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 /*
  72         unsigned long long Sync;
  73         unsigned long long Async;
  74         unsigned long long Total;
  75 */
  76 };
  77
  78 // https://www.kernel.org/doc/Documentation/cgroup-v1/memory.txt
  79 struct memory {
  80         int updated;
  81
  82         char *filename;
  83
  84         int has_dirty_swap;
  85
  86         unsigned long long cache;
  87         unsigned long long rss;
  88         unsigned long long rss_huge;
  89         unsigned long long mapped_file;
  90         unsigned long long writeback;
  91         unsigned long long dirty;
  92         unsigned long long swap;
  93         unsigned long long pgpgin;
  94         unsigned long long pgpgout;
  95         unsigned long long pgfault;
  96         unsigned long long pgmajfault;
  97 /*
  98         unsigned long long inactive_anon;
  99         unsigned long long active_anon;
 100         unsigned long long inactive_file;
 101         unsigned long long active_file;
 102         unsigned long long unevictable;
 103         unsigned long long hierarchical_memory_limit;
 104         unsigned long long total_cache;
 105         unsigned long long total_rss;
 106         unsigned long long total_rss_huge;
 107         unsigned long long total_mapped_file;
 108         unsigned long long total_writeback;
 109         unsigned long long total_dirty;
 110         unsigned long long total_swap;
 111         unsigned long long total_pgpgin;
 112         unsigned long long total_pgpgout;
 113         unsigned long long total_pgfault;
 114         unsigned long long total_pgmajfault;
 115         unsigned long long total_inactive_anon;
 116         unsigned long long total_active_anon;
 117         unsigned long long total_inactive_file;
 118         unsigned long long total_active_file;
 119         unsigned long long total_unevictable;
 120 */
 121 };
 122
 123 // https://www.kernel.org/doc/Documentation/cgroup-v1/cpuacct.txt
 124 struct cpuacct_stat {
 125         int updated;
 126
 127         char *filename;
 128
 129         unsigned long long user;
 130         unsigned long long system;
 131 };
 132
 133 // https://www.kernel.org/doc/Documentation/cgroup-v1/cpuacct.txt
 134 struct cpuacct_usage {
 135         int updated;
 136
 137         char *filename;
 138
 139         unsigned int cpus;
 140         unsigned long long *cpu_percpu;
 141 };
 142
 143 struct cgroup {
 144         int available;
 145         int enabled;
 146
 147         char *id;
 148         uint32_t hash;
 149
 150         char *chart_id;
 151
 152         struct cpuacct_stat cpuacct_stat;
 153         struct cpuacct_usage cpuacct_usage;
 154
 155         struct memory memory;
 156
 157         struct blkio io_service_bytes;                          // bytes
 158         struct blkio io_serviced;                                       // operations
 159
 160         struct blkio throttle_io_service_bytes;         // bytes
 161         struct blkio throttle_io_serviced;                      // operations
 162
 163         struct blkio io_merged;                                         // operations
 164         struct blkio io_queued;                                         // operations
 165
 166         struct cgroup *next;
 167
 168 } *cgroup_root = NULL;
 169
 170 // ----------------------------------------------------------------------------
 171 // read values from /sys
 172
 173 void cgroup_read_cpuacct_stat(struct cpuacct_stat *cp) {
 174         static procfile *ff = NULL;
 175
 176         static uint32_t user_hash = 0;
 177         static uint32_t system_hash = 0;
 178
 179         if(unlikely(user_hash == 0)) {
 180                 user_hash = simple_hash("user");
 181                 system_hash = simple_hash("system");
 182         }
 183
 184         cp->updated = 0;
 185         if(cp->filename) {
 186                 ff = procfile_reopen(ff, cp->filename, NULL, PROCFILE_FLAG_DEFAULT);
 187                 if(!ff) return;
 188
 189                 ff = procfile_readall(ff);
 190                 if(!ff) return;
 191
 192                 unsigned long i, lines = procfile_lines(ff);
 193
 194                 if(lines < 1) {
 195                         error("File '%s' should have 1+ lines.", cp->filename);
 196                         return;
 197                 }
 198
 199                 for(i = 0; i < lines ; i++) {
 200                         char *s = procfile_lineword(ff, i, 0);
 201                         uint32_t hash = simple_hash(s);
 202
 203                         if(hash == user_hash && !strcmp(s, "user"))
 204                                 cp->user = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 205
 206                         else if(hash == system_hash && !strcmp(s, "system"))
 207                                 cp->system = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 208                 }
 209
 210                 cp->updated = 1;
 211
 212                 // fprintf(stderr, "READ '%s': user: %llu, system: %llu\n", cp->filename, cp->user, cp->system);
 213         }
 214 }
 215
 216 void cgroup_read_cpuacct_usage(struct cpuacct_usage *ca) {
 217         static procfile *ff = NULL;
 218
 219         ca->updated = 0;
 220         if(ca->filename) {
 221                 ff = procfile_reopen(ff, ca->filename, NULL, PROCFILE_FLAG_DEFAULT);
 222                 if(!ff) return;
 223
 224                 ff = procfile_readall(ff);
 225                 if(!ff) return;
 226
 227                 if(procfile_lines(ff) < 1) {
 228                         error("File '%s' should have 1+ lines but has %d.", ca->filename, procfile_lines(ff));
 229                         return;
 230                 }
 231
 232                 unsigned long i = procfile_linewords(ff, 0);
 233                 if(i <= 0) return;
 234
 235                 // we may have 1 more CPU reported
 236                 while(i > 0) {
 237                         char *s = procfile_lineword(ff, 0, i - 1);
 238                         if(!*s) i--;
 239                         else break;
 240                 }
 241
 242                 if(i != ca->cpus) {
 243                         free(ca->cpu_percpu);
 244                 }
 245                 ca->cpu_percpu = malloc(sizeof(unsigned long long) * i);
 246                 if(!ca->cpu_percpu)
 247                         fatal("Cannot allocate memory (%z bytes)", sizeof(unsigned long long) * i);
 248
 249                 ca->cpus = i;
 250
 251                 for(i = 0; i < ca->cpus ;i++) {
 252                         ca->cpu_percpu[i] = strtoull(procfile_lineword(ff, 0, i), NULL, 10);
 253                         // fprintf(stderr, "READ '%s': cpu%d/%d: %llu ('%s')\n", ca->filename, i, ca->cpus, ca->cpu_percpu[i], procfile_lineword(ff, 0, i));
 254                 }
 255
 256                 ca->updated = 1;
 257         }
 258 }
 259
 260 void cgroup_read_blkio(struct blkio *io) {
 261         static procfile *ff = NULL;
 262
 263         static uint32_t Read_hash = 0;
 264         static uint32_t Write_hash = 0;
 265 /*
 266         static uint32_t Sync_hash = 0;
