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 #include "main.h"
  18 #include "popen.h"
  19
  20 // ----------------------------------------------------------------------------
  21 // cgroup globals
  22
  23 static int cgroup_enable_cpuacct_stat = CONFIG_ONDEMAND_ONDEMAND;
  24 static int cgroup_enable_cpuacct_usage = CONFIG_ONDEMAND_ONDEMAND;
  25 static int cgroup_enable_memory = CONFIG_ONDEMAND_ONDEMAND;
  26 static int cgroup_enable_blkio = CONFIG_ONDEMAND_ONDEMAND;
  27 static int cgroup_enable_new_cgroups_detected_at_runtime = 1;
  28 static int cgroup_check_for_new_every = 10;
  29 static char *cgroup_cpuacct_base = NULL;
  30 static char *cgroup_blkio_base = NULL;
  31 static char *cgroup_memory_base = NULL;
  32
  33 static int cgroup_root_count = 0;
  34 static int cgroup_root_max = 50;
  35 static int cgroup_max_depth = 0;
  36
  37 void read_cgroup_plugin_configuration() {
  38         cgroup_check_for_new_every = config_get_number("plugin:cgroups", "check for new plugin every", cgroup_check_for_new_every);
  39
  40         cgroup_enable_cpuacct_stat = config_get_boolean_ondemand("plugin:cgroups", "enable cpuacct stat", cgroup_enable_cpuacct_stat);
  41         cgroup_enable_cpuacct_usage = config_get_boolean_ondemand("plugin:cgroups", "enable cpuacct usage", cgroup_enable_cpuacct_usage);
  42         cgroup_enable_memory = config_get_boolean_ondemand("plugin:cgroups", "enable memory", cgroup_enable_memory);
  43         cgroup_enable_blkio = config_get_boolean_ondemand("plugin:cgroups", "enable blkio", cgroup_enable_blkio);
  44
  45         char filename[FILENAME_MAX + 1];
  46         snprintf(filename, FILENAME_MAX, "%s%s", global_host_prefix, "/sys/fs/cgroup/cpuacct");
  47         cgroup_cpuacct_base = config_get("plugin:cgroups", "path to /sys/fs/cgroup/cpuacct", filename);
  48
  49         snprintf(filename, FILENAME_MAX, "%s%s", global_host_prefix, "/sys/fs/cgroup/blkio");
  50         cgroup_blkio_base = config_get("plugin:cgroups", "path to /sys/fs/cgroup/blkio", filename);
  51
  52         snprintf(filename, FILENAME_MAX, "%s%s", global_host_prefix, "/sys/fs/cgroup/memory");
  53         cgroup_memory_base = config_get("plugin:cgroups", "path to /sys/fs/cgroup/memory", filename);
  54
  55         cgroup_root_max = config_get_number("plugin:cgroups", "max cgroups to allow", cgroup_root_max);
  56         cgroup_max_depth = config_get_number("plugin:cgroups", "max cgroups depth to monitor", cgroup_max_depth);
  57
  58         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);
  59 }
  60
  61 // ----------------------------------------------------------------------------
  62 // cgroup objects
  63
  64 struct blkio {
  65         int updated;
  66
  67         char *filename;
  68
  69         unsigned long long Read;
  70         unsigned long long Write;
  71         unsigned long long Sync;
  72         unsigned long long Async;
  73         unsigned long long Total;
  74 };
  75
  76 // https://www.kernel.org/doc/Documentation/cgroup-v1/memory.txt
  77 struct memory {
  78         int updated;
  79
  80         char *filename;
  81
  82         int has_dirty_swap;
  83
  84         unsigned long long cache;
  85         unsigned long long rss;
  86         unsigned long long rss_huge;
  87         unsigned long long mapped_file;
  88         unsigned long long writeback;
  89         unsigned long long dirty;
  90         unsigned long long swap;
  91         unsigned long long pgpgin;
  92         unsigned long long pgpgout;
  93         unsigned long long pgfault;
  94         unsigned long long pgmajfault;
  95 /*
  96         unsigned long long inactive_anon;
  97         unsigned long long active_anon;
  98         unsigned long long inactive_file;
  99         unsigned long long active_file;
 100         unsigned long long unevictable;
 101         unsigned long long hierarchical_memory_limit;
 102         unsigned long long total_cache;
 103         unsigned long long total_rss;
 104         unsigned long long total_rss_huge;
 105         unsigned long long total_mapped_file;
 106         unsigned long long total_writeback;
 107         unsigned long long total_dirty;
 108         unsigned long long total_swap;
 109         unsigned long long total_pgpgin;
 110         unsigned long long total_pgpgout;
 111         unsigned long long total_pgfault;
 112         unsigned long long total_pgmajfault;
 113         unsigned long long total_inactive_anon;
 114         unsigned long long total_active_anon;
 115         unsigned long long total_inactive_file;
 116         unsigned long long total_active_file;
 117         unsigned long long total_unevictable;
 118 */
 119 };
 120
 121 // https://www.kernel.org/doc/Documentation/cgroup-v1/cpuacct.txt
 122 struct cpuacct_stat {
 123         int updated;
 124
 125         char *filename;
 126
 127         unsigned long long user;
 128         unsigned long long system;
 129 };
 130
 131 // https://www.kernel.org/doc/Documentation/cgroup-v1/cpuacct.txt
 132 struct cpuacct_usage {
 133         int updated;
 134
 135         char *filename;
 136
 137         unsigned int cpus;
 138         unsigned long long *cpu_percpu;
 139 };
 140
 141 struct cgroup {
 142         int available;
 143         int enabled;
 144
 145         char *id;
 146         uint32_t hash;
 147
 148         char *name;
 149
 150         struct cpuacct_stat cpuacct_stat;
 151         struct cpuacct_usage cpuacct_usage;
 152
 153         struct memory memory;
 154
 155         struct blkio io_service_bytes;                          // bytes
 156         struct blkio io_serviced;                                       // operations
 157
 158         struct blkio throttle_io_service_bytes;         // bytes
 159         struct blkio throttle_io_serviced;                      // operations
 160
 161         struct blkio io_merged;                                         // operations
 162         struct blkio io_queued;                                         // operations
 163
 164         struct cgroup *next;
 165
 166 } *cgroup_root = NULL;
 167
 168 // ----------------------------------------------------------------------------
 169 // read values from /sys
 170
 171 void cgroup_read_cpuacct_stat(struct cpuacct_stat *cp) {
 172         static procfile *ff = NULL;
 173
 174         static uint32_t user_hash = 0;
 175         static uint32_t system_hash = 0;
 176
 177         if(unlikely(user_hash == 0)) {
 178                 user_hash = simple_hash("user");
 179                 system_hash = simple_hash("system");
 180         }
 181
 182         cp->updated = 0;
 183         if(cp->filename) {
 184                 ff = procfile_reopen(ff, cp->filename, NULL, PROCFILE_FLAG_DEFAULT);
 185                 if(!ff) return;
 186
 187                 ff = procfile_readall(ff);
 188                 if(!ff) return;
 189
 190                 unsigned long i, lines = procfile_lines(ff);
 191
 192                 if(lines < 1) {
 193                         error("File '%s' should have 1+ lines.", cp->filename);
