src/sys_fs_cgroup.c

   1 #include "common.h"
   2
   3 // ----------------------------------------------------------------------------
   4 // cgroup globals
   5
   6 static int cgroup_enable_cpuacct_stat = CONFIG_ONDEMAND_ONDEMAND;
   7 static int cgroup_enable_cpuacct_usage = CONFIG_ONDEMAND_ONDEMAND;
   8 static int cgroup_enable_memory = CONFIG_ONDEMAND_ONDEMAND;
   9 static int cgroup_enable_devices = CONFIG_ONDEMAND_ONDEMAND;
  10 static int cgroup_enable_blkio = CONFIG_ONDEMAND_ONDEMAND;
  11 static int cgroup_enable_systemd_services = CONFIG_ONDEMAND_NO;
  12 static int cgroup_enable_new_cgroups_detected_at_runtime = 1;
  13 static int cgroup_check_for_new_every = 10;
  14 static int cgroup_update_every = 1;
  15 static char *cgroup_cpuacct_base = NULL;
  16 static char *cgroup_blkio_base = NULL;
  17 static char *cgroup_memory_base = NULL;
  18 static char *cgroup_devices_base = NULL;
  19
  20 static int cgroup_root_count = 0;
  21 static int cgroup_root_max = 500;
  22 static int cgroup_max_depth = 0;
  23
  24 static NETDATA_SIMPLE_PATTERN *disabled_cgroups_patterns = NULL;
  25 static NETDATA_SIMPLE_PATTERN *disabled_cgroup_paths = NULL;
  26 static NETDATA_SIMPLE_PATTERN *disabled_cgroup_renames = NULL;
  27 static NETDATA_SIMPLE_PATTERN *systemd_services_cgroups = NULL;
  28
  29 static char *cgroups_rename_script = PLUGINS_DIR "/cgroup-name.sh";
  30
  31 void read_cgroup_plugin_configuration() {
  32     cgroup_update_every = (int)config_get_number("plugin:cgroups", "update every", rrd_update_every);
  33     if(cgroup_update_every < rrd_update_every)
  34         cgroup_update_every = rrd_update_every;
  35
  36     cgroup_check_for_new_every = (int)config_get_number("plugin:cgroups", "check for new cgroups every", cgroup_check_for_new_every * cgroup_update_every);
  37     if(cgroup_check_for_new_every < cgroup_update_every)
  38         cgroup_check_for_new_every = cgroup_update_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     cgroup_enable_systemd_services = config_get_boolean_ondemand("plugin:cgroups", "enable systemd services", cgroup_enable_systemd_services);
  46
  47     char filename[FILENAME_MAX + 1], *s;
  48     struct mountinfo *mi, *root = mountinfo_read(0);
  49
  50     mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "cpuacct");
  51     if(!mi) mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "cpuacct");
  52     if(!mi) {
  53         error("Cannot find cgroup cpuacct mountinfo. Assuming default: /sys/fs/cgroup/cpuacct");
  54         s = "/sys/fs/cgroup/cpuacct";
  55     }
  56     else s = mi->mount_point;
  57     snprintfz(filename, FILENAME_MAX, "%s%s", global_host_prefix, s);
  58     cgroup_cpuacct_base = config_get("plugin:cgroups", "path to /sys/fs/cgroup/cpuacct", filename);
  59
  60     mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "blkio");
  61     if(!mi) mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "blkio");
  62     if(!mi) {
  63         error("Cannot find cgroup blkio mountinfo. Assuming default: /sys/fs/cgroup/blkio");
  64         s = "/sys/fs/cgroup/blkio";
  65     }
  66     else s = mi->mount_point;
  67     snprintfz(filename, FILENAME_MAX, "%s%s", global_host_prefix, s);
  68     cgroup_blkio_base = config_get("plugin:cgroups", "path to /sys/fs/cgroup/blkio", filename);
  69
  70     mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "memory");
  71     if(!mi) mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "memory");
  72     if(!mi) {
  73         error("Cannot find cgroup memory mountinfo. Assuming default: /sys/fs/cgroup/memory");
  74         s = "/sys/fs/cgroup/memory";
  75     }
  76     else s = mi->mount_point;
  77     snprintfz(filename, FILENAME_MAX, "%s%s", global_host_prefix, s);
  78     cgroup_memory_base = config_get("plugin:cgroups", "path to /sys/fs/cgroup/memory", filename);
  79
  80     mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "devices");
  81     if(!mi) mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "devices");
  82     if(!mi) {
  83         error("Cannot find cgroup devices mountinfo. Assuming default: /sys/fs/cgroup/devices");
  84         s = "/sys/fs/cgroup/devices";
  85     }
  86     else s = mi->mount_point;
  87     snprintfz(filename, FILENAME_MAX, "%s%s", global_host_prefix, s);
  88     cgroup_devices_base = config_get("plugin:cgroups", "path to /sys/fs/cgroup/devices", filename);
  89
  90     cgroup_root_max = (int)config_get_number("plugin:cgroups", "max cgroups to allow", cgroup_root_max);
  91     cgroup_max_depth = (int)config_get_number("plugin:cgroups", "max cgroups depth to monitor", cgroup_max_depth);
  92
  93     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);
  94
  95     disabled_cgroups_patterns = netdata_simple_pattern_list_create(
  96             config_get("plugin:cgroups", "disable by default cgroups matching",
  97                     " / /lxc /docker /libvirt /qemu /systemd "
  98                     " /system /system.slice "
  99                     " /machine /machine.slice "
 100                     " /user /user.slice "
 101                     " /init.scope "
 102                     " *.swap "
 103                     " *.slice "
 104                     " *.user "
 105                     " *.mount "
 106                     " *.partition "
 107                     " *.service "
 108                     " */ns "                               //   /lxc/*/ns    #1397
 109             ), NETDATA_SIMPLE_PATTERN_MODE_EXACT);
 110
 111     disabled_cgroup_paths = netdata_simple_pattern_list_create(
 112             config_get("plugin:cgroups", "do not search for cgroups in paths matching",
 113                     " /system "
 114                     " /systemd "
 115                     " /user.slice "
 116                     " /user "
 117                     " /init.scope "
 118                     " *-qemu "                             //  #345
 119             ), NETDATA_SIMPLE_PATTERN_MODE_EXACT);
 120
 121     cgroups_rename_script = config_get("plugin:cgroups", "script to get cgroup names", cgroups_rename_script);
 122
 123     disabled_cgroup_renames = netdata_simple_pattern_list_create(
 124             config_get("plugin:cgroups", "do not run script to rename cgroups matching",
 125                     " / "
 126                     " *.service "
 127                     " *.slice "
 128                     " *.scope "
 129                     " *.swap "
 130                     " *.mount "
 131                     " *.partition "
 132                     " *.user "
 133             ), NETDATA_SIMPLE_PATTERN_MODE_EXACT);
 134
 135     if(cgroup_enable_systemd_services)
 136         systemd_services_cgroups = netdata_simple_pattern_list_create(
 137                 config_get("plugin:cgroups", "cgroups to match as systemd services",
 138                         " /system.slice/*.service "
 139                 ), NETDATA_SIMPLE_PATTERN_MODE_EXACT);
 140
 141     mountinfo_free(root);
 142 }
 143
 144 // ----------------------------------------------------------------------------
 145 // cgroup objects
 146
 147 struct blkio {
 148     int updated;
 149
 150     char *filename;
 151
 152     unsigned long long Read;
 153     unsigned long long Write;
 154 /*
 155     unsigned long long Sync;
 156     unsigned long long Async;
 157     unsigned long long Total;
 158 */
 159 };
 160
 161 // https://www.kernel.org/doc/Documentation/cgroup-v1/memory.txt
 162 struct memory {
 163     int updated;
 164
 165     char *filename;
 166
 167     int has_dirty_swap;
 168
 169     unsigned long long cache;
 170     unsigned long long rss;
 171     unsigned long long rss_huge;
 172     unsigned long long mapped_file;
 173     unsigned long long writeback;
 174     unsigned long long dirty;
 175     unsigned long long swap;
 176     unsigned long long pgpgin;
 177     unsigned long long pgpgout;
 178     unsigned long long pgfault;
 179     unsigned long long pgmajfault;
 180 /*
 181     unsigned long long inactive_anon;
 182     unsigned long long active_anon;
 183     unsigned long long inactive_file;
 184     unsigned long long active_file;
 185     unsigned long long unevictable;
 186     unsigned long long hierarchical_memory_limit;
 187     unsigned long long total_cache;
 188     unsigned long long total_rss;
 189     unsigned long long total_rss_huge;
 190     unsigned long long total_mapped_file;
 191     unsigned long long total_writeback;
 192     unsigned long long total_dirty;
 193     unsigned long long total_swap;
 194     unsigned long long total_pgpgin;
 195     unsigned long long total_pgpgout;
 196     unsigned long long total_pgfault;
 197     unsigned long long total_pgmajfault;
 198     unsigned long long total_inactive_anon;
 199     unsigned long long total_active_anon;
 200     unsigned long long total_inactive_file;
 201     unsigned long long total_active_file;
 202     unsigned long long total_unevictable;
 203 */
 204
 205     int usage_in_bytes_updated;
 206     char *filename_usage_in_bytes;
 207     unsigned long long usage_in_bytes;
 208
 209     int msw_usage_in_bytes_updated;
 210     char *filename_msw_usage_in_bytes;
