src/sys_fs_cgroup.c

   1 #ifdef HAVE_CONFIG_H
   2 #include <config.h>
   3 #endif
   4
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <inttypes.h>
   8 #include <sys/types.h>
   9 #include <dirent.h>
  10 #include <string.h>
  11
  12 #include "common.h"
  13 #include "appconfig.h"
  14 #include "procfile.h"
  15 #include "log.h"
  16 #include "rrd.h"
  17
  18 // ----------------------------------------------------------------------------
  19 // cgroup globals
  20
  21 static int cgroup_enable_cpuacct_stat = CONFIG_ONDEMAND_ONDEMAND;
  22 static int cgroup_enable_cpuacct_usage = CONFIG_ONDEMAND_ONDEMAND;
  23 static int cgroup_enable_memory = CONFIG_ONDEMAND_ONDEMAND;
  24 static int cgroup_enable_blkio = CONFIG_ONDEMAND_ONDEMAND;
  25 static int cgroup_enable_new_cgroups_detected_at_runtime = 1;
  26 static int cgroup_check_for_new_every = 10;
  27 static char *cgroup_cpuacct_base = NULL;
  28 static char *cgroup_blkio_base = NULL;
  29 static char *cgroup_memory_base = NULL;
  30
  31 static int cgroup_root_count = 0;
  32 static int cgroup_root_max = 50;
  33 static int cgroup_max_depth = 0;
  34
  35 void read_cgroup_plugin_configuration() {
  36         cgroup_check_for_new_every = config_get_number("plugin:cgroups", "check for new plugin every", cgroup_check_for_new_every);
  37
  38         cgroup_enable_cpuacct_stat = config_get_boolean_ondemand("plugin:cgroups", "enable cpuacct stat", cgroup_enable_cpuacct_stat);
  39         cgroup_enable_cpuacct_usage = config_get_boolean_ondemand("plugin:cgroups", "enable cpuacct usage", cgroup_enable_cpuacct_usage);
  40         cgroup_enable_memory = config_get_boolean_ondemand("plugin:cgroups", "enable memory", cgroup_enable_memory);
  41         cgroup_enable_blkio = config_get_boolean_ondemand("plugin:cgroups", "enable blkio", cgroup_enable_blkio);
  42
  43         char filename[FILENAME_MAX + 1];
  44         snprintf(filename, FILENAME_MAX, "%s%s", global_host_prefix, "/sys/fs/cgroup/cpuacct");
  45         cgroup_cpuacct_base = config_get("plugin:cgroups", "path to /sys/fs/cgroup/cpuacct", filename);
  46
  47         snprintf(filename, FILENAME_MAX, "%s%s", global_host_prefix, "/sys/fs/cgroup/blkio");
  48         cgroup_blkio_base = config_get("plugin:cgroups", "path to /sys/fs/cgroup/blkio", filename);
  49
  50         snprintf(filename, FILENAME_MAX, "%s%s", global_host_prefix, "/sys/fs/cgroup/memory");
  51         cgroup_memory_base = config_get("plugin:cgroups", "path to /sys/fs/cgroup/memory", filename);
  52
  53         cgroup_root_max = config_get_number("plugin:cgroups", "max cgroups to allow", cgroup_root_max);
  54         cgroup_max_depth = config_get_number("plugin:cgroups", "max cgroups depth to monitor", cgroup_max_depth);
  55
  56         cgroup_enable_new_cgroups_detected_at_runtime = config_get_boolean("plugin:cgroups", "enable new cgroups detected at run time", cgroup_enable_new_cgroups_detected_at_runtime);
  57 }
  58
  59 // ----------------------------------------------------------------------------
  60 // cgroup objects
  61
  62 struct blkio {
  63         int updated;
  64
  65         char *filename;
  66
  67         unsigned long long Read;
  68         unsigned long long Write;
  69         unsigned long long Sync;
  70         unsigned long long Async;
  71         unsigned long long Total;
  72 };
  73
  74 // https://www.kernel.org/doc/Documentation/cgroup-v1/memory.txt
  75 struct memory {
  76         int updated;
  77
  78         char *filename;
  79
  80         int has_dirty_swap;
  81
  82         unsigned long long cache;
  83         unsigned long long rss;
  84         unsigned long long rss_huge;
  85         unsigned long long mapped_file;
  86         unsigned long long writeback;
  87         unsigned long long dirty;
  88         unsigned long long swap;
  89         unsigned long long pgpgin;
  90         unsigned long long pgpgout;
  91         unsigned long long pgfault;
  92         unsigned long long pgmajfault;
  93 /*
  94         unsigned long long inactive_anon;
  95         unsigned long long active_anon;
  96         unsigned long long inactive_file;
  97         unsigned long long active_file;
  98         unsigned long long unevictable;
  99         unsigned long long hierarchical_memory_limit;
 100         unsigned long long total_cache;
 101         unsigned long long total_rss;
 102         unsigned long long total_rss_huge;
 103         unsigned long long total_mapped_file;
 104         unsigned long long total_writeback;
 105         unsigned long long total_dirty;
 106         unsigned long long total_swap;
 107         unsigned long long total_pgpgin;
 108         unsigned long long total_pgpgout;
 109         unsigned long long total_pgfault;
 110         unsigned long long total_pgmajfault;
 111         unsigned long long total_inactive_anon;
 112         unsigned long long total_active_anon;
 113         unsigned long long total_inactive_file;
 114         unsigned long long total_active_file;
 115         unsigned long long total_unevictable;
 116 */
 117 };
 118
 119 // https://www.kernel.org/doc/Documentation/cgroup-v1/cpuacct.txt
 120 struct cpuacct_stat {
 121         int updated;
 122
 123         char *filename;
 124
 125         unsigned long long user;
 126         unsigned long long system;
 127 };
 128
 129 // https://www.kernel.org/doc/Documentation/cgroup-v1/cpuacct.txt
 130 struct cpuacct_usage {
 131         int updated;
 132
 133         char *filename;
 134
 135         unsigned int cpus;
 136         unsigned long long *cpu_percpu;
 137 };
 138
 139 struct cgroup {
 140         int available;
 141         int enabled;
 142
 143         char *id;
 144         uint32_t hash;
 145
 146         char *name;
 147
 148         struct cpuacct_stat cpuacct_stat;
 149         struct cpuacct_usage cpuacct_usage;
 150
 151         struct memory memory;
 152
 153         struct blkio io_service_bytes;                          // bytes
 154         struct blkio io_serviced;                                       // operations
 155
 156         struct blkio throttle_io_service_bytes;         // bytes
 157         struct blkio throttle_io_serviced;                      // operations
 158
 159         struct blkio io_merged;                                         // operations
 160         struct blkio io_queued;                                         // operations
 161
 162         struct cgroup *next;
 163
 164 } *cgroup_root = NULL;
 165
 166 // ----------------------------------------------------------------------------
 167 // read values from /sys
 168
 169 void cgroup_read_cpuacct_stat(struct cpuacct_stat *cp) {
 170         static procfile *ff = NULL;
 171
