_node_ptr_t fwh_parent; |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 184 | fib_walk_flags_t fwh_flags; |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 185 | fib_node_bw_reason_flag_t fwh_reason[MAX_HISTORY_REASONS]; |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 186 | } fib_walk_history_t; |
| 187 | static fib_walk_history_t fib_walk_history[HISTORY_N_WALKS]; |
| 188 | |
Neale Ranns | 710071b | 2018-09-24 12:36:26 +0000 | [diff] [blame] | 189 | static u8* format_fib_walk (u8* s, va_list *ap); |
| 190 | |
| 191 | #define FIB_WALK_DBG(_walk, _fmt, _args...) \ |
| 192 | { \ |
| 193 | vlib_log_debug(fib_walk_logger, \ |
| 194 | "[%U]:" _fmt, \ |
| 195 | format_fib_walk, \ |
| 196 | fib_walk_get_index(_walk), \ |
| 197 | ##_args); \ |
| 198 | } |
| 199 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 200 | u8* |
Christophe Fontaine | d3c008d | 2017-10-02 18:10:54 +0200 | [diff] [blame] | 201 | format_fib_walk_priority (u8 *s, va_list *ap) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 202 | { |
Christophe Fontaine | d3c008d | 2017-10-02 18:10:54 +0200 | [diff] [blame] | 203 | fib_walk_priority_t prio = va_arg(*ap, fib_walk_priority_t); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 204 | |
| 205 | ASSERT(prio < FIB_WALK_PRIORITY_NUM); |
| 206 | |
| 207 | return (format(s, "%s", fib_walk_priority_names[prio])); |
| 208 | } |
| 209 | static u8* |
Christophe Fontaine | d3c008d | 2017-10-02 18:10:54 +0200 | [diff] [blame] | 210 | format_fib_walk_queue_stats (u8 *s, va_list *ap) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 211 | { |
Christophe Fontaine | d3c008d | 2017-10-02 18:10:54 +0200 | [diff] [blame] | 212 | fib_walk_queue_stats_t wqs = va_arg(*ap, fib_walk_queue_stats_t); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 213 | |
| 214 | ASSERT(wqs < FIB_WALK_QUEUE_STATS_NUM); |
| 215 | |
| 216 | return (format(s, "%s", fib_walk_queue_stats_names[wqs])); |
| 217 | } |
| 218 | |
| 219 | static index_t |
| 220 | fib_walk_get_index (fib_walk_t *fwalk) |
| 221 | { |
| 222 | return (fwalk - fib_walk_pool); |
| 223 | } |
| 224 | |
| 225 | static fib_walk_t * |
| 226 | fib_walk_get (index_t fwi) |
| 227 | { |
| 228 | return (pool_elt_at_index(fib_walk_pool, fwi)); |
| 229 | } |
| 230 | |
| 231 | /* |
| 232 | * not static so it can be used in the unit tests |
| 233 | */ |
| 234 | u32 |
| 235 | fib_walk_queue_get_size (fib_walk_priority_t prio) |
| 236 | { |
| 237 | return (fib_node_list_get_size(fib_walk_queues.fwqs_queues[prio].fwq_queue)); |
| 238 | } |
| 239 | |
| 240 | static fib_node_index_t |
| 241 | fib_walk_queue_get_front (fib_walk_priority_t prio) |
| 242 | { |
| 243 | fib_node_ptr_t wp; |
| 244 | |
| 245 | fib_node_list_get_front(fib_walk_queues.fwqs_queues[prio].fwq_queue, &wp); |
| 246 | |
| 247 | return (wp.fnp_index); |
| 248 | } |
| 249 | |
| 250 | static void |
Neale Ranns | f12a83f | 2017-04-18 09:09:40 -0700 | [diff] [blame] | 251 | fib_walk_destroy (index_t fwi) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 252 | { |
Neale Ranns | f12a83f | 2017-04-18 09:09:40 -0700 | [diff] [blame] | 253 | fib_walk_t *fwalk; |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 254 | u32 bucket, ii; |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 255 | |
Neale Ranns | f12a83f | 2017-04-18 09:09:40 -0700 | [diff] [blame] | 256 | fwalk = fib_walk_get(fwi); |
| 257 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 258 | if (FIB_NODE_INDEX_INVALID != fwalk->fw_prio_sibling) |
| 259 | { |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 260 | fib_node_list_elt_remove(fwalk->fw_prio_sibling); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 261 | } |
| 262 | fib_node_child_remove(fwalk->fw_parent.fnp_type, |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 263 | fwalk->fw_parent.fnp_index, |
| 264 | fwalk->fw_dep_sibling); |
| 265 | |
| 266 | /* |
Neale Ranns | f12a83f | 2017-04-18 09:09:40 -0700 | [diff] [blame] | 267 | * refetch the walk object. More walks could have been spawned as a result |
| 268 | * of releasing the lock on the parent. |
| 269 | */ |
| 270 | fwalk = fib_walk_get(fwi); |
| 271 | |
| 272 | /* |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 273 | * add the stats to the continuous histogram collection. |
| 274 | */ |
| 275 | bucket = (fwalk->fw_n_visits / HISTOGRAM_VISITS_PER_WALK_INCR); |
Neale Ranns | 924d03a | 2016-10-19 08:25:46 +0100 | [diff] [blame] | 276 | bucket = (bucket >= HISTOGRAM_VISITS_PER_WALK_N_BUCKETS ? |
Neale Ranns | 5899fde | 2016-10-12 13:51:05 +0100 | [diff] [blame] | 277 | HISTOGRAM_VISITS_PER_WALK_N_BUCKETS - 1 : |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 278 | bucket); |
| 279 | fib_walk_hist_vists_per_walk[bucket]++; |
| 280 | |
| 281 | /* |
| 282 | * save stats to the recent history |
| 283 | */ |
| 284 | |
| 285 | fib_walk_history[history_last_walk_pos].fwh_n_visits = |
| 286 | fwalk->fw_n_visits; |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 287 | fib_walk_history[history_last_walk_pos].fwh_completed = |
| 288 | vlib_time_now(vlib_get_main()); |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 289 | fib_walk_history[history_last_walk_pos].fwh_duration = |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 290 | fib_walk_history[history_last_walk_pos].fwh_completed - |
| 291 | fwalk->fw_start_time; |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 292 | fib_walk_history[history_last_walk_pos].fwh_parent = |
| 293 | fwalk->fw_parent; |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 294 | fib_walk_history[history_last_walk_pos].fwh_flags = |
| 295 | fwalk->fw_flags; |
| 296 | |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 297 | vec_foreach_index(ii, fwalk->fw_ctx) |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 298 | { |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 299 | if (ii < MAX_HISTORY_REASONS) |