 267         static uint32_t Async_hash = 0;
 268         static uint32_t Total_hash = 0;
 269 */
 270
 271         if(unlikely(Read_hash == 0)) {
 272                 Read_hash = simple_hash("Read");
 273                 Write_hash = simple_hash("Write");
 274 /*
 275                 Sync_hash = simple_hash("Sync");
 276                 Async_hash = simple_hash("Async");
 277                 Total_hash = simple_hash("Total");
 278 */
 279         }
 280
 281         io->updated = 0;
 282         if(io->filename) {
 283                 ff = procfile_reopen(ff, io->filename, NULL, PROCFILE_FLAG_DEFAULT);
 284                 if(!ff) return;
 285
 286                 ff = procfile_readall(ff);
 287                 if(!ff) return;
 288
 289                 unsigned long i, lines = procfile_lines(ff);
 290
 291                 if(lines < 1) {
 292                         error("File '%s' should have 1+ lines.", io->filename);
 293                         return;
 294                 }
 295
 296                 io->Read = 0;
 297                 io->Write = 0;
 298 /*
 299                 io->Sync = 0;
 300                 io->Async = 0;
 301                 io->Total = 0;
 302 */
 303
 304                 for(i = 0; i < lines ; i++) {
 305                         char *s = procfile_lineword(ff, i, 1);
 306                         uint32_t hash = simple_hash(s);
 307
 308                         if(hash == Read_hash && !strcmp(s, "Read"))
 309                                 io->Read += strtoull(procfile_lineword(ff, i, 2), NULL, 10);
 310
 311                         else if(hash == Write_hash && !strcmp(s, "Write"))
 312                                 io->Write += strtoull(procfile_lineword(ff, i, 2), NULL, 10);
 313
 314 /*
 315                         else if(hash == Sync_hash && !strcmp(s, "Sync"))
 316                                 io->Sync += strtoull(procfile_lineword(ff, i, 2), NULL, 10);
 317
 318                         else if(hash == Async_hash && !strcmp(s, "Async"))
 319                                 io->Async += strtoull(procfile_lineword(ff, i, 2), NULL, 10);
 320
 321                         else if(hash == Total_hash && !strcmp(s, "Total"))
 322                                 io->Total += strtoull(procfile_lineword(ff, i, 2), NULL, 10);
 323 */
 324                 }
 325
 326                 io->updated = 1;
 327                 // 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);
 328         }
 329 }
 330
 331 void cgroup_read_memory(struct memory *mem) {
 332         static procfile *ff = NULL;
 333
 334         static uint32_t cache_hash = 0;
 335         static uint32_t rss_hash = 0;
 336         static uint32_t rss_huge_hash = 0;
 337         static uint32_t mapped_file_hash = 0;
 338         static uint32_t writeback_hash = 0;
 339         static uint32_t dirty_hash = 0;
 340         static uint32_t swap_hash = 0;
 341         static uint32_t pgpgin_hash = 0;
 342         static uint32_t pgpgout_hash = 0;
 343         static uint32_t pgfault_hash = 0;
 344         static uint32_t pgmajfault_hash = 0;
 345 /*
 346         static uint32_t inactive_anon_hash = 0;
 347         static uint32_t active_anon_hash = 0;
 348         static uint32_t inactive_file_hash = 0;
 349         static uint32_t active_file_hash = 0;
 350         static uint32_t unevictable_hash = 0;
 351         static uint32_t hierarchical_memory_limit_hash = 0;
 352         static uint32_t total_cache_hash = 0;
 353         static uint32_t total_rss_hash = 0;
 354         static uint32_t total_rss_huge_hash = 0;
 355         static uint32_t total_mapped_file_hash = 0;
 356         static uint32_t total_writeback_hash = 0;
 357         static uint32_t total_dirty_hash = 0;
 358         static uint32_t total_swap_hash = 0;
 359         static uint32_t total_pgpgin_hash = 0;
 360         static uint32_t total_pgpgout_hash = 0;
 361         static uint32_t total_pgfault_hash = 0;
 362         static uint32_t total_pgmajfault_hash = 0;
 363         static uint32_t total_inactive_anon_hash = 0;
 364         static uint32_t total_active_anon_hash = 0;
 365         static uint32_t total_inactive_file_hash = 0;
 366         static uint32_t total_active_file_hash = 0;
 367         static uint32_t total_unevictable_hash = 0;
 368 */
 369         if(unlikely(cache_hash == 0)) {
 370                 cache_hash = simple_hash("cache");
 371                 rss_hash = simple_hash("rss");
 372                 rss_huge_hash = simple_hash("rss_huge");
 373                 mapped_file_hash = simple_hash("mapped_file");
 374                 writeback_hash = simple_hash("writeback");
 375                 dirty_hash = simple_hash("dirty");
 376                 swap_hash = simple_hash("swap");
 377                 pgpgin_hash = simple_hash("pgpgin");
 378                 pgpgout_hash = simple_hash("pgpgout");
 379                 pgfault_hash = simple_hash("pgfault");
 380                 pgmajfault_hash = simple_hash("pgmajfault");
 381 /*
 382                 inactive_anon_hash = simple_hash("inactive_anon");
 383                 active_anon_hash = simple_hash("active_anon");
 384                 inactive_file_hash = simple_hash("inactive_file");
 385                 active_file_hash = simple_hash("active_file");
 386                 unevictable_hash = simple_hash("unevictable");
 387                 hierarchical_memory_limit_hash = simple_hash("hierarchical_memory_limit");
 388                 total_cache_hash = simple_hash("total_cache");
 389                 total_rss_hash = simple_hash("total_rss");
 390                 total_rss_huge_hash = simple_hash("total_rss_huge");
 391                 total_mapped_file_hash = simple_hash("total_mapped_file");
 392                 total_writeback_hash = simple_hash("total_writeback");
 393                 total_dirty_hash = simple_hash("total_dirty");
 394                 total_swap_hash = simple_hash("total_swap");
 395                 total_pgpgin_hash = simple_hash("total_pgpgin");
 396                 total_pgpgout_hash = simple_hash("total_pgpgout");
 397                 total_pgfault_hash = simple_hash("total_pgfault");
 398                 total_pgmajfault_hash = simple_hash("total_pgmajfault");
 399                 total_inactive_anon_hash = simple_hash("total_inactive_anon");
 400                 total_active_anon_hash = simple_hash("total_active_anon");
 401                 total_inactive_file_hash = simple_hash("total_inactive_file");
 402                 total_active_file_hash = simple_hash("total_active_file");
 403                 total_unevictable_hash = simple_hash("total_unevictable");
 404 */
 405         }
 406
 407         mem->updated = 0;
 408         if(mem->filename) {
 409                 ff = procfile_reopen(ff, mem->filename, NULL, PROCFILE_FLAG_DEFAULT);
 410                 if(!ff) return;
 411
 412                 ff = procfile_readall(ff);
 413                 if(!ff) return;
 414
 415                 unsigned long i, lines = procfile_lines(ff);
 416
 417                 if(lines < 1) {
 418                         error("File '%s' should have 1+ lines.", mem->filename);
 419                         return;