 172         static uint32_t user_hash = 0;
 173         static uint32_t system_hash = 0;
 174
 175         if(unlikely(user_hash == 0)) {
 176                 user_hash = simple_hash("user");
 177                 system_hash = simple_hash("system");
 178         }
 179
 180         cp->updated = 0;
 181         if(cp->filename) {
 182                 ff = procfile_reopen(ff, cp->filename, NULL, PROCFILE_FLAG_DEFAULT);
 183                 if(!ff) return;
 184
 185                 ff = procfile_readall(ff);
 186                 if(!ff) return;
 187
 188                 unsigned long i, lines = procfile_lines(ff);
 189
 190                 if(lines < 1) {
 191                         error("File '%s' should have 1+ lines.", cp->filename);
 192                         return;
 193                 }
 194
 195                 for(i = 0; i < lines ; i++) {
 196                         char *s = procfile_lineword(ff, i, 0);
 197                         uint32_t hash = simple_hash(s);
 198
 199                         if(hash == user_hash && !strcmp(s, "user"))
 200                                 cp->user = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 201
 202                         else if(hash == system_hash && !strcmp(s, "system"))
 203                                 cp->system = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 204                 }
 205
 206                 cp->updated = 1;
 207
 208                 // fprintf(stderr, "READ '%s': user: %llu, system: %llu\n", cp->filename, cp->user, cp->system);
 209         }
 210 }
 211
 212 void cgroup_read_cpuacct_usage(struct cpuacct_usage *ca) {
 213         static procfile *ff = NULL;
 214
 215         ca->updated = 0;
 216         if(ca->filename) {
 217                 ff = procfile_reopen(ff, ca->filename, NULL, PROCFILE_FLAG_DEFAULT);
 218                 if(!ff) return;
 219
 220                 ff = procfile_readall(ff);
 221                 if(!ff) return;
 222
 223                 if(procfile_lines(ff) < 1) {
 224                         error("File '%s' should have 1+ lines but has %d.", ca->filename, procfile_lines(ff));
 225                         return;
 226                 }
 227
 228                 unsigned long i = procfile_linewords(ff, 0);
 229                 if(i <= 0) return;
 230
 231                 // we may have 1 more CPU reported
 232                 while(i > 0) {
 233                         char *s = procfile_lineword(ff, 0, i - 1);
 234                         if(!*s) i--;
 235                         else break;
 236                 }
 237
 238                 if(i != ca->cpus) {
 239                         free(ca->cpu_percpu);
 240                 }
 241                 ca->cpu_percpu = malloc(sizeof(unsigned long long) * i);
 242                 if(!ca->cpu_percpu)
 243                         fatal("Cannot allocate memory (%z bytes)", sizeof(unsigned long long) * i);
 244
 245                 ca->cpus = i;
 246
 247                 for(i = 0; i < ca->cpus ;i++) {
 248                         ca->cpu_percpu[i] = strtoull(procfile_lineword(ff, 0, i), NULL, 10);
 249                         // fprintf(stderr, "READ '%s': cpu%d/%d: %llu ('%s')\n", ca->filename, i, ca->cpus, ca->cpu_percpu[i], procfile_lineword(ff, 0, i));
 250                 }
 251
 252                 ca->updated = 1;
 253         }
 254 }
 255
 256 void cgroup_read_blkio(struct blkio *io) {
 257         static procfile *ff = NULL;
 258
 259         static uint32_t Read_hash = 0;
 260         static uint32_t Write_hash = 0;
 261         static uint32_t Sync_hash = 0;
 262         static uint32_t Async_hash = 0;
 263         static uint32_t Total_hash = 0;
 264
 265         if(unlikely(Read_hash == 0)) {
 266                 Read_hash = simple_hash("Read");
 267                 Write_hash = simple_hash("Write");
 268                 Sync_hash = simple_hash("Sync");
 269                 Async_hash = simple_hash("Async");
 270                 Total_hash = simple_hash("Total");
 271         }
 272
 273         io->updated = 0;
 274         if(io->filename) {
 275                 ff = procfile_reopen(ff, io->filename, NULL, PROCFILE_FLAG_DEFAULT);
 276                 if(!ff) return;
 277
 278                 ff = procfile_readall(ff);
 279                 if(!ff) return;
 280
 281                 unsigned long i, lines = procfile_lines(ff);
 282
 283                 if(lines < 1) {
 284                         error("File '%s' should have 1+ lines.", io->filename);
 285                         return;
 286                 }
 287
 288                 io->Read = 0;
 289                 io->Write = 0;
 290                 io->Sync = 0;
 291                 io->Async = 0;
 292                 io->Total = 0;
 293
 294                 for(i = 0; i < lines ; i++) {
 295                         char *s = procfile_lineword(ff, i, 1);
 296                         uint32_t hash = simple_hash(s);
 297
 298                         if(hash == Read_hash && !strcmp(s, "Read"))
 299                                 io->Read += strtoull(procfile_lineword(ff, i, 2), NULL, 10);
 300
 301                         else if(hash == Write_hash && !strcmp(s, "Write"))
 302                                 io->Write += strtoull(procfile_lineword(ff, i, 2), NULL, 10);
 303
 304                         else if(hash == Sync_hash && !strcmp(s, "Sync"))
 305                                 io->Sync += strtoull(procfile_lineword(ff, i, 2), NULL, 10);
 306
 307                         else if(hash == Async_hash && !strcmp(s, "Async"))
 308                                 io->Async += strtoull(procfile_lineword(ff, i, 2), NULL, 10);
 309
 310                         else if(hash == Total_hash && !strcmp(s, "Total"))
 311                                 io->Total += strtoull(procfile_lineword(ff, i, 2), NULL, 10);
 312                 }
 313
 314                 io->updated = 1;
 315                 // fprintf(stderr, "READ '%s': Read: %llu, Write: %llu, Sync: %llu, Async: %llu, Total: %llu\n", io->filename, io->Read, io->Write, io->Sync, io->Async, io->Total);
 316         }
 317 }
 318
 319 void cgroup_read_memory(struct memory *mem) {
 320         static procfile *ff = NULL;
 321
 322         static uint32_t cache_hash = 0;
 323         static uint32_t rss_hash = 0;
 324         static uint32_t rss_huge_hash = 0;
 325         static uint32_t mapped_file_hash = 0;
 326         static uint32_t writeback_hash = 0;
 327         static uint32_t dirty_hash = 0;
 328         static uint32_t swap_hash = 0;
 329         static uint32_t pgpgin_hash = 0;
 330         static uint32_t pgpgout_hash = 0;
 331         static uint32_t pgfault_hash = 0;
 332         static uint32_t pgmajfault_hash = 0;
