| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | #include "plugin_proc.h" |
| 4 | |
| 5 | #include <sys/sem.h> |
| 6 | #include <sys/msg.h> |
| 7 | #include <sys/shm.h> |
| 8 | |
| 9 | #define _COMMON_PLUGIN_NAME PLUGIN_PROC_NAME |
| 10 | #define _COMMON_PLUGIN_MODULE_NAME "ipc" |
| 11 | #include "../common-contexts/common-contexts.h" |
| 12 | |
| 13 | #ifndef SEMVMX |
| 14 | #define SEMVMX 32767 /* <= 32767 semaphore maximum value */ |
| 15 | #endif |
| 16 | |
| 17 | /* Some versions of libc only define IPC_INFO when __USE_GNU is defined. */ |
| 18 | #ifndef IPC_INFO |
| 19 | #define IPC_INFO 3 |
| 20 | #endif |
| 21 | |
| 22 | struct ipc_limits { |
| 23 | uint64_t shmmni; /* max number of segments */ |
| 24 | uint64_t shmmax; /* max segment size */ |
| 25 | uint64_t shmall; /* max total shared memory */ |
| 26 | uint64_t shmmin; /* min segment size */ |
| 27 | |
| 28 | int semmni; /* max number of arrays */ |
| 29 | int semmsl; /* max semaphores per array */ |
| 30 | int semmns; /* max semaphores system wide */ |
| 31 | int semopm; /* max ops per semop call */ |
| 32 | unsigned int semvmx; /* semaphore max value (constant) */ |
| 33 | |
| 34 | int msgmni; /* max queues system wide */ |
| 35 | size_t msgmax; /* max size of message */ |
| 36 | int msgmnb; /* default max size of queue */ |
| 37 | }; |
| 38 | |
| 39 | struct ipc_status { |
| 40 | int semusz; /* current number of arrays */ |
| 41 | int semaem; /* current semaphores system wide */ |
| 42 | }; |
| 43 | |
| 44 | /* |
| 45 | * The last arg of semctl is a union semun, but where is it defined? X/OPEN |
| 46 | * tells us to define it ourselves, but until recently Linux include files |
| 47 | * would also define it. |
| 48 | */ |
| 49 | #ifndef HAVE_UNION_SEMUN |
| 50 | /* according to X/OPEN we have to define it ourselves */ |
| 51 | union semun { |
| 52 | int val; |
| 53 | struct semid_ds *buf; |
| 54 | unsigned short int *array; |
| 55 | struct seminfo *__buf; |
| 56 | }; |
| 57 | #endif |
| 58 | |
| 59 | struct message_queue { |
| 60 | unsigned long long id; |
| 61 | int found; |
| 62 | |
| 63 | RRDDIM *rd_messages; |
| 64 | RRDDIM *rd_bytes; |
| 65 | unsigned long long messages; |
| 66 | unsigned long long bytes; |
| 67 | |
| 68 | struct message_queue * next; |
| 69 | }; |
| 70 | |
| 71 | struct shm_stats { |
| 72 | unsigned long long segments; |
| 73 | unsigned long long bytes; |
| 74 | }; |
| 75 | |
| 76 | static inline int ipc_sem_get_limits(struct ipc_limits *lim) { |
| 77 | static procfile *ff = NULL; |
| 78 | static int error_shown = 0; |
| 79 | static char filename[FILENAME_MAX + 1] = ""; |
| 80 | |
| 81 | if(unlikely(!filename[0])) |
| 82 | snprintfz(filename, FILENAME_MAX, "%s/proc/sys/kernel/sem", netdata_configured_host_prefix); |
| 83 | |
| 84 | if(unlikely(!ff)) { |
| 85 | ff = procfile_open(filename, NULL, PROCFILE_FLAG_DEFAULT); |
| 86 | if(unlikely(!ff)) { |
| 87 | if(unlikely(!error_shown)) { |
| 88 | collector_error("IPC: Cannot open file '%s'.", filename); |
| 89 | error_shown = 1; |
| 90 | } |
| 91 | goto ipc; |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | ff = procfile_readall(ff); |
| 96 | if(unlikely(!ff)) { |
| 97 | if(unlikely(!error_shown)) { |
| 98 | collector_error("IPC: Cannot read file '%s'.", filename); |