 420                 }
 421
 422                 for(i = 0; i < lines ; i++) {
 423                         char *s = procfile_lineword(ff, i, 0);
 424                         uint32_t hash = simple_hash(s);
 425
 426                         if(hash == cache_hash && !strcmp(s, "cache"))
 427                                 mem->cache = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 428
 429                         else if(hash == rss_hash && !strcmp(s, "rss"))
 430                                 mem->rss = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 431
 432                         else if(hash == rss_huge_hash && !strcmp(s, "rss_huge"))
 433                                 mem->rss_huge = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 434
 435                         else if(hash == mapped_file_hash && !strcmp(s, "mapped_file"))
 436                                 mem->mapped_file = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 437
 438                         else if(hash == writeback_hash && !strcmp(s, "writeback"))
 439                                 mem->writeback = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 440
 441                         else if(hash == dirty_hash && !strcmp(s, "dirty")) {
 442                                 mem->dirty = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 443                                 mem->has_dirty_swap = 1;
 444                         }
 445
 446                         else if(hash == swap_hash && !strcmp(s, "swap")) {
 447                                 mem->swap = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 448                                 mem->has_dirty_swap = 1;
 449                         }
 450
 451                         else if(hash == pgpgin_hash && !strcmp(s, "pgpgin"))
 452                                 mem->pgpgin = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 453
 454                         else if(hash == pgpgout_hash && !strcmp(s, "pgpgout"))
 455                                 mem->pgpgout = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 456
 457                         else if(hash == pgfault_hash && !strcmp(s, "pgfault"))
 458                                 mem->pgfault = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 459
 460                         else if(hash == pgmajfault_hash && !strcmp(s, "pgmajfault"))
 461                                 mem->pgmajfault = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 462
 463 /*
 464                         else if(hash == inactive_anon_hash && !strcmp(s, "inactive_anon"))
 465                                 mem->inactive_anon = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 466
 467                         else if(hash == active_anon_hash && !strcmp(s, "active_anon"))
 468                                 mem->active_anon = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 469
 470                         else if(hash == inactive_file_hash && !strcmp(s, "inactive_file"))
 471                                 mem->inactive_file = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 472
 473                         else if(hash == active_file_hash && !strcmp(s, "active_file"))
 474                                 mem->active_file = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 475
 476                         else if(hash == unevictable_hash && !strcmp(s, "unevictable"))
 477                                 mem->unevictable = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 478
 479                         else if(hash == hierarchical_memory_limit_hash && !strcmp(s, "hierarchical_memory_limit"))
 480                                 mem->hierarchical_memory_limit = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 481
 482                 else if(hash == total_cache_hash && !strcmp(s, "total_cache"))
 483                                 mem->total_cache = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 484
 485                         else if(hash == total_rss_hash && !strcmp(s, "total_rss"))
 486                                 mem->total_rss = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 487
 488                         else if(hash == total_rss_huge_hash && !strcmp(s, "total_rss_huge"))
 489                                 mem->total_rss_huge = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 490
 491                         else if(hash == total_mapped_file_hash && !strcmp(s, "total_mapped_file"))
 492                                 mem->total_mapped_file = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 493
 494                         else if(hash == total_writeback_hash && !strcmp(s, "total_writeback"))
 495                                 mem->total_writeback = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 496
 497                         else if(hash == total_dirty_hash && !strcmp(s, "total_dirty"))
 498                                 mem->total_dirty = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 499
 500                         else if(hash == total_swap_hash && !strcmp(s, "total_swap"))
 501                                 mem->total_swap = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 502
 503                         else if(hash == total_pgpgin_hash && !strcmp(s, "total_pgpgin"))
 504                                 mem->total_pgpgin = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 505
 506                         else if(hash == total_pgpgout_hash && !strcmp(s, "total_pgpgout"))
 507                                 mem->total_pgpgout = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 508
 509                         else if(hash == total_pgfault_hash && !strcmp(s, "total_pgfault"))
 510                                 mem->total_pgfault = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 511
 512                         else if(hash == total_pgmajfault_hash && !strcmp(s, "total_pgmajfault"))
 513                                 mem->total_pgmajfault = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 514
 515                         else if(hash == total_inactive_anon_hash && !strcmp(s, "total_inactive_anon"))
 516                                 mem->total_inactive_anon = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 517
 518                         else if(hash == total_active_anon_hash && !strcmp(s, "total_active_anon"))
 519                                 mem->total_active_anon = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 520
 521                         else if(hash == total_inactive_file_hash && !strcmp(s, "total_inactive_file"))
 522                                 mem->total_inactive_file = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 523
 524                         else if(hash == total_active_file_hash && !strcmp(s, "total_active_file"))
 525                                 mem->total_active_file = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 526
 527                         else if(hash == total_unevictable_hash && !strcmp(s, "total_unevictable"))
 528                                 mem->total_unevictable = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 529 */