 333 /*
 334         static uint32_t inactive_anon_hash = 0;
 335         static uint32_t active_anon_hash = 0;
 336         static uint32_t inactive_file_hash = 0;
 337         static uint32_t active_file_hash = 0;
 338         static uint32_t unevictable_hash = 0;
 339         static uint32_t hierarchical_memory_limit_hash = 0;
 340         static uint32_t total_cache_hash = 0;
 341         static uint32_t total_rss_hash = 0;
 342         static uint32_t total_rss_huge_hash = 0;
 343         static uint32_t total_mapped_file_hash = 0;
 344         static uint32_t total_writeback_hash = 0;
 345         static uint32_t total_dirty_hash = 0;
 346         static uint32_t total_swap_hash = 0;
 347         static uint32_t total_pgpgin_hash = 0;
 348         static uint32_t total_pgpgout_hash = 0;
 349         static uint32_t total_pgfault_hash = 0;
 350         static uint32_t total_pgmajfault_hash = 0;
 351         static uint32_t total_inactive_anon_hash = 0;
 352         static uint32_t total_active_anon_hash = 0;
 353         static uint32_t total_inactive_file_hash = 0;
 354         static uint32_t total_active_file_hash = 0;
 355         static uint32_t total_unevictable_hash = 0;
 356 */
 357         if(unlikely(cache_hash == 0)) {
 358                 cache_hash = simple_hash("cache");
 359                 rss_hash = simple_hash("rss");
 360                 rss_huge_hash = simple_hash("rss_huge");
 361                 mapped_file_hash = simple_hash("mapped_file");
 362                 writeback_hash = simple_hash("writeback");
 363                 dirty_hash = simple_hash("dirty");
 364                 swap_hash = simple_hash("swap");
 365                 pgpgin_hash = simple_hash("pgpgin");
 366                 pgpgout_hash = simple_hash("pgpgout");
 367                 pgfault_hash = simple_hash("pgfault");
 368                 pgmajfault_hash = simple_hash("pgmajfault");
 369 /*
 370                 inactive_anon_hash = simple_hash("inactive_anon");
 371                 active_anon_hash = simple_hash("active_anon");
 372                 inactive_file_hash = simple_hash("inactive_file");
 373                 active_file_hash = simple_hash("active_file");
 374                 unevictable_hash = simple_hash("unevictable");
 375                 hierarchical_memory_limit_hash = simple_hash("hierarchical_memory_limit");
 376                 total_cache_hash = simple_hash("total_cache");
 377                 total_rss_hash = simple_hash("total_rss");
 378                 total_rss_huge_hash = simple_hash("total_rss_huge");
 379                 total_mapped_file_hash = simple_hash("total_mapped_file");
 380                 total_writeback_hash = simple_hash("total_writeback");
 381                 total_dirty_hash = simple_hash("total_dirty");
 382                 total_swap_hash = simple_hash("total_swap");
 383                 total_pgpgin_hash = simple_hash("total_pgpgin");
 384                 total_pgpgout_hash = simple_hash("total_pgpgout");
 385                 total_pgfault_hash = simple_hash("total_pgfault");
 386                 total_pgmajfault_hash = simple_hash("total_pgmajfault");
 387                 total_inactive_anon_hash = simple_hash("total_inactive_anon");
 388                 total_active_anon_hash = simple_hash("total_active_anon");
 389                 total_inactive_file_hash = simple_hash("total_inactive_file");
 390                 total_active_file_hash = simple_hash("total_active_file");
 391                 total_unevictable_hash = simple_hash("total_unevictable");
 392 */
 393         }
 394
 395         mem->updated = 0;
 396         if(mem->filename) {
 397                 ff = procfile_reopen(ff, mem->filename, NULL, PROCFILE_FLAG_DEFAULT);
 398                 if(!ff) return;
 399
 400                 ff = procfile_readall(ff);
 401                 if(!ff) return;
 402
 403                 unsigned long i, lines = procfile_lines(ff);
 404
 405                 if(lines < 1) {
 406                         error("File '%s' should have 1+ lines.", mem->filename);
 407                         return;
 408                 }
 409
 410                 for(i = 0; i < lines ; i++) {
 411                         char *s = procfile_lineword(ff, i, 0);
 412                         uint32_t hash = simple_hash(s);
 413
 414                         if(hash == cache_hash && !strcmp(s, "cache"))
 415                                 mem->cache = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 416
 417                         else if(hash == rss_hash && !strcmp(s, "rss"))
 418                                 mem->rss = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 419
 420                         else if(hash == rss_huge_hash && !strcmp(s, "rss_huge"))
 421                                 mem->rss_huge = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 422
 423                         else if(hash == mapped_file_hash && !strcmp(s, "mapped_file"))
 424                                 mem->mapped_file = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 425
 426                         else if(hash == writeback_hash && !strcmp(s, "writeback"))
 427                                 mem->writeback = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 428
 429                         else if(hash == dirty_hash && !strcmp(s, "dirty")) {
 430                                 mem->dirty = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 431                                 mem->has_dirty_swap = 1;
 432                         }
 433
 434                         else if(hash == swap_hash && !strcmp(s, "swap")) {
 435                                 mem->swap = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 436                                 mem->has_dirty_swap = 1;
 437                         }
 438
 439                         else if(hash == pgpgin_hash && !strcmp(s, "pgpgin"))
 440                                 mem->pgpgin = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 441
 442                         else if(hash == pgpgout_hash && !strcmp(s, "pgpgout"))
 443                                 mem->pgpgout = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 444
 445                         else if(hash == pgfault_hash && !strcmp(s, "pgfault"))
 446                                 mem->pgfault = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 447
 448                         else if(hash == pgmajfault_hash && !strcmp(s, "pgmajfault"))
 449                                 mem->pgmajfault = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 450
 451 /*
 452                         else if(hash == inactive_anon_hash && !strcmp(s, "inactive_anon"))