| 99 | error_shown = 1; |
| 100 | } |
| 101 | goto ipc; |
| 102 | } |
| 103 | |
| 104 | if(procfile_lines(ff) >= 1 && procfile_linewords(ff, 0) >= 4) { |
| 105 | lim->semvmx = SEMVMX; |
| 106 | lim->semmsl = str2i(procfile_lineword(ff, 0, 0)); |
| 107 | lim->semmns = str2i(procfile_lineword(ff, 0, 1)); |
| 108 | lim->semopm = str2i(procfile_lineword(ff, 0, 2)); |
| 109 | lim->semmni = str2i(procfile_lineword(ff, 0, 3)); |
| 110 | return 0; |
| 111 | } |
| 112 | else { |
| 113 | if(unlikely(!error_shown)) { |
| 114 | collector_error("IPC: Invalid content in file '%s'.", filename); |
| 115 | error_shown = 1; |
| 116 | } |
| 117 | goto ipc; |
| 118 | } |
| 119 | |
| 120 | ipc: |
| 121 | // cannot do it from the file |
| 122 | // query IPC |
| 123 | { |
| 124 | struct seminfo seminfo = {.semmni = 0}; |
| 125 | union semun arg = {.array = (ushort *) &seminfo}; |
| 126 | |
| 127 | if(unlikely(semctl(0, 0, IPC_INFO, arg) < 0)) { |
| 128 | collector_error("IPC: Failed to read '%s' and request IPC_INFO with semctl().", filename); |
| 129 | goto error; |
| 130 | } |
| 131 | |
| 132 | lim->semvmx = SEMVMX; |
| 133 | lim->semmni = seminfo.semmni; |
| 134 | lim->semmsl = seminfo.semmsl; |
| 135 | lim->semmns = seminfo.semmns; |
| 136 | lim->semopm = seminfo.semopm; |
| 137 | return 0; |
| 138 | } |
| 139 | |
| 140 | error: |
| 141 | lim->semvmx = 0; |
| 142 | lim->semmni = 0; |
| 143 | lim->semmsl = 0; |
| 144 | lim->semmns = 0; |
| 145 | lim->semopm = 0; |
| 146 | return -1; |
| 147 | } |
| 148 | |
| 149 | /* |
| 150 | printf ("------ Semaphore Limits --------\n"); |
| 151 | printf ("max number of arrays = %d\n", limits.semmni); |
| 152 | printf ("max semaphores per array = %d\n", limits.semmsl); |
| 153 | printf ("max semaphores system wide = %d\n", limits.semmns); |
| 154 | printf ("max ops per semop call = %d\n", limits.semopm); |
| 155 | printf ("semaphore max value = %u\n", limits.semvmx); |
| 156 | |
| 157 | printf ("------ Semaphore Status --------\n"); |
| 158 | printf ("used arrays = %d\n", status.semusz); |
| 159 | printf ("allocated semaphores = %d\n", status.semaem); |
| 160 | */ |
| 161 | |
| 162 | static inline int ipc_sem_get_status(struct ipc_status *st) { |
| 163 | struct seminfo seminfo; |
| 164 | union semun arg; |
| 165 | |
| 166 | arg.array = (ushort *) (void *) &seminfo; |
| 167 | |
| 168 | if(unlikely(semctl (0, 0, SEM_INFO, arg) < 0)) { |
| 169 | /* kernel not configured for semaphores */ |
| 170 | static int error_shown = 0; |
| 171 | if(unlikely(!error_shown)) { |
| 172 | collector_error("IPC: kernel is not configured for semaphores"); |
| 173 | error_shown = 1; |
| 174 | } |
| 175 | st->semusz = 0; |
| 176 | st->semaem = 0; |
| 177 | return -1; |
| 178 | } |
| 179 | |
| 180 | st->semusz = seminfo.semusz; |
| 181 | st->semaem = seminfo.semaem; |
| 182 | return 0; |
| 183 | } |
| 184 | |
| 185 | static int ipc_msq_get_info(const char *msg_filename, struct message_queue **message_queue_root) { |
| 186 | static procfile *ff; |
| 187 | struct message_queue *msq; |
| 188 | |
| 189 | if(unlikely(!ff)) { |
| 190 | ff = procfile_open(msg_filename, " \t:", PROCFILE_FLAG_DEFAULT); |
| 191 | if(unlikely(!ff)) return 1; |
| 192 | } |
| 193 | |
| 194 | ff = procfile_readall(ff); |
| 195 | if(unlikely(!ff)) return 1; |