| 300 | { |
| 301 | fib_walk_history[history_last_walk_pos].fwh_reason[ii] = |
| 302 | fwalk->fw_ctx[ii].fnbw_reason; |
| 303 | } |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 304 | } |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 305 | |
| 306 | history_last_walk_pos = (history_last_walk_pos + 1) % HISTORY_N_WALKS; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 307 | |
| 308 | fib_node_deinit(&fwalk->fw_node); |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 309 | vec_free(fwalk->fw_ctx); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 310 | pool_put(fib_walk_pool, fwalk); |
| 311 | } |
| 312 | |
| 313 | /** |
| 314 | * return code when advancing a walk |
| 315 | */ |
| 316 | typedef enum fib_walk_advance_rc_t_ |
| 317 | { |
| 318 | /** |
| 319 | * The walk is complete |
| 320 | */ |
| 321 | FIB_WALK_ADVANCE_DONE, |
| 322 | /** |
| 323 | * the walk has more work |
| 324 | */ |
| 325 | FIB_WALK_ADVANCE_MORE, |
| 326 | /** |
| 327 | * The walk merged with the one in front |
| 328 | */ |
| 329 | FIB_WALK_ADVANCE_MERGE, |
| 330 | } fib_walk_advance_rc_t; |
| 331 | |
| 332 | /** |
| 333 | * @brief Advance the walk one element in its work list |
| 334 | */ |
| 335 | static fib_walk_advance_rc_t |
| 336 | fib_walk_advance (fib_node_index_t fwi) |
| 337 | { |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 338 | fib_node_back_walk_rc_t wrc; |
| 339 | fib_node_ptr_t sibling; |
| 340 | fib_walk_t *fwalk; |
Neale Ranns | 8c4611b | 2017-05-23 03:43:47 -0700 | [diff] [blame] | 341 | uint n_ctxs, ii; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 342 | int more_elts; |
| 343 | |
| 344 | /* |
| 345 | * this walk function is re-entrant - walks acan spawn walks. |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 346 | * fib_walk_t objects come from a pool, so they can realloc. we need |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 347 | * to retch from said pool at the appropriate times. |
| 348 | */ |
| 349 | fwalk = fib_walk_get(fwi); |
| 350 | |
| 351 | more_elts = fib_node_list_elt_get_next(fwalk->fw_dep_sibling, &sibling); |
| 352 | |
| 353 | if (more_elts) |
| 354 | { |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 355 | |
Neale Ranns | 8c4611b | 2017-05-23 03:43:47 -0700 | [diff] [blame] | 356 | /* |
| 357 | * loop through the backwalk contexts. This can grow in length |
| 358 | * as walks on the same object meet each other. Order is preserved so the |
| 359 | * most recently started walk as at the back of the vector. |
| 360 | */ |
| 361 | ii = 0; |
| 362 | n_ctxs = vec_len(fwalk->fw_ctx); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 363 | |
Neale Ranns | 8c4611b | 2017-05-23 03:43:47 -0700 | [diff] [blame] | 364 | while (ii < n_ctxs) |
| 365 | { |
Neale Ranns | 58085f2 | 2019-02-14 14:58:40 +0000 | [diff] [blame^] | 366 | fib_node_back_walk_ctx_t ctx = fwalk->fw_ctx[ii]; |
| 367 | |
| 368 | wrc = fib_node_back_walk_one(&sibling, &ctx); |
Neale Ranns | 8c4611b | 2017-05-23 03:43:47 -0700 | [diff] [blame] | 369 | |
| 370 | ii++; |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 371 | fwalk = fib_walk_get(fwi); |
| 372 | fwalk->fw_n_visits++; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 373 | |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 374 | if (FIB_NODE_BACK_WALK_MERGE == wrc) |
| 375 | { |
| 376 | /* |
| 377 | * this walk has merged with the one further along the node's |
| 378 | * dependecy list. |
| 379 | */ |
| 380 | return (FIB_WALK_ADVANCE_MERGE); |
| 381 | } |
Neale Ranns | 8c4611b | 2017-05-23 03:43:47 -0700 | [diff] [blame] | 382 | |
| 383 | /* |
| 384 | * re-evaluate the number of backwalk contexts we need to process. |
| 385 | */ |
| 386 | n_ctxs = vec_len(fwalk->fw_ctx); |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 387 | } |
| 388 | /* |
| 389 | * move foward to the next node to visit |
| 390 | */ |
| 391 | more_elts = fib_node_list_advance(fwalk->fw_dep_sibling); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 392 | } |
| 393 | |
| 394 | if (more_elts) |
| 395 | { |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 396 | return (FIB_WALK_ADVANCE_MORE); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 397 | } |
| 398 | |
| 399 | return (FIB_WALK_ADVANCE_DONE); |
| 400 | } |
| 401 | |
| 402 | /** |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 403 | * @breif Enurmerate the times of sleep between walks |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 404 | */ |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 405 | typedef enum fib_walk_sleep_type_t_ |
| 406 | { |
| 407 | FIB_WALK_SHORT_SLEEP, |
| 408 | FIB_WALK_LONG_SLEEP, |
| 409 | } fib_walk_sleep_type_t; |
| 410 | |
| 411 | #define FIB_WALK_N_SLEEP (FIB_WALK_LONG_SLEEP+1) |
| 412 | |
| 413 | /** |
| 414 | * @brief Durations for the sleep types |
| 415 | */ |
| 416 | static f64 fib_walk_sleep_duration[] = { |
Neale Ranns | aba8be6 | 2017-06-10 01:43:44 -0700 | [diff] [blame] | 417 | /** |
| 418 | * Long sleep when there is no more work, i.e. the queues are empty. |
| 419 | * This is a sleep (as opposed to a wait for event) just to be sure we |
| 420 | * are not missing events by sleeping forever. |
| 421 | */ |
| 422 | [FIB_WALK_LONG_SLEEP] = 2, |
| 423 | |
| 424 | /** |
| 425 | * Short sleep. There is work left in the queues. We are yielding the CPU |
| 426 | * momentarily. |
| 427 | */ |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 428 | [FIB_WALK_SHORT_SLEEP] = 1e-8, |
| 429 | }; |
| 430 | |
| 431 | /** |
| 432 | * @brief The time quota for a walk. When more than this amount of time is |
| 433 | * spent, the walk process will yield. |
| 434 | */ |
| 435 | static f64 quota = 1e-4; |
| 436 | |
| 437 | /** |
| 438 | * Histogram on the amount of work done (in msecs) in each walk |
| 439 | */ |
| 440 | #define N_TIME_BUCKETS 128 |
| 441 | #define TIME_INCREMENTS (N_TIME_BUCKETS/2) |