 453                                 mem->inactive_anon = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 454
 455                         else if(hash == active_anon_hash && !strcmp(s, "active_anon"))
 456                                 mem->active_anon = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 457
 458                         else if(hash == inactive_file_hash && !strcmp(s, "inactive_file"))
 459                                 mem->inactive_file = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 460
 461                         else if(hash == active_file_hash && !strcmp(s, "active_file"))
 462                                 mem->active_file = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 463
 464                         else if(hash == unevictable_hash && !strcmp(s, "unevictable"))
 465                                 mem->unevictable = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 466
 467                         else if(hash == hierarchical_memory_limit_hash && !strcmp(s, "hierarchical_memory_limit"))
 468                                 mem->hierarchical_memory_limit = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 469
 470                 else if(hash == total_cache_hash && !strcmp(s, "total_cache"))
 471                                 mem->total_cache = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 472
 473                         else if(hash == total_rss_hash && !strcmp(s, "total_rss"))
 474                                 mem->total_rss = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 475
 476                         else if(hash == total_rss_huge_hash && !strcmp(s, "total_rss_huge"))
 477                                 mem->total_rss_huge = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 478
 479                         else if(hash == total_mapped_file_hash && !strcmp(s, "total_mapped_file"))
 480                                 mem->total_mapped_file = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 481
 482                         else if(hash == total_writeback_hash && !strcmp(s, "total_writeback"))
 483                                 mem->total_writeback = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 484
 485                         else if(hash == total_dirty_hash && !strcmp(s, "total_dirty"))
 486                                 mem->total_dirty = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 487
 488                         else if(hash == total_swap_hash && !strcmp(s, "total_swap"))
 489                                 mem->total_swap = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 490
 491                         else if(hash == total_pgpgin_hash && !strcmp(s, "total_pgpgin"))
 492                                 mem->total_pgpgin = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 493
 494                         else if(hash == total_pgpgout_hash && !strcmp(s, "total_pgpgout"))
 495                                 mem->total_pgpgout = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 496
 497                         else if(hash == total_pgfault_hash && !strcmp(s, "total_pgfault"))
 498                                 mem->total_pgfault = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 499
 500                         else if(hash == total_pgmajfault_hash && !strcmp(s, "total_pgmajfault"))
 501                                 mem->total_pgmajfault = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 502
 503                         else if(hash == total_inactive_anon_hash && !strcmp(s, "total_inactive_anon"))
 504                                 mem->total_inactive_anon = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 505
 506                         else if(hash == total_active_anon_hash && !strcmp(s, "total_active_anon"))
 507                                 mem->total_active_anon = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 508
 509                         else if(hash == total_inactive_file_hash && !strcmp(s, "total_inactive_file"))
 510                                 mem->total_inactive_file = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 511
 512                         else if(hash == total_active_file_hash && !strcmp(s, "total_active_file"))
 513                                 mem->total_active_file = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 514
 515                         else if(hash == total_unevictable_hash && !strcmp(s, "total_unevictable"))
 516                                 mem->total_unevictable = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 517 */
 518                 }
 519
 520                 // fprintf(stderr, "READ: '%s', cache: %llu, rss: %llu, rss_huge: %llu, mapped_file: %llu, writeback: %llu, dirty: %llu, swap: %llu, pgpgin: %llu, pgpgout: %llu, pgfault: %llu, pgmajfault: %llu, inactive_anon: %llu, active_anon: %llu, inactive_file: %llu, active_file: %llu, unevictable: %llu, hierarchical_memory_limit: %llu, total_cache: %llu, total_rss: %llu, total_rss_huge: %llu, total_mapped_file: %llu, total_writeback: %llu, total_dirty: %llu, total_swap: %llu, total_pgpgin: %llu, total_pgpgout: %llu, total_pgfault: %llu, total_pgmajfault: %llu, total_inactive_anon: %llu, total_active_anon: %llu, total_inactive_file: %llu, total_active_file: %llu, total_unevictable: %llu\n", mem->filename, mem->cache, mem->rss, mem->rss_huge, mem->mapped_file, mem->writeback, mem->dirty, mem->swap, mem->pgpgin, mem->pgpgout, mem->pgfault, mem->pgmajfault, mem->inactive_anon, mem->active_anon, mem->inactive_file, mem->active_file, mem->unevictable, mem->hierarchical_memory_limit, mem->total_cache, mem->total_rss, mem->total_rss_huge, mem->total_mapped_file, mem->total_writeback, mem->total_dirty, mem->total_swap, mem->total_pgpgin, mem->total_pgpgout, mem->total_pgfault, mem->total_pgmajfault, mem->total_inactive_anon, mem->total_active_anon, mem->total_inactive_file, mem->total_active_file, mem->total_unevictable);
 521
 522                 mem->updated = 1;
 523         }
 524 }
 525
 526 void cgroup_read(struct cgroup *cg) {
 527         cgroup_read_cpuacct_stat(&cg->cpuacct_stat);
 528         cgroup_read_cpuacct_usage(&cg->cpuacct_usage);
 529         cgroup_read_memory(&cg->memory);
 530         cgroup_read_blkio(&cg->io_service_bytes);
 531         cgroup_read_blkio(&cg->io_serviced);
 532         cgroup_read_blkio(&cg->throttle_io_service_bytes);
 533         cgroup_read_blkio(&cg->throttle_io_serviced);
 534         cgroup_read_blkio(&cg->io_merged);
 535         cgroup_read_blkio(&cg->io_queued);
 536 }
 537
 538 void read_all_cgroups(struct cgroup *cg) {
 539         struct cgroup *i;
 540
 541         for(i = cg; i ; i = i->next)