| 196 | |
| 197 | size_t lines = procfile_lines(ff); |
| 198 | size_t words = 0; |
| 199 | |
| 200 | if(unlikely(lines < 2)) { |
| 201 | collector_error("Cannot read %s. Expected 2 or more lines, read %zu.", procfile_filename(ff), lines); |
| 202 | return 1; |
| 203 | } |
| 204 | |
| 205 | // loop through all lines except the first and the last ones |
| 206 | size_t l; |
| 207 | for(l = 1; l < lines - 1; l++) { |
| 208 | words = procfile_linewords(ff, l); |
| 209 | if(unlikely(words < 2)) continue; |
| 210 | if(unlikely(words < 14)) { |
| 211 | collector_error("Cannot read %s line. Expected 14 params, read %zu.", procfile_filename(ff), words); |
| 212 | continue; |
| 213 | } |
| 214 | |
| 215 | // find the id in the linked list or create a new structure |
| 216 | int found = 0; |
| 217 | |
| 218 | unsigned long long id = str2ull(procfile_lineword(ff, l, 1), NULL); |
| 219 | for(msq = *message_queue_root; msq ; msq = msq->next) { |
| 220 | if(unlikely(id == msq->id)) { |
| 221 | found = 1; |
| 222 | break; |
| 223 | } |
| 224 | } |
| 225 | |
| 226 | if(unlikely(!found)) { |
| 227 | msq = callocz(1, sizeof(struct message_queue)); |
| 228 | msq->next = *message_queue_root; |
| 229 | *message_queue_root = msq; |
| 230 | msq->id = id; |
| 231 | } |
| 232 | |
| 233 | msq->messages = str2ull(procfile_lineword(ff, l, 4), NULL); |
| 234 | msq->bytes = str2ull(procfile_lineword(ff, l, 3), NULL); |
| 235 | msq->found = 1; |
| 236 | } |
| 237 | |
| 238 | return 0; |
| 239 | } |
| 240 | |
| 241 | static int ipc_shm_get_info(const char *shm_filename, struct shm_stats *shm) { |
| 242 | static procfile *ff; |
| 243 | |
| 244 | if(unlikely(!ff)) { |
| 245 | ff = procfile_open(shm_filename, " \t:", PROCFILE_FLAG_DEFAULT); |
| 246 | if(unlikely(!ff)) return 1; |
| 247 | } |
| 248 | |
| 249 | ff = procfile_readall(ff); |
| 250 | if(unlikely(!ff)) return 1; |
| 251 | |
| 252 | size_t lines = procfile_lines(ff); |
| 253 | size_t words = 0; |
| 254 | |
| 255 | if(unlikely(lines < 2)) { |
| 256 | collector_error("Cannot read %s. Expected 2 or more lines, read %zu.", procfile_filename(ff), lines); |
| 257 | return 1; |
| 258 | } |
| 259 | |
| 260 | shm->segments = 0; |
| 261 | shm->bytes = 0; |
| 262 | |
| 263 | // loop through all lines except the first and the last ones |
| 264 | size_t l; |
| 265 | for(l = 1; l < lines - 1; l++) { |
| 266 | words = procfile_linewords(ff, l); |
| 267 | if(unlikely(words < 2)) continue; |
| 268 | if(unlikely(words < 16)) { |
| 269 | collector_error("Cannot read %s line. Expected 16 params, read %zu.", procfile_filename(ff), words); |
| 270 | continue; |
| 271 | } |
| 272 | |
| 273 | shm->segments++; |
| 274 | shm->bytes += str2ull(procfile_lineword(ff, l, 3), NULL); |
| 275 | } |
| 276 | |
| 277 | return 0; |
| 278 | } |
| 279 | |
| 280 | static const RRDVAR_ACQUIRED *arrays_max = NULL, *semaphores_max = NULL; |
| 281 | void proc_ipc_cleanup(void) { |
| 282 | if(arrays_max) |
| 283 | rrdvar_host_variable_release(localhost, arrays_max); |
| 284 | |
| 285 | if(semaphores_max) |
| 286 | rrdvar_host_variable_release(localhost, semaphores_max); |
| 287 | } |
| 288 | |
| 289 | int do_proc_ipc(int update_every, usec_t dt) { |
| 290 | (void)dt; |
| 291 | |
| 292 | static int do_sem = -1, do_msg = -1, do_shm = -1; |