 530                 }
 531
 532                 // 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);
 533
 534                 mem->updated = 1;
 535         }
 536 }
 537
 538 void cgroup_read(struct cgroup *cg) {
 539         debug(D_CGROUP, "reading metrics for cgroups '%s'", cg->id);
 540
 541         cgroup_read_cpuacct_stat(&cg->cpuacct_stat);
 542         cgroup_read_cpuacct_usage(&cg->cpuacct_usage);
 543         cgroup_read_memory(&cg->memory);
 544         cgroup_read_blkio(&cg->io_service_bytes);
 545         cgroup_read_blkio(&cg->io_serviced);
 546         cgroup_read_blkio(&cg->throttle_io_service_bytes);
 547         cgroup_read_blkio(&cg->throttle_io_serviced);
 548         cgroup_read_blkio(&cg->io_merged);
 549         cgroup_read_blkio(&cg->io_queued);
 550 }
 551
 552 void read_all_cgroups(struct cgroup *root) {
 553         debug(D_CGROUP, "reading metrics for all cgroups");
 554
 555         struct cgroup *cg;
 556
 557         for(cg = root; cg ; cg = cg->next)
 558                 if(cg->enabled)
 559                         cgroup_read(cg);
 560 }
 561
 562 // ----------------------------------------------------------------------------
 563 // add/remove/find cgroup objects
 564
 565 #define CGROUP_CHARTID_LINE_MAX 1024
 566
 567 void cgroup_get_chart_id(struct cgroup *cg) {
 568         debug(D_CGROUP, "getting the name of cgroup '%s'", cg->id);
 569
 570         pid_t cgroup_pid;
 571         char buffer[CGROUP_CHARTID_LINE_MAX + 1];
 572
 573         snprintf(buffer, CGROUP_CHARTID_LINE_MAX, "exec %s '%s'",
 574                  config_get("plugin:cgroups", "script to get cgroup names", PLUGINS_DIR "/cgroup-name.sh"), cg->chart_id);
 575
 576         debug(D_CGROUP, "executing command '%s' for cgroup '%s'", buffer, cg->id);
 577         FILE *fp = mypopen(buffer, &cgroup_pid);
 578         if(!fp) {
 579                 error("CGROUP: Cannot popen(\"%s\", \"r\").", buffer);
 580                 return;
 581         }
 582         debug(D_CGROUP, "reading from command '%s' for cgroup '%s'", buffer, cg->id);
 583         char *s = fgets(buffer, CGROUP_CHARTID_LINE_MAX, fp);
 584         debug(D_CGROUP, "closing command for cgroup '%s'", cg->id);
 585         mypclose(fp, cgroup_pid);
 586         debug(D_CGROUP, "closed command for cgroup '%s'", cg->id);
 587
 588         if(s && *s && *s != '\n') {
 589                 debug(D_CGROUP, "cgroup '%s' should be renamed to '%s'", cg->id, s);
 590
 591                 trim(s);
 592                 netdata_fix_chart_id(s);
 593                 free(cg->chart_id);
 594                 cg->chart_id = strdup(s);
 595                 if(!cg->chart_id)
 596                         fatal("CGROUP: Cannot allocate memory for chart id of cgroup '%s' chart id: '%s'", cg->id, s);
 597
 598                 debug(D_CGROUP, "cgroup '%s' renamed to '%s'", cg->id, cg->chart_id);
 599         }
 600         else debug(D_CGROUP, "cgroup '%s' is not to be renamed (will be shown as '%s')", cg->id, cg->chart_id);
 601 }
 602
 603 struct cgroup *cgroup_add(const char *id) {
 604         debug(D_CGROUP, "adding cgroup '%s'", id);
 605
 606         if(cgroup_root_count >= cgroup_root_max) {
 607                 info("Maximum number of cgroups reached (%d). Not adding cgroup '%s'", cgroup_root_count, id);
 608                 return NULL;
 609         }
 610
 611         int def = cgroup_enable_new_cgroups_detected_at_runtime;
 612         const char *chart_id = id;
 613         if(!*chart_id) {
 614                 chart_id = "/";
 615
 616                 // disable by default the host cgroup
 617                 def = 0;
 618                 debug(D_CGROUP, "cgroup '%s' is the host container (by default %s)", id, (def)?"enabled":"disabled");
 619         }
 620         else {
 621                 if(*chart_id == '/') chart_id++;
 622
 623                 // disable by default the parent cgroup
 624                 // for known cgroup managers
 625                 if(!strcmp(chart_id, "lxc") || !strcmp(chart_id, "docker")) {
 626                         def = 0;
 627                         debug(D_CGROUP, "cgroup '%s' is container manager (by default %s)", id, (def)?"enabled":"disabled");
 628                 }
 629         }
 630
 631         struct cgroup *cg = calloc(1, sizeof(struct cgroup));
 632         if(!cg) fatal("Cannot allocate memory for cgroup '%s'", id);
 633
 634         debug(D_CGROUP, "adding cgroup '%s'", id);
 635
 636         cg->id = strdup(id);
 637         if(!cg->id) fatal("Cannot allocate memory for cgroup '%s'", id);
 638
 639         cg->hash = simple_hash(cg->id);
 640
 641         cg->chart_id = strdup(chart_id);
 642         if(!cg->chart_id) fatal("Cannot allocate memory for cgroup '%s'", id);
 643
 644         if(!cgroup_root)
 645                 cgroup_root = cg;
 646         else {
 647                 // append it
 648                 struct cgroup *e;
 649                 for(e = cgroup_root; e->next ;e = e->next) ;
 650                 e->next = cg;
 651         }
 652
 653         cgroup_root_count++;
 654
 655         // fprintf(stderr, " > added cgroup No %d, with id '%s' (%u) and name '%s'\n", cgroup_root_count, cg->id, cg->hash, cg->name);
 656
 657         // fix the name by calling the external script
 658         cgroup_get_chart_id(cg);
 659
 660         char option[FILENAME_MAX + 1];
 661         snprintf(option, FILENAME_MAX, "enable cgroup %s", cg->chart_id);
 662         cg->enabled = config_get_boolean("plugin:cgroups", option, def);
 663         debug(D_CGROUP, "finally: new cgroup '%s' is named '%s' and is %s (default was %s)", cg->id, cg->chart_id, (cg->enabled)?"enabled":"disabled", (def)?"enabled":"disabled");
 664
 665         return cg;
 666 }
 667
 668 void cgroup_remove(struct cgroup *cg) {
 669         debug(D_CGROUP, "removing cgroup '%s'", cg->id);
 670
 671         if(cg == cgroup_root) {
 672                 cgroup_root = cg->next;
 673         }
 674         else {
 675                 struct cgroup *e;
 676                 for(e = cgroup_root; e->next ;e = e->next)
 677                         if(unlikely(e->next == cg)) break;
 678
 679                 if(e->next != cg) {
 680                         error("Cannot find cgroup '%s' in list of cgroups", cg->id);
 681                 }
 682                 else {
 683                         e->next = cg->next;
 684                         cg->next = NULL;
 685                 }
 686         }
 687
 688         free(cg->cpuacct_usage.cpu_percpu);
 689
 690         free(cg->cpuacct_stat.filename);
 691         free(cg->cpuacct_usage.filename);
 692         free(cg->memory.filename);
 693         free(cg->io_service_bytes.filename);
 694         free(cg->io_serviced.filename);
 695         free(cg->throttle_io_service_bytes.filename);
 696         free(cg->throttle_io_serviced.filename);
 697         free(cg->io_merged.filename);
 698         free(cg->io_queued.filename);
 699
 700         free(cg->id);
 701         free(cg->chart_id);
 702         free(cg);
 703 }
 704
 705 // find if a given cgroup exists
 706 struct cgroup *cgroup_find(const char *id) {