 211     unsigned long long msw_usage_in_bytes;
 212
 213     int failcnt_updated;
 214     char *filename_failcnt;
 215     unsigned long long failcnt;
 216 };
 217
 218 // https://www.kernel.org/doc/Documentation/cgroup-v1/cpuacct.txt
 219 struct cpuacct_stat {
 220     int updated;
 221
 222     char *filename;
 223
 224     unsigned long long user;
 225     unsigned long long system;
 226 };
 227
 228 // https://www.kernel.org/doc/Documentation/cgroup-v1/cpuacct.txt
 229 struct cpuacct_usage {
 230     int updated;
 231
 232     char *filename;
 233
 234     unsigned int cpus;
 235     unsigned long long *cpu_percpu;
 236 };
 237
 238 #define CGROUP_OPTIONS_DISABLED_DUPLICATE   0x00000001
 239 #define CGROUP_OPTIONS_SYSTEM_SLICE_SERVICE 0x00000002
 240
 241 struct cgroup {
 242     uint32_t options;
 243
 244     char available;      // found in the filesystem
 245     char enabled;        // enabled in the config
 246
 247     char *id;
 248     uint32_t hash;
 249
 250     char *chart_id;
 251     uint32_t hash_chart;
 252
 253     char *chart_title;
 254
 255     struct cpuacct_stat cpuacct_stat;
 256     struct cpuacct_usage cpuacct_usage;
 257
 258     struct memory memory;
 259
 260     struct blkio io_service_bytes;              // bytes
 261     struct blkio io_serviced;                   // operations
 262
 263     struct blkio throttle_io_service_bytes;     // bytes
 264     struct blkio throttle_io_serviced;          // operations
 265
 266     struct blkio io_merged;                     // operations
 267     struct blkio io_queued;                     // operations
 268
 269     RRDSET *st_cpu;
 270     RRDSET *st_cpu_per_core;
 271     RRDSET *st_mem;
 272     RRDSET *st_writeback;
 273     RRDSET *st_mem_activity;
 274     RRDSET *st_pgfaults;
 275     RRDSET *st_mem_usage;
 276     RRDSET *st_mem_failcnt;
 277     RRDSET *st_io;
 278     RRDSET *st_serviced_ops;
 279     RRDSET *st_throttle_io;
 280     RRDSET *st_throttle_serviced_ops;
 281     RRDSET *st_queued_ops;
 282     RRDSET *st_merged_ops;
 283
 284     struct cgroup *next;
 285
 286 } *cgroup_root = NULL;
 287
 288 // ----------------------------------------------------------------------------
 289 // read values from /sys
 290
 291 void cgroup_read_cpuacct_stat(struct cpuacct_stat *cp) {
 292     static procfile *ff = NULL;
 293
 294     static uint32_t user_hash = 0;
 295     static uint32_t system_hash = 0;
 296
 297     if(unlikely(user_hash == 0)) {
 298         user_hash = simple_hash("user");
 299         system_hash = simple_hash("system");
 300     }
 301
 302     cp->updated = 0;
 303     if(cp->filename) {
 304         ff = procfile_reopen(ff, cp->filename, NULL, PROCFILE_FLAG_DEFAULT);
 305         if(!ff) return;
 306
 307         ff = procfile_readall(ff);
 308         if(!ff) return;
 309
 310         unsigned long i, lines = procfile_lines(ff);
 311
 312         if(lines < 1) {
 313             error("File '%s' should have 1+ lines.", cp->filename);
 314             return;
 315         }
 316
 317         for(i = 0; i < lines ; i++) {
 318             char *s = procfile_lineword(ff, i, 0);
 319             uint32_t hash = simple_hash(s);
 320
 321             if(hash == user_hash && !strcmp(s, "user"))
 322                 cp->user = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 323
 324             else if(hash == system_hash && !strcmp(s, "system"))
 325                 cp->system = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 326         }
 327
 328         cp->updated = 1;
 329
 330         // fprintf(stderr, "READ '%s': user: %llu, system: %llu\n", cp->filename, cp->user, cp->system);
 331     }
 332 }
 333
 334 void cgroup_read_cpuacct_usage(struct cpuacct_usage *ca) {
 335     static procfile *ff = NULL;
 336
 337     ca->updated = 0;
 338     if(ca->filename) {
 339         ff = procfile_reopen(ff, ca->filename, NULL, PROCFILE_FLAG_DEFAULT);
 340         if(!ff) return;
 341
 342         ff = procfile_readall(ff);
 343         if(!ff) return;
 344
 345         if(procfile_lines(ff) < 1) {
 346             error("File '%s' should have 1+ lines but has %u.", ca->filename, procfile_lines(ff));
 347             return;
 348         }
 349
 350         unsigned long i = procfile_linewords(ff, 0);
 351         if(i == 0) return;
 352
 353         // we may have 1 more CPU reported
 354         while(i > 0) {
 355             char *s = procfile_lineword(ff, 0, i - 1);
 356             if(!*s) i--;
 357             else break;
 358         }
 359
 360         if(i != ca->cpus) {
 361             freez(ca->cpu_percpu);
 362             ca->cpu_percpu = mallocz(sizeof(unsigned long long) * i);
 363             ca->cpus = (unsigned int)i;
 364         }
 365
 366         for(i = 0; i < ca->cpus ;i++) {
 367             ca->cpu_percpu[i] = strtoull(procfile_lineword(ff, 0, i), NULL, 10);
 368             // fprintf(stderr, "READ '%s': cpu%d/%d: %llu ('%s')\n", ca->filename, i, ca->cpus, ca->cpu_percpu[i], procfile_lineword(ff, 0, i));
 369         }
 370
 371         ca->updated = 1;
 372     }
 373 }
 374
 375 void cgroup_read_blkio(struct blkio *io) {
 376     static procfile *ff = NULL;
 377
 378     static uint32_t Read_hash = 0;
 379     static uint32_t Write_hash = 0;
 380 /*
 381     static uint32_t Sync_hash = 0;
 382     static uint32_t Async_hash = 0;
 383     static uint32_t Total_hash = 0;
 384 */
 385
 386     if(unlikely(Read_hash == 0)) {
 387         Read_hash = simple_hash("Read");
 388         Write_hash = simple_hash("Write");
 389 /*
 390         Sync_hash = simple_hash("Sync");
 391         Async_hash = simple_hash("Async");
 392         Total_hash = simple_hash("Total");
 393 */
 394     }
 395
 396     io->updated = 0;
 397     if(io->filename) {
 398         ff = procfile_reopen(ff, io->filename, NULL, PROCFILE_FLAG_DEFAULT);
 399         if(!ff) return;
 400
 401         ff = procfile_readall(ff);
 402         if(!ff) return;
 403
 404         unsigned long i, lines = procfile_lines(ff);
 405
 406         if(lines < 1) {
 407             error("File '%s' should have 1+ lines.", io->filename);
 408             return;
 409         }
 410
 411         io->Read = 0;
 412         io->Write = 0;
 413 /*
 414         io->Sync = 0;
 415         io->Async = 0;
 416         io->Total = 0;
 417 */
 418
 419         for(i = 0; i < lines ; i++) {
 420             char *s = procfile_lineword(ff, i, 1);
 421             uint32_t hash = simple_hash(s);
 422
 423             if(hash == Read_hash && !strcmp(s, "Read"))
 424                 io->Read += strtoull(procfile_lineword(ff, i, 2), NULL, 10);
 425
 426             else if(hash == Write_hash && !strcmp(s, "Write"))
 427                 io->Write += strtoull(procfile_lineword(ff, i, 2), NULL, 10);
 428
 429 /*
 430             else if(hash == Sync_hash && !strcmp(s, "Sync"))
 431                 io->Sync += strtoull(procfile_lineword(ff, i, 2), NULL, 10);
 432
 433             else if(hash == Async_hash && !strcmp(s, "Async"))
 434                 io->Async += strtoull(procfile_lineword(ff, i, 2), NULL, 10);
 435
 436             else if(hash == Total_hash && !strcmp(s, "Total"))
 437                 io->Total += strtoull(procfile_lineword(ff, i, 2), NULL, 10);
 438 */
 439         }
 440
 441         io->updated = 1;
 442         // 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);
 443     }
 444 }
 445
 446 void cgroup_read_memory(struct memory *mem) {
 447     static procfile *ff = NULL;
 448
 449     static uint32_t cache_hash = 0;
 450     static uint32_t rss_hash = 0;
 451     static uint32_t rss_huge_hash = 0;
 452     static uint32_t mapped_file_hash = 0;
 453     static uint32_t writeback_hash = 0;
 454     static uint32_t dirty_hash = 0;
 455     static uint32_t swap_hash = 0;
 456     static uint32_t pgpgin_hash = 0;
 457     static uint32_t pgpgout_hash = 0;
 458     static uint32_t pgfault_hash = 0;
 459     static uint32_t pgmajfault_hash = 0;
 460 /*
 461     static uint32_t inactive_anon_hash = 0;
 462     static uint32_t active_anon_hash = 0;
 463     static uint32_t inactive_file_hash = 0;
 464     static uint32_t active_file_hash = 0;
 465     static uint32_t unevictable_hash = 0;
 466     static uint32_t hierarchical_memory_limit_hash = 0;
 467     static uint32_t total_cache_hash = 0;
 468     static uint32_t total_rss_hash = 0;
 469     static uint32_t total_rss_huge_hash = 0;
 470     static uint32_t total_mapped_file_hash = 0;
 471     static uint32_t total_writeback_hash = 0;
 472     static uint32_t total_dirty_hash = 0;
 473     static uint32_t total_swap_hash = 0;
 474     static uint32_t total_pgpgin_hash = 0;
 475     static uint32_t total_pgpgout_hash = 0;
 476     static uint32_t total_pgfault_hash = 0;
 477     static uint32_t total_pgmajfault_hash = 0;
 478     static uint32_t total_inactive_anon_hash = 0;
 479     static uint32_t total_active_anon_hash = 0;
 480     static uint32_t total_inactive_file_hash = 0;
 481     static uint32_t total_active_file_hash = 0;
 482     static uint32_t total_unevictable_hash = 0;
 483 */
 484     if(unlikely(cache_hash == 0)) {
 485         cache_hash = simple_hash("cache");
 486         rss_hash = simple_hash("rss");