 194                         return;
 195                 }
 196
 197                 for(i = 0; i < lines ; i++) {
 198                         char *s = procfile_lineword(ff, i, 0);
 199                         uint32_t hash = simple_hash(s);
 200
 201                         if(hash == user_hash && !strcmp(s, "user"))
 202                                 cp->user = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 203
 204                         else if(hash == system_hash && !strcmp(s, "system"))
 205                                 cp->system = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 206                 }
 207
 208                 cp->updated = 1;
 209
 210                 // fprintf(stderr, "READ '%s': user: %llu, system: %llu\n", cp->filename, cp->user, cp->system);
 211         }
 212 }
 213
 214 void cgroup_read_cpuacct_usage(struct cpuacct_usage *ca) {
 215         static procfile *ff = NULL;
 216
 217         ca->updated = 0;
 218         if(ca->filename) {
 219                 ff = procfile_reopen(ff, ca->filename, NULL, PROCFILE_FLAG_DEFAULT);
 220                 if(!ff) return;
 221
 222                 ff = procfile_readall(ff);
 223                 if(!ff) return;
 224
 225                 if(procfile_lines(ff) < 1) {
 226                         error("File '%s' should have 1+ lines but has %d.", ca->filename, procfile_lines(ff));
 227                         return;
 228                 }
 229
 230                 unsigned long i = procfile_linewords(ff, 0);
 231                 if(i <= 0) return;
 232
 233                 // we may have 1 more CPU reported
 234                 while(i > 0) {
 235                         char *s = procfile_lineword(ff, 0, i - 1);
 236                         if(!*s) i--;
 237                         else break;
 238                 }
 239
 240                 if(i != ca->cpus) {
 241                         free(ca->cpu_percpu);
 242                 }
 243                 ca->cpu_percpu = malloc(sizeof(unsigned long long) * i);
 244                 if(!ca->cpu_percpu)
 245                         fatal("Cannot allocate memory (%z bytes)", sizeof(unsigned long long) * i);
 246
 247                 ca->cpus = i;
 248
 249                 for(i = 0; i < ca->cpus ;i++) {
 250                         ca->cpu_percpu[i] = strtoull(procfile_lineword(ff, 0, i), NULL, 10);
 251                         // fprintf(stderr, "READ '%s': cpu%d/%d: %llu ('%s')\n", ca->filename, i, ca->cpus, ca->cpu_percpu[i], procfile_lineword(ff, 0, i));
 252                 }
 253
 254                 ca->updated = 1;
 255         }
 256 }
 257
 258 void cgroup_read_blkio(struct blkio *io) {
 259         static procfile *ff = NULL;
 260
 261         static uint32_t Read_hash = 0;
 262         static uint32_t Write_hash = 0;
 263         static uint32_t Sync_hash = 0;
 264         static uint32_t Async_hash = 0;
 265         static uint32_t Total_hash = 0;
 266
 267         if(unlikely(Read_hash == 0)) {
 268                 Read_hash = simple_hash("Read");
 269                 Write_hash = simple_hash("Write");
 270                 Sync_hash = simple_hash("Sync");
 271                 Async_hash = simple_hash("Async");
 272                 Total_hash = simple_hash("Total");
 273         }
 274
 275         io->updated = 0;
 276         if(io->filename) {
 277                 ff = procfile_reopen(ff, io->filename, NULL, PROCFILE_FLAG_DEFAULT);
 278                 if(!ff) return;
 279
 280                 ff = procfile_readall(ff);
 281                 if(!ff) return;
 282
 283                 unsigned long i, lines = procfile_lines(ff);
 284
 285                 if(lines < 1) {
 286                         error("File '%s' should have 1+ lines.", io->filename);
 287                         return;
 288                 }
 289
 290                 io->Read = 0;
 291                 io->Write = 0;
 292                 io->Sync = 0;
 293                 io->Async = 0;
 294                 io->Total = 0;
 295
 296                 for(i = 0; i < lines ; i++) {
 297                         char *s = procfile_lineword(ff, i, 1);
 298                         uint32_t hash = simple_hash(s);
 299
 300                         if(hash == Read_hash && !strcmp(s, "Read"))
 301                                 io->Read += strtoull(procfile_lineword(ff, i, 2), NULL, 10);
 302
 303                         else if(hash == Write_hash && !strcmp(s, "Write"))
 304                                 io->Write += strtoull(procfile_lineword(ff, i, 2), NULL, 10);
 305
 306                         else if(hash == Sync_hash && !strcmp(s, "Sync"))
 307                                 io->Sync += strtoull(procfile_lineword(ff, i, 2), NULL, 10);
 308
 309                         else if(hash == Async_hash && !strcmp(s, "Async"))
 310                                 io->Async += strtoull(procfile_lineword(ff, i, 2), NULL, 10);
 311
 312                         else if(hash == Total_hash && !strcmp(s, "Total"))
 313                                 io->Total += strtoull(procfile_lineword(ff, i, 2), NULL, 10);
 314                 }
 315
 316                 io->updated = 1;
 317                 // 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);
 318         }
 319 }
 320
 321 void cgroup_read_memory(struct memory *mem) {
 322         static procfile *ff = NULL;
 323
 324         static uint32_t cache_hash = 0;
 325         static uint32_t rss_hash = 0;
 326         static uint32_t rss_huge_hash = 0;
 327         static uint32_t mapped_file_hash = 0;
 328         static uint32_t writeback_hash = 0;
 329         static uint32_t dirty_hash = 0;
 330         static uint32_t swap_hash = 0;
 331         static uint32_t pgpgin_hash = 0;
 332         static uint32_t pgpgout_hash = 0;
 333         static uint32_t pgfault_hash = 0;
 334         static uint32_t pgmajfault_hash = 0;
 335 /*
 336         static uint32_t inactive_anon_hash = 0;
 337         static uint32_t active_anon_hash = 0;
 338         static uint32_t inactive_file_hash = 0;
 339         static uint32_t active_file_hash = 0;
 340         static uint32_t unevictable_hash = 0;
 341         static uint32_t hierarchical_memory_limit_hash = 0;
 342         static uint32_t total_cache_hash = 0;
 343         static uint32_t total_rss_hash = 0;
 344         static uint32_t total_rss_huge_hash = 0;
 345         static uint32_t total_mapped_file_hash = 0;
 346         static uint32_t total_writeback_hash = 0;
 347         static uint32_t total_dirty_hash = 0;
 348         static uint32_t total_swap_hash = 0;
 349         static uint32_t total_pgpgin_hash = 0;
 350         static uint32_t total_pgpgout_hash = 0;
 351         static uint32_t total_pgfault_hash = 0;
 352         static uint32_t total_pgmajfault_hash = 0;
 353         static uint32_t total_inactive_anon_hash = 0;
 354         static uint32_t total_active_anon_hash = 0;
 355         static uint32_t total_inactive_file_hash = 0;
 356         static uint32_t total_active_file_hash = 0;
 357         static uint32_t total_unevictable_hash = 0;
 358 */