 542                 cgroup_read(i);
 543 }
 544
 545 // ----------------------------------------------------------------------------
 546 // add/remove/find cgroup objects
 547
 548 struct cgroup *cgroup_add(const char *id) {
 549         if(cgroup_root_count >= cgroup_root_max) {
 550                 info("Maximum number of cgroups reached (%d). Not adding cgroup '%s'", cgroup_root_count, id);
 551                 return NULL;
 552         }
 553
 554         int def = cgroup_enable_new_cgroups_detected_at_runtime;
 555         const char *name = id;
 556         if(!*name) {
 557                 name = "/";
 558
 559                 // disable by default the host cgroup
 560                 def = 0;
 561         }
 562         else {
 563                 if(*name == '/') name++;
 564
 565                 // disable by default the parent cgroup
 566                 // for known cgroup managers
 567                 if(!strcmp(name, "lxc") || !strcmp(name, "docker"))
 568                         def = 0;
 569         }
 570
 571         char option[FILENAME_MAX + 1];
 572         snprintf(option, FILENAME_MAX, "enable cgroup %s", name);
 573         if(!config_get_boolean("plugin:cgroups", option, def))
 574                 return NULL;
 575
 576         struct cgroup *cg = calloc(1, sizeof(struct cgroup));
 577         if(cg) {
 578                 cg->id = strdup(id);
 579                 if(!cg->id) fatal("Cannot allocate memory for cgroup '%s'", id);
 580
 581                 cg->hash = simple_hash(cg->id);
 582
 583                 cg->name = strdup(name);
 584                 if(!cg->name) fatal("Cannot allocate memory for cgroup '%s'", id);
 585
 586                 if(!cgroup_root)
 587                         cgroup_root = cg;
 588                 else {
 589                         // append it
 590                         struct cgroup *e;
 591                         for(e = cgroup_root; e->next ;e = e->next) ;
 592                         e->next = cg;
 593                 }
 594
 595                 cgroup_root_count++;
 596
 597                 // fprintf(stderr, " > added cgroup No %d, with id '%s' (%u) and name '%s'\n", cgroup_root_count, cg->id, cg->hash, cg->name);
 598         }
 599         else fatal("Cannot allocate memory for cgroup '%s'", id);
 600
 601         return cg;
 602 }
 603
 604 void cgroup_remove(struct cgroup *cg) {
 605         if(cg == cgroup_root) {
 606                 cgroup_root = cg->next;
 607         }
 608         else {
 609                 struct cgroup *e;
 610                 for(e = cgroup_root; e->next ;e = e->next)
 611                         if(unlikely(e->next == cg)) break;
 612
 613                 if(e->next != cg) {
 614                         error("Cannot find cgroup '%s' in list of cgroups", cg->id);
 615                 }
 616                 else {
 617                         e->next = cg->next;
 618                         cg->next = NULL;
 619                 }
 620         }
 621
 622         free(cg->cpuacct_usage.cpu_percpu);
 623
 624         free(cg->cpuacct_stat.filename);
 625         free(cg->cpuacct_usage.filename);
 626         free(cg->memory.filename);
 627         free(cg->io_service_bytes.filename);
 628         free(cg->io_serviced.filename);
 629         free(cg->throttle_io_service_bytes.filename);
 630         free(cg->throttle_io_serviced.filename);
 631         free(cg->io_merged.filename);
 632         free(cg->io_queued.filename);
 633
 634         free(cg->id);
 635         free(cg->name);
 636         free(cg);
 637 }
 638
 639 // find if a given cgroup exists
 640 struct cgroup *cgroup_find(const char *id) {
 641         uint32_t hash = simple_hash(id);
 642
 643         // fprintf(stderr, " > searching for '%s' (%u)\n", id, hash);
 644
 645         struct cgroup *cg;
 646         for(cg = cgroup_root; cg ; cg = cg->next) {
 647                 if(hash == cg->hash && strcmp(id, cg->id) == 0)
 648                         break;
 649         }
 650
 651         return cg;
 652 }
 653
 654 // ----------------------------------------------------------------------------
 655 // detect running cgroups
 656
 657 // callback for find_file_in_subdirs()
 658 void found_dir_in_subdir(const char *dir) {
 659         // fprintf(stderr, "found dir '%s'\n", dir);
 660
 661         struct cgroup *cg = cgroup_find(dir);
 662         if(!cg) {
 663                 if(*dir && cgroup_max_depth > 0) {
 664                         int depth = 0;
 665                         const char *s;
 666
 667                         for(s = dir; *s ;s++)
 668                                 if(unlikely(*s == '/'))
 669                                         depth++;
 670
 671                         if(depth > cgroup_max_depth) {
 672                                 info("cgroup '%s' is too deep (%d, while max is %d)", dir, depth, cgroup_max_depth);
 673                                 return;
 674                         }
 675                 }
 676                 cg = cgroup_add(dir);
 677         }
 678
 679         if(cg) cg->available = 1;
 680 }
 681
 682 void find_dir_in_subdirs(const char *base, const char *this, void (*callback)(const char *)) {
 683         if(!this) this = base;
 684         size_t dirlen = strlen(this), baselen = strlen(base);
 685
 686         DIR *dir = opendir(this);
 687         if(!dir) return;
 688
 689         callback(&this[baselen]);
 690
 691         struct dirent *de = NULL;
 692         while((de = readdir(dir))) {
 693                 if(de->d_type == DT_DIR
 694                         && (
 695                                 (de->d_name[0] == '.' && de->d_name[1] == '\0')
 696                                 || (de->d_name[0] == '.' && de->d_name[1] == '.' && de->d_name[2] == '\0')
 697                                 ))
 698                         continue;
 699
 700                 // fprintf(stderr, "examining '%s/%s'\n", this, de->d_name);
 701
 702                 if(de->d_type == DT_DIR) {
 703                         char *s = malloc(dirlen + strlen(de->d_name) + 2);
 704                         if(s) {
 705                                 strcpy(s, this);
 706                                 strcat(s, "/");
 707                                 strcat(s, de->d_name);
 708                                 find_dir_in_subdirs(base, s, callback);
 709                                 free(s);
 710                         }
 711                 }
 712         }
 713
 714         closedir(dir);
 715 }
 716
 717 void mark_all_cgroups_as_not_available() {
 718         struct cgroup *cg;
 719
 720         // mark all as not available
 721         for(cg = cgroup_root; cg ; cg = cg->next)