 487         rss_huge_hash = simple_hash("rss_huge");
 488         mapped_file_hash = simple_hash("mapped_file");
 489         writeback_hash = simple_hash("writeback");
 490         dirty_hash = simple_hash("dirty");
 491         swap_hash = simple_hash("swap");
 492         pgpgin_hash = simple_hash("pgpgin");
 493         pgpgout_hash = simple_hash("pgpgout");
 494         pgfault_hash = simple_hash("pgfault");
 495         pgmajfault_hash = simple_hash("pgmajfault");
 496 /*
 497         inactive_anon_hash = simple_hash("inactive_anon");
 498         active_anon_hash = simple_hash("active_anon");
 499         inactive_file_hash = simple_hash("inactive_file");
 500         active_file_hash = simple_hash("active_file");
 501         unevictable_hash = simple_hash("unevictable");
 502         hierarchical_memory_limit_hash = simple_hash("hierarchical_memory_limit");
 503         total_cache_hash = simple_hash("total_cache");
 504         total_rss_hash = simple_hash("total_rss");
 505         total_rss_huge_hash = simple_hash("total_rss_huge");
 506         total_mapped_file_hash = simple_hash("total_mapped_file");
 507         total_writeback_hash = simple_hash("total_writeback");
 508         total_dirty_hash = simple_hash("total_dirty");
 509         total_swap_hash = simple_hash("total_swap");
 510         total_pgpgin_hash = simple_hash("total_pgpgin");
 511         total_pgpgout_hash = simple_hash("total_pgpgout");
 512         total_pgfault_hash = simple_hash("total_pgfault");
 513         total_pgmajfault_hash = simple_hash("total_pgmajfault");
 514         total_inactive_anon_hash = simple_hash("total_inactive_anon");
 515         total_active_anon_hash = simple_hash("total_active_anon");
 516         total_inactive_file_hash = simple_hash("total_inactive_file");
 517         total_active_file_hash = simple_hash("total_active_file");
 518         total_unevictable_hash = simple_hash("total_unevictable");
 519 */
 520     }
 521
 522     mem->updated = 0;
 523     if(mem->filename) {
 524         ff = procfile_reopen(ff, mem->filename, NULL, PROCFILE_FLAG_DEFAULT);
 525         if(!ff) return;
 526
 527         ff = procfile_readall(ff);
 528         if(!ff) return;
 529
 530         unsigned long i, lines = procfile_lines(ff);
 531
 532         if(lines < 1) {
 533             error("File '%s' should have 1+ lines.", mem->filename);
 534             return;
 535         }
 536
 537         for(i = 0; i < lines ; i++) {
 538             char *s = procfile_lineword(ff, i, 0);
 539             uint32_t hash = simple_hash(s);
 540
 541             if(hash == cache_hash && !strcmp(s, "cache"))
 542                 mem->cache = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 543
 544             else if(hash == rss_hash && !strcmp(s, "rss"))
 545                 mem->rss = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 546
 547             else if(hash == rss_huge_hash && !strcmp(s, "rss_huge"))
 548                 mem->rss_huge = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 549
 550             else if(hash == mapped_file_hash && !strcmp(s, "mapped_file"))
 551                 mem->mapped_file = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 552
 553             else if(hash == writeback_hash && !strcmp(s, "writeback"))
 554                 mem->writeback = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 555
 556             else if(hash == dirty_hash && !strcmp(s, "dirty")) {
 557                 mem->dirty = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 558                 mem->has_dirty_swap = 1;
 559             }
 560
 561             else if(hash == swap_hash && !strcmp(s, "swap")) {
 562                 mem->swap = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 563                 mem->has_dirty_swap = 1;
 564             }
 565
 566             else if(hash == pgpgin_hash && !strcmp(s, "pgpgin"))
 567                 mem->pgpgin = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 568
 569             else if(hash == pgpgout_hash && !strcmp(s, "pgpgout"))
 570                 mem->pgpgout = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 571
 572             else if(hash == pgfault_hash && !strcmp(s, "pgfault"))
 573                 mem->pgfault = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 574
 575             else if(hash == pgmajfault_hash && !strcmp(s, "pgmajfault"))
 576                 mem->pgmajfault = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 577
 578 /*
 579             else if(hash == inactive_anon_hash && !strcmp(s, "inactive_anon"))
 580                 mem->inactive_anon = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 581
 582             else if(hash == active_anon_hash && !strcmp(s, "active_anon"))
 583                 mem->active_anon = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 584
 585             else if(hash == inactive_file_hash && !strcmp(s, "inactive_file"))
 586                 mem->inactive_file = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 587
 588             else if(hash == active_file_hash && !strcmp(s, "active_file"))
 589                 mem->active_file = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 590
 591             else if(hash == unevictable_hash && !strcmp(s, "unevictable"))
 592                 mem->unevictable = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 593
 594             else if(hash == hierarchical_memory_limit_hash && !strcmp(s, "hierarchical_memory_limit"))
 595                 mem->hierarchical_memory_limit = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 596
 597             else if(hash == total_cache_hash && !strcmp(s, "total_cache"))
 598                 mem->total_cache = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 599
 600             else if(hash == total_rss_hash && !strcmp(s, "total_rss"))
 601                 mem->total_rss = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 602
 603             else if(hash == total_rss_huge_hash && !strcmp(s, "total_rss_huge"))
 604                 mem->total_rss_huge = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 605
 606             else if(hash == total_mapped_file_hash && !strcmp(s, "total_mapped_file"))
 607                 mem->total_mapped_file = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 608
 609             else if(hash == total_writeback_hash && !strcmp(s, "total_writeback"))
 610                 mem->total_writeback = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 611
 612             else if(hash == total_dirty_hash && !strcmp(s, "total_dirty"))
 613                 mem->total_dirty = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 614
 615             else if(hash == total_swap_hash && !strcmp(s, "total_swap"))
 616                 mem->total_swap = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 617
 618             else if(hash == total_pgpgin_hash && !strcmp(s, "total_pgpgin"))
 619                 mem->total_pgpgin = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 620
 621             else if(hash == total_pgpgout_hash && !strcmp(s, "total_pgpgout"))
 622                 mem->total_pgpgout = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 623
 624             else if(hash == total_pgfault_hash && !strcmp(s, "total_pgfault"))
 625                 mem->total_pgfault = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 626
 627             else if(hash == total_pgmajfault_hash && !strcmp(s, "total_pgmajfault"))
 628                 mem->total_pgmajfault = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 629
 630             else if(hash == total_inactive_anon_hash && !strcmp(s, "total_inactive_anon"))
 631                 mem->total_inactive_anon = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 632
 633             else if(hash == total_active_anon_hash && !strcmp(s, "total_active_anon"))
 634                 mem->total_active_anon = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 635
 636             else if(hash == total_inactive_file_hash && !strcmp(s, "total_inactive_file"))
 637                 mem->total_inactive_file = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 638
 639             else if(hash == total_active_file_hash && !strcmp(s, "total_active_file"))
 640                 mem->total_active_file = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 641
 642             else if(hash == total_unevictable_hash && !strcmp(s, "total_unevictable"))
 643                 mem->total_unevictable = strtoull(procfile_lineword(ff, i, 1), NULL, 10);
 644 */
 645         }
 646
 647         // 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);
 648
 649         mem->updated = 1;
 650     }
 651
 652     mem->usage_in_bytes_updated = 0;
 653     if(mem->filename_usage_in_bytes) {
 654         if(likely(!read_single_number_file(mem->filename_usage_in_bytes, &mem->usage_in_bytes)))
 655             mem->usage_in_bytes_updated = 1;
 656     }
 657
 658     mem->msw_usage_in_bytes_updated = 0;
 659     if(mem->filename_msw_usage_in_bytes) {
 660         if(likely(!read_single_number_file(mem->filename_msw_usage_in_bytes, &mem->msw_usage_in_bytes)))