 359         if(unlikely(cache_hash == 0)) {
 360                 cache_hash = simple_hash("cache");
 361                 rss_hash = simple_hash("rss");
 362                 rss_huge_hash = simple_hash("rss_huge");
 363                 mapped_file_hash = simple_hash("mapped_file");
 364                 writeback_hash = simple_hash("writeback");
 365                 dirty_hash = simple_hash("dirty");
 366                 swap_hash = simple_hash("swap");
 367                 pgpgin_hash = simple_hash("pgpgin");
 368                 pgpgout_hash = simple_hash("pgpgout");
 369                 pgfault_hash = simple_hash("pgfault");
 370                 pgmajfault_hash = simple_hash("pgmajfault");
 371 /*
 372                 inactive_anon_hash = simple_hash("inactive_anon");
 373                 active_anon_hash = simple_hash("active_anon");
 374                 inactive_file_hash = simple_hash("inactive_file");
 375                 active_file_hash = simple_hash("active_file");
 376                 unevictable_hash = simple_hash("unevictable");
 377                 hierarchical_memory_limit_hash = simple_hash("hierarchical_memory_limit");
 378                 total_cache_hash = simple_hash("total_cache");
 379                 total_rss_hash = simple_hash("total_rss");
 380                 total_rss_huge_hash = simple_hash("total_rss_huge");
 381                 total_mapped_file_hash = simple_hash("total_mapped_file");
 382                 total_writeback_hash = simple_hash("total_writeback");
 383                 total_dirty_hash = simple_hash("total_dirty");
 384                 total_swap_hash = simple_hash("total_swap");
 385                 total_pgpgin_hash = simple_hash("total_pgpgin");
 386                 total_pgpgout_hash = simple_hash("total_pgpgout");
 387                 total_pgfault_hash = simple_hash("total_pgfault");
 388                 total_pgmajfault_hash = simple_hash("total_pgmajfault");
 389                 total_inactive_anon_hash = simple_hash("total_inactive_anon");
 390                 total_active_anon_hash = simple_hash("total_active_anon");
 391                 total_inactive_file_hash = simple_hash("total_inactive_file");
 392                 total_active_file_hash = simple_hash("total_active_file");
 393                 total_unevictable_hash = simple_hash("total_unevictable");
 394 */
 395         }
 396
 397         mem->updated = 0;
 398         if(mem->filename) {
 399                 ff = procfile_reopen(ff, mem->filename, NULL, PROCFILE_FLAG_DEFAULT);
 400                 if(!ff) return;
 401
 402                 ff = procfile_readall(ff);
 403                 if(!ff) return;
 404
 405                 unsigned long i, lines = procfile_lines(ff);
 406
 407                 if(lines < 1) {
 408                         error("File '%s' should have 1+ lines.", mem->filename);
 409                         return;
 410                 }
 411
 412                 for(i = 0; i < lines ; i++) {
 413                         char *s = procfile_lineword(ff, i, 0);
 414                         uint32_t hash = simple_hash(s);
 415
 416                         if(hash == cache_hash && !strcmp(s, "cache"))
 417                                 mem->cache = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 418
 419                         else if(hash == rss_hash && !strcmp(s, "rss"))
 420                                 mem->rss = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 421
 422                         else if(hash == rss_huge_hash && !strcmp(s, "rss_huge"))
 423                                 mem->rss_huge = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 424
 425                         else if(hash == mapped_file_hash && !strcmp(s, "mapped_file"))
 426                                 mem->mapped_file = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 427
 428                         else if(hash == writeback_hash && !strcmp(s, "writeback"))
 429                                 mem->writeback = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 430
 431                         else if(hash == dirty_hash && !strcmp(s, "dirty")) {
 432                                 mem->dirty = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 433                                 mem->has_dirty_swap = 1;
 434                         }
 435
 436                         else if(hash == swap_hash && !strcmp(s, "swap")) {
 437                                 mem->swap = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 438                                 mem->has_dirty_swap = 1;
 439                         }
 440
 441                         else if(hash == pgpgin_hash && !strcmp(s, "pgpgin"))
 442                                 mem->pgpgin = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 443
 444                         else if(hash == pgpgout_hash && !strcmp(s, "pgpgout"))
 445                                 mem->pgpgout = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 446
 447                         else if(hash == pgfault_hash && !strcmp(s, "pgfault"))
 448                                 mem->pgfault = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 449
 450                         else if(hash == pgmajfault_hash && !strcmp(s, "pgmajfault"))
 451                                 mem->pgmajfault = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 452
 453 /*
 454                         else if(hash == inactive_anon_hash && !strcmp(s, "inactive_anon"))
 455                                 mem->inactive_anon = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 456
 457                         else if(hash == active_anon_hash && !strcmp(s, "active_anon"))
 458                                 mem->active_anon = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 459
 460                         else if(hash == inactive_file_hash && !strcmp(s, "inactive_file"))
 461                                 mem->inactive_file = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 462
 463                         else if(hash == active_file_hash && !strcmp(s, "active_file"))
 464                                 mem->active_file = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 465
 466                         else if(hash == unevictable_hash && !strcmp(s, "unevictable"))
 467                                 mem->unevictable = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 468
 469                         else if(hash == hierarchical_memory_limit_hash && !strcmp(s, "hierarchical_memory_limit"))
 470                                 mem->hierarchical_memory_limit = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 471
 472                 else if(hash == total_cache_hash && !strcmp(s, "total_cache"))
 473                                 mem->total_cache = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 474
 475                         else if(hash == total_rss_hash && !strcmp(s, "total_rss"))
 476                                 mem->total_rss = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 477