| 442 | static u64 fib_walk_work_time_taken[N_TIME_BUCKETS]; |
| 443 | |
| 444 | /** |
| 445 | * Histogram on the number of nodes visted in each quota |
| 446 | */ |
| 447 | #define N_ELTS_BUCKETS 128 |
| 448 | static u32 fib_walk_work_nodes_visisted_incr = 2; |
| 449 | static u64 fib_walk_work_nodes_visited[N_ELTS_BUCKETS]; |
| 450 | |
| 451 | /** |
| 452 | * Histogram of the sleep lengths |
| 453 | */ |
| 454 | static u64 fib_walk_sleep_lengths[2]; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 455 | |
| 456 | /** |
| 457 | * @brief Service the queues |
| 458 | * This is not declared static so that it can be unit tested - i know i know... |
| 459 | */ |
| 460 | f64 |
| 461 | fib_walk_process_queues (vlib_main_t * vm, |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 462 | const f64 quota) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 463 | { |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 464 | f64 start_time, consumed_time; |
| 465 | fib_walk_sleep_type_t sleep; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 466 | fib_walk_priority_t prio; |
| 467 | fib_walk_advance_rc_t rc; |
| 468 | fib_node_index_t fwi; |
| 469 | fib_walk_t *fwalk; |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 470 | u32 n_elts; |
| 471 | i32 bucket; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 472 | |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 473 | consumed_time = 0; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 474 | start_time = vlib_time_now(vm); |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 475 | n_elts = 0; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 476 | |
| 477 | FOR_EACH_FIB_WALK_PRIORITY(prio) |
| 478 | { |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 479 | while (0 != fib_walk_queue_get_size(prio)) |
| 480 | { |
| 481 | fwi = fib_walk_queue_get_front(prio); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 482 | |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 483 | /* |
| 484 | * set this walk as executing |
| 485 | */ |
| 486 | fwalk = fib_walk_get(fwi); |
| 487 | fwalk->fw_flags |= FIB_WALK_FLAG_EXECUTING; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 488 | |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 489 | do |
| 490 | { |
| 491 | rc = fib_walk_advance(fwi); |
| 492 | n_elts++; |
| 493 | consumed_time = (vlib_time_now(vm) - start_time); |
| 494 | } while ((consumed_time < quota) && |
| 495 | (FIB_WALK_ADVANCE_MORE == rc)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 496 | |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 497 | /* |
| 498 | * if this walk has no more work then pop it from the queue |
| 499 | * and move on to the next. |
| 500 | */ |
| 501 | if (FIB_WALK_ADVANCE_MORE != rc) |
| 502 | { |
Neale Ranns | f12a83f | 2017-04-18 09:09:40 -0700 | [diff] [blame] | 503 | fib_walk_destroy(fwi); |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 504 | fib_walk_queues.fwqs_queues[prio].fwq_stats[FIB_WALK_COMPLETED]++; |
| 505 | } |
| 506 | else |
| 507 | { |
| 508 | /* |
| 509 | * passed our work quota. sleep time. |
| 510 | */ |
| 511 | fwalk = fib_walk_get(fwi); |
| 512 | fwalk->fw_flags &= ~FIB_WALK_FLAG_EXECUTING; |
| 513 | sleep = FIB_WALK_SHORT_SLEEP; |
| 514 | goto that_will_do_for_now; |
| 515 | } |
| 516 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 517 | } |
| 518 | /* |
| 519 | * got to the end of all the work |
| 520 | */ |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 521 | sleep = FIB_WALK_LONG_SLEEP; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 522 | |
| 523 | that_will_do_for_now: |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 524 | |
| 525 | /* |
| 526 | * collect the stats: |
| 527 | * - for the number of nodes visisted we store 128 increments |
| 528 | * - for the time consumed we store quota/TIME_INCREMENTS increments. |
| 529 | */ |
| 530 | bucket = ((n_elts/fib_walk_work_nodes_visisted_incr) > N_ELTS_BUCKETS ? |
| 531 | N_ELTS_BUCKETS-1 : |
| 532 | n_elts/fib_walk_work_nodes_visisted_incr); |
| 533 | ++fib_walk_work_nodes_visited[bucket]; |
| 534 | |
| 535 | bucket = (consumed_time - quota) / (quota / TIME_INCREMENTS); |
| 536 | bucket += N_TIME_BUCKETS/2; |
| 537 | bucket = (bucket < 0 ? 0 : bucket); |
| 538 | bucket = (bucket > N_TIME_BUCKETS-1 ? N_TIME_BUCKETS-1 : bucket); |
| 539 | ++fib_walk_work_time_taken[bucket]; |
| 540 | |
| 541 | ++fib_walk_sleep_lengths[sleep]; |
| 542 | |
| 543 | return (fib_walk_sleep_duration[sleep]); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 544 | } |
| 545 | |
| 546 | /** |
Neale Ranns | f12a83f | 2017-04-18 09:09:40 -0700 | [diff] [blame] | 547 | * Events sent to the FIB walk process |
| 548 | */ |
| 549 | typedef enum fib_walk_process_event_t_ |
| 550 | { |
| 551 | FIB_WALK_PROCESS_EVENT_DATA, |
| 552 | FIB_WALK_PROCESS_EVENT_ENABLE, |
| 553 | FIB_WALK_PROCESS_EVENT_DISABLE, |
| 554 | } fib_walk_process_event; |
| 555 | |
| 556 | /** |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 557 | * @brief The 'fib-walk' process's main loop. |
| 558 | */ |
| 559 | static uword |
| 560 | fib_walk_process (vlib_main_t * vm, |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 561 | vlib_node_runtime_t * node, |
| 562 | vlib_frame_t * f) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 563 | { |
Neale Ranns | f12a83f | 2017-04-18 09:09:40 -0700 | [diff] [blame] | 564 | uword event_type, *event_data = 0; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 565 | f64 sleep_time; |
Neale Ranns | f12a83f | 2017-04-18 09:09:40 -0700 | [diff] [blame] | 566 | int enabled; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 567 | |
Neale Ranns | f12a83f | 2017-04-18 09:09:40 -0700 | [diff] [blame] | 568 | enabled = 1; |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 569 | sleep_time = fib_walk_sleep_duration[FIB_WALK_SHORT_SLEEP]; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 570 | |