 661             mem->msw_usage_in_bytes_updated = 1;
 662     }
 663
 664     mem->failcnt_updated = 0;
 665     if(mem->filename_failcnt) {
 666         if(likely(!read_single_number_file(mem->filename_failcnt, &mem->failcnt)))
 667             mem->failcnt_updated = 1;
 668     }
 669 }
 670
 671 void cgroup_read(struct cgroup *cg) {
 672     debug(D_CGROUP, "reading metrics for cgroups '%s'", cg->id);
 673
 674     cgroup_read_cpuacct_stat(&cg->cpuacct_stat);
 675     cgroup_read_cpuacct_usage(&cg->cpuacct_usage);
 676     cgroup_read_memory(&cg->memory);
 677     cgroup_read_blkio(&cg->io_service_bytes);
 678     cgroup_read_blkio(&cg->io_serviced);
 679     cgroup_read_blkio(&cg->throttle_io_service_bytes);
 680     cgroup_read_blkio(&cg->throttle_io_serviced);
 681     cgroup_read_blkio(&cg->io_merged);
 682     cgroup_read_blkio(&cg->io_queued);
 683 }
 684
 685 void read_all_cgroups(struct cgroup *root) {
 686     debug(D_CGROUP, "reading metrics for all cgroups");
 687
 688     struct cgroup *cg;
 689
 690     for(cg = root; cg ; cg = cg->next)
 691         if(cg->enabled && cg->available)
 692             cgroup_read(cg);
 693 }
 694
 695 // ----------------------------------------------------------------------------
 696 // add/remove/find cgroup objects
 697
 698 #define CGROUP_CHARTID_LINE_MAX 1024
 699
 700 static char *cgroup_title_strdupz(const char *s) {
 701     if(!s || !*s) s = "/";
 702
 703     if(*s == '/' && s[1] != '\0') s++;
 704
 705     char *r = strdupz(s);
 706     netdata_fix_chart_name(r);
 707
 708     return r;
 709 }
 710
 711 static char *cgroup_chart_id_strdupz(const char *s) {
 712     if(!s || !*s) s = "/";
 713
 714     if(*s == '/' && s[1] != '\0') s++;
 715
 716     char *r = strdupz(s);
 717     netdata_fix_chart_id(r);
 718
 719     return r;
 720 }
 721
 722 void cgroup_get_chart_name(struct cgroup *cg) {
 723     debug(D_CGROUP, "looking for the name of cgroup '%s' with chart id '%s' and title '%s'", cg->id, cg->chart_id, cg->chart_title);
 724
 725     if(!netdata_simple_pattern_list_matches(disabled_cgroup_renames, cg->id) &&
 726             !netdata_simple_pattern_list_matches(disabled_cgroup_renames, cg->chart_id)) {
 727
 728         pid_t cgroup_pid;
 729         char buffer[CGROUP_CHARTID_LINE_MAX + 1];
 730
 731         snprintfz(buffer, CGROUP_CHARTID_LINE_MAX, "exec %s '%s'", cgroups_rename_script, cg->chart_id);
 732
 733         debug(D_CGROUP, "executing command '%s' for cgroup '%s'", buffer, cg->id);
 734         FILE *fp = mypopen(buffer, &cgroup_pid);
 735         if(fp) {
 736             // debug(D_CGROUP, "reading from command '%s' for cgroup '%s'", buffer, cg->id);
 737             char *s = fgets(buffer, CGROUP_CHARTID_LINE_MAX, fp);
 738             // debug(D_CGROUP, "closing command for cgroup '%s'", cg->id);
 739             mypclose(fp, cgroup_pid);
 740             // debug(D_CGROUP, "closed command for cgroup '%s'", cg->id);
 741
 742             if(s && *s && *s != '\n') {
 743                 debug(D_CGROUP, "cgroup '%s' should be renamed to '%s'", cg->id, s);
 744
 745                 trim(s);
 746
 747                 freez(cg->chart_title);
 748                 cg->chart_title = cgroup_title_strdupz(s);
 749
 750                 freez(cg->chart_id);
 751                 cg->chart_id = cgroup_chart_id_strdupz(s);
 752                 cg->hash_chart = simple_hash(cg->chart_id);
 753             }
 754         }
 755         else
 756             error("CGROUP: Cannot popen(\"%s\", \"r\").", buffer);
 757
 758         debug(D_CGROUP, "cgroup '%s' renamed to '%s' (title: '%s')", cg->id, cg->chart_id, cg->chart_title);
 759     }
 760     else
 761         debug(D_CGROUP, "cgroup '%s' will not be renamed - it matches the list of disabled cgroup renames (will be shown as '%s')", cg->id, cg->chart_id);
 762
 763
 764     if(cgroup_enable_systemd_services) {
 765         if(netdata_simple_pattern_list_matches(systemd_services_cgroups, cg->id) ||
 766            netdata_simple_pattern_list_matches(systemd_services_cgroups, cg->chart_id)) {
 767             debug(D_CGROUP, "cgroup '%s' with chart id '%s' (title: '%s') matches systemd services cgroups", cg->id, cg->chart_id, cg->chart_title);
 768
 769             char buffer[CGROUP_CHARTID_LINE_MAX + 1];
 770             cg->options |= CGROUP_OPTIONS_SYSTEM_SLICE_SERVICE;
 771
 772             strncpy(buffer, cg->id, CGROUP_CHARTID_LINE_MAX);
 773             char *s = buffer;
 774
 775             // skip to the last slash
 776             size_t len = strlen(s);
 777             while(len--) if(unlikely(s[len] == '/')) break;
 778             if(len) s = &s[len + 1];
 779
 780             // remove extension
 781             //len = strlen(s);
 782             //while(len--) if(unlikely(s[len] == '.')) break;
 783             //if(len) s[len] = '\0';
 784
 785             freez(cg->chart_title);
 786             cg->chart_title = cgroup_title_strdupz(s);
 787
 788             freez(cg->chart_id);
 789             cg->chart_id = cgroup_chart_id_strdupz(s);
 790             cg->hash_chart = simple_hash(cg->chart_id);
 791             cg->enabled = 1;
 792
 793             debug(D_CGROUP, "cgroup '%s' renamed to '%s' (title: '%s')", cg->id, cg->chart_id, cg->chart_title);
 794         }
 795         else
 796             debug(D_CGROUP, "cgroup '%s' with chart id '%s' (title: '%s') does not match systemd services groups", cg->id, cg->chart_id, cg->chart_title);
 797     }
 798 }
 799
 800 struct cgroup *cgroup_add(const char *id) {
 801     if(!id || !*id) id = "/";
 802     debug(D_CGROUP, "adding to list, cgroup with id '%s'", id);
 803
 804     if(cgroup_root_count >= cgroup_root_max) {
 805         info("Maximum number of cgroups reached (%d). Not adding cgroup '%s'", cgroup_root_count, id);
 806         return NULL;
 807     }
 808
 809     int def = netdata_simple_pattern_list_matches(disabled_cgroups_patterns, id)?0:cgroup_enable_new_cgroups_detected_at_runtime;
 810     struct cgroup *cg = callocz(1, sizeof(struct cgroup));
 811
 812     cg->id = strdupz(id);
 813     cg->hash = simple_hash(cg->id);
 814
 815     cg->chart_title = cgroup_title_strdupz(id);
 816
 817     cg->chart_id = cgroup_chart_id_strdupz(id);
 818     cg->hash_chart = simple_hash(cg->chart_id);
 819
 820     if(!cgroup_root)
 821         cgroup_root = cg;
 822     else {
 823         // append it
 824         struct cgroup *e;
 825         for(e = cgroup_root; e->next ;e = e->next) ;
 826         e->next = cg;
 827     }
 828
 829     cgroup_root_count++;
 830
 831     // fix the name by calling the external script
 832     cgroup_get_chart_name(cg);
 833
 834     char option[FILENAME_MAX + 1];
 835     snprintfz(option, FILENAME_MAX, "enable cgroup %s", cg->chart_title);
 836     cg->enabled = (char)config_get_boolean("plugin:cgroups", option, def);
 837
 838     if(cg->enabled) {
 839         struct cgroup *t;
 840         for (t = cgroup_root; t; t = t->next) {
 841             if (t != cg && t->enabled && t->hash_chart == cg->hash_chart && !strcmp(t->chart_id, cg->chart_id)) {
 842                 if (!strncmp(t->chart_id, "/system.slice/", 14) && !strncmp(cg->chart_id, "/init.scope/system.slice/", 25)) {
 843                     error("Control group with chart id '%s' already exists with id '%s' and is enabled. Swapping them by enabling cgroup with id '%s' and disabling cgroup with id '%s'.",
 844                           cg->chart_id, t->id, cg->id, t->id);
 845                     debug(D_CGROUP, "Control group with chart id '%s' already exists with id '%s' and is enabled. Swapping them by enabling cgroup with id '%s' and disabling cgroup with id '%s'.",
 846                           cg->chart_id, t->id, cg->id, t->id);
 847                     t->enabled = 0;
 848                     t->options |= CGROUP_OPTIONS_DISABLED_DUPLICATE;
 849                 }
 850                 else {
 851                     error("Control group with chart id '%s' already exists with id '%s' and is enabled and available. Disabling cgroup with id '%s'.",
 852                           cg->chart_id, t->id, cg->id);
 853                     debug(D_CGROUP, "Control group with chart id '%s' already exists with id '%s' and is enabled and available. Disabling cgroup with id '%s'.",
 854                           cg->chart_id, t->id, cg->id);
 855                     cg->enabled = 0;
 856                     cg->options |= CGROUP_OPTIONS_DISABLED_DUPLICATE;
 857                 }
 858
 859                 break;
 860             }
 861         }
 862     }
 863
 864     debug(D_CGROUP, "ADDED CGROUP: '%s' with chart id '%s' and title '%s' as %s (default was %s)", cg->id, cg->chart_id, cg->chart_title, (cg->enabled)?"enabled":"disabled", (def)?"enabled":"disabled");
 865
 866     return cg;
 867 }
 868
 869 void cgroup_free(struct cgroup *cg) {
 870     debug(D_CGROUP, "Removing cgroup '%s' with chart id '%s' (was %s and %s)", cg->id, cg->chart_id, (cg->enabled)?"enabled":"disabled", (cg->available)?"available":"not available");
 871
 872     freez(cg->cpuacct_usage.cpu_percpu);
 873
 874     freez(cg->cpuacct_stat.filename);
 875     freez(cg->cpuacct_usage.filename);