 478                         else if(hash == total_rss_huge_hash && !strcmp(s, "total_rss_huge"))
 479                                 mem->total_rss_huge = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 480
 481                         else if(hash == total_mapped_file_hash && !strcmp(s, "total_mapped_file"))
 482                                 mem->total_mapped_file = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 483
 484                         else if(hash == total_writeback_hash && !strcmp(s, "total_writeback"))
 485                                 mem->total_writeback = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 486
 487                         else if(hash == total_dirty_hash && !strcmp(s, "total_dirty"))
 488                                 mem->total_dirty = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 489
 490                         else if(hash == total_swap_hash && !strcmp(s, "total_swap"))
 491                                 mem->total_swap = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 492
 493                         else if(hash == total_pgpgin_hash && !strcmp(s, "total_pgpgin"))
 494                                 mem->total_pgpgin = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 495
 496                         else if(hash == total_pgpgout_hash && !strcmp(s, "total_pgpgout"))
 497                                 mem->total_pgpgout = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 498
 499                         else if(hash == total_pgfault_hash && !strcmp(s, "total_pgfault"))
 500                                 mem->total_pgfault = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 501
 502                         else if(hash == total_pgmajfault_hash && !strcmp(s, "total_pgmajfault"))
 503                                 mem->total_pgmajfault = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 504
 505                         else if(hash == total_inactive_anon_hash && !strcmp(s, "total_inactive_anon"))
 506                                 mem->total_inactive_anon = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 507
 508                         else if(hash == total_active_anon_hash && !strcmp(s, "total_active_anon"))
 509                                 mem->total_active_anon = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 510
 511                         else if(hash == total_inactive_file_hash && !strcmp(s, "total_inactive_file"))
 512                                 mem->total_inactive_file = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 513
 514                         else if(hash == total_active_file_hash && !strcmp(s, "total_active_file"))
 515                                 mem->total_active_file = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 516
 517                         else if(hash == total_unevictable_hash && !strcmp(s, "total_unevictable"))
 518                                 mem->total_unevictable = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 519 */
 520                 }
 521
 522                 // 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);
 523
 524                 mem->updated = 1;
 525         }
 526 }
 527
 528 void cgroup_read(struct cgroup *cg) {
 529         cgroup_read_cpuacct_stat(&cg->cpuacct_stat);
 530         cgroup_read_cpuacct_usage(&cg->cpuacct_usage);
 531         cgroup_read_memory(&cg->memory);
 532         cgroup_read_blkio(&cg->io_service_bytes);
 533         cgroup_read_blkio(&cg->io_serviced);
 534         cgroup_read_blkio(&cg->throttle_io_service_bytes);
 535         cgroup_read_blkio(&cg->throttle_io_serviced);
 536         cgroup_read_blkio(&cg->io_merged);
 537         cgroup_read_blkio(&cg->io_queued);
 538 }
 539
 540 void read_all_cgroups(struct cgroup *cg) {
 541         struct cgroup *i;
 542
 543         for(i = cg; i ; i = i->next)
 544                 cgroup_read(i);
 545 }
 546
 547 // ----------------------------------------------------------------------------
 548 // add/remove/find cgroup objects
 549
 550 #define CGROUP_NAME_LINE_MAX 1024
 551
 552 void cgroup_get_name(struct cgroup *cg) {
 553         pid_t cgroup_pid;
 554         char buffer[CGROUP_NAME_LINE_MAX + 1];
 555
 556         snprintf(buffer, CGROUP_NAME_LINE_MAX, "exec %s '%s'",
 557                  config_get("plugin:cgroups", "script to get cgroup names", PLUGINS_DIR "/cgroup-name.sh"), cg->name);
 558
 559         FILE *fp = mypopen(buffer, &cgroup_pid);
 560         if(!fp) {
 561                 error("CGROUP: Cannot popen(\"%s\", \"r\").", buffer);
 562                 return;
 563         }
 564         char *s = fgets(buffer, CGROUP_NAME_LINE_MAX, fp);
 565         mypclose(fp, cgroup_pid);
 566
 567         if(s && *s && *s != '\n') {
 568                 trim(s);
 569                 netdata_fix_chart_name(s);
 570                 free(cg->name);
 571                 cg->name = strdup(s);
 572                 if(!cg->name)
 573                         fatal("CGROUP: Cannot allocate memory for name cgroup %s name: '%s'", cg->id, s);
 574         }
 575 }
 576
 577 struct cgroup *cgroup_add(const char *id) {
 578         if(cgroup_root_count >= cgroup_root_max) {
 579                 info("Maximum number of cgroups reached (%d). Not adding cgroup '%s'", cgroup_root_count, id);
 580                 return NULL;
 581         }
 582
 583         int def = cgroup_enable_new_cgroups_detected_at_runtime;
 584         const char *name = id;
 585         if(!*name) {
 586                 name = "/";
 587
 588                 // disable by default the host cgroup
 589                 def = 0;
 590         }
 591         else {
 592                 if(*name == '/') name++;
 593
 594                 // disable by default the parent cgroup
 595                 // for known cgroup managers
 596                 if(!strcmp(name, "lxc") || !strcmp(name, "docker"))
 597                         def = 0;
 598         }
 599
 600         char option[FILENAME_MAX + 1];
 601         snprintf(option, FILENAME_MAX, "enable cgroup %s", name);
 602         if(!config_get_boolean("plugin:cgroups", option, def))
 603                 return NULL;
 604
 605         struct cgroup *cg = calloc(1, sizeof(struct cgroup));
 606         if(cg) {
 607                 cg->id = strdup(id);
 608                 if(!cg->id) fatal("Cannot allocate memory for cgroup '%s'", id);
 609
 610                 cg->hash = simple_hash(cg->id);
 611
 612                 cg->name = strdup(name);
 613                 if(!cg->name) fatal("Cannot allocate memory for cgroup '%s'", id);
 614
 615                 if(!cgroup_root)
 616                         cgroup_root = cg;
 617                 else {
 618                         // append it
 619                         struct cgroup *e;
 620                         for(e = cgroup_root; e->next ;e = e->next) ;
 621                         e->next = cg;
 622                 }
 623
 624                 cgroup_root_count++;
 625
 626                 // fprintf(stderr, " > added cgroup No %d, with id '%s' (%u) and name '%s'\n", cgroup_root_count, cg->id, cg->hash, cg->name);