| 293 | static int read_limits_next = -1; |
| 294 | static struct ipc_limits limits; |
| 295 | static struct ipc_status status; |
| 296 | static RRDSET *st_arrays = NULL; |
| 297 | static RRDDIM *rd_arrays = NULL; |
| 298 | static const char *msg_filename = NULL; |
| 299 | static struct message_queue *message_queue_root = NULL; |
| 300 | static long long dimensions_limit; |
| 301 | static const char *shm_filename = NULL; |
| 302 | |
| 303 | if(unlikely(do_sem == -1)) { |
| 304 | do_msg = inicfg_get_boolean(&netdata_config, "plugin:proc:ipc", "message queues", CONFIG_BOOLEAN_YES); |
| 305 | do_sem = inicfg_get_boolean(&netdata_config, "plugin:proc:ipc", "semaphore totals", CONFIG_BOOLEAN_YES); |
| 306 | do_shm = inicfg_get_boolean(&netdata_config, "plugin:proc:ipc", "shared memory totals", CONFIG_BOOLEAN_YES); |
| 307 | |
| 308 | char filename[FILENAME_MAX + 1]; |
| 309 | |
| 310 | snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/proc/sysvipc/msg"); |
| 311 | msg_filename = inicfg_get(&netdata_config, "plugin:proc:ipc", "msg filename to monitor", filename); |
| 312 | |
| 313 | snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/proc/sysvipc/shm"); |
| 314 | shm_filename = inicfg_get(&netdata_config, "plugin:proc:ipc", "shm filename to monitor", filename); |
| 315 | |
| 316 | dimensions_limit = inicfg_get_number(&netdata_config, "plugin:proc:ipc", "max dimensions in memory allowed", 50); |
| 317 | |
| 318 | // make sure it works |
| 319 | if(ipc_sem_get_limits(&limits) == -1) { |
| 320 | collector_error("unable to fetch semaphore limits"); |
| 321 | do_sem = CONFIG_BOOLEAN_NO; |
| 322 | } |
| 323 | else if(ipc_sem_get_status(&status) == -1) { |
| 324 | collector_error("unable to fetch semaphore statistics"); |
| 325 | do_sem = CONFIG_BOOLEAN_NO; |
| 326 | } |
| 327 | else { |
| 328 | // create the chart |
| 329 | if(unlikely(!st_arrays)) { |
| 330 | st_arrays = rrdset_create_localhost( |
| 331 | "system" |
| 332 | , "ipc_semaphore_arrays" |
| 333 | , NULL |
| 334 | , "ipc semaphores" |
| 335 | , NULL |
| 336 | , "IPC Semaphore Arrays" |
| 337 | , "arrays" |
| 338 | , PLUGIN_PROC_NAME |
| 339 | , "ipc" |
| 340 | , NETDATA_CHART_PRIO_SYSTEM_IPC_SEM_ARRAYS |
| 341 | , localhost->rrd_update_every |
| 342 | , RRDSET_TYPE_AREA |
| 343 | ); |
| 344 | rd_arrays = rrddim_add(st_arrays, "arrays", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE); |
| 345 | } |
| 346 | |
| 347 | // variables |
| 348 | semaphores_max = rrdvar_host_variable_add_and_acquire(localhost, "ipc_semaphores_max"); |
| 349 | arrays_max = rrdvar_host_variable_add_and_acquire(localhost, "ipc_semaphores_arrays_max"); |
| 350 | } |
| 351 | |
| 352 | struct stat stbuf; |
| 353 | if (stat(msg_filename, &stbuf)) { |
| 354 | do_msg = CONFIG_BOOLEAN_NO; |
| 355 | } |
| 356 | |
| 357 | if(unlikely(do_sem == CONFIG_BOOLEAN_NO && do_msg == CONFIG_BOOLEAN_NO)) { |
| 358 | collector_error("ipc module disabled"); |
| 359 | return 1; |
| 360 | } |
| 361 | } |
| 362 | |
| 363 | if(likely(do_sem != CONFIG_BOOLEAN_NO)) { |
| 364 | if(unlikely(read_limits_next < 0)) { |
| 365 | if(unlikely(ipc_sem_get_limits(&limits) == -1)) { |
| 366 | collector_error("Unable to fetch semaphore limits."); |
| 367 | } |
| 368 | else { |
| 369 | if(semaphores_max) |