 876
 877     freez(cg->memory.filename);
 878     freez(cg->memory.filename_failcnt);
 879     freez(cg->memory.filename_usage_in_bytes);
 880     freez(cg->memory.filename_msw_usage_in_bytes);
 881
 882     freez(cg->io_service_bytes.filename);
 883     freez(cg->io_serviced.filename);
 884
 885     freez(cg->throttle_io_service_bytes.filename);
 886     freez(cg->throttle_io_serviced.filename);
 887
 888     freez(cg->io_merged.filename);
 889     freez(cg->io_queued.filename);
 890
 891     freez(cg->id);
 892     freez(cg->chart_id);
 893     freez(cg->chart_title);
 894
 895     freez(cg);
 896
 897     cgroup_root_count--;
 898 }
 899
 900 // find if a given cgroup exists
 901 struct cgroup *cgroup_find(const char *id) {
 902     debug(D_CGROUP, "searching for cgroup '%s'", id);
 903
 904     uint32_t hash = simple_hash(id);
 905
 906     struct cgroup *cg;
 907     for(cg = cgroup_root; cg ; cg = cg->next) {
 908         if(hash == cg->hash && strcmp(id, cg->id) == 0)
 909             break;
 910     }
 911
 912     debug(D_CGROUP, "cgroup '%s' %s in memory", id, (cg)?"found":"not found");
 913     return cg;
 914 }
 915
 916 // ----------------------------------------------------------------------------
 917 // detect running cgroups
 918
 919 // callback for find_file_in_subdirs()
 920 void found_subdir_in_dir(const char *dir) {
 921     debug(D_CGROUP, "examining cgroup dir '%s'", dir);
 922
 923     struct cgroup *cg = cgroup_find(dir);
 924     if(!cg) {
 925         if(*dir && cgroup_max_depth > 0) {
 926             int depth = 0;
 927             const char *s;
 928
 929             for(s = dir; *s ;s++)
 930                 if(unlikely(*s == '/'))
 931                     depth++;
 932
 933             if(depth > cgroup_max_depth) {
 934                 info("cgroup '%s' is too deep (%d, while max is %d)", dir, depth, cgroup_max_depth);
 935                 return;
 936             }
 937         }
 938         // debug(D_CGROUP, "will add dir '%s' as cgroup", dir);
 939         cg = cgroup_add(dir);
 940     }
 941
 942     if(cg) cg->available = 1;
 943 }
 944
 945 int find_dir_in_subdirs(const char *base, const char *this, void (*callback)(const char *)) {
 946     if(!this) this = base;
 947     debug(D_CGROUP, "searching for directories in '%s' (base '%s')", this?this:"", base);
 948
 949     size_t dirlen = strlen(this), baselen = strlen(base);
 950
 951     int ret = -1;
 952     int enabled = -1;
 953
 954     const char *relative_path = &this[baselen];
 955     if(!*relative_path) relative_path = "/";
 956
 957     DIR *dir = opendir(this);
 958     if(!dir) {
 959         error("Cannot read cgroups directory '%s'", base);
 960         return ret;
 961     }
 962     ret = 1;
 963
 964     callback(relative_path);
 965
 966     struct dirent *de = NULL;
 967     while((de = readdir(dir))) {
 968         if(de->d_type == DT_DIR
 969             && (
 970                 (de->d_name[0] == '.' && de->d_name[1] == '\0')
 971                 || (de->d_name[0] == '.' && de->d_name[1] == '.' && de->d_name[2] == '\0')
 972                 ))
 973             continue;
 974
 975         if(de->d_type == DT_DIR) {
 976             if(enabled == -1) {
 977                 const char *r = relative_path;
 978                 if(*r == '\0') r = "/";
 979
 980                 // do not decent in directories we are not interested
 981                 int def = 1;
 982                 if(netdata_simple_pattern_list_matches(disabled_cgroup_paths, r))
 983                     def = 0;
 984
 985                 // we check for this option here
 986                 // so that the config will not have settings
 987                 // for leaf directories
 988                 char option[FILENAME_MAX + 1];
 989                 snprintfz(option, FILENAME_MAX, "search for cgroups under %s", r);
 990                 option[FILENAME_MAX] = '\0';
 991                 enabled = config_get_boolean("plugin:cgroups", option, def);
 992             }
 993
 994             if(enabled) {
 995                 char *s = mallocz(dirlen + strlen(de->d_name) + 2);
 996                 strcpy(s, this);
 997                 strcat(s, "/");
 998                 strcat(s, de->d_name);
 999                 int ret2 = find_dir_in_subdirs(base, s, callback);
1000                 if(ret2 > 0) ret += ret2;
1001                 freez(s);
1002             }
1003         }
1004     }
1005
1006     closedir(dir);
1007     return ret;
1008 }
1009
1010 void mark_all_cgroups_as_not_available() {
1011     debug(D_CGROUP, "marking all cgroups as not available");
1012
1013     struct cgroup *cg;
1014
1015     // mark all as not available
1016     for(cg = cgroup_root; cg ; cg = cg->next) {
1017         cg->available = 0;
1018     }
1019 }
1020
1021 void cleanup_all_cgroups() {
1022     struct cgroup *cg = cgroup_root, *last = NULL;
1023
1024     for(; cg ;) {
1025         if(!cg->available) {
1026             // enable the first duplicate cgroup
1027             {
1028                 struct cgroup *t;
1029                 for(t = cgroup_root; t ; t = t->next) {
1030                     if(t != cg && t->available && !t->enabled && t->options & CGROUP_OPTIONS_DISABLED_DUPLICATE && t->hash_chart == cg->hash_chart && !strcmp(t->chart_id, cg->chart_id)) {
1031                         debug(D_CGROUP, "Enabling duplicate of cgroup '%s' with id '%s', because the original with id '%s' stopped.", t->chart_id, t->id, cg->id);
1032                         t->enabled = 1;
1033                         t->options &= ~CGROUP_OPTIONS_DISABLED_DUPLICATE;
1034                         break;
1035                     }
1036                 }
1037             }
1038
1039             if(!last)
1040                 cgroup_root = cg->next;
1041             else
1042                 last->next = cg->next;
1043
1044             cgroup_free(cg);
1045
1046             if(!last)
1047                 cg = cgroup_root;
1048             else
1049                 cg = last->next;
1050         }
1051         else {
1052             last = cg;
1053             cg = cg->next;
1054         }
1055     }
1056 }
1057
1058 void find_all_cgroups() {
1059     debug(D_CGROUP, "searching for cgroups");
1060
1061     mark_all_cgroups_as_not_available();
1062
1063     if(cgroup_enable_cpuacct_stat || cgroup_enable_cpuacct_usage) {
1064         if (find_dir_in_subdirs(cgroup_cpuacct_base, NULL, found_subdir_in_dir) == -1) {
1065             cgroup_enable_cpuacct_stat = cgroup_enable_cpuacct_usage = 0;
1066             error("disabled cgroup cpu statistics.");
1067         }
1068     }
1069
1070     if(cgroup_enable_blkio) {
1071         if (find_dir_in_subdirs(cgroup_blkio_base, NULL, found_subdir_in_dir) == -1) {
1072             cgroup_enable_blkio = 0;
1073             error("disabled cgroup blkio statistics.");
1074         }
1075     }
1076
1077     if(cgroup_enable_memory) {
1078         if(find_dir_in_subdirs(cgroup_memory_base, NULL, found_subdir_in_dir) == -1) {
1079             cgroup_enable_memory = 0;
1080             error("disabled cgroup memory statistics.");
1081         }
1082     }
1083
1084     if(cgroup_enable_devices) {
1085         if(find_dir_in_subdirs(cgroup_devices_base, NULL, found_subdir_in_dir) == -1) {
1086             cgroup_enable_devices = 0;
1087             error("disabled cgroup devices statistics.");
1088         }
1089     }
1090
1091     // remove any non-existing cgroups
1092     cleanup_all_cgroups();
1093
1094     struct cgroup *cg;
1095     struct stat buf;
1096     for(cg = cgroup_root; cg ; cg = cg->next) {
1097         // fprintf(stderr, " >>> CGROUP '%s' (%u - %s) with name '%s'\n", cg->id, cg->hash, cg->available?"available":"stopped", cg->name);
1098
1099         if(unlikely(!cg->available))
1100             continue;
1101
1102         debug(D_CGROUP, "checking paths for cgroup '%s'", cg->id);
1103
1104         // check for newly added cgroups
1105         // and update the filenames they read
1106         char filename[FILENAME_MAX + 1];
1107         if(unlikely(cgroup_enable_cpuacct_stat && !cg->cpuacct_stat.filename)) {
1108             snprintfz(filename, FILENAME_MAX, "%s%s/cpuacct.stat", cgroup_cpuacct_base, cg->id);
1109             if(stat(filename, &buf) != -1) {
1110                 cg->cpuacct_stat.filename = strdupz(filename);
1111                 debug(D_CGROUP, "cpuacct.stat filename for cgroup '%s': '%s'", cg->id, cg->cpuacct_stat.filename);
1112             }
1113             else debug(D_CGROUP, "cpuacct.stat file for cgroup '%s': '%s' does not exist.", cg->id, filename);
1114         }
1115
1116         if(unlikely(cgroup_enable_cpuacct_usage && !cg->cpuacct_usage.filename)) {
1117             snprintfz(filename, FILENAME_MAX, "%s%s/cpuacct.usage_percpu", cgroup_cpuacct_base, cg->id);
1118             if(stat(filename, &buf) != -1) {
1119                 cg->cpuacct_usage.filename = strdupz(filename);
1120                 debug(D_CGROUP, "cpuacct.usage_percpu filename for cgroup '%s': '%s'", cg->id, cg->cpuacct_usage.filename);
1121             }
1122             else debug(D_CGROUP, "cpuacct.usage_percpu file for cgroup '%s': '%s' does not exist.", cg->id, filename);