 627
 628                 // fix the name by calling the external script
 629                 cgroup_get_name(cg);
 630         }
 631         else fatal("Cannot allocate memory for cgroup '%s'", id);
 632
 633         return cg;
 634 }
 635
 636 void cgroup_remove(struct cgroup *cg) {
 637         if(cg == cgroup_root) {
 638                 cgroup_root = cg->next;
 639         }
 640         else {
 641                 struct cgroup *e;
 642                 for(e = cgroup_root; e->next ;e = e->next)
 643                         if(unlikely(e->next == cg)) break;
 644
 645                 if(e->next != cg) {
 646                         error("Cannot find cgroup '%s' in list of cgroups", cg->id);
 647                 }
 648                 else {
 649                         e->next = cg->next;
 650                         cg->next = NULL;
 651                 }
 652         }
 653
 654         free(cg->cpuacct_usage.cpu_percpu);
 655
 656         free(cg->cpuacct_stat.filename);
 657         free(cg->cpuacct_usage.filename);
 658         free(cg->memory.filename);
 659         free(cg->io_service_bytes.filename);
 660         free(cg->io_serviced.filename);
 661         free(cg->throttle_io_service_bytes.filename);
 662         free(cg->throttle_io_serviced.filename);
 663         free(cg->io_merged.filename);
 664         free(cg->io_queued.filename);
 665
 666         free(cg->id);
 667         free(cg->name);
 668         free(cg);
 669 }
 670
 671 // find if a given cgroup exists
 672 struct cgroup *cgroup_find(const char *id) {
 673         uint32_t hash = simple_hash(id);
 674
 675         // fprintf(stderr, " > searching for '%s' (%u)\n", id, hash);
 676
 677         struct cgroup *cg;
 678         for(cg = cgroup_root; cg ; cg = cg->next) {
 679                 if(hash == cg->hash && strcmp(id, cg->id) == 0)
 680                         break;
 681         }
 682
 683         return cg;
 684 }
 685
 686 // ----------------------------------------------------------------------------
 687 // detect running cgroups
 688
 689 // callback for find_file_in_subdirs()
 690 void found_dir_in_subdir(const char *dir) {
 691         // fprintf(stderr, "found dir '%s'\n", dir);
 692
 693         struct cgroup *cg = cgroup_find(dir);
 694         if(!cg) {
 695                 if(*dir && cgroup_max_depth > 0) {
 696                         int depth = 0;
 697                         const char *s;
 698
 699                         for(s = dir; *s ;s++)
 700                                 if(unlikely(*s == '/'))
 701                                         depth++;
 702
 703                         if(depth > cgroup_max_depth) {
 704                                 info("cgroup '%s' is too deep (%d, while max is %d)", dir, depth, cgroup_max_depth);
 705                                 return;
 706                         }
 707                 }
 708                 cg = cgroup_add(dir);
 709         }
 710
 711         if(cg) cg->available = 1;
 712 }
 713
 714 void find_dir_in_subdirs(const char *base, const char *this, void (*callback)(const char *)) {
 715         if(!this) this = base;
 716         size_t dirlen = strlen(this), baselen = strlen(base);
 717
 718         DIR *dir = opendir(this);
 719         if(!dir) return;
 720
 721         callback(&this[baselen]);
 722
 723         struct dirent *de = NULL;
 724         while((de = readdir(dir))) {
 725                 if(de->d_type == DT_DIR
 726                         && (
 727                                 (de->d_name[0] == '.' && de->d_name[1] == '\0')
 728                                 || (de->d_name[0] == '.' && de->d_name[1] == '.' && de->d_name[2] == '\0')
 729                                 ))
 730                         continue;
 731
 732                 // fprintf(stderr, "examining '%s/%s'\n", this, de->d_name);
 733
 734                 if(de->d_type == DT_DIR) {
 735                         char *s = malloc(dirlen + strlen(de->d_name) + 2);
 736                         if(s) {
 737                                 strcpy(s, this);
 738                                 strcat(s, "/");
 739                                 strcat(s, de->d_name);
 740                                 find_dir_in_subdirs(base, s, callback);
 741                                 free(s);
 742                         }
 743                 }
 744         }
 745
 746         closedir(dir);
 747 }
 748
 749 void mark_all_cgroups_as_not_available() {
 750         struct cgroup *cg;
 751
 752         // mark all as not available
 753         for(cg = cgroup_root; cg ; cg = cg->next)
 754                 cg->available = 0;
 755 }
 756
 757 struct cgroup *find_all_cgroups() {
 758
 759         mark_all_cgroups_as_not_available();
 760
 761         if(cgroup_enable_cpuacct_stat || cgroup_enable_cpuacct_usage)
 762                 find_dir_in_subdirs(cgroup_cpuacct_base, NULL, found_dir_in_subdir);
 763
 764         if(cgroup_enable_blkio)
 765                 find_dir_in_subdirs(cgroup_blkio_base, NULL, found_dir_in_subdir);
 766
 767         if(cgroup_enable_memory)
 768                 find_dir_in_subdirs(cgroup_memory_base, NULL, found_dir_in_subdir);
 769
 770         struct cgroup *cg;
 771         for(cg = cgroup_root; cg ; cg = cg->next) {
 772                 // fprintf(stderr, " >>> CGROUP '%s' (%u - %s) with name '%s'\n", cg->id, cg->hash, cg->available?"available":"stopped", cg->name);
 773
 774                 if(!cg->available) {
 775                         cgroup_remove(cg);
 776                         continue;
 777                 }
 778
 779                 // check for newly added cgroups
 780                 // and update the filenames they read
 781                 char filename[FILENAME_MAX + 1];
 782                 if(cgroup_enable_cpuacct_stat && !cg->cpuacct_stat.filename) {
 783                         snprintf(filename, FILENAME_MAX, "%s%s/cpuacct.stat", cgroup_cpuacct_base, cg->id);
 784                         cg->cpuacct_stat.filename = strdup(filename);
 785                 }
 786                 if(cgroup_enable_cpuacct_usage && !cg->cpuacct_usage.filename) {
 787                         snprintf(filename, FILENAME_MAX, "%s%s/cpuacct.usage_percpu", cgroup_cpuacct_base, cg->id);
 788                         cg->cpuacct_usage.filename = strdup(filename);
 789                 }
 790                 if(cgroup_enable_memory && !cg->memory.filename) {
 791                         snprintf(filename, FILENAME_MAX, "%s%s/memory.stat", cgroup_memory_base, cg->id);
 792                         cg->memory.filename = strdup(filename);
 793                 }
 794                 if(cgroup_enable_blkio) {
 795                         if(!cg->io_service_bytes.filename) {
 796                                 snprintf(filename, FILENAME_MAX, "%s%s/blkio.io_service_bytes", cgroup_blkio_base, cg->id);
 797                                 cg->io_service_bytes.filename = strdup(filename);
 798                         }
 799                         if(!cg->io_serviced.filename) {