| 571 | while (1) |
| 572 | { |
Neale Ranns | f12a83f | 2017-04-18 09:09:40 -0700 | [diff] [blame] | 573 | /* |
| 574 | * the feature to disable/enable this walk process is only |
| 575 | * for testing purposes |
| 576 | */ |
| 577 | if (enabled) |
| 578 | { |
| 579 | vlib_process_wait_for_event_or_clock(vm, sleep_time); |
| 580 | } |
| 581 | else |
| 582 | { |
| 583 | vlib_process_wait_for_event(vm); |
| 584 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 585 | |
Neale Ranns | f12a83f | 2017-04-18 09:09:40 -0700 | [diff] [blame] | 586 | event_type = vlib_process_get_events(vm, &event_data); |
| 587 | vec_reset_length(event_data); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 588 | |
Neale Ranns | f12a83f | 2017-04-18 09:09:40 -0700 | [diff] [blame] | 589 | switch (event_type) |
| 590 | { |
| 591 | case FIB_WALK_PROCESS_EVENT_ENABLE: |
| 592 | enabled = 1; |
| 593 | break; |
| 594 | case FIB_WALK_PROCESS_EVENT_DISABLE: |
| 595 | enabled = 0; |
| 596 | break; |
| 597 | default: |
| 598 | break; |
| 599 | } |
| 600 | |
| 601 | if (enabled) |
| 602 | { |
| 603 | sleep_time = fib_walk_process_queues(vm, quota); |
| 604 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 605 | } |
| 606 | |
| 607 | /* |
| 608 | * Unreached |
| 609 | */ |
| 610 | ASSERT(!"WTF"); |
| 611 | return 0; |
| 612 | } |
| 613 | |
| 614 | /* *INDENT-OFF* */ |
| 615 | VLIB_REGISTER_NODE (fib_walk_process_node,static) = { |
| 616 | .function = fib_walk_process, |
| 617 | .type = VLIB_NODE_TYPE_PROCESS, |
| 618 | .name = "fib-walk", |
| 619 | }; |
| 620 | /* *INDENT-ON* */ |
| 621 | |
| 622 | /** |
| 623 | * @brief Allocate a new walk object |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 624 | */ |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 625 | static fib_walk_t * |
| 626 | fib_walk_alloc (fib_node_type_t parent_type, |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 627 | fib_node_index_t parent_index, |
| 628 | fib_walk_flags_t flags, |
| 629 | fib_node_back_walk_ctx_t *ctx) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 630 | { |
| 631 | fib_walk_t *fwalk; |
| 632 | |
| 633 | pool_get(fib_walk_pool, fwalk); |
| 634 | |
| 635 | fib_node_init(&fwalk->fw_node, FIB_NODE_TYPE_WALK); |
| 636 | |
| 637 | fwalk->fw_flags = flags; |
| 638 | fwalk->fw_dep_sibling = FIB_NODE_INDEX_INVALID; |
| 639 | fwalk->fw_prio_sibling = FIB_NODE_INDEX_INVALID; |
| 640 | fwalk->fw_parent.fnp_index = parent_index; |
| 641 | fwalk->fw_parent.fnp_type = parent_type; |
| 642 | fwalk->fw_ctx = NULL; |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 643 | fwalk->fw_start_time = vlib_time_now(vlib_get_main()); |
| 644 | fwalk->fw_n_visits = 0; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 645 | |
| 646 | /* |
| 647 | * make a copy of the backwalk context so the depth count remains |
| 648 | * the same for each sibling visitsed. This is important in the case |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 649 | * where a parent has a loop via one child, but all the others are not. |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 650 | * if the looped child were visited first, the depth count would exceed, the |
| 651 | * max and the walk would terminate before it reached the other siblings. |
| 652 | */ |
| 653 | vec_add1(fwalk->fw_ctx, *ctx); |
| 654 | |
| 655 | return (fwalk); |
| 656 | } |
| 657 | |
| 658 | /** |
| 659 | * @brief Enqueue a walk onto the appropriate priority queue. Then signal |
| 660 | * the background process there is work to do. |
| 661 | */ |
| 662 | static index_t |
| 663 | fib_walk_prio_queue_enquue (fib_walk_priority_t prio, |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 664 | fib_walk_t *fwalk) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 665 | { |
| 666 | index_t sibling; |
| 667 | |
| 668 | sibling = fib_node_list_push_front(fib_walk_queues.fwqs_queues[prio].fwq_queue, |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 669 | 0, |
| 670 | FIB_NODE_TYPE_WALK, |
| 671 | fib_walk_get_index(fwalk)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 672 | fib_walk_queues.fwqs_queues[prio].fwq_stats[FIB_WALK_SCHEDULED]++; |
| 673 | |
| 674 | /* |
| 675 | * poke the fib-walk process to perform the async walk. |
| 676 | * we are not passing it specific data, hence the last two args, |
| 677 | * the process will drain the queues |
| 678 | */ |
| 679 | vlib_process_signal_event(vlib_get_main(), |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 680 | fib_walk_process_node.index, |
Neale Ranns | f12a83f | 2017-04-18 09:09:40 -0700 | [diff] [blame] | 681 | FIB_WALK_PROCESS_EVENT_DATA, |
| 682 | 0); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 683 | |
| 684 | return (sibling); |
| 685 | } |
| 686 | |
| 687 | void |
| 688 | fib_walk_async (fib_node_type_t parent_type, |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 689 | fib_node_index_t parent_index, |
| 690 | fib_walk_priority_t prio, |
| 691 | fib_node_back_walk_ctx_t *ctx) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 692 | { |
| 693 | fib_walk_t *fwalk; |
| 694 | |
| 695 | if (FIB_NODE_GRAPH_MAX_DEPTH < ++ctx->fnbw_depth) |
| 696 | { |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 697 | /* |
| 698 | * The walk has reached the maximum depth. there is a loop in the graph. |
| 699 | * bail. |
| 700 | */ |
| 701 | return; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 702 | } |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 703 | if (0 == fib_node_get_n_children(parent_type, |
| 704 | parent_index)) |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 705 | { |
| 706 | /* |
| 707 | * no children to walk - quit now |
| 708 | */ |
| 709 | return; |
| 710 | } |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 711 | if (ctx->fnbw_flags & FIB_NODE_BW_FLAG_FORCE_SYNC) |
| 712 | { |
| 713 | /* |