1123         }
1124
1125         if(unlikely(cgroup_enable_memory)) {
1126             if(unlikely(!cg->memory.filename)) {
1127                 snprintfz(filename, FILENAME_MAX, "%s%s/memory.stat", cgroup_memory_base, cg->id);
1128                 if(stat(filename, &buf) != -1) {
1129                     cg->memory.filename = strdupz(filename);
1130                     debug(D_CGROUP, "memory.stat filename for cgroup '%s': '%s'", cg->id, cg->memory.filename);
1131                 }
1132                 else
1133                     debug(D_CGROUP, "memory.stat file for cgroup '%s': '%s' does not exist.", cg->id, filename);
1134             }
1135             if(unlikely(!cg->memory.filename_usage_in_bytes)) {
1136                 snprintfz(filename, FILENAME_MAX, "%s%s/memory.usage_in_bytes", cgroup_memory_base, cg->id);
1137                 if(stat(filename, &buf) != -1) {
1138                     cg->memory.filename_usage_in_bytes = strdupz(filename);
1139                     debug(D_CGROUP, "memory.usage_in_bytes filename for cgroup '%s': '%s'", cg->id, cg->memory.filename_usage_in_bytes);
1140                 }
1141                 else
1142                     debug(D_CGROUP, "memory.usage_in_bytes file for cgroup '%s': '%s' does not exist.", cg->id, filename);
1143             }
1144             if(unlikely(!cg->memory.filename_msw_usage_in_bytes)) {
1145                 snprintfz(filename, FILENAME_MAX, "%s%s/memory.msw_usage_in_bytes", cgroup_memory_base, cg->id);
1146                 if(stat(filename, &buf) != -1) {
1147                     cg->memory.filename_msw_usage_in_bytes = strdupz(filename);
1148                     debug(D_CGROUP, "memory.msw_usage_in_bytes filename for cgroup '%s': '%s'", cg->id, cg->memory.filename_msw_usage_in_bytes);
1149                 }
1150                 else
1151                     debug(D_CGROUP, "memory.msw_usage_in_bytes file for cgroup '%s': '%s' does not exist.", cg->id, filename);
1152             }
1153             if(unlikely(!cg->memory.filename_failcnt)) {
1154                 snprintfz(filename, FILENAME_MAX, "%s%s/memory.failcnt", cgroup_memory_base, cg->id);
1155                 if(stat(filename, &buf) != -1) {
1156                     cg->memory.filename_failcnt = strdupz(filename);
1157                     debug(D_CGROUP, "memory.failcnt filename for cgroup '%s': '%s'", cg->id, cg->memory.filename_failcnt);
1158                 }
1159                 else
1160                     debug(D_CGROUP, "memory.failcnt file for cgroup '%s': '%s' does not exist.", cg->id, filename);
1161             }
1162         }
1163
1164         if(unlikely(cgroup_enable_blkio)) {
1165             if(unlikely(!cg->io_service_bytes.filename)) {
1166                 snprintfz(filename, FILENAME_MAX, "%s%s/blkio.io_service_bytes", cgroup_blkio_base, cg->id);
1167                 if(stat(filename, &buf) != -1) {
1168                     cg->io_service_bytes.filename = strdupz(filename);
1169                     debug(D_CGROUP, "io_service_bytes filename for cgroup '%s': '%s'", cg->id, cg->io_service_bytes.filename);
1170                 }
1171                 else debug(D_CGROUP, "io_service_bytes file for cgroup '%s': '%s' does not exist.", cg->id, filename);
1172             }
1173             if(unlikely(!cg->io_serviced.filename)) {
1174                 snprintfz(filename, FILENAME_MAX, "%s%s/blkio.io_serviced", cgroup_blkio_base, cg->id);
1175                 if(stat(filename, &buf) != -1) {
1176                     cg->io_serviced.filename = strdupz(filename);
1177                     debug(D_CGROUP, "io_serviced filename for cgroup '%s': '%s'", cg->id, cg->io_serviced.filename);
1178                 }
1179                 else debug(D_CGROUP, "io_serviced file for cgroup '%s': '%s' does not exist.", cg->id, filename);
1180             }
1181             if(unlikely(!cg->throttle_io_service_bytes.filename)) {
1182                 snprintfz(filename, FILENAME_MAX, "%s%s/blkio.throttle.io_service_bytes", cgroup_blkio_base, cg->id);
1183                 if(stat(filename, &buf) != -1) {
1184                     cg->throttle_io_service_bytes.filename = strdupz(filename);
1185                     debug(D_CGROUP, "throttle_io_service_bytes filename for cgroup '%s': '%s'", cg->id, cg->throttle_io_service_bytes.filename);
1186                 }
1187                 else debug(D_CGROUP, "throttle_io_service_bytes file for cgroup '%s': '%s' does not exist.", cg->id, filename);
1188             }
1189             if(unlikely(!cg->throttle_io_serviced.filename)) {
1190                 snprintfz(filename, FILENAME_MAX, "%s%s/blkio.throttle.io_serviced", cgroup_blkio_base, cg->id);
1191                 if(stat(filename, &buf) != -1) {
1192                     cg->throttle_io_serviced.filename = strdupz(filename);
1193                     debug(D_CGROUP, "throttle_io_serviced filename for cgroup '%s': '%s'", cg->id, cg->throttle_io_serviced.filename);
1194                 }
1195                 else debug(D_CGROUP, "throttle_io_serviced file for cgroup '%s': '%s' does not exist.", cg->id, filename);
1196             }
1197             if(unlikely(!cg->io_merged.filename)) {
1198                 snprintfz(filename, FILENAME_MAX, "%s%s/blkio.io_merged", cgroup_blkio_base, cg->id);
1199                 if(stat(filename, &buf) != -1) {
1200                     cg->io_merged.filename = strdupz(filename);
1201                     debug(D_CGROUP, "io_merged filename for cgroup '%s': '%s'", cg->id, cg->io_merged.filename);
1202                 }
1203                 else debug(D_CGROUP, "io_merged file for cgroup '%s': '%s' does not exist.", cg->id, filename);
1204             }
1205             if(unlikely(!cg->io_queued.filename)) {
1206                 snprintfz(filename, FILENAME_MAX, "%s%s/blkio.io_queued", cgroup_blkio_base, cg->id);
1207                 if(stat(filename, &buf) != -1) {
1208                     cg->io_queued.filename = strdupz(filename);
1209                     debug(D_CGROUP, "io_queued filename for cgroup '%s': '%s'", cg->id, cg->io_queued.filename);
1210                 }
1211                 else debug(D_CGROUP, "io_queued file for cgroup '%s': '%s' does not exist.", cg->id, filename);
1212             }
1213         }
1214     }
1215
1216     debug(D_CGROUP, "done searching for cgroups");
1217     return;
1218 }
1219
1220 // ----------------------------------------------------------------------------
1221 // generate charts
1222
1223 #define CHART_TITLE_MAX 300
1224
1225 static inline char *cgroup_chart_type(char *buffer, const char *id, size_t len) {
1226     if(buffer[0]) return buffer;
1227
1228     if(id[0] == '\0' || (id[0] == '/' && id[1] == '\0'))
1229         strncpy(buffer, "cgroup_root", len);
1230     else
1231         snprintfz(buffer, len, "cgroup_%s", id);
1232
1233     netdata_fix_chart_id(buffer);
1234     return buffer;
1235 }
1236
1237 void update_cgroup_charts(int update_every) {
1238     debug(D_CGROUP, "updating cgroups charts");
1239
1240     char type[RRD_ID_LENGTH_MAX + 1];
1241     char title[CHART_TITLE_MAX + 1];
1242
1243     struct cgroup *cg;
1244
1245     for(cg = cgroup_root; cg ; cg = cg->next) {
1246         if(!cg->available || !cg->enabled || cg->options & CGROUP_OPTIONS_SYSTEM_SLICE_SERVICE)
1247             continue;
1248
1249         type[0] = '\0';
1250
1251         if(cg->cpuacct_stat.updated) {
1252             if(unlikely(!cg->st_cpu)) {
1253                 cg->st_cpu = rrdset_find_bytype(cgroup_chart_type(type, cg->chart_id, RRD_ID_LENGTH_MAX), "cpu");
1254                 if(!cg->st_cpu) {
1255                     snprintfz(title, CHART_TITLE_MAX, "CPU Usage (%d%% = %d core%s) for cgroup %s", (processors * 100), processors, (processors > 1) ? "s" : "", cg->chart_title);
1256                     cg->st_cpu = rrdset_create(type, "cpu", NULL, "cpu", "cgroup.cpu", title, "%", 40000, update_every, RRDSET_TYPE_STACKED);
1257
1258                     rrddim_add(cg->st_cpu, "user", NULL, 100, hz, RRDDIM_INCREMENTAL);
1259                     rrddim_add(cg->st_cpu, "system", NULL, 100, hz, RRDDIM_INCREMENTAL);
1260                 }
1261             }
1262             else rrdset_next(cg->st_cpu);
1263
1264             rrddim_set(cg->st_cpu, "user", cg->cpuacct_stat.user);
1265             rrddim_set(cg->st_cpu, "system", cg->cpuacct_stat.system);
1266             rrdset_done(cg->st_cpu);
1267         }
1268
1269         if(cg->cpuacct_usage.updated) {
1270             char id[RRD_ID_LENGTH_MAX + 1];
1271             unsigned int i;
1272
1273             if(unlikely(!cg->st_cpu_per_core)) {
1274                 cg->st_cpu_per_core = rrdset_find_bytype(cgroup_chart_type(type, cg->chart_id, RRD_ID_LENGTH_MAX), "cpu_per_core");
1275                 if(!cg->st_cpu_per_core) {
1276                     snprintfz(title, CHART_TITLE_MAX, "CPU Usage (%d%% = %d core%s) Per Core for cgroup %s", (processors * 100), processors, (processors > 1) ? "s" : "", cg->chart_title);
1277                     cg->st_cpu_per_core = rrdset_create(type, "cpu_per_core", NULL, "cpu", "cgroup.cpu_per_core", title, "%", 40100, update_every, RRDSET_TYPE_STACKED);
1278