 800                                 snprintf(filename, FILENAME_MAX, "%s%s/blkio.io_serviced", cgroup_blkio_base, cg->id);
 801                                 cg->io_serviced.filename = strdup(filename);
 802                         }
 803                         if(!cg->throttle_io_service_bytes.filename) {
 804                                 snprintf(filename, FILENAME_MAX, "%s%s/blkio.throttle.io_service_bytes", cgroup_blkio_base, cg->id);
 805                                 cg->throttle_io_service_bytes.filename = strdup(filename);
 806                         }
 807                         if(!cg->throttle_io_serviced.filename) {
 808                                 snprintf(filename, FILENAME_MAX, "%s%s/blkio.throttle.io_serviced", cgroup_blkio_base, cg->id);
 809                                 cg->throttle_io_serviced.filename = strdup(filename);
 810                         }
 811                         if(!cg->io_merged.filename) {
 812                                 snprintf(filename, FILENAME_MAX, "%s%s/blkio.io_merged", cgroup_blkio_base, cg->id);
 813                                 cg->io_merged.filename = strdup(filename);
 814                         }
 815                         if(!cg->io_queued.filename) {
 816                                 snprintf(filename, FILENAME_MAX, "%s%s/blkio.io_queued", cgroup_blkio_base, cg->id);
 817                                 cg->io_queued.filename = strdup(filename);
 818                         }
 819                 }
 820         }
 821
 822         return cgroup_root;
 823 }
 824
 825 // ----------------------------------------------------------------------------
 826 // generate charts
 827
 828 #define CHART_TITLE_MAX 300
 829
 830 void update_cgroup_charts(int update_every) {
 831         char type[RRD_ID_LENGTH_MAX + 1];
 832         char title[CHART_TITLE_MAX + 1];
 833
 834         struct cgroup *cg;
 835         RRDSET *st;
 836
 837         for(cg = cgroup_root; cg ; cg = cg->next) {
 838                 if(!cg->available) continue;
 839
 840                 if(cg->id[0] == '\0')
 841                         strcpy(type, "cgroup_host");
 842                 else if(cg->id[0] == '/')
 843                         snprintf(type, RRD_ID_LENGTH_MAX, "cgroup_%s", cg->name);
 844                 else
 845                         snprintf(type, RRD_ID_LENGTH_MAX, "cgroup_%s", cg->name);
 846
 847                 netdata_fix_chart_id(type);
 848
 849                 if(cg->cpuacct_stat.updated) {
 850                         st = rrdset_find_bytype(type, "cpu");
 851                         if(!st) {
 852                                 snprintf(title, CHART_TITLE_MAX, "CPU Usage for cgroup %s", cg->name);
 853                                 st = rrdset_create(type, "cpu", NULL, "cpu", "cgroup.cpu", title, "%", 40000, update_every, RRDSET_TYPE_STACKED);
 854
 855                                 rrddim_add(st, "user", NULL, 100, hz, RRDDIM_INCREMENTAL);
 856                                 rrddim_add(st, "system", NULL, 100, hz, RRDDIM_INCREMENTAL);
 857                         }
 858                         else rrdset_next(st);
 859
 860                         rrddim_set(st, "user", cg->cpuacct_stat.user);
 861                         rrddim_set(st, "system", cg->cpuacct_stat.system);
 862                         rrdset_done(st);
 863                 }
 864
 865                 if(cg->cpuacct_usage.updated) {
 866                         char id[RRD_ID_LENGTH_MAX + 1];
 867                         unsigned int i;
 868
 869                         st = rrdset_find_bytype(type, "cpu_per_core");
 870                         if(!st) {
 871                                 snprintf(title, CHART_TITLE_MAX, "CPU Usage Per Core for cgroup %s", cg->name);
 872                                 st = rrdset_create(type, "cpu_per_core", NULL, "cpu", "cgroup.cpu_per_core", title, "%", 40100, update_every, RRDSET_TYPE_STACKED);
 873
 874                                 for(i = 0; i < cg->cpuacct_usage.cpus ;i++) {
 875                                         snprintf(id, CHART_TITLE_MAX, "cpu%d", i);
 876                                         rrddim_add(st, id, NULL, 100, 1000000, RRDDIM_INCREMENTAL);
 877                                 }
 878                         }
 879                         else rrdset_next(st);
 880
 881                         for(i = 0; i < cg->cpuacct_usage.cpus ;i++) {
 882                                 snprintf(id, CHART_TITLE_MAX, "cpu%d", i);
 883                                 rrddim_set(st, id, cg->cpuacct_usage.cpu_percpu[i]);
 884                         }
 885                         rrdset_done(st);
 886                 }
 887
 888                 if(cg->memory.updated) {
 889                         if(cg->memory.cache + cg->memory.rss + cg->memory.rss_huge + cg->memory.mapped_file > 0) {
 890                                 st = rrdset_find_bytype(type, "mem");
 891                                 if(!st) {
 892                                         snprintf(title, CHART_TITLE_MAX, "Memory Usage for cgroup %s", cg->name);
 893                                         st = rrdset_create(type, "mem", NULL, "mem", "cgroup.mem", title, "MB", 40200, update_every,
 894                                                            RRDSET_TYPE_STACKED);
 895
 896                                         rrddim_add(st, "cache", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
 897                                         rrddim_add(st, "rss", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
 898                                         if(cg->memory.has_dirty_swap)
 899                                                 rrddim_add(st, "swap", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
 900                                         rrddim_add(st, "rss_huge", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
 901                                         rrddim_add(st, "mapped_file", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
 902                                 }
 903                                 else rrdset_next(st);
 904
 905                                 rrddim_set(st, "cache", cg->memory.cache);
 906                                 rrddim_set(st, "rss", cg->memory.rss);
 907                                 if(cg->memory.has_dirty_swap)
 908                                         rrddim_set(st, "swap", cg->memory.swap);
 909                                 rrddim_set(st, "rss_huge", cg->memory.rss_huge);
 910                                 rrddim_set(st, "mapped_file", cg->memory.mapped_file);
 911                                 rrdset_done(st);
 912                         }
 913
 914                         st = rrdset_find_bytype(type, "writeback");
 915                         if(!st) {
 916                                 snprintf(title, CHART_TITLE_MAX, "Writeback Memory for cgroup %s", cg->name);
 917                                 st = rrdset_create(type, "writeback", NULL, "mem", "cgroup.writeback", title, "MB", 40300,