 722                 cg->available = 0;
 723 }
 724
 725 struct cgroup *find_all_cgroups() {
 726
 727         mark_all_cgroups_as_not_available();
 728
 729         if(cgroup_enable_cpuacct_stat || cgroup_enable_cpuacct_usage)
 730                 find_dir_in_subdirs(cgroup_cpuacct_base, NULL, found_dir_in_subdir);
 731
 732         if(cgroup_enable_blkio)
 733                 find_dir_in_subdirs(cgroup_blkio_base, NULL, found_dir_in_subdir);
 734
 735         if(cgroup_enable_memory)
 736                 find_dir_in_subdirs(cgroup_memory_base, NULL, found_dir_in_subdir);
 737
 738         struct cgroup *cg;
 739         for(cg = cgroup_root; cg ; cg = cg->next) {
 740                 // fprintf(stderr, " >>> CGROUP '%s' (%u - %s) with name '%s'\n", cg->id, cg->hash, cg->available?"available":"stopped", cg->name);
 741
 742                 if(!cg->available) {
 743                         cgroup_remove(cg);
 744                         continue;
 745                 }
 746
 747                 // check for newly added cgroups
 748                 // and update the filenames they read
 749                 char filename[FILENAME_MAX + 1];
 750                 if(cgroup_enable_cpuacct_stat && !cg->cpuacct_stat.filename) {
 751                         snprintf(filename, FILENAME_MAX, "%s%s/cpuacct.stat", cgroup_cpuacct_base, cg->id);
 752                         cg->cpuacct_stat.filename = strdup(filename);
 753                 }
 754                 if(cgroup_enable_cpuacct_usage && !cg->cpuacct_usage.filename) {
 755                         snprintf(filename, FILENAME_MAX, "%s%s/cpuacct.usage_percpu", cgroup_cpuacct_base, cg->id);
 756                         cg->cpuacct_usage.filename = strdup(filename);
 757                 }
 758                 if(cgroup_enable_memory && !cg->memory.filename) {
 759                         snprintf(filename, FILENAME_MAX, "%s%s/memory.stat", cgroup_memory_base, cg->id);
 760                         cg->memory.filename = strdup(filename);
 761                 }
 762                 if(cgroup_enable_blkio) {
 763                         if(!cg->io_service_bytes.filename) {
 764                                 snprintf(filename, FILENAME_MAX, "%s%s/blkio.io_service_bytes", cgroup_blkio_base, cg->id);
 765                                 cg->io_service_bytes.filename = strdup(filename);
 766                         }
 767                         if(!cg->io_serviced.filename) {
 768                                 snprintf(filename, FILENAME_MAX, "%s%s/blkio.io_serviced", cgroup_blkio_base, cg->id);
 769                                 cg->io_serviced.filename = strdup(filename);
 770                         }
 771                         if(!cg->throttle_io_service_bytes.filename) {
 772                                 snprintf(filename, FILENAME_MAX, "%s%s/blkio.throttle.io_service_bytes", cgroup_blkio_base, cg->id);
 773                                 cg->throttle_io_service_bytes.filename = strdup(filename);
 774                         }
 775                         if(!cg->throttle_io_serviced.filename) {
 776                                 snprintf(filename, FILENAME_MAX, "%s%s/blkio.throttle.io_serviced", cgroup_blkio_base, cg->id);
 777                                 cg->throttle_io_serviced.filename = strdup(filename);
 778                         }
 779                         if(!cg->io_merged.filename) {
 780                                 snprintf(filename, FILENAME_MAX, "%s%s/blkio.io_merged", cgroup_blkio_base, cg->id);
 781                                 cg->io_merged.filename = strdup(filename);
 782                         }
 783                         if(!cg->io_queued.filename) {
 784                                 snprintf(filename, FILENAME_MAX, "%s%s/blkio.io_queued", cgroup_blkio_base, cg->id);
 785                                 cg->io_queued.filename = strdup(filename);
 786                         }
 787                 }
 788         }
 789
 790         return cgroup_root;
 791 }
 792
 793 // ----------------------------------------------------------------------------
 794 // generate charts
 795
 796 #define CHART_TITLE_MAX 300
 797
 798 void update_cgroup_charts(int update_every) {
 799         char type[RRD_ID_LENGTH_MAX + 1];
 800         char title[CHART_TITLE_MAX + 1];
 801
 802         struct cgroup *cg;
 803         RRDSET *st;
 804
 805         for(cg = cgroup_root; cg ; cg = cg->next) {
 806                 if(!cg->available) continue;
 807
 808                 if(cg->id[0] == '\0')
 809                         strcpy(type, "cgroup_host");
 810                 else if(cg->id[0] == '/')
 811                         snprintf(type, RRD_ID_LENGTH_MAX, "cgroup%s", cg->id);
 812                 else
 813                         snprintf(type, RRD_ID_LENGTH_MAX, "cgroup_%s", cg->id);
 814
 815                 netdata_fix_chart_id(type);
 816
 817                 if(cg->cpuacct_stat.updated) {
 818                         st = rrdset_find_bytype(type, "cpu");
 819                         if(!st) {
 820                                 snprintf(title, CHART_TITLE_MAX, "CPU Usage for cgroup %s", cg->name);
 821                                 st = rrdset_create(type, "cpu", NULL, "cpu", "cgroup.cpu", title, "%", 40000, update_every, RRDSET_TYPE_STACKED);
 822
 823                                 rrddim_add(st, "user", NULL, 100, hz, RRDDIM_INCREMENTAL);
 824                                 rrddim_add(st, "system", NULL, 100, hz, RRDDIM_INCREMENTAL);
 825                         }
 826                         else rrdset_next(st);
 827
 828                         rrddim_set(st, "user", cg->cpuacct_stat.user);
 829                         rrddim_set(st, "system", cg->cpuacct_stat.system);
 830                         rrdset_done(st);
 831                 }
 832
 833                 if(cg->cpuacct_usage.updated) {
 834                         char id[RRD_ID_LENGTH_MAX + 1];
 835                         unsigned int i;
 836
 837                         st = rrdset_find_bytype(type, "cpu_per_core");
 838                         if(!st) {
 839                                 snprintf(title, CHART_TITLE_MAX, "CPU Usage Per Core for cgroup %s", cg->name);
 840                                 st = rrdset_create(type, "cpu_per_core", NULL, "cpu", "cgroup.cpu_per_core", title, "%", 40100, update_every, RRDSET_TYPE_STACKED);
 841
 842                                 for(i = 0; i < cg->cpuacct_usage.cpus ;i++) {
 843                                         snprintf(id, CHART_TITLE_MAX, "cpu%d", i);
 844                                         rrddim_add(st, id, NULL, 100, 1000000, RRDDIM_INCREMENTAL);
 845                                 }