| 370 | rrdvar_host_variable_set(localhost, semaphores_max, limits.semmns); |
| 371 | if(arrays_max) |
| 372 | rrdvar_host_variable_set(localhost, arrays_max, limits.semmni); |
| 373 | |
| 374 | st_arrays->red = limits.semmni; |
| 375 | |
| 376 | read_limits_next = 60 / update_every; |
| 377 | } |
| 378 | } |
| 379 | else |
| 380 | read_limits_next--; |
| 381 | |
| 382 | if(unlikely(ipc_sem_get_status(&status) == -1)) { |
| 383 | collector_error("Unable to get semaphore statistics"); |
| 384 | return 0; |
| 385 | } |
| 386 | |
| 387 | common_semaphore_ipc(status.semaem, limits.semmns, "ipc", localhost->rrd_update_every); |
| 388 | |
| 389 | rrddim_set_by_pointer(st_arrays, rd_arrays, status.semusz); |
| 390 | rrdset_done(st_arrays); |
| 391 | } |
| 392 | |
| 393 | if(likely(do_msg != CONFIG_BOOLEAN_NO)) { |
| 394 | static RRDSET *st_msq_messages = NULL, *st_msq_bytes = NULL; |
| 395 | |
| 396 | int ret = ipc_msq_get_info(msg_filename, &message_queue_root); |
| 397 | |
| 398 | if(!ret && message_queue_root) { |
| 399 | if(unlikely(!st_msq_messages)) |
| 400 | st_msq_messages = rrdset_create_localhost( |
| 401 | "system" |
| 402 | , "message_queue_messages" |
| 403 | , NULL |
| 404 | , "ipc message queues" |
| 405 | , NULL |
| 406 | , "IPC Message Queue Number of Messages" |
| 407 | , "messages" |
| 408 | , PLUGIN_PROC_NAME |
| 409 | , "ipc" |
| 410 | , NETDATA_CHART_PRIO_SYSTEM_IPC_MSQ_MESSAGES |
| 411 | , update_every |
| 412 | , RRDSET_TYPE_STACKED |
| 413 | ); |
| 414 | |
| 415 | if(unlikely(!st_msq_bytes)) |
| 416 | st_msq_bytes = rrdset_create_localhost( |
| 417 | "system" |
| 418 | , "message_queue_bytes" |
| 419 | , NULL |
| 420 | , "ipc message queues" |
| 421 | , NULL |
| 422 | , "IPC Message Queue Used Bytes" |
| 423 | , "bytes" |
| 424 | , PLUGIN_PROC_NAME |
| 425 | , "ipc" |
| 426 | , NETDATA_CHART_PRIO_SYSTEM_IPC_MSQ_SIZE |
| 427 | , update_every |
| 428 | , RRDSET_TYPE_STACKED |
| 429 | ); |
| 430 | |
| 431 | struct message_queue *msq = message_queue_root, *msq_prev = NULL; |
| 432 | while(likely(msq)){ |
| 433 | if(likely(msq->found)) { |
| 434 | if(unlikely(!msq->rd_messages || !msq->rd_bytes)) { |
| 435 | char id[RRD_ID_LENGTH_MAX + 1]; |
| 436 | snprintfz(id, RRD_ID_LENGTH_MAX, "%llu", msq->id); |
| 437 | if(likely(!msq->rd_messages)) msq->rd_messages = rrddim_add(st_msq_messages, id, NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE); |
| 438 | if(likely(!msq->rd_bytes)) msq->rd_bytes = rrddim_add(st_msq_bytes, id, NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE); |
| 439 | } |
| 440 | |
| 441 | rrddim_set_by_pointer(st_msq_messages, msq->rd_messages, msq->messages); |
| 442 | rrddim_set_by_pointer(st_msq_bytes, msq->rd_bytes, msq->bytes); |
| 443 | |
| 444 | msq->found = 0; |
| 445 | } |
| 446 | else { |
| 447 | rrddim_is_obsolete___safe_from_collector_thread(st_msq_messages, msq->rd_messages); |
| 448 | rrddim_is_obsolete___safe_from_collector_thread(st_msq_bytes, msq->rd_bytes); |
| 449 | |
| 450 | // remove message queue from the linked list |
| 451 | if(!msq_prev) |
| 452 | message_queue_root = msq->next; |
| 453 | else |
| 454 | msq_prev->next = msq->next; |
| 455 | freez(msq); |
| 456 | msq = NULL; |
| 457 | } |
| 458 | if(likely(msq)) { |
| 459 | msq_prev = msq; |
| 460 | msq = msq->next; |
| 461 | } |