 707         debug(D_CGROUP, "searching for cgroup '%s'", id);
 708
 709         uint32_t hash = simple_hash(id);
 710
 711         // fprintf(stderr, " > searching for '%s' (%u)\n", id, hash);
 712
 713         struct cgroup *cg;
 714         for(cg = cgroup_root; cg ; cg = cg->next) {
 715                 if(hash == cg->hash && strcmp(id, cg->id) == 0)
 716                         break;
 717         }
 718
 719         debug(D_CGROUP, "cgroup '%s' %s", id, (cg)?"found":"not found");
 720         return cg;
 721 }
 722
 723 // ----------------------------------------------------------------------------
 724 // detect running cgroups
 725
 726 // callback for find_file_in_subdirs()
 727 void found_dir_in_subdir(const char *dir) {
 728         debug(D_CGROUP, "examining cgroup dir '%s'", dir);
 729
 730         struct cgroup *cg = cgroup_find(dir);
 731         if(!cg) {
 732                 if(*dir && cgroup_max_depth > 0) {
 733                         int depth = 0;
 734                         const char *s;
 735
 736                         for(s = dir; *s ;s++)
 737                                 if(unlikely(*s == '/'))
 738                                         depth++;
 739
 740                         if(depth > cgroup_max_depth) {
 741                                 info("cgroup '%s' is too deep (%d, while max is %d)", dir, depth, cgroup_max_depth);
 742                                 return;
 743                         }
 744                 }
 745                 debug(D_CGROUP, "will add dir '%s' as cgroup", dir);
 746                 cg = cgroup_add(dir);
 747         }
 748
 749         if(cg) cg->available = 1;
 750 }
 751
 752 void find_dir_in_subdirs(const char *base, const char *this, void (*callback)(const char *)) {
 753         if(!this) this = base;
 754         size_t dirlen = strlen(this), baselen = strlen(base);
 755
 756         DIR *dir = opendir(this);
 757         if(!dir) return;
 758
 759         callback(&this[baselen]);
 760
 761         struct dirent *de = NULL;
 762         while((de = readdir(dir))) {
 763                 if(de->d_type == DT_DIR
 764                         && (
 765                                 (de->d_name[0] == '.' && de->d_name[1] == '\0')
 766                                 || (de->d_name[0] == '.' && de->d_name[1] == '.' && de->d_name[2] == '\0')
 767                                 ))
 768                         continue;
 769
 770                 debug(D_CGROUP, "examining '%s/%s'", this, de->d_name);
 771
 772                 if(de->d_type == DT_DIR) {
 773                         char *s = malloc(dirlen + strlen(de->d_name) + 2);
 774                         if(s) {
 775                                 strcpy(s, this);
 776                                 strcat(s, "/");
 777                                 strcat(s, de->d_name);
 778                                 find_dir_in_subdirs(base, s, callback);
 779                                 free(s);
 780                         }
 781                 }
 782         }
 783
 784         closedir(dir);
 785 }
 786
 787 void mark_all_cgroups_as_not_available() {
 788         debug(D_CGROUP, "marking all cgroups as not available");
 789
 790         struct cgroup *cg;
 791
 792         // mark all as not available
 793         for(cg = cgroup_root; cg ; cg = cg->next)
 794                 cg->available = 0;
 795 }
 796
 797 struct cgroup *find_all_cgroups() {
 798         debug(D_CGROUP, "searching for cgroups");
 799
 800         mark_all_cgroups_as_not_available();
 801
 802         if(cgroup_enable_cpuacct_stat || cgroup_enable_cpuacct_usage)
 803                 find_dir_in_subdirs(cgroup_cpuacct_base, NULL, found_dir_in_subdir);
 804
 805         if(cgroup_enable_blkio)
 806                 find_dir_in_subdirs(cgroup_blkio_base, NULL, found_dir_in_subdir);
 807
 808         if(cgroup_enable_memory)
 809                 find_dir_in_subdirs(cgroup_memory_base, NULL, found_dir_in_subdir);
 810
 811         struct cgroup *cg;
 812         for(cg = cgroup_root; cg ; cg = cg->next) {
 813                 // fprintf(stderr, " >>> CGROUP '%s' (%u - %s) with name '%s'\n", cg->id, cg->hash, cg->available?"available":"stopped", cg->name);
 814
 815                 if(!cg->available) {
 816                         // do not remove the cgroup
 817                         // it will be added back on the next scan
 818                         // cgroup_remove(cg);
 819                         continue;
 820                 }
 821
 822                 debug(D_CGROUP, "checking paths for cgroup '%s'", cg->id);
 823
 824                 // check for newly added cgroups
 825                 // and update the filenames they read
 826                 char filename[FILENAME_MAX + 1];
 827                 if(cgroup_enable_cpuacct_stat && !cg->cpuacct_stat.filename) {
 828                         snprintf(filename, FILENAME_MAX, "%s%s/cpuacct.stat", cgroup_cpuacct_base, cg->id);
 829                         cg->cpuacct_stat.filename = strdup(filename);
 830                         debug(D_CGROUP, "cpuacct.stat filename for cgroup '%s': '%s'", cg->id, cg->cpuacct_stat.filename);
 831                 }
 832                 if(cgroup_enable_cpuacct_usage && !cg->cpuacct_usage.filename) {
 833                         snprintf(filename, FILENAME_MAX, "%s%s/cpuacct.usage_percpu", cgroup_cpuacct_base, cg->id);
 834                         cg->cpuacct_usage.filename = strdup(filename);
 835                         debug(D_CGROUP, "cpuacct.usage_percpu filename for cgroup '%s': '%s'", cg->id, cg->cpuacct_usage.filename);
 836                 }
 837                 if(cgroup_enable_memory && !cg->memory.filename) {
 838                         snprintf(filename, FILENAME_MAX, "%s%s/memory.stat", cgroup_memory_base, cg->id);
 839                         cg->memory.filename = strdup(filename);
 840                         debug(D_CGROUP, "memory.stat filename for cgroup '%s': '%s'", cg->id, cg->memory.filename);
 841                 }
 842                 if(cgroup_enable_blkio) {
 843                         if(!cg->io_service_bytes.filename) {
 844                                 snprintf(filename, FILENAME_MAX, "%s%s/blkio.io_service_bytes", cgroup_blkio_base, cg->id);
 845                                 cg->io_service_bytes.filename = strdup(filename);
 846                                 debug(D_CGROUP, "io_service_bytes filename for cgroup '%s': '%s'", cg->id, cg->io_service_bytes.filename);
 847                         }
 848                         if(!cg->io_serviced.filename) {
 849                                 snprintf(filename, FILENAME_MAX, "%s%s/blkio.io_serviced", cgroup_blkio_base, cg->id);
 850                                 cg->io_serviced.filename = strdup(filename);
 851                                 debug(D_CGROUP, "io_serviced filename for cgroup '%s': '%s'", cg->id, cg->io_serviced.filename);
 852                         }
 853                         if(!cg->throttle_io_service_bytes.filename) {
 854                                 snprintf(filename, FILENAME_MAX, "%s%s/blkio.throttle.io_service_bytes", cgroup_blkio_base, cg->id);