1279                     for(i = 0; i < cg->cpuacct_usage.cpus; i++) {
1280                         snprintfz(id, CHART_TITLE_MAX, "cpu%u", i);
1281                         rrddim_add(cg->st_cpu_per_core, id, NULL, 100, 1000000000, RRDDIM_INCREMENTAL);
1282                     }
1283                 }
1284             }
1285             else rrdset_next(cg->st_cpu_per_core);
1286
1287             for(i = 0; i < cg->cpuacct_usage.cpus ;i++) {
1288                 snprintfz(id, CHART_TITLE_MAX, "cpu%u", i);
1289                 rrddim_set(cg->st_cpu_per_core, id, cg->cpuacct_usage.cpu_percpu[i]);
1290             }
1291             rrdset_done(cg->st_cpu_per_core);
1292         }
1293
1294         if(cg->memory.updated) {
1295             if(cg->memory.cache + cg->memory.rss + cg->memory.rss_huge + cg->memory.mapped_file > 0) {
1296                 if(unlikely(!cg->st_mem)) {
1297                     cg->st_mem = rrdset_find_bytype(cgroup_chart_type(type, cg->chart_id, RRD_ID_LENGTH_MAX), "mem");
1298                     if(!cg->st_mem) {
1299                         snprintfz(title, CHART_TITLE_MAX, "Memory Usage for cgroup %s", cg->chart_title);
1300                         cg->st_mem = rrdset_create(type, "mem", NULL, "mem", "cgroup.mem", title, "MB", 40210, update_every, RRDSET_TYPE_STACKED);
1301
1302                         rrddim_add(cg->st_mem, "cache", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
1303                         rrddim_add(cg->st_mem, "rss", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
1304                         if(cg->memory.has_dirty_swap)
1305                             rrddim_add(cg->st_mem, "swap", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
1306                         rrddim_add(cg->st_mem, "rss_huge", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
1307                         rrddim_add(cg->st_mem, "mapped_file", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
1308                     }
1309                 }
1310                 else rrdset_next(cg->st_mem);
1311
1312                 rrddim_set(cg->st_mem, "cache", cg->memory.cache);
1313                 rrddim_set(cg->st_mem, "rss", cg->memory.rss);
1314                 if(cg->memory.has_dirty_swap)
1315                     rrddim_set(cg->st_mem, "swap", cg->memory.swap);
1316                 rrddim_set(cg->st_mem, "rss_huge", cg->memory.rss_huge);
1317                 rrddim_set(cg->st_mem, "mapped_file", cg->memory.mapped_file);
1318                 rrdset_done(cg->st_mem);
1319             }
1320
1321             if(unlikely(!cg->st_writeback)) {
1322                 cg->st_writeback = rrdset_find_bytype(cgroup_chart_type(type, cg->chart_id, RRD_ID_LENGTH_MAX), "writeback");
1323                 if(!cg->st_writeback) {
1324                     snprintfz(title, CHART_TITLE_MAX, "Writeback Memory for cgroup %s", cg->chart_title);
1325                     cg->st_writeback = rrdset_create(type, "writeback", NULL, "mem", "cgroup.writeback", title, "MB", 40300, update_every, RRDSET_TYPE_AREA);
1326
1327                     if(cg->memory.has_dirty_swap)
1328                         rrddim_add(cg->st_writeback, "dirty", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
1329                     rrddim_add(cg->st_writeback, "writeback", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
1330                 }
1331             }
1332             else rrdset_next(cg->st_writeback);
1333
1334             if(cg->memory.has_dirty_swap)
1335                 rrddim_set(cg->st_writeback, "dirty", cg->memory.dirty);
1336             rrddim_set(cg->st_writeback, "writeback", cg->memory.writeback);
1337             rrdset_done(cg->st_writeback);
1338
1339             if(cg->memory.pgpgin + cg->memory.pgpgout > 0) {
1340                 if(unlikely(!cg->st_mem_activity)) {
1341                     cg->st_mem_activity = rrdset_find_bytype(cgroup_chart_type(type, cg->chart_id, RRD_ID_LENGTH_MAX), "mem_activity");
1342                     if(!cg->st_mem_activity) {
1343                         snprintfz(title, CHART_TITLE_MAX, "Memory Activity for cgroup %s", cg->chart_title);
1344                         cg->st_mem_activity = rrdset_create(type, "mem_activity", NULL, "mem", "cgroup.mem_activity", title, "MB/s", 40400, update_every, RRDSET_TYPE_LINE);
1345
1346                         rrddim_add(cg->st_mem_activity, "pgpgin", "in", sysconf(_SC_PAGESIZE), 1024 * 1024, RRDDIM_INCREMENTAL);
1347                         rrddim_add(cg->st_mem_activity, "pgpgout", "out", -sysconf(_SC_PAGESIZE), 1024 * 1024, RRDDIM_INCREMENTAL);
1348                     }
1349                 }
1350                 else rrdset_next(cg->st_mem_activity);
1351
1352                 rrddim_set(cg->st_mem_activity, "pgpgin", cg->memory.pgpgin);
1353                 rrddim_set(cg->st_mem_activity, "pgpgout", cg->memory.pgpgout);
1354                 rrdset_done(cg->st_mem_activity);
1355             }
1356
1357             if(cg->memory.pgfault + cg->memory.pgmajfault > 0) {
1358                 if(unlikely(!cg->st_pgfaults)) {
1359                     cg->st_pgfaults = rrdset_find_bytype(cgroup_chart_type(type, cg->chart_id, RRD_ID_LENGTH_MAX), "pgfaults");
1360                     if(!cg->st_pgfaults) {
1361                         snprintfz(title, CHART_TITLE_MAX, "Memory Page Faults for cgroup %s", cg->chart_title);
1362                         cg->st_pgfaults = rrdset_create(type, "pgfaults", NULL, "mem", "cgroup.pgfaults", title, "MB/s", 40500, update_every, RRDSET_TYPE_LINE);
1363
1364                         rrddim_add(cg->st_pgfaults, "pgfault", NULL, sysconf(_SC_PAGESIZE), 1024 * 1024, RRDDIM_INCREMENTAL);
1365                         rrddim_add(cg->st_pgfaults, "pgmajfault", "swap", -sysconf(_SC_PAGESIZE), 1024 * 1024, RRDDIM_INCREMENTAL);
1366                     }
1367                 }
1368                 else rrdset_next(cg->st_pgfaults);
1369
1370                 rrddim_set(cg->st_pgfaults, "pgfault", cg->memory.pgfault);
1371                 rrddim_set(cg->st_pgfaults, "pgmajfault", cg->memory.pgmajfault);
1372                 rrdset_done(cg->st_pgfaults);
1373             }
1374         }
1375
1376         if(cg->memory.usage_in_bytes_updated) {
1377             if(unlikely(!cg->st_mem_usage)) {
1378                 cg->st_mem_usage = rrdset_find_bytype(cgroup_chart_type(type, cg->chart_id, RRD_ID_LENGTH_MAX), "mem_usage");
1379                 if(!cg->st_mem_usage) {
1380                     snprintfz(title, CHART_TITLE_MAX, "Total Memory for cgroup %s", cg->chart_title);
1381                     cg->st_mem_usage = rrdset_create(type, "mem_usage", NULL, "mem", "cgroup.mem_usage", title, "MB", 40200, update_every, RRDSET_TYPE_STACKED);
1382
1383                     rrddim_add(cg->st_mem_usage, "ram", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
1384                     rrddim_add(cg->st_mem_usage, "swap", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
1385                 }
1386             }
1387             else rrdset_next(cg->st_mem_usage);
1388
1389             rrddim_set(cg->st_mem_usage, "ram", cg->memory.usage_in_bytes);
1390             rrddim_set(cg->st_mem_usage, "swap", (cg->memory.msw_usage_in_bytes > cg->memory.usage_in_bytes)?cg->memory.msw_usage_in_bytes - cg->memory.usage_in_bytes:0);
1391             rrdset_done(cg->st_mem_usage);
1392         }
1393
1394         if(cg->memory.failcnt_updated && cg->memory.failcnt > 0) {
1395             if(unlikely(!cg->st_mem_failcnt)) {
1396                 cg->st_mem_failcnt = rrdset_find_bytype(cgroup_chart_type(type, cg->chart_id, RRD_ID_LENGTH_MAX), "mem_failcnt");
1397                 if(!cg->st_mem_failcnt) {
1398                     snprintfz(title, CHART_TITLE_MAX, "Memory Limit Failures for cgroup %s", cg->chart_title);
1399                     cg->st_mem_failcnt = rrdset_create(type, "mem_failcnt", NULL, "mem", "cgroup.mem_failcnt", title, "MB", 40250, update_every, RRDSET_TYPE_LINE);
1400
1401                     rrddim_add(cg->st_mem_failcnt, "failures", NULL, 1, 1, RRDDIM_INCREMENTAL);
1402                 }
1403             }
1404             else rrdset_next(cg->st_mem_failcnt);
1405
1406             rrddim_set(cg->st_mem_failcnt, "failures", cg->memory.failcnt);
1407             rrdset_done(cg->st_mem_failcnt);
1408         }
1409
1410         if(cg->io_service_bytes.updated && cg->io_service_bytes.Read + cg->io_service_bytes.Write > 0) {
1411             if(unlikely(!cg->st_io)) {
1412                 cg->st_io = rrdset_find_bytype(cgroup_chart_type(type, cg->chart_id, RRD_ID_LENGTH_MAX), "io");
1413                 if(!cg->st_io) {
1414                     snprintfz(title, CHART_TITLE_MAX, "I/O Bandwidth (all disks) for cgroup %s", cg->chart_title);
1415                     cg->st_io = rrdset_create(type, "io", NULL, "disk", "cgroup.io", title, "KB/s", 41200, update_every, RRDSET_TYPE_AREA);
1416
1417                     rrddim_add(cg->st_io, "read", NULL, 1, 1024, RRDDIM_INCREMENTAL);
1418                     rrddim_add(cg->st_io, "write", NULL, -1, 1024, RRDDIM_INCREMENTAL);
1419                 }
1420             }
1421             else rrdset_next(cg->st_io);
1422
1423             rrddim_set(cg->st_io, "read", cg->io_service_bytes.Read);