| 462 | else if(!msq_prev) |
| 463 | msq = message_queue_root; |
| 464 | else |
| 465 | msq = msq_prev->next; |
| 466 | } |
| 467 | |
| 468 | rrdset_done(st_msq_messages); |
| 469 | rrdset_done(st_msq_bytes); |
| 470 | |
| 471 | long long dimensions_num = rrdset_number_of_dimensions(st_msq_messages); |
| 472 | |
| 473 | if(unlikely(dimensions_num > dimensions_limit)) { |
| 474 | collector_info("Message queue statistics has been disabled"); |
| 475 | collector_info("There are %lld dimensions in memory but limit was set to %lld", dimensions_num, dimensions_limit); |
| 476 | rrdset_is_obsolete___safe_from_collector_thread(st_msq_messages); |
| 477 | rrdset_is_obsolete___safe_from_collector_thread(st_msq_bytes); |
| 478 | st_msq_messages = NULL; |
| 479 | st_msq_bytes = NULL; |
| 480 | do_msg = CONFIG_BOOLEAN_NO; |
| 481 | } |
| 482 | else if(unlikely(!message_queue_root)) { |
| 483 | collector_info("Making chart %s (%s) obsolete since it does not have any dimensions", rrdset_name(st_msq_messages), rrdset_id(st_msq_messages)); |
| 484 | rrdset_is_obsolete___safe_from_collector_thread(st_msq_messages); |
| 485 | st_msq_messages = NULL; |
| 486 | |
| 487 | collector_info("Making chart %s (%s) obsolete since it does not have any dimensions", rrdset_name(st_msq_bytes), rrdset_id(st_msq_bytes)); |
| 488 | rrdset_is_obsolete___safe_from_collector_thread(st_msq_bytes); |
| 489 | st_msq_bytes = NULL; |
| 490 | } |
| 491 | } |
| 492 | } |
| 493 | |
| 494 | if(likely(do_shm != CONFIG_BOOLEAN_NO)) { |
| 495 | static RRDSET *st_shm_segments = NULL, *st_shm_bytes = NULL; |
| 496 | static RRDDIM *rd_shm_segments = NULL, *rd_shm_bytes = NULL; |
| 497 | struct shm_stats shm; |
| 498 | |
| 499 | if(!ipc_shm_get_info(shm_filename, &shm)) { |
| 500 | if(unlikely(!st_shm_segments)) { |
| 501 | st_shm_segments = rrdset_create_localhost( |
| 502 | "system" |
| 503 | , "shared_memory_segments" |
| 504 | , NULL |
| 505 | , "ipc shared memory" |
| 506 | , NULL |
| 507 | , "IPC Shared Memory Number of Segments" |
| 508 | , "segments" |
| 509 | , PLUGIN_PROC_NAME |
| 510 | , "ipc" |
| 511 | , NETDATA_CHART_PRIO_SYSTEM_IPC_SHARED_MEM_SEGS |
| 512 | , update_every |
| 513 | , RRDSET_TYPE_STACKED |
| 514 | ); |
| 515 | |
| 516 | rd_shm_segments = rrddim_add(st_shm_segments, "segments", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE); |
| 517 | } |
| 518 | |
| 519 | rrddim_set_by_pointer(st_shm_segments, rd_shm_segments, shm.segments); |
| 520 | rrdset_done(st_shm_segments); |
| 521 | |
| 522 | if(unlikely(!st_shm_bytes)) { |
| 523 | st_shm_bytes = rrdset_create_localhost( |
| 524 | "system" |
| 525 | , "shared_memory_bytes" |
| 526 | , NULL |
| 527 | , "ipc shared memory" |
| 528 | , NULL |
| 529 | , "IPC Shared Memory Used Bytes" |
| 530 | , "bytes" |
| 531 | , PLUGIN_PROC_NAME |
| 532 | , "ipc" |
| 533 | , NETDATA_CHART_PRIO_SYSTEM_IPC_SHARED_MEM_SIZE |
| 534 | , update_every |
| 535 | , RRDSET_TYPE_STACKED |
| 536 | ); |
| 537 | |
| 538 | rd_shm_bytes = rrddim_add(st_shm_bytes, "bytes", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE); |
| 539 | } |
| 540 | |
| 541 | rrddim_set_by_pointer(st_shm_bytes, rd_shm_bytes, shm.bytes); |
| 542 | rrdset_done(st_shm_bytes); |
| 543 | } |
| 544 | } |
| 545 | |
| 546 | return 0; |
| 547 | } |