src/proc_stat.c

   1 #include "common.h"
   2
   3 int do_proc_stat(int update_every, unsigned long long dt) {
   4         (void)dt;
   5
   6         static procfile *ff = NULL;
   7         static int do_cpu = -1, do_cpu_cores = -1, do_interrupts = -1, do_context = -1, do_forks = -1, do_processes = -1;
   8         static uint32_t hash_intr, hash_ctxt, hash_processes, hash_procs_running, hash_procs_blocked;
   9
  10         if(unlikely(do_cpu == -1)) {
  11                 do_cpu                  = config_get_boolean("plugin:proc:/proc/stat", "cpu utilization", 1);
  12                 do_cpu_cores    = config_get_boolean("plugin:proc:/proc/stat", "per cpu core utilization", 1);
  13                 do_interrupts   = config_get_boolean("plugin:proc:/proc/stat", "cpu interrupts", 1);
  14                 do_context              = config_get_boolean("plugin:proc:/proc/stat", "context switches", 1);
  15                 do_forks                = config_get_boolean("plugin:proc:/proc/stat", "processes started", 1);
  16                 do_processes    = config_get_boolean("plugin:proc:/proc/stat", "processes running", 1);
  17
  18                 hash_intr = simple_hash("intr");
  19                 hash_ctxt = simple_hash("ctxt");
  20                 hash_processes = simple_hash("processes");
  21                 hash_procs_running = simple_hash("procs_running");
  22                 hash_procs_blocked = simple_hash("procs_blocked");
  23         }
  24
  25         if(unlikely(!ff)) {
  26                 char filename[FILENAME_MAX + 1];
  27                 snprintfz(filename, FILENAME_MAX, "%s%s", global_host_prefix, "/proc/stat");
  28                 ff = procfile_open(config_get("plugin:proc:/proc/stat", "filename to monitor", filename), " \t:", PROCFILE_FLAG_DEFAULT);
  29                 if(unlikely(!ff)) return 1;
  30         }
  31
  32         ff = procfile_readall(ff);
  33         if(unlikely(!ff)) return 0; // we return 0, so that we will retry to open it next time
  34
  35         uint32_t lines = procfile_lines(ff), l;
  36         uint32_t words;
  37
  38         unsigned long long processes = 0, running = 0 , blocked = 0;
  39         RRDSET *st;
  40
  41         for(l = 0; l < lines ;l++) {
  42                 char *row_key = procfile_lineword(ff, l, 0);
  43                 uint32_t hash = simple_hash(row_key);
  44
  45                 // faster strncmp(row_key, "cpu", 3) == 0
  46                 if(likely(row_key[0] == 'c' && row_key[1] == 'p' && row_key[2] == 'u')) {
  47                         words = procfile_linewords(ff, l);
  48                         if(unlikely(words < 9)) {
  49                                 error("Cannot read /proc/stat cpu line. Expected 9 params, read %u.", words);
  50                                 continue;
  51                         }
  52
  53                         char *id;
  54                         unsigned long long user = 0, nice = 0, system = 0, idle = 0, iowait = 0, irq = 0, softirq = 0, steal = 0, guest = 0, guest_nice = 0;
  55
  56                         id                      = row_key;
  57                         user            = strtoull(procfile_lineword(ff, l, 1), NULL, 10);
  58                         nice            = strtoull(procfile_lineword(ff, l, 2), NULL, 10);
  59                         system          = strtoull(procfile_lineword(ff, l, 3), NULL, 10);
  60                         idle            = strtoull(procfile_lineword(ff, l, 4), NULL, 10);
  61                         iowait          = strtoull(procfile_lineword(ff, l, 5), NULL, 10);
  62                         irq                     = strtoull(procfile_lineword(ff, l, 6), NULL, 10);
  63                         softirq         = strtoull(procfile_lineword(ff, l, 7), NULL, 10);
  64                         steal           = strtoull(procfile_lineword(ff, l, 8), NULL, 10);
  65
  66                         guest           = strtoull(procfile_lineword(ff, l, 9), NULL, 10);
  67                         user -= guest;
  68
  69                         guest_nice      = strtoull(procfile_lineword(ff, l, 10), NULL, 10);
  70                         nice -= guest_nice;
  71
  72                         char *title, *type, *context, *family;
  73                         long priority;
  74                         int isthistotal;
  75
  76                         if(unlikely(strcmp(id, "cpu")) == 0) {
  77                                 title = "Total CPU utilization";
  78                                 type = "system";
  79                                 context = "system.cpu";
  80                                 family = id;
  81                                 priority = 100;
  82                                 isthistotal = 1;
  83                         }
  84                         else {
  85                                 title = "Core utilization";
  86                                 type = "cpu";
  87                                 context = "cpu.cpu";
  88                                 family = "utilization";
  89                                 priority = 1000;
  90                                 isthistotal = 0;
  91                         }
  92
  93                         if(likely((isthistotal && do_cpu) || (!isthistotal && do_cpu_cores))) {
  94                                 st = rrdset_find_bytype(type, id);
  95                                 if(unlikely(!st)) {
  96                                         st = rrdset_create(type, id, NULL, family, context, title, "percentage", priority, update_every, RRDSET_TYPE_STACKED);
  97
  98                                         long multiplier = 1;