 855                                 cg->throttle_io_service_bytes.filename = strdup(filename);
 856                                 debug(D_CGROUP, "throttle_io_service_bytes filename for cgroup '%s': '%s'", cg->id, cg->throttle_io_service_bytes.filename);
 857                         }
 858                         if(!cg->throttle_io_serviced.filename) {
 859                                 snprintf(filename, FILENAME_MAX, "%s%s/blkio.throttle.io_serviced", cgroup_blkio_base, cg->id);
 860                                 cg->throttle_io_serviced.filename = strdup(filename);
 861                                 debug(D_CGROUP, "throttle_io_serviced filename for cgroup '%s': '%s'", cg->id, cg->throttle_io_serviced.filename);
 862                         }
 863                         if(!cg->io_merged.filename) {
 864                                 snprintf(filename, FILENAME_MAX, "%s%s/blkio.io_merged", cgroup_blkio_base, cg->id);
 865                                 cg->io_merged.filename = strdup(filename);
 866                                 debug(D_CGROUP, "io_merged filename for cgroup '%s': '%s'", cg->id, cg->io_merged.filename);
 867                         }
 868                         if(!cg->io_queued.filename) {
 869                                 snprintf(filename, FILENAME_MAX, "%s%s/blkio.io_queued", cgroup_blkio_base, cg->id);
 870                                 cg->io_queued.filename = strdup(filename);
 871                                 debug(D_CGROUP, "io_queued filename for cgroup '%s': '%s'", cg->id, cg->io_queued.filename);
 872                         }
 873                 }
 874         }
 875
 876         debug(D_CGROUP, "done searching for cgroups");
 877         return cgroup_root;
 878 }
 879
 880 // ----------------------------------------------------------------------------
 881 // generate charts
 882
 883 #define CHART_TITLE_MAX 300
 884
 885 void update_cgroup_charts(int update_every) {
 886         debug(D_CGROUP, "updating cgroups charts");
 887
 888         char type[RRD_ID_LENGTH_MAX + 1];
 889         char title[CHART_TITLE_MAX + 1];
 890
 891         struct cgroup *cg;
 892         RRDSET *st;
 893
 894         for(cg = cgroup_root; cg ; cg = cg->next) {
 895                 if(!cg->available || !cg->enabled) continue;
 896
 897                 if(cg->id[0] == '\0')
 898                         strcpy(type, "cgroup_host");
 899                 else if(cg->id[0] == '/')
 900                         snprintf(type, RRD_ID_LENGTH_MAX, "cgroup_%s", cg->chart_id);
 901                 else
 902                         snprintf(type, RRD_ID_LENGTH_MAX, "cgroup_%s", cg->chart_id);
 903
 904                 netdata_fix_chart_id(type);
 905
 906                 if(cg->cpuacct_stat.updated) {
 907                         st = rrdset_find_bytype(type, "cpu");
 908                         if(!st) {
 909                                 snprintf(title, CHART_TITLE_MAX, "CPU Usage for cgroup %s", cg->chart_id);
 910                                 st = rrdset_create(type, "cpu", NULL, "cpu", "cgroup.cpu", title, "%", 40000, update_every, RRDSET_TYPE_STACKED);
 911
 912                                 rrddim_add(st, "user", NULL, 100, hz, RRDDIM_INCREMENTAL);
 913                                 rrddim_add(st, "system", NULL, 100, hz, RRDDIM_INCREMENTAL);
 914                         }
 915                         else rrdset_next(st);
 916
 917                         rrddim_set(st, "user", cg->cpuacct_stat.user);
 918                         rrddim_set(st, "system", cg->cpuacct_stat.system);
 919                         rrdset_done(st);
 920                 }
 921
 922                 if(cg->cpuacct_usage.updated) {
 923                         char id[RRD_ID_LENGTH_MAX + 1];
 924                         unsigned int i;
 925
 926                         st = rrdset_find_bytype(type, "cpu_per_core");
 927                         if(!st) {
 928                                 snprintf(title, CHART_TITLE_MAX, "CPU Usage Per Core for cgroup %s", cg->chart_id);
 929                                 st = rrdset_create(type, "cpu_per_core", NULL, "cpu", "cgroup.cpu_per_core", title, "%", 40100, update_every, RRDSET_TYPE_STACKED);
 930
 931                                 for(i = 0; i < cg->cpuacct_usage.cpus ;i++) {
 932                                         snprintf(id, CHART_TITLE_MAX, "cpu%d", i);
 933                                         rrddim_add(st, id, NULL, 100, 1000000, RRDDIM_INCREMENTAL);
 934                                 }
 935                         }
 936                         else rrdset_next(st);
 937
 938                         for(i = 0; i < cg->cpuacct_usage.cpus ;i++) {
 939                                 snprintf(id, CHART_TITLE_MAX, "cpu%d", i);
 940                                 rrddim_set(st, id, cg->cpuacct_usage.cpu_percpu[i]);
 941                         }
 942                         rrdset_done(st);
 943                 }
 944
 945                 if(cg->memory.updated) {
 946                         if(cg->memory.cache + cg->memory.rss + cg->memory.rss_huge + cg->memory.mapped_file > 0) {
 947                                 st = rrdset_find_bytype(type, "mem");
 948                                 if(!st) {
 949                                         snprintf(title, CHART_TITLE_MAX, "Memory Usage for cgroup %s", cg->chart_id);
 950                                         st = rrdset_create(type, "mem", NULL, "mem", "cgroup.mem", title, "MB", 40200, update_every,
 951                                                            RRDSET_TYPE_STACKED);
 952
 953                                         rrddim_add(st, "cache", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
 954                                         rrddim_add(st, "rss", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
 955                                         if(cg->memory.has_dirty_swap)
 956                                                 rrddim_add(st, "swap", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
 957                                         rrddim_add(st, "rss_huge", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
 958                                         rrddim_add(st, "mapped_file", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
 959                                 }
 960                                 else rrdset_next(st);
 961
 962                                 rrddim_set(st, "cache", cg->memory.cache);
 963                                 rrddim_set(st, "rss", cg->memory.rss);
 964                                 if(cg->memory.has_dirty_swap)
 965                                         rrddim_set(st, "swap", cg->memory.swap);
 966                                 rrddim_set(st, "rss_huge", cg->memory.rss_huge);
 967                                 rrddim_set(st, "mapped_file", cg->memory.mapped_file);
 968                                 rrdset_done(st);
 969                         }
 970
 971                         st = rrdset_find_bytype(type, "writeback");
 972                         if(!st) {
 973                                 snprintf(title, CHART_TITLE_MAX, "Writeback Memory for cgroup %s", cg->chart_id);