 918                                                    update_every, RRDSET_TYPE_AREA);
 919
 920                                 if(cg->memory.has_dirty_swap)
 921                                         rrddim_add(st, "dirty", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
 922                                 rrddim_add(st, "writeback", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
 923                         }
 924                         else rrdset_next(st);
 925
 926                         if(cg->memory.has_dirty_swap)
 927                                 rrddim_set(st, "dirty", cg->memory.dirty);
 928                         rrddim_set(st, "writeback", cg->memory.writeback);
 929                         rrdset_done(st);
 930
 931                         if(cg->memory.pgpgin + cg->memory.pgpgout > 0) {
 932                                 st = rrdset_find_bytype(type, "mem_activity");
 933                                 if(!st) {
 934                                         snprintf(title, CHART_TITLE_MAX, "Memory Activity for cgroup %s", cg->name);
 935                                         st = rrdset_create(type, "mem_activity", NULL, "mem", "cgroup.mem_activity", title, "MB/s",
 936                                                            40400, update_every, RRDSET_TYPE_LINE);
 937
 938                                         rrddim_add(st, "pgpgin", "in", sysconf(_SC_PAGESIZE), 1024 * 1024, RRDDIM_INCREMENTAL);
 939                                         rrddim_add(st, "pgpgout", "out", -sysconf(_SC_PAGESIZE), 1024 * 1024, RRDDIM_INCREMENTAL);
 940                                 }
 941                                 else rrdset_next(st);
 942
 943                                 rrddim_set(st, "pgpgin", cg->memory.pgpgin);
 944                                 rrddim_set(st, "pgpgout", cg->memory.pgpgout);
 945                                 rrdset_done(st);
 946                         }
 947
 948                         if(cg->memory.pgfault + cg->memory.pgmajfault > 0) {
 949                                 st = rrdset_find_bytype(type, "pgfaults");
 950                                 if(!st) {
 951                                         snprintf(title, CHART_TITLE_MAX, "Memory Page Faults for cgroup %s", cg->name);
 952                                         st = rrdset_create(type, "pgfaults", NULL, "mem", "cgroup.pgfaults", title, "MB/s", 40500,
 953                                                            update_every, RRDSET_TYPE_LINE);
 954
 955                                         rrddim_add(st, "pgfault", NULL, sysconf(_SC_PAGESIZE), 1024 * 1024, RRDDIM_INCREMENTAL);
 956                                         rrddim_add(st, "pgmajfault", "swap", -sysconf(_SC_PAGESIZE), 1024 * 1024, RRDDIM_INCREMENTAL);
 957                                 }
 958                                 else rrdset_next(st);
 959
 960                                 rrddim_set(st, "pgfault", cg->memory.pgfault);
 961                                 rrddim_set(st, "pgmajfault", cg->memory.pgmajfault);
 962                                 rrdset_done(st);
 963                         }
 964                 }
 965
 966                 if(cg->io_service_bytes.updated && cg->io_service_bytes.Read + cg->io_service_bytes.Write > 0) {
 967                         st = rrdset_find_bytype(type, "io");
 968                         if(!st) {
 969                                 snprintf(title, CHART_TITLE_MAX, "I/O Bandwidth (all disks) for cgroup %s", cg->name);
 970                                 st = rrdset_create(type, "io", NULL, "disk", "cgroup.io", title, "KB/s", 41200,
 971                                                    update_every, RRDSET_TYPE_LINE);
 972
 973                                 rrddim_add(st, "read", NULL, 1, 1024, RRDDIM_INCREMENTAL);
 974                                 rrddim_add(st, "write", NULL, -1, 1024, RRDDIM_INCREMENTAL);
 975                         }
 976                         else rrdset_next(st);
 977
 978                         rrddim_set(st, "read", cg->io_service_bytes.Read);
 979                         rrddim_set(st, "write", cg->io_service_bytes.Write);
 980                         rrdset_done(st);
 981                 }
 982
 983                 if(cg->io_serviced.updated && cg->io_serviced.Read + cg->io_serviced.Write > 0) {
 984                         st = rrdset_find_bytype(type, "serviced_ops");
 985                         if(!st) {
 986                                 snprintf(title, CHART_TITLE_MAX, "Serviced I/O Operations (all disks) for cgroup %s", cg->name);
 987                                 st = rrdset_create(type, "serviced_ops", NULL, "disk", "cgroup.serviced_ops", title, "operations/s", 41200,
 988                                                    update_every, RRDSET_TYPE_LINE);
 989
 990                                 rrddim_add(st, "read", NULL, 1, 1, RRDDIM_INCREMENTAL);
 991                                 rrddim_add(st, "write", NULL, -1, 1, RRDDIM_INCREMENTAL);
 992                         }
 993                         else rrdset_next(st);
 994
 995                         rrddim_set(st, "read", cg->io_serviced.Read);
 996                         rrddim_set(st, "write", cg->io_serviced.Write);
 997                         rrdset_done(st);
 998                 }
 999
1000                 if(cg->throttle_io_service_bytes.updated && cg->throttle_io_service_bytes.Read + cg->throttle_io_service_bytes.Write > 0) {
1001                         st = rrdset_find_bytype(type, "io");
1002                         if(!st) {
1003                                 snprintf(title, CHART_TITLE_MAX, "Throttle I/O Bandwidth (all disks) for cgroup %s", cg->name);
1004                                 st = rrdset_create(type, "io", NULL, "disk", "cgroup.io", title, "KB/s", 41200,
1005                                                    update_every, RRDSET_TYPE_LINE);
1006
1007                                 rrddim_add(st, "read", NULL, 1, 1024, RRDDIM_INCREMENTAL);
1008                                 rrddim_add(st, "write", NULL, -1, 1024, RRDDIM_INCREMENTAL);
1009                         }
1010                         else rrdset_next(st);
1011
1012                         rrddim_set(st, "read", cg->throttle_io_service_bytes.Read);
1013                         rrddim_set(st, "write", cg->throttle_io_service_bytes.Write);
1014                         rrdset_done(st);
1015                 }
1016
1017
1018                 if(cg->throttle_io_serviced.updated && cg->throttle_io_serviced.Read + cg->throttle_io_serviced.Write > 0) {
1019                         st = rrdset_find_bytype(type, "throttle_serviced_ops");
1020                         if(!st) {
1021                                 snprintf(title, CHART_TITLE_MAX, "Throttle Serviced I/O Operations (all disks) for cgroup %s", cg->name);
1022                                 st = rrdset_create(type, "throttle_serviced_ops", NULL, "disk", "cgroup.throttle_serviced_ops", title, "operations/s", 41200,
1023                                                    update_every, RRDSET_TYPE_LINE);