 846                         }
 847                         else rrdset_next(st);
 848
 849                         for(i = 0; i < cg->cpuacct_usage.cpus ;i++) {
 850                                 snprintf(id, CHART_TITLE_MAX, "cpu%d", i);
 851                                 rrddim_set(st, id, cg->cpuacct_usage.cpu_percpu[i]);
 852                         }
 853                         rrdset_done(st);
 854                 }
 855
 856                 if(cg->memory.updated) {
 857                         if(cg->memory.cache + cg->memory.rss + cg->memory.rss_huge + cg->memory.mapped_file > 0) {
 858                                 st = rrdset_find_bytype(type, "mem");
 859                                 if(!st) {
 860                                         snprintf(title, CHART_TITLE_MAX, "Memory Usage for cgroup %s", cg->name);
 861                                         st = rrdset_create(type, "mem", NULL, "mem", "cgroup.mem", title, "MB", 40200, update_every,
 862                                                            RRDSET_TYPE_STACKED);
 863
 864                                         rrddim_add(st, "cache", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
 865                                         rrddim_add(st, "rss", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
 866                                         if(cg->memory.has_dirty_swap)
 867                                                 rrddim_add(st, "swap", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
 868                                         rrddim_add(st, "rss_huge", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
 869                                         rrddim_add(st, "mapped_file", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
 870                                 }
 871                                 else rrdset_next(st);
 872
 873                                 rrddim_set(st, "cache", cg->memory.cache);
 874                                 rrddim_set(st, "rss", cg->memory.rss);
 875                                 if(cg->memory.has_dirty_swap)
 876                                         rrddim_set(st, "swap", cg->memory.swap);
 877                                 rrddim_set(st, "rss_huge", cg->memory.rss_huge);
 878                                 rrddim_set(st, "mapped_file", cg->memory.mapped_file);
 879                                 rrdset_done(st);
 880                         }
 881
 882                         st = rrdset_find_bytype(type, "writeback");
 883                         if(!st) {
 884                                 snprintf(title, CHART_TITLE_MAX, "Writeback Memory for cgroup %s", cg->name);
 885                                 st = rrdset_create(type, "writeback", NULL, "mem", "cgroup.writeback", title, "MB", 40300,
 886                                                    update_every, RRDSET_TYPE_AREA);
 887
 888                                 if(cg->memory.has_dirty_swap)
 889                                         rrddim_add(st, "dirty", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
 890                                 rrddim_add(st, "writeback", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
 891                         }
 892                         else rrdset_next(st);
 893
 894                         if(cg->memory.has_dirty_swap)
 895                                 rrddim_set(st, "dirty", cg->memory.dirty);
 896                         rrddim_set(st, "writeback", cg->memory.writeback);
 897                         rrdset_done(st);
 898
 899                         if(cg->memory.pgpgin + cg->memory.pgpgout > 0) {
 900                                 st = rrdset_find_bytype(type, "mem_activity");
 901                                 if(!st) {
 902                                         snprintf(title, CHART_TITLE_MAX, "Memory Activity for cgroup %s", cg->name);
 903                                         st = rrdset_create(type, "mem_activity", NULL, "mem", "cgroup.mem_activity", title, "MB/s",
 904                                                            40400, update_every, RRDSET_TYPE_LINE);
 905
 906                                         rrddim_add(st, "pgpgin", "in", sysconf(_SC_PAGESIZE), 1024 * 1024, RRDDIM_INCREMENTAL);
 907                                         rrddim_add(st, "pgpgout", "out", -sysconf(_SC_PAGESIZE), 1024 * 1024, RRDDIM_INCREMENTAL);
 908                                 }
 909                                 else rrdset_next(st);
 910
 911                                 rrddim_set(st, "pgpgin", cg->memory.pgpgin);
 912                                 rrddim_set(st, "pgpgout", cg->memory.pgpgout);
 913                                 rrdset_done(st);
 914                         }
 915
 916                         if(cg->memory.pgfault + cg->memory.pgmajfault > 0) {
 917                                 st = rrdset_find_bytype(type, "pgfaults");
 918                                 if(!st) {
 919                                         snprintf(title, CHART_TITLE_MAX, "Memory Page Faults for cgroup %s", cg->name);
 920                                         st = rrdset_create(type, "pgfaults", NULL, "mem", "cgroup.pgfaults", title, "MB/s", 40500,
 921                                                            update_every, RRDSET_TYPE_LINE);
 922
 923                                         rrddim_add(st, "pgfault", NULL, sysconf(_SC_PAGESIZE), 1024 * 1024, RRDDIM_INCREMENTAL);
 924                                         rrddim_add(st, "pgmajfault", "swap", -sysconf(_SC_PAGESIZE), 1024 * 1024, RRDDIM_INCREMENTAL);
 925                                 }
 926                                 else rrdset_next(st);
 927
 928                                 rrddim_set(st, "pgfault", cg->memory.pgfault);
 929                                 rrddim_set(st, "pgmajfault", cg->memory.pgmajfault);
 930                                 rrdset_done(st);
 931                         }
 932                 }
 933
 934                 if(cg->io_service_bytes.updated && cg->io_service_bytes.Read + cg->io_service_bytes.Write > 0) {
 935                         st = rrdset_find_bytype(type, "io");
 936                         if(!st) {
 937                                 snprintf(title, CHART_TITLE_MAX, "I/O Bandwidth (all disks) for cgroup %s", cg->name);
 938                                 st = rrdset_create(type, "io", NULL, "disk", "cgroup.io", title, "KB/s", 41200,
 939                                                    update_every, RRDSET_TYPE_LINE);
 940
 941                                 rrddim_add(st, "read", NULL, 1, 1024, RRDDIM_INCREMENTAL);
 942                                 rrddim_add(st, "write", NULL, -1, 1024, RRDDIM_INCREMENTAL);