 974                                 st = rrdset_create(type, "writeback", NULL, "mem", "cgroup.writeback", title, "MB", 40300,
 975                                                    update_every, RRDSET_TYPE_AREA);
 976
 977                                 if(cg->memory.has_dirty_swap)
 978                                         rrddim_add(st, "dirty", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
 979                                 rrddim_add(st, "writeback", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
 980                         }
 981                         else rrdset_next(st);
 982
 983                         if(cg->memory.has_dirty_swap)
 984                                 rrddim_set(st, "dirty", cg->memory.dirty);
 985                         rrddim_set(st, "writeback", cg->memory.writeback);
 986                         rrdset_done(st);
 987
 988                         if(cg->memory.pgpgin + cg->memory.pgpgout > 0) {
 989                                 st = rrdset_find_bytype(type, "mem_activity");
 990                                 if(!st) {
 991                                         snprintf(title, CHART_TITLE_MAX, "Memory Activity for cgroup %s", cg->chart_id);
 992                                         st = rrdset_create(type, "mem_activity", NULL, "mem", "cgroup.mem_activity", title, "MB/s",
 993                                                            40400, update_every, RRDSET_TYPE_LINE);
 994
 995                                         rrddim_add(st, "pgpgin", "in", sysconf(_SC_PAGESIZE), 1024 * 1024, RRDDIM_INCREMENTAL);
 996                                         rrddim_add(st, "pgpgout", "out", -sysconf(_SC_PAGESIZE), 1024 * 1024, RRDDIM_INCREMENTAL);
 997                                 }
 998                                 else rrdset_next(st);
 999
1000                                 rrddim_set(st, "pgpgin", cg->memory.pgpgin);
1001                                 rrddim_set(st, "pgpgout", cg->memory.pgpgout);
1002                                 rrdset_done(st);
1003                         }
1004
1005                         if(cg->memory.pgfault + cg->memory.pgmajfault > 0) {
1006                                 st = rrdset_find_bytype(type, "pgfaults");
1007                                 if(!st) {
1008                                         snprintf(title, CHART_TITLE_MAX, "Memory Page Faults for cgroup %s", cg->chart_id);
1009                                         st = rrdset_create(type, "pgfaults", NULL, "mem", "cgroup.pgfaults", title, "MB/s", 40500,
1010                                                            update_every, RRDSET_TYPE_LINE);
1011
1012                                         rrddim_add(st, "pgfault", NULL, sysconf(_SC_PAGESIZE), 1024 * 1024, RRDDIM_INCREMENTAL);
1013                                         rrddim_add(st, "pgmajfault", "swap", -sysconf(_SC_PAGESIZE), 1024 * 1024, RRDDIM_INCREMENTAL);
1014                                 }
1015                                 else rrdset_next(st);
1016
1017                                 rrddim_set(st, "pgfault", cg->memory.pgfault);
1018                                 rrddim_set(st, "pgmajfault", cg->memory.pgmajfault);
1019                                 rrdset_done(st);
1020                         }
1021                 }
1022
1023                 if(cg->io_service_bytes.updated && cg->io_service_bytes.Read + cg->io_service_bytes.Write > 0) {
1024                         st = rrdset_find_bytype(type, "io");
1025                         if(!st) {
1026                                 snprintf(title, CHART_TITLE_MAX, "I/O Bandwidth (all disks) for cgroup %s", cg->chart_id);
1027                                 st = rrdset_create(type, "io", NULL, "disk", "cgroup.io", title, "KB/s", 41200,
1028                                                    update_every, RRDSET_TYPE_LINE);
1029
1030                                 rrddim_add(st, "read", NULL, 1, 1024, RRDDIM_INCREMENTAL);
1031                                 rrddim_add(st, "write", NULL, -1, 1024, RRDDIM_INCREMENTAL);
1032                         }
1033                         else rrdset_next(st);
1034
1035                         rrddim_set(st, "read", cg->io_service_bytes.Read);
1036                         rrddim_set(st, "write", cg->io_service_bytes.Write);
1037                         rrdset_done(st);
1038                 }
1039
1040                 if(cg->io_serviced.updated && cg->io_serviced.Read + cg->io_serviced.Write > 0) {
1041                         st = rrdset_find_bytype(type, "serviced_ops");
1042                         if(!st) {
1043                                 snprintf(title, CHART_TITLE_MAX, "Serviced I/O Operations (all disks) for cgroup %s", cg->chart_id);
1044                                 st = rrdset_create(type, "serviced_ops", NULL, "disk", "cgroup.serviced_ops", title, "operations/s", 41200,
1045                                                    update_every, RRDSET_TYPE_LINE);
1046
1047                                 rrddim_add(st, "read", NULL, 1, 1, RRDDIM_INCREMENTAL);
1048                                 rrddim_add(st, "write", NULL, -1, 1, RRDDIM_INCREMENTAL);
1049                         }
1050                         else rrdset_next(st);
1051
1052                         rrddim_set(st, "read", cg->io_serviced.Read);
1053                         rrddim_set(st, "write", cg->io_serviced.Write);
1054                         rrdset_done(st);
1055                 }
1056
1057                 if(cg->throttle_io_service_bytes.updated && cg->throttle_io_service_bytes.Read + cg->throttle_io_service_bytes.Write > 0) {
1058                         st = rrdset_find_bytype(type, "io");
1059                         if(!st) {
1060                                 snprintf(title, CHART_TITLE_MAX, "Throttle I/O Bandwidth (all disks) for cgroup %s", cg->chart_id);
1061                                 st = rrdset_create(type, "io", NULL, "disk", "cgroup.io", title, "KB/s", 41200,
1062                                                    update_every, RRDSET_TYPE_LINE);
1063
1064                                 rrddim_add(st, "read", NULL, 1, 1024, RRDDIM_INCREMENTAL);
1065                                 rrddim_add(st, "write", NULL, -1, 1024, RRDDIM_INCREMENTAL);
1066                         }
1067                         else rrdset_next(st);
1068
1069                         rrddim_set(st, "read", cg->throttle_io_service_bytes.Read);
1070                         rrddim_set(st, "write", cg->throttle_io_service_bytes.Write);
1071                         rrdset_done(st);
1072                 }
1073
1074
1075                 if(cg->throttle_io_serviced.updated && cg->throttle_io_serviced.Read + cg->throttle_io_serviced.Write > 0) {
1076                         st = rrdset_find_bytype(type, "throttle_serviced_ops");
1077                         if(!st) {
1078                                 snprintf(title, CHART_TITLE_MAX, "Throttle Serviced I/O Operations (all disks) for cgroup %s", cg->chart_id);
1079                                 st = rrdset_create(type, "throttle_serviced_ops", NULL, "disk", "cgroup.throttle_serviced_ops", title, "operations/s", 41200,