| 714 | * the originator of the walk wanted it to be synchronous, but the |
| 715 | * parent object chose async - denied. |
| 716 | */ |
| 717 | return (fib_walk_sync(parent_type, parent_index, ctx)); |
| 718 | } |
| 719 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 720 | |
| 721 | fwalk = fib_walk_alloc(parent_type, |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 722 | parent_index, |
| 723 | FIB_WALK_FLAG_ASYNC, |
| 724 | ctx); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 725 | |
| 726 | fwalk->fw_dep_sibling = fib_node_child_add(parent_type, |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 727 | parent_index, |
| 728 | FIB_NODE_TYPE_WALK, |
| 729 | fib_walk_get_index(fwalk)); |
| 730 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 731 | fwalk->fw_prio_sibling = fib_walk_prio_queue_enquue(prio, fwalk); |
Neale Ranns | 710071b | 2018-09-24 12:36:26 +0000 | [diff] [blame] | 732 | |
| 733 | FIB_WALK_DBG(fwalk, "async-start: %U", |
| 734 | format_fib_node_bw_reason, ctx->fnbw_reason); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 735 | } |
| 736 | |
| 737 | /** |
| 738 | * @brief Back walk all the children of a FIB node. |
| 739 | * |
| 740 | * note this is a synchronous depth first walk. Children visited may propagate |
| 741 | * the walk to thier children. Other children node types may not propagate, |
| 742 | * synchronously but instead queue the walk for later async completion. |
| 743 | */ |
| 744 | void |
| 745 | fib_walk_sync (fib_node_type_t parent_type, |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 746 | fib_node_index_t parent_index, |
| 747 | fib_node_back_walk_ctx_t *ctx) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 748 | { |
| 749 | fib_walk_advance_rc_t rc; |
| 750 | fib_node_index_t fwi; |
| 751 | fib_walk_t *fwalk; |
| 752 | |
| 753 | if (FIB_NODE_GRAPH_MAX_DEPTH < ++ctx->fnbw_depth) |
| 754 | { |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 755 | /* |
| 756 | * The walk has reached the maximum depth. there is a loop in the graph. |
| 757 | * bail. |
| 758 | */ |
| 759 | return; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 760 | } |
Neale Ranns | ad422ed | 2016-11-02 14:20:04 +0000 | [diff] [blame] | 761 | if (0 == fib_node_get_n_children(parent_type, |
| 762 | parent_index)) |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 763 | { |
| 764 | /* |
| 765 | * no children to walk - quit now |
| 766 | */ |
| 767 | return; |
| 768 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 769 | |
| 770 | fwalk = fib_walk_alloc(parent_type, |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 771 | parent_index, |
| 772 | FIB_WALK_FLAG_SYNC, |
| 773 | ctx); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 774 | |
| 775 | fwalk->fw_dep_sibling = fib_node_child_add(parent_type, |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 776 | parent_index, |
| 777 | FIB_NODE_TYPE_WALK, |
| 778 | fib_walk_get_index(fwalk)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 779 | fwi = fib_walk_get_index(fwalk); |
Neale Ranns | 710071b | 2018-09-24 12:36:26 +0000 | [diff] [blame] | 780 | FIB_WALK_DBG(fwalk, "sync-start: %U", |
| 781 | format_fib_node_bw_reason, ctx->fnbw_reason); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 782 | |
| 783 | while (1) |
| 784 | { |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 785 | /* |
| 786 | * set this walk as executing |
| 787 | */ |
| 788 | fwalk->fw_flags |= FIB_WALK_FLAG_EXECUTING; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 789 | |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 790 | do |
| 791 | { |
| 792 | rc = fib_walk_advance(fwi); |
| 793 | } while (FIB_WALK_ADVANCE_MORE == rc); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 794 | |
| 795 | |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 796 | /* |
| 797 | * this walk function is re-entrant - walks can spawn walks. |
| 798 | * fib_walk_t objects come from a pool, so they can realloc. we need |
| 799 | * to re-fetch from said pool at the appropriate times. |
| 800 | */ |
| 801 | fwalk = fib_walk_get(fwi); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 802 | |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 803 | if (FIB_WALK_ADVANCE_MERGE == rc) |
| 804 | { |
| 805 | /* |
| 806 | * this sync walk merged with an walk in front. |
| 807 | * by reqeusting a sync walk the client wanted all children walked, |
| 808 | * so we ditch the walk object in hand and continue with the one |
| 809 | * we merged into |
| 810 | */ |
| 811 | fib_node_ptr_t merged_walk; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 812 | |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 813 | fib_node_list_elt_get_next(fwalk->fw_dep_sibling, &merged_walk); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 814 | |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 815 | ASSERT(FIB_NODE_INDEX_INVALID != merged_walk.fnp_index); |
| 816 | ASSERT(FIB_NODE_TYPE_WALK == merged_walk.fnp_type); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 817 | |
Neale Ranns | f12a83f | 2017-04-18 09:09:40 -0700 | [diff] [blame] | 818 | fib_walk_destroy(fwi); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 819 | |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 820 | fwi = merged_walk.fnp_index; |
| 821 | fwalk = fib_walk_get(fwi); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 822 | |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 823 | if (FIB_WALK_FLAG_EXECUTING & fwalk->fw_flags) |
| 824 | { |
| 825 | /* |
| 826 | * we are executing a sync walk, and we have met with another |
| 827 | * walk that is also executing. since only one walk executs at once |
| 828 | * (there is no multi-threading) this implies we have met ourselves |
| 829 | * and hence the is a loop in the graph. |
| 830 | * This function is re-entrant, so the walk object we met is being |