 943                         }
 944                         else rrdset_next(st);
 945
 946                         rrddim_set(st, "read", cg->io_service_bytes.Read);
 947                         rrddim_set(st, "write", cg->io_service_bytes.Write);
 948                         rrdset_done(st);
 949                 }
 950
 951                 if(cg->io_serviced.updated && cg->io_serviced.Read + cg->io_serviced.Write > 0) {
 952                         st = rrdset_find_bytype(type, "serviced_ops");
 953                         if(!st) {
 954                                 snprintf(title, CHART_TITLE_MAX, "Serviced I/O Operations (all disks) for cgroup %s", cg->name);
 955                                 st = rrdset_create(type, "serviced_ops", NULL, "disk", "cgroup.serviced_ops", title, "operations/s", 41200,
 956                                                    update_every, RRDSET_TYPE_LINE);
 957
 958                                 rrddim_add(st, "read", NULL, 1, 1, RRDDIM_INCREMENTAL);
 959                                 rrddim_add(st, "write", NULL, -1, 1, RRDDIM_INCREMENTAL);
 960                         }
 961                         else rrdset_next(st);
 962
 963                         rrddim_set(st, "read", cg->io_serviced.Read);
 964                         rrddim_set(st, "write", cg->io_serviced.Write);
 965                         rrdset_done(st);
 966                 }
 967
 968                 if(cg->throttle_io_service_bytes.updated && cg->throttle_io_service_bytes.Read + cg->throttle_io_service_bytes.Write > 0) {
 969                         st = rrdset_find_bytype(type, "io");
 970                         if(!st) {
 971                                 snprintf(title, CHART_TITLE_MAX, "Throttle I/O Bandwidth (all disks) for cgroup %s", cg->name);
 972                                 st = rrdset_create(type, "io", NULL, "disk", "cgroup.io", title, "KB/s", 41200,
 973                                                    update_every, RRDSET_TYPE_LINE);
 974
 975                                 rrddim_add(st, "read", NULL, 1, 1024, RRDDIM_INCREMENTAL);
 976                                 rrddim_add(st, "write", NULL, -1, 1024, RRDDIM_INCREMENTAL);
 977                         }
 978                         else rrdset_next(st);
 979
 980                         rrddim_set(st, "read", cg->throttle_io_service_bytes.Read);
 981                         rrddim_set(st, "write", cg->throttle_io_service_bytes.Write);
 982                         rrdset_done(st);
 983                 }
 984
 985
 986                 if(cg->throttle_io_serviced.updated && cg->throttle_io_serviced.Read + cg->throttle_io_serviced.Write > 0) {
 987                         st = rrdset_find_bytype(type, "throttle_serviced_ops");
 988                         if(!st) {
 989                                 snprintf(title, CHART_TITLE_MAX, "Throttle Serviced I/O Operations (all disks) for cgroup %s", cg->name);
 990                                 st = rrdset_create(type, "throttle_serviced_ops", NULL, "disk", "cgroup.throttle_serviced_ops", title, "operations/s", 41200,
 991                                                    update_every, RRDSET_TYPE_LINE);
 992
 993                                 rrddim_add(st, "read", NULL, 1, 1, RRDDIM_INCREMENTAL);
 994                                 rrddim_add(st, "write", NULL, -1, 1, RRDDIM_INCREMENTAL);
 995                         }
 996                         else rrdset_next(st);
 997
 998                         rrddim_set(st, "read", cg->throttle_io_serviced.Read);
 999                         rrddim_set(st, "write", cg->throttle_io_serviced.Write);
1000                         rrdset_done(st);
1001                 }
1002
1003                 if(cg->io_queued.updated) {
1004                         st = rrdset_find_bytype(type, "queued_ops");
1005                         if(!st) {
1006                                 snprintf(title, CHART_TITLE_MAX, "Queued I/O Operations (all disks) for cgroup %s", cg->name);
1007                                 st = rrdset_create(type, "queued_ops", NULL, "disk", "cgroup.queued_ops", title, "operations", 42000,
1008                                                    update_every, RRDSET_TYPE_LINE);
1009
1010                                 rrddim_add(st, "read", NULL, 1, 1, RRDDIM_ABSOLUTE);
1011                                 rrddim_add(st, "write", NULL, -1, 1, RRDDIM_ABSOLUTE);
1012                         }
1013                         else rrdset_next(st);
1014
1015                         rrddim_set(st, "read", cg->io_queued.Read);
1016                         rrddim_set(st, "write", cg->io_queued.Write);
1017                         rrdset_done(st);
1018                 }
1019
1020                 if(cg->io_merged.updated && cg->io_merged.Read + cg->io_merged.Write > 0) {
1021                         st = rrdset_find_bytype(type, "merged_ops");
1022                         if(!st) {
1023                                 snprintf(title, CHART_TITLE_MAX, "Merged I/O Operations (all disks) for cgroup %s", cg->name);
1024                                 st = rrdset_create(type, "merged_ops", NULL, "disk", "cgroup.merged_ops", title, "operations/s", 42100,
1025                                                    update_every, RRDSET_TYPE_LINE);
1026
1027                                 rrddim_add(st, "read", NULL, 1, 1024, RRDDIM_INCREMENTAL);
1028                                 rrddim_add(st, "write", NULL, -1, 1024, RRDDIM_INCREMENTAL);
1029                         }
1030                         else rrdset_next(st);
1031
1032                         rrddim_set(st, "read", cg->io_merged.Read);
1033                         rrddim_set(st, "write", cg->io_merged.Write);
1034                         rrdset_done(st);
1035                 }
1036         }
1037 }
1038
1039 // ----------------------------------------------------------------------------
1040 // cgroups main
1041
1042 int do_sys_fs_cgroup(int update_every, unsigned long long dt) {
1043         static int cgroup_global_config_read = 0;
1044         static time_t last_run = 0;
1045         time_t now = time(NULL);
1046
1047         if(dt) {};
1048
1049         if(unlikely(!cgroup_global_config_read)) {
1050                 read_cgroup_plugin_configuration();
1051                 cgroup_global_config_read = 1;
1052         }
1053
1054         if(unlikely(cgroup_enable_new_cgroups_detected_at_runtime && now - last_run > cgroup_check_for_new_every)) {
1055                 find_all_cgroups();
1056                 last_run = now;
1057         }
1058
1059         read_all_cgroups(cgroup_root);
1060         update_cgroup_charts(update_every);
1061
1062         return 0;
1063 }