1080                                                    update_every, RRDSET_TYPE_LINE);
1081
1082                                 rrddim_add(st, "read", NULL, 1, 1, RRDDIM_INCREMENTAL);
1083                                 rrddim_add(st, "write", NULL, -1, 1, RRDDIM_INCREMENTAL);
1084                         }
1085                         else rrdset_next(st);
1086
1087                         rrddim_set(st, "read", cg->throttle_io_serviced.Read);
1088                         rrddim_set(st, "write", cg->throttle_io_serviced.Write);
1089                         rrdset_done(st);
1090                 }
1091
1092                 if(cg->io_queued.updated) {
1093                         st = rrdset_find_bytype(type, "queued_ops");
1094                         if(!st) {
1095                                 snprintf(title, CHART_TITLE_MAX, "Queued I/O Operations (all disks) for cgroup %s", cg->chart_id);
1096                                 st = rrdset_create(type, "queued_ops", NULL, "disk", "cgroup.queued_ops", title, "operations", 42000,
1097                                                    update_every, RRDSET_TYPE_LINE);
1098
1099                                 rrddim_add(st, "read", NULL, 1, 1, RRDDIM_ABSOLUTE);
1100                                 rrddim_add(st, "write", NULL, -1, 1, RRDDIM_ABSOLUTE);
1101                         }
1102                         else rrdset_next(st);
1103
1104                         rrddim_set(st, "read", cg->io_queued.Read);
1105                         rrddim_set(st, "write", cg->io_queued.Write);
1106                         rrdset_done(st);
1107                 }
1108
1109                 if(cg->io_merged.updated && cg->io_merged.Read + cg->io_merged.Write > 0) {
1110                         st = rrdset_find_bytype(type, "merged_ops");
1111                         if(!st) {
1112                                 snprintf(title, CHART_TITLE_MAX, "Merged I/O Operations (all disks) for cgroup %s", cg->chart_id);
1113                                 st = rrdset_create(type, "merged_ops", NULL, "disk", "cgroup.merged_ops", title, "operations/s", 42100,
1114                                                    update_every, RRDSET_TYPE_LINE);
1115
1116                                 rrddim_add(st, "read", NULL, 1, 1024, RRDDIM_INCREMENTAL);
1117                                 rrddim_add(st, "write", NULL, -1, 1024, RRDDIM_INCREMENTAL);
1118                         }
1119                         else rrdset_next(st);
1120
1121                         rrddim_set(st, "read", cg->io_merged.Read);
1122                         rrddim_set(st, "write", cg->io_merged.Write);
1123                         rrdset_done(st);
1124                 }
1125         }
1126
1127         debug(D_CGROUP, "done updating cgroups charts");
1128 }
1129
1130 // ----------------------------------------------------------------------------
1131 // cgroups main
1132
1133 int do_sys_fs_cgroup(int update_every, unsigned long long dt) {
1134         static int cgroup_global_config_read = 0;
1135         static time_t last_run = 0;
1136         time_t now = time(NULL);
1137
1138         if(dt) {};
1139
1140         if(unlikely(!cgroup_global_config_read)) {
1141                 read_cgroup_plugin_configuration();
1142                 cgroup_global_config_read = 1;
1143         }
1144
1145         if(unlikely(cgroup_enable_new_cgroups_detected_at_runtime && now - last_run > cgroup_check_for_new_every)) {
1146                 find_all_cgroups();
1147                 last_run = now;
1148         }
1149
1150         read_all_cgroups(cgroup_root);
1151         update_cgroup_charts(update_every);
1152
1153         return 0;
1154 }
1155
1156 void *cgroups_main(void *ptr)
1157 {
1158         if(ptr) { ; }
1159
1160         info("CGROUP Plugin thread created with task id %d", gettid());
1161
1162         if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
1163                 error("Cannot set pthread cancel type to DEFERRED.");
1164
1165         if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
1166                 error("Cannot set pthread cancel state to ENABLE.");
1167
1168         struct rusage thread;
1169
1170         // when ZERO, attempt to do it
1171         int vdo_sys_fs_cgroup                   = 0;
1172         int vdo_cpu_netdata                     = !config_get_boolean("plugin:cgroups", "netdata server resources", 1);
1173
1174         // keep track of the time each module was called
1175         unsigned long long sutime_sys_fs_cgroup = 0ULL;
1176
1177         // the next time we will run - aligned properly
1178         unsigned long long sunext = (time(NULL) - (time(NULL) % rrd_update_every) + rrd_update_every) * 1000000ULL;
1179         unsigned long long sunow;
1180
1181         RRDSET *stcpu_thread = NULL;
1182
1183         for(;1;) {
1184                 if(unlikely(netdata_exit)) break;
1185
1186                 // delay until it is our time to run
1187                 while((sunow = timems()) < sunext)
1188                         usleep((useconds_t)(sunext - sunow));
1189
1190                 // find the next time we need to run
1191                 while(timems() > sunext)
1192                         sunext += rrd_update_every * 1000000ULL;
1193
1194                 if(unlikely(netdata_exit)) break;
1195
1196                 // BEGIN -- the job to be done
1197
1198                 if(!vdo_sys_fs_cgroup) {
1199                         debug(D_PROCNETDEV_LOOP, "PROCNETDEV: calling do_sys_fs_cgroup().");
1200                         sunow = timems();
1201                         vdo_sys_fs_cgroup = do_sys_fs_cgroup(rrd_update_every, (sutime_sys_fs_cgroup > 0)?sunow - sutime_sys_fs_cgroup:0ULL);
1202                         sutime_sys_fs_cgroup = sunow;
1203                 }
1204                 if(unlikely(netdata_exit)) break;
1205
1206                 // END -- the job is done
1207
1208                 // --------------------------------------------------------------------
1209
1210                 if(!vdo_cpu_netdata) {
1211                         getrusage(RUSAGE_THREAD, &thread);
1212
1213                         if(!stcpu_thread) stcpu_thread = rrdset_find("netdata.plugin_cgroups_cpu");
1214                         if(!stcpu_thread) {
1215                                 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);
1216
1217                                 rrddim_add(stcpu_thread, "user",  NULL,  1, 1000, RRDDIM_INCREMENTAL);
1218                                 rrddim_add(stcpu_thread, "system", NULL, 1, 1000, RRDDIM_INCREMENTAL);
1219                         }
1220                         else rrdset_next(stcpu_thread);
1221
1222                         rrddim_set(stcpu_thread, "user"  , thread.ru_utime.tv_sec * 1000000ULL + thread.ru_utime.tv_usec);
1223                         rrddim_set(stcpu_thread, "system", thread.ru_stime.tv_sec * 1000000ULL + thread.ru_stime.tv_usec);
1224                         rrdset_done(stcpu_thread);
1225                 }
1226         }
1227
1228         pthread_exit(NULL);
1229         return NULL;
1230 }