| 831 | * acted on in a stack frame below this one. We must therefore not |
| 832 | * continue with it now, but let the stack unwind and along the |
| 833 | * appropriate frame to read the depth count and bail. |
| 834 | */ |
Neale Ranns | 710071b | 2018-09-24 12:36:26 +0000 | [diff] [blame] | 835 | FIB_WALK_DBG(fwalk, "sync-stop: %U", |
| 836 | format_fib_node_bw_reason, |
| 837 | ctx->fnbw_reason); |
| 838 | |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 839 | fwalk = NULL; |
| 840 | break; |
| 841 | } |
| 842 | } |
| 843 | else |
| 844 | { |
| 845 | /* |
| 846 | * the walk reached the end of the depdency list. |
| 847 | */ |
| 848 | break; |
| 849 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 850 | } |
| 851 | |
| 852 | if (NULL != fwalk) |
| 853 | { |
Neale Ranns | 710071b | 2018-09-24 12:36:26 +0000 | [diff] [blame] | 854 | FIB_WALK_DBG(fwalk, "sync-stop: %U", |
| 855 | format_fib_node_bw_reason, |
| 856 | ctx->fnbw_reason); |
Neale Ranns | f12a83f | 2017-04-18 09:09:40 -0700 | [diff] [blame] | 857 | fib_walk_destroy(fwi); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 858 | } |
| 859 | } |
| 860 | |
| 861 | static fib_node_t * |
| 862 | fib_walk_get_node (fib_node_index_t index) |
| 863 | { |
| 864 | fib_walk_t *fwalk; |
| 865 | |
| 866 | fwalk = fib_walk_get(index); |
| 867 | |
| 868 | return (&(fwalk->fw_node)); |
| 869 | } |
| 870 | |
| 871 | /** |
| 872 | * Walk objects are not parents, nor are they locked. |
| 873 | * are no-ops |
| 874 | */ |
| 875 | static void |
| 876 | fib_walk_last_lock_gone (fib_node_t *node) |
| 877 | { |
| 878 | ASSERT(0); |
| 879 | } |
| 880 | |
| 881 | static fib_walk_t* |
| 882 | fib_walk_get_from_node (fib_node_t *node) |
| 883 | { |
| 884 | return ((fib_walk_t*)(((char*)node) - |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 885 | STRUCT_OFFSET_OF(fib_walk_t, fw_node))); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 886 | } |
| 887 | |
| 888 | /** |
| 889 | * @brief Another back walk has reach this walk. |
| 890 | * Megre them so there is only one left. It is this node being |
| 891 | * visited that will remain, so copy or merge the context onto it. |
| 892 | */ |
| 893 | static fib_node_back_walk_rc_t |
| 894 | fib_walk_back_walk_notify (fib_node_t *node, |
| 895 | fib_node_back_walk_ctx_t *ctx) |
| 896 | { |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 897 | fib_node_back_walk_ctx_t *last; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 898 | fib_walk_t *fwalk; |
| 899 | |
| 900 | fwalk = fib_walk_get_from_node(node); |
| 901 | |
| 902 | /* |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 903 | * check whether the walk context can be merged with the most recent. |
| 904 | * the most recent was the one last added and is thus at the back of the vector. |
| 905 | * we can merge walks if the reason for the walk is the same. |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 906 | */ |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 907 | last = vec_end(fwalk->fw_ctx) - 1; |
| 908 | |
| 909 | if (last->fnbw_reason == ctx->fnbw_reason) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 910 | { |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 911 | /* |
| 912 | * copy the largest of the depth values. in the presence of a loop, |
| 913 | * the same walk will merge with itself. if we take the smaller depth |
| 914 | * then it will never end. |
| 915 | */ |
| 916 | last->fnbw_depth = ((last->fnbw_depth >= ctx->fnbw_depth) ? |
| 917 | last->fnbw_depth : |
| 918 | ctx->fnbw_depth); |
| 919 | } |
| 920 | else |
| 921 | { |
| 922 | /* |
| 923 | * walks could not be merged, this means that the walk infront needs to |
| 924 | * perform different action to this one that has caught up. the one in |
| 925 | * front was scheduled first so append the new walk context to the back |
| 926 | * of the list. |
| 927 | */ |
| 928 | vec_add1(fwalk->fw_ctx, *ctx); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 929 | } |
| 930 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 931 | return (FIB_NODE_BACK_WALK_MERGE); |
| 932 | } |
| 933 | |
| 934 | /** |
| 935 | * The FIB walk's graph node virtual function table |
| 936 | */ |
| 937 | static const fib_node_vft_t fib_walk_vft = { |
| 938 | .fnv_get = fib_walk_get_node, |
| 939 | .fnv_last_lock = fib_walk_last_lock_gone, |
| 940 | .fnv_back_walk = fib_walk_back_walk_notify, |
| 941 | }; |
| 942 | |
| 943 | void |
| 944 | fib_walk_module_init (void) |
| 945 | { |
| 946 | fib_walk_priority_t prio; |
| 947 | |
| 948 | FOR_EACH_FIB_WALK_PRIORITY(prio) |
| 949 | { |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 950 | fib_walk_queues.fwqs_queues[prio].fwq_queue = fib_node_list_create(); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 951 | } |
| 952 | |
| 953 | fib_node_register_type(FIB_NODE_TYPE_WALK, &fib_walk_vft); |
Neale Ranns | 710071b | 2018-09-24 12:36:26 +0000 | [diff] [blame] | 954 | fib_walk_logger = vlib_log_register_class("fib", "walk"); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 955 | } |
| 956 | |
| 957 | static u8* |
Christophe Fontaine | d3c008d | 2017-10-02 18:10:54 +0200 | [diff] [blame] | 958 | format_fib_walk (u8* s, va_list *ap) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 959 | { |
Christophe Fontaine | d3c008d | 2017-10-02 18:10:54 +0200 | [diff] [blame] | 960 | fib_node_index_t fwi = va_arg(*ap, fib_node_index_t); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 961 | fib_walk_t *fwalk; |
| 962 | |
| 963 | fwalk = fib_walk_get(fwi); |
| 964 | |
Neale Ranns | 710071b | 2018-09-24 12:36:26 +0000 | [diff] [blame] | 965 | return (format(s, "[@%d] parent:{%s:%d} visits:%d flags:%d", fwi, |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 966 | fib_node_type_get_name(fwalk->fw_parent.fnp_type), |
| 967 | fwalk->fw_parent.fnp_index, |
| 968 | fwalk->fw_n_visits, |
| 969 | fwalk->fw_flags)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 970 | } |