1424             rrddim_set(cg->st_io, "write", cg->io_service_bytes.Write);
1425             rrdset_done(cg->st_io);
1426         }
1427
1428         if(cg->io_serviced.updated && cg->io_serviced.Read + cg->io_serviced.Write > 0) {
1429             if(unlikely(!cg->st_serviced_ops)) {
1430                 cg->st_serviced_ops = rrdset_find_bytype(cgroup_chart_type(type, cg->chart_id, RRD_ID_LENGTH_MAX), "serviced_ops");
1431                 if(!cg->st_serviced_ops) {
1432                     snprintfz(title, CHART_TITLE_MAX, "Serviced I/O Operations (all disks) for cgroup %s"
1433                               , cg->chart_title);
1434                     cg->st_serviced_ops = rrdset_create(type, "serviced_ops", NULL, "disk", "cgroup.serviced_ops", title, "operations/s", 41200, update_every, RRDSET_TYPE_LINE);
1435
1436                     rrddim_add(cg->st_serviced_ops, "read", NULL, 1, 1, RRDDIM_INCREMENTAL);
1437                     rrddim_add(cg->st_serviced_ops, "write", NULL, -1, 1, RRDDIM_INCREMENTAL);
1438                 }
1439             }
1440             else rrdset_next(cg->st_serviced_ops);
1441
1442             rrddim_set(cg->st_serviced_ops, "read", cg->io_serviced.Read);
1443             rrddim_set(cg->st_serviced_ops, "write", cg->io_serviced.Write);
1444             rrdset_done(cg->st_serviced_ops);
1445         }
1446
1447         if(cg->throttle_io_service_bytes.updated && cg->throttle_io_service_bytes.Read + cg->throttle_io_service_bytes.Write > 0) {
1448             if(unlikely(!cg->st_throttle_io)) {
1449                 cg->st_throttle_io = rrdset_find_bytype(cgroup_chart_type(type, cg->chart_id, RRD_ID_LENGTH_MAX), "throttle_io");
1450                 if(!cg->st_throttle_io) {
1451                     snprintfz(title, CHART_TITLE_MAX, "Throttle I/O Bandwidth (all disks) for cgroup %s", cg->chart_title);
1452                     cg->st_throttle_io = rrdset_create(type, "throttle_io", NULL, "disk", "cgroup.throttle_io", title, "KB/s", 41200, update_every, RRDSET_TYPE_AREA);
1453
1454                     rrddim_add(cg->st_throttle_io, "read", NULL, 1, 1024, RRDDIM_INCREMENTAL);
1455                     rrddim_add(cg->st_throttle_io, "write", NULL, -1, 1024, RRDDIM_INCREMENTAL);
1456                 }
1457             }
1458             else rrdset_next(cg->st_throttle_io);
1459
1460             rrddim_set(cg->st_throttle_io, "read", cg->throttle_io_service_bytes.Read);
1461             rrddim_set(cg->st_throttle_io, "write", cg->throttle_io_service_bytes.Write);
1462             rrdset_done(cg->st_throttle_io);
1463         }
1464
1465
1466         if(cg->throttle_io_serviced.updated && cg->throttle_io_serviced.Read + cg->throttle_io_serviced.Write > 0) {
1467             if(unlikely(!cg->st_throttle_serviced_ops)) {
1468                 cg->st_throttle_serviced_ops = rrdset_find_bytype(cgroup_chart_type(type, cg->chart_id, RRD_ID_LENGTH_MAX), "throttle_serviced_ops");
1469                 if(!cg->st_throttle_serviced_ops) {
1470                     snprintfz(title, CHART_TITLE_MAX, "Throttle Serviced I/O Operations (all disks) for cgroup %s", cg->chart_title);
1471                     cg->st_throttle_serviced_ops = rrdset_create(type, "throttle_serviced_ops", NULL, "disk", "cgroup.throttle_serviced_ops", title, "operations/s", 41200, update_every, RRDSET_TYPE_LINE);
1472
1473                     rrddim_add(cg->st_throttle_serviced_ops, "read", NULL, 1, 1, RRDDIM_INCREMENTAL);
1474                     rrddim_add(cg->st_throttle_serviced_ops, "write", NULL, -1, 1, RRDDIM_INCREMENTAL);
1475                 }
1476             }
1477             else rrdset_next(cg->st_throttle_serviced_ops);
1478
1479             rrddim_set(cg->st_throttle_serviced_ops, "read", cg->throttle_io_serviced.Read);
1480             rrddim_set(cg->st_throttle_serviced_ops, "write", cg->throttle_io_serviced.Write);
1481             rrdset_done(cg->st_throttle_serviced_ops);
1482         }
1483
1484         if(cg->io_queued.updated) {
1485             if(unlikely(!cg->st_queued_ops)) {
1486                 cg->st_queued_ops = rrdset_find_bytype(cgroup_chart_type(type, cg->chart_id, RRD_ID_LENGTH_MAX), "queued_ops");
1487                 if(!cg->st_queued_ops) {
1488                     snprintfz(title, CHART_TITLE_MAX, "Queued I/O Operations (all disks) for cgroup %s", cg->chart_title);
1489                     cg->st_queued_ops = rrdset_create(type, "queued_ops", NULL, "disk", "cgroup.queued_ops", title, "operations", 42000, update_every, RRDSET_TYPE_LINE);
1490
1491                     rrddim_add(cg->st_queued_ops, "read", NULL, 1, 1, RRDDIM_ABSOLUTE);
1492                     rrddim_add(cg->st_queued_ops, "write", NULL, -1, 1, RRDDIM_ABSOLUTE);
1493                 }
1494             }
1495             else rrdset_next(cg->st_queued_ops);
1496
1497             rrddim_set(cg->st_queued_ops, "read", cg->io_queued.Read);
1498             rrddim_set(cg->st_queued_ops, "write", cg->io_queued.Write);
1499             rrdset_done(cg->st_queued_ops);
1500         }
1501
1502         if(cg->io_merged.updated && cg->io_merged.Read + cg->io_merged.Write > 0) {
1503             if(unlikely(!cg->st_merged_ops)) {
1504                 cg->st_merged_ops = rrdset_find_bytype(cgroup_chart_type(type, cg->chart_id, RRD_ID_LENGTH_MAX), "merged_ops");
1505                 if(!cg->st_merged_ops) {
1506                     snprintfz(title, CHART_TITLE_MAX, "Merged I/O Operations (all disks) for cgroup %s", cg->chart_title);
1507                     cg->st_merged_ops = rrdset_create(type, "merged_ops", NULL, "disk", "cgroup.merged_ops", title, "operations/s", 42100, update_every, RRDSET_TYPE_LINE);
1508
1509                     rrddim_add(cg->st_merged_ops, "read", NULL, 1, 1024, RRDDIM_INCREMENTAL);
1510                     rrddim_add(cg->st_merged_ops, "write", NULL, -1, 1024, RRDDIM_INCREMENTAL);
1511                 }
1512             }
1513             else rrdset_next(cg->st_merged_ops);
1514
1515             rrddim_set(cg->st_merged_ops, "read", cg->io_merged.Read);
1516             rrddim_set(cg->st_merged_ops, "write", cg->io_merged.Write);
1517             rrdset_done(cg->st_merged_ops);
1518         }
1519     }
1520
1521     debug(D_CGROUP, "done updating cgroups charts");
1522 }
1523
1524 // ----------------------------------------------------------------------------
1525 // cgroups main
1526
1527 void *cgroups_main(void *ptr) {
1528     struct netdata_static_thread *static_thread = (struct netdata_static_thread *)ptr;
1529
1530     info("CGROUP Plugin thread created with task id %d", gettid());
1531
1532     if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
1533         error("Cannot set pthread cancel type to DEFERRED.");
1534
1535     if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
1536         error("Cannot set pthread cancel state to ENABLE.");
1537
1538     struct rusage thread;
1539
1540     // when ZERO, attempt to do it
1541     int vdo_cpu_netdata = config_get_boolean("plugin:cgroups", "cgroups plugin resources", 1);
1542
1543     read_cgroup_plugin_configuration();
1544
1545     RRDSET *stcpu_thread = NULL;
1546
1547     usec_t step = cgroup_update_every * USEC_PER_SEC;
1548     usec_t find_every = cgroup_check_for_new_every * USEC_PER_SEC, find_next = 0;
1549     for(;;) {
1550         usec_t now = now_monotonic_usec();
1551         usec_t next = now - (now % step) + step;
1552
1553         while(now < next) {
1554             sleep_usec(next - now);
1555             now = now_monotonic_usec();
1556         }
1557
1558         if(unlikely(netdata_exit)) break;
1559
1560         // BEGIN -- the job to be done
1561
1562         if(unlikely(now >= find_next)) {
1563             find_all_cgroups();
1564             find_next = now + find_every;
1565         }
1566
1567         read_all_cgroups(cgroup_root);
1568         update_cgroup_charts(cgroup_update_every);
1569
1570         // END -- the job is done
1571
1572         // --------------------------------------------------------------------
1573
1574         if(vdo_cpu_netdata) {
1575             getrusage(RUSAGE_THREAD, &thread);
1576
1577             if(!stcpu_thread) stcpu_thread = rrdset_find("netdata.plugin_cgroups_cpu");
1578             if(!stcpu_thread) {
1579                 stcpu_thread = rrdset_create("netdata", "plugin_cgroups_cpu", NULL, "cgroups", NULL, "NetData CGroups Plugin CPU usage", "milliseconds/s", 132000, cgroup_update_every, RRDSET_TYPE_STACKED);
1580
1581                 rrddim_add(stcpu_thread, "user",  NULL,  1, 1000, RRDDIM_INCREMENTAL);
1582                 rrddim_add(stcpu_thread, "system", NULL, 1, 1000, RRDDIM_INCREMENTAL);
1583             }
1584             else rrdset_next(stcpu_thread);
1585
1586             rrddim_set(stcpu_thread, "user"  , thread.ru_utime.tv_sec * 1000000ULL + thread.ru_utime.tv_usec);
1587             rrddim_set(stcpu_thread, "system", thread.ru_stime.tv_sec * 1000000ULL + thread.ru_stime.tv_usec);
1588             rrdset_done(stcpu_thread);
1589         }
1590     }
1591
1592     info("CGROUP thread exiting");
1593
1594     static_thread->enabled = 0;
1595     pthread_exit(NULL);
1596     return NULL;
1597 }