1024
1025                                 rrddim_add(st, "read", NULL, 1, 1, RRDDIM_INCREMENTAL);
1026                                 rrddim_add(st, "write", NULL, -1, 1, RRDDIM_INCREMENTAL);
1027                         }
1028                         else rrdset_next(st);
1029
1030                         rrddim_set(st, "read", cg->throttle_io_serviced.Read);
1031                         rrddim_set(st, "write", cg->throttle_io_serviced.Write);
1032                         rrdset_done(st);
1033                 }
1034
1035                 if(cg->io_queued.updated) {
1036                         st = rrdset_find_bytype(type, "queued_ops");
1037                         if(!st) {
1038                                 snprintf(title, CHART_TITLE_MAX, "Queued I/O Operations (all disks) for cgroup %s", cg->name);
1039                                 st = rrdset_create(type, "queued_ops", NULL, "disk", "cgroup.queued_ops", title, "operations", 42000,
1040                                                    update_every, RRDSET_TYPE_LINE);
1041
1042                                 rrddim_add(st, "read", NULL, 1, 1, RRDDIM_ABSOLUTE);
1043                                 rrddim_add(st, "write", NULL, -1, 1, RRDDIM_ABSOLUTE);
1044                         }
1045                         else rrdset_next(st);
1046
1047                         rrddim_set(st, "read", cg->io_queued.Read);
1048                         rrddim_set(st, "write", cg->io_queued.Write);
1049                         rrdset_done(st);
1050                 }
1051
1052                 if(cg->io_merged.updated && cg->io_merged.Read + cg->io_merged.Write > 0) {
1053                         st = rrdset_find_bytype(type, "merged_ops");
1054                         if(!st) {
1055                                 snprintf(title, CHART_TITLE_MAX, "Merged I/O Operations (all disks) for cgroup %s", cg->name);
1056                                 st = rrdset_create(type, "merged_ops", NULL, "disk", "cgroup.merged_ops", title, "operations/s", 42100,
1057                                                    update_every, RRDSET_TYPE_LINE);
1058
1059                                 rrddim_add(st, "read", NULL, 1, 1024, RRDDIM_INCREMENTAL);
1060                                 rrddim_add(st, "write", NULL, -1, 1024, RRDDIM_INCREMENTAL);
1061                         }
1062                         else rrdset_next(st);
1063
1064                         rrddim_set(st, "read", cg->io_merged.Read);
1065                         rrddim_set(st, "write", cg->io_merged.Write);
1066                         rrdset_done(st);
1067                 }
1068         }
1069 }
1070
1071 // ----------------------------------------------------------------------------
1072 // cgroups main
1073
1074 int do_sys_fs_cgroup(int update_every, unsigned long long dt) {
1075         static int cgroup_global_config_read = 0;
1076         static time_t last_run = 0;
1077         time_t now = time(NULL);
1078
1079         if(dt) {};
1080
1081         if(unlikely(!cgroup_global_config_read)) {
1082                 read_cgroup_plugin_configuration();
1083                 cgroup_global_config_read = 1;
1084         }
1085
1086         if(unlikely(cgroup_enable_new_cgroups_detected_at_runtime && now - last_run > cgroup_check_for_new_every)) {
1087                 find_all_cgroups();
1088                 last_run = now;
1089         }
1090
1091         read_all_cgroups(cgroup_root);
1092         update_cgroup_charts(update_every);
1093
1094         return 0;
1095 }
1096
1097 void *cgroups_main(void *ptr)
1098 {
1099         if(ptr) { ; }
1100
1101         info("CGROUP Plugin thread created with task id %d", gettid());
1102
1103         if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
1104                 error("Cannot set pthread cancel type to DEFERRED.");
1105
1106         if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
1107                 error("Cannot set pthread cancel state to ENABLE.");
1108
1109         struct rusage thread;
1110
1111         // when ZERO, attempt to do it
1112         int vdo_sys_fs_cgroup                   = 0;
1113         int vdo_cpu_netdata                     = !config_get_boolean("plugin:cgroups", "netdata server resources", 1);
1114
1115         // keep track of the time each module was called
1116         unsigned long long sutime_sys_fs_cgroup = 0ULL;
1117
1118         // the next time we will run - aligned properly
1119         unsigned long long sunext = (time(NULL) - (time(NULL) % rrd_update_every) + rrd_update_every) * 1000000ULL;
1120         unsigned long long sunow;
1121
1122         RRDSET *stcpu_thread = NULL;
1123
1124         for(;1;) {
1125                 if(unlikely(netdata_exit)) break;
1126
1127                 // delay until it is our time to run
1128                 while((sunow = timems()) < sunext)
1129                         usleep((useconds_t)(sunext - sunow));
1130
1131                 // find the next time we need to run
1132                 while(timems() > sunext)
1133                         sunext += rrd_update_every * 1000000ULL;
1134
1135                 if(unlikely(netdata_exit)) break;
1136
1137                 // BEGIN -- the job to be done
1138
1139                 if(!vdo_sys_fs_cgroup) {
1140                         debug(D_PROCNETDEV_LOOP, "PROCNETDEV: calling do_sys_fs_cgroup().");
1141                         sunow = timems();
1142                         vdo_sys_fs_cgroup = do_sys_fs_cgroup(rrd_update_every, (sutime_sys_fs_cgroup > 0)?sunow - sutime_sys_fs_cgroup:0ULL);
1143                         sutime_sys_fs_cgroup = sunow;
1144                 }
1145                 if(unlikely(netdata_exit)) break;
1146
1147                 // END -- the job is done
1148
1149                 // --------------------------------------------------------------------
1150
1151                 if(!vdo_cpu_netdata) {
1152                         getrusage(RUSAGE_THREAD, &thread);
1153
1154                         if(!stcpu_thread) stcpu_thread = rrdset_find("netdata.plugin_cgroups_cpu");
1155                         if(!stcpu_thread) {
1156                                 stcpu_thread = rrdset_create("netdata", "plugin_cgroups_cpu", NULL, "proc.internal", NULL, "NetData CGroups Plugin CPU usage", "milliseconds/s", 131000, rrd_update_every, RRDSET_TYPE_STACKED);
1157
1158                                 rrddim_add(stcpu_thread, "user",  NULL,  1, 1000, RRDDIM_INCREMENTAL);
1159                                 rrddim_add(stcpu_thread, "system", NULL, 1, 1000, RRDDIM_INCREMENTAL);
1160                         }
1161                         else rrdset_next(stcpu_thread);
1162
1163                         rrddim_set(stcpu_thread, "user"  , thread.ru_utime.tv_sec * 1000000ULL + thread.ru_utime.tv_usec);
1164                         rrddim_set(stcpu_thread, "system", thread.ru_stime.tv_sec * 1000000ULL + thread.ru_stime.tv_usec);
1165                         rrdset_done(stcpu_thread);
1166                 }
1167         }
1168
1169         pthread_exit(NULL);
1170         return NULL;
1171 }