| 971 | |
Neale Ranns | 710071b | 2018-09-24 12:36:26 +0000 | [diff] [blame] | 972 | u8 * |
| 973 | format_fib_node_bw_reason (u8 *s, va_list *args) |
| 974 | { |
| 975 | fib_node_bw_reason_flag_t flag = va_arg (*args, int); |
| 976 | fib_node_back_walk_reason_t reason; |
| 977 | |
| 978 | FOR_EACH_FIB_NODE_BW_REASON(reason) { |
| 979 | if ((1<<reason) & flag) |
| 980 | s = format(s, "%s", fib_node_bw_reason_names[reason]); |
| 981 | } |
| 982 | |
| 983 | return (s); |
| 984 | } |
| 985 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 986 | static clib_error_t * |
| 987 | fib_walk_show (vlib_main_t * vm, |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 988 | unformat_input_t * input, |
| 989 | vlib_cli_command_t * cmd) |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 990 | { |
| 991 | fib_walk_queue_stats_t wqs; |
| 992 | fib_walk_priority_t prio; |
| 993 | fib_node_ptr_t sibling; |
| 994 | fib_node_index_t fwi; |
| 995 | fib_walk_t *fwalk; |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 996 | int more_elts, ii; |
| 997 | u8 *s = NULL; |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 998 | |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 999 | #define USEC 1000000 |
| 1000 | vlib_cli_output(vm, "FIB Walk Quota = %.2fusec:", quota * USEC); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1001 | vlib_cli_output(vm, "FIB Walk queues:"); |
| 1002 | |
| 1003 | FOR_EACH_FIB_WALK_PRIORITY(prio) |
| 1004 | { |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 1005 | vlib_cli_output(vm, " %U priority queue:", |
| 1006 | format_fib_walk_priority, prio); |
| 1007 | vlib_cli_output(vm, " Stats: "); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1008 | |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 1009 | FOR_EACH_FIB_WALK_QUEUE_STATS(wqs) |
| 1010 | { |
| 1011 | vlib_cli_output(vm, " %U:%d", |
| 1012 | format_fib_walk_queue_stats, wqs, |
| 1013 | fib_walk_queues.fwqs_queues[prio].fwq_stats[wqs]); |
| 1014 | } |
| 1015 | vlib_cli_output(vm, " Occupancy:%d", |
| 1016 | fib_node_list_get_size( |
| 1017 | fib_walk_queues.fwqs_queues[prio].fwq_queue)); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1018 | |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 1019 | more_elts = fib_node_list_get_front( |
| 1020 | fib_walk_queues.fwqs_queues[prio].fwq_queue, |
| 1021 | &sibling); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1022 | |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 1023 | while (more_elts) |
| 1024 | { |
| 1025 | ASSERT(FIB_NODE_INDEX_INVALID != sibling.fnp_index); |
| 1026 | ASSERT(FIB_NODE_TYPE_WALK == sibling.fnp_type); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1027 | |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 1028 | fwi = sibling.fnp_index; |
| 1029 | fwalk = fib_walk_get(fwi); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1030 | |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 1031 | vlib_cli_output(vm, " %U", format_fib_walk, fwi); |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1032 | |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 1033 | more_elts = fib_node_list_elt_get_next(fwalk->fw_prio_sibling, |
| 1034 | &sibling); |
| 1035 | } |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1036 | } |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 1037 | |
| 1038 | vlib_cli_output(vm, "Histogram Statistics:"); |
| 1039 | vlib_cli_output(vm, " Number of Elements visit per-quota:"); |
| 1040 | for (ii = 0; ii < N_ELTS_BUCKETS; ii++) |
| 1041 | { |
| 1042 | if (0 != fib_walk_work_nodes_visited[ii]) |
| 1043 | s = format(s, "%d:%d ", |
| 1044 | (ii * fib_walk_work_nodes_visisted_incr), |
| 1045 | fib_walk_work_nodes_visited[ii]); |
| 1046 | } |
| 1047 | vlib_cli_output(vm, " %v", s); |
| 1048 | vec_free(s); |
| 1049 | |
| 1050 | vlib_cli_output(vm, " Time consumed per-quota (Quota=%f usec):", quota*USEC); |
| 1051 | s = format(s, "0:%d ", fib_walk_work_time_taken[0]); |
| 1052 | for (ii = 1; ii < N_TIME_BUCKETS; ii++) |
| 1053 | { |
| 1054 | if (0 != fib_walk_work_time_taken[ii]) |
| 1055 | s = format(s, "%d:%d ", (u32)((((ii - N_TIME_BUCKETS/2) * |
| 1056 | (quota / TIME_INCREMENTS)) + quota) * |
| 1057 | USEC), |
| 1058 | fib_walk_work_time_taken[ii]); |
| 1059 | } |
| 1060 | vlib_cli_output(vm, " %v", s); |
| 1061 | vec_free(s); |
| 1062 | |
| 1063 | vlib_cli_output(vm, " Sleep Types:"); |
| 1064 | vlib_cli_output(vm, " Short Long:"); |
| 1065 | vlib_cli_output(vm, " %d %d:", |
| 1066 | fib_walk_sleep_lengths[FIB_WALK_SHORT_SLEEP], |
| 1067 | fib_walk_sleep_lengths[FIB_WALK_LONG_SLEEP]); |
| 1068 | |
| 1069 | vlib_cli_output(vm, " Number of Elements visited per-walk:"); |
| 1070 | for (ii = 0; ii < HISTOGRAM_VISITS_PER_WALK_N_BUCKETS; ii++) |
| 1071 | { |
| 1072 | if (0 != fib_walk_hist_vists_per_walk[ii]) |
| 1073 | s = format(s, "%d:%d ", |
| 1074 | ii*HISTOGRAM_VISITS_PER_WALK_INCR, |
| 1075 | fib_walk_hist_vists_per_walk[ii]); |
| 1076 | } |
| 1077 | vlib_cli_output(vm, " %v", s); |
| 1078 | vec_free(s); |
| 1079 | |
| 1080 | |
| 1081 | vlib_cli_output(vm, "Brief History (last %d walks):", HISTORY_N_WALKS); |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 1082 | ii = history_last_walk_pos - 1; |
| 1083 | if (ii < 0) |
| 1084 | ii = HISTORY_N_WALKS - 1; |
| 1085 | |
| 1086 | while (ii != history_last_walk_pos) |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 1087 | { |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 1088 | if (0 != fib_walk_history[ii].fwh_reason[0]) |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 1089 | { |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 1090 | u8 *s = NULL; |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 1091 | u32 jj; |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 1092 | |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 1093 | s = format(s, "[@%d]: %s:%d visits:%d duration:%.2f completed:%.2f ", |
| 1094 | ii, fib_node_type_get_name(fib_walk_history[ii].fwh_parent.fnp_type), |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 1095 | fib_walk_history[ii].fwh_parent.fnp_index, |
| 1096 | fib_walk_history[ii].fwh_n_visits, |
Neale Ranns | 8b37b87 | 2016-11-21 12:25:22 +0000 | [diff] [blame] | 1097 | fib_walk_history[ii].fwh_duration, |
| 1098 | fib_walk_history[ii].fwh_completed); |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 1099 | if (FIB_WALK_FLAG_SYNC & fib_walk_history[ii].fwh_flags) |
| 1100 | s = format(s, "sync, "); |
| 1101 | if (FIB_WALK_FLAG_ASYNC & fib_walk_history[ii].fwh_flags) |
| 1102 | s = format(s, "async, "); |
| 1103 | |
| 1104 | s = format(s, "reason:"); |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 1105 | jj = 0; |
| 1106 | while (0 != fib_walk_history[ii].fwh_reason[jj]) |
| 1107 | { |
Neale Ranns | 710071b | 2018-09-24 12:36:26 +0000 | [diff] [blame] | 1108 | s = format (s, "%U,", format_fib_node_bw_reason, |
| 1109 | fib_walk_history[ii].fwh_reason[jj]); |
Neale Ranns | 19c68d2 | 2016-12-07 15:38:14 +0000 | [diff] [blame] | 1110 | jj++; |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 1111 | } |
| 1112 | vlib_cli_output(vm, "%v", s); |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 1113 | } |
| 1114 | |
Neale Ranns | ad95b5d | 2016-11-10 20:35:14 +0000 | [diff] [blame] | 1115 | ii--; |
| 1116 | if (ii < 0) |
| 1117 | ii = HISTORY_N_WALKS - 1; |
| 1118 | } |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 1119 | |
Neale Ranns | 0bfe5d8 | 2016-08-25 15:29:12 +0100 | [diff] [blame] | 1120 | return (NULL); |
| 1121 | } |
| 1122 | |
| 1123 | VLIB_CLI_COMMAND (fib_walk_show_command, static) = { |
| 1124 | .path = "show fib walk", |
| 1125 | .short_help = "show fib walk", |
| 1126 | .function = fib_walk_show, |
| 1127 | }; |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 1128 | |
| 1129 | static clib_error_t * |
| 1130 | fib_walk_set_quota (vlib_main_t * vm, |
| 1131 | unformat_input_t * input, |
| 1132 | vlib_cli_command_t * cmd) |
| 1133 | { |
| 1134 | clib_error_t * error = NULL; |
| 1135 | f64 new_quota; |
| 1136 | |
| 1137 | if (unformat (input, "%f", &new_quota)) |
| 1138 | { |
| 1139 | quota = new_quota; |
| 1140 | } |
| 1141 | else |
| 1142 | { |
| 1143 | error = clib_error_return(0 , "Pass a float value"); |
| 1144 | } |
| 1145 | |
| 1146 | return (error); |
| 1147 | } |
| 1148 | |
| 1149 | VLIB_CLI_COMMAND (fib_walk_set_quota_command, static) = { |
| 1150 | .path = "set fib walk quota", |
| 1151 | .short_help = "set fib walk quota", |
| 1152 | .function = fib_walk_set_quota, |
| 1153 | }; |
| 1154 | |
| 1155 | static clib_error_t * |
| 1156 | fib_walk_set_histogram_elements_size (vlib_main_t * vm, |
| 1157 | unformat_input_t * input, |
| 1158 | vlib_cli_command_t * cmd) |
| 1159 | { |
| 1160 | clib_error_t * error = NULL; |
| 1161 | u32 new; |
| 1162 | |
| 1163 | if (unformat (input, "%d", &new)) |
| 1164 | { |
| 1165 | fib_walk_work_nodes_visisted_incr = new; |
| 1166 | } |
| 1167 | else |
| 1168 | { |
| 1169 | error = clib_error_return(0 , "Pass an int value"); |
| 1170 | } |
| 1171 | |
| 1172 | return (error); |
| 1173 | } |
| 1174 | |
| 1175 | VLIB_CLI_COMMAND (fib_walk_set_histogram_elements_size_command, static) = { |
| 1176 | .path = "set fib walk histogram elements size", |
| 1177 | .short_help = "set fib walk histogram elements size", |
| 1178 | .function = fib_walk_set_histogram_elements_size, |
| 1179 | }; |
| 1180 | |
| 1181 | static clib_error_t * |
| 1182 | fib_walk_clear (vlib_main_t * vm, |
| 1183 | unformat_input_t * input, |
| 1184 | vlib_cli_command_t * cmd) |
| 1185 | { |
Dave Barach | b7b9299 | 2018-10-17 10:38:51 -0400 | [diff] [blame] | 1186 | clib_memset(fib_walk_hist_vists_per_walk, 0, sizeof(fib_walk_hist_vists_per_walk)); |
| 1187 | clib_memset(fib_walk_history, 0, sizeof(fib_walk_history)); |
| 1188 | clib_memset(fib_walk_work_time_taken, 0, sizeof(fib_walk_work_time_taken)); |
| 1189 | clib_memset(fib_walk_work_nodes_visited, 0, sizeof(fib_walk_work_nodes_visited)); |
| 1190 | clib_memset(fib_walk_sleep_lengths, 0, sizeof(fib_walk_sleep_lengths)); |
Neale Ranns | 33a7dd5 | 2016-10-07 15:14:33 +0100 | [diff] [blame] | 1191 | |
| 1192 | return (NULL); |
| 1193 | } |
| 1194 | |
| 1195 | VLIB_CLI_COMMAND (fib_walk_clear_command, static) = { |
| 1196 | .path = "clear fib walk", |
| 1197 | .short_help = "clear fib walk", |
| 1198 | .function = fib_walk_clear, |
| 1199 | }; |
Neale Ranns | f12a83f | 2017-04-18 09:09:40 -0700 | [diff] [blame] | 1200 | |
| 1201 | void |
| 1202 | fib_walk_process_enable (void) |
| 1203 | { |
| 1204 | vlib_process_signal_event(vlib_get_main(), |
| 1205 | fib_walk_process_node.index, |
| 1206 | FIB_WALK_PROCESS_EVENT_ENABLE, |
| 1207 | 0); |
| 1208 | } |
| 1209 | |
| 1210 | void |
| 1211 | fib_walk_process_disable (void) |
| 1212 | { |
| 1213 | vlib_process_signal_event(vlib_get_main(), |
| 1214 | fib_walk_process_node.index, |
| 1215 | FIB_WALK_PROCESS_EVENT_DISABLE, |
| 1216 | 0); |
| 1217 | } |
| 1218 | |
| 1219 | static clib_error_t * |
| 1220 | fib_walk_process_enable_disable (vlib_main_t * vm, |
| 1221 | unformat_input_t * input, |
| 1222 | vlib_cli_command_t * cmd) |
| 1223 | { |
| 1224 | if (unformat (input, "enable")) |
| 1225 | { |
| 1226 | fib_walk_process_enable(); |
| 1227 | } |
| 1228 | else if (unformat (input, "disable")) |
| 1229 | { |
| 1230 | fib_walk_process_disable(); |
| 1231 | } |
| 1232 | else |
| 1233 | { |
| 1234 | return clib_error_return(0, "choose enable or disable"); |
| 1235 | } |
| 1236 | return (NULL); |
| 1237 | } |
| 1238 | |
| 1239 | VLIB_CLI_COMMAND (fib_walk_process_command, static) = { |
| 1240 | .path = "test fib-walk-process", |
| 1241 | .short_help = "test fib-walk-process [enable|disable]", |
| 1242 | .function = fib_walk_process_enable_disable, |
| 1243 | }; |