  99                                         long divisor = 1; // sysconf(_SC_CLK_TCK);
 100
 101                                         rrddim_add(st, "guest_nice", NULL, multiplier, divisor, RRDDIM_PCENT_OVER_DIFF_TOTAL);
 102                                         rrddim_add(st, "guest", NULL, multiplier, divisor, RRDDIM_PCENT_OVER_DIFF_TOTAL);
 103                                         rrddim_add(st, "steal", NULL, multiplier, divisor, RRDDIM_PCENT_OVER_DIFF_TOTAL);
 104                                         rrddim_add(st, "softirq", NULL, multiplier, divisor, RRDDIM_PCENT_OVER_DIFF_TOTAL);
 105                                         rrddim_add(st, "irq", NULL, multiplier, divisor, RRDDIM_PCENT_OVER_DIFF_TOTAL);
 106                                         rrddim_add(st, "user", NULL, multiplier, divisor, RRDDIM_PCENT_OVER_DIFF_TOTAL);
 107                                         rrddim_add(st, "system", NULL, multiplier, divisor, RRDDIM_PCENT_OVER_DIFF_TOTAL);
 108                                         rrddim_add(st, "nice", NULL, multiplier, divisor, RRDDIM_PCENT_OVER_DIFF_TOTAL);
 109                                         rrddim_add(st, "iowait", NULL, multiplier, divisor, RRDDIM_PCENT_OVER_DIFF_TOTAL);
 110
 111                                         rrddim_add(st, "idle", NULL, multiplier, divisor, RRDDIM_PCENT_OVER_DIFF_TOTAL);
 112                                         rrddim_hide(st, "idle");
 113                                 }
 114                                 else rrdset_next(st);
 115
 116                                 rrddim_set(st, "user", user);
 117                                 rrddim_set(st, "nice", nice);
 118                                 rrddim_set(st, "system", system);
 119                                 rrddim_set(st, "idle", idle);
 120                                 rrddim_set(st, "iowait", iowait);
 121                                 rrddim_set(st, "irq", irq);
 122                                 rrddim_set(st, "softirq", softirq);
 123                                 rrddim_set(st, "steal", steal);
 124                                 rrddim_set(st, "guest", guest);
 125                                 rrddim_set(st, "guest_nice", guest_nice);
 126                                 rrdset_done(st);
 127                         }
 128                 }
 129                 else if(hash == hash_intr && strcmp(row_key, "intr") == 0) {
 130                         unsigned long long value = strtoull(procfile_lineword(ff, l, 1), NULL, 10);
 131
 132                         // --------------------------------------------------------------------
 133
 134                         if(likely(do_interrupts)) {
 135                                 st = rrdset_find_bytype("system", "intr");
 136                                 if(unlikely(!st)) {
 137                                         st = rrdset_create("system", "intr", NULL, "interrupts", NULL, "CPU Interrupts", "interrupts/s", 900, update_every, RRDSET_TYPE_LINE);
 138                                         st->isdetail = 1;
 139
 140                                         rrddim_add(st, "interrupts", NULL, 1, 1, RRDDIM_INCREMENTAL);
 141                                 }
 142                                 else rrdset_next(st);
 143
 144                                 rrddim_set(st, "interrupts", value);
 145                                 rrdset_done(st);
 146                         }
 147                 }
 148                 else if(hash == hash_ctxt && strcmp(row_key, "ctxt") == 0) {
 149                         unsigned long long value = strtoull(procfile_lineword(ff, l, 1), NULL, 10);
 150
 151                         // --------------------------------------------------------------------
 152
 153                         if(likely(do_context)) {
 154                                 st = rrdset_find_bytype("system", "ctxt");
 155                                 if(unlikely(!st)) {
 156                                         st = rrdset_create("system", "ctxt", NULL, "processes", NULL, "CPU Context Switches", "context switches/s", 800, update_every, RRDSET_TYPE_LINE);
 157
 158                                         rrddim_add(st, "switches", NULL, 1, 1, RRDDIM_INCREMENTAL);
 159                                 }
 160                                 else rrdset_next(st);
 161
 162                                 rrddim_set(st, "switches", value);
 163                                 rrdset_done(st);
 164                         }
 165                 }
 166                 else if(hash == hash_processes && !processes && strcmp(row_key, "processes") == 0) {
 167                         processes = strtoull(procfile_lineword(ff, l, 1), NULL, 10);
 168                 }
 169                 else if(hash == hash_procs_running && !running && strcmp(row_key, "procs_running") == 0) {
 170                         running = strtoull(procfile_lineword(ff, l, 1), NULL, 10);
 171                 }
 172                 else if(hash == hash_procs_blocked && !blocked && strcmp(row_key, "procs_blocked") == 0) {
 173                         blocked = strtoull(procfile_lineword(ff, l, 1), NULL, 10);
 174                 }
 175         }
 176
 177         // --------------------------------------------------------------------
 178
 179         if(likely(do_forks)) {
 180                 st = rrdset_find_bytype("system", "forks");
 181                 if(unlikely(!st)) {
 182                         st = rrdset_create("system", "forks", NULL, "processes", NULL, "Started Processes", "processes/s", 700, update_every, RRDSET_TYPE_LINE);
 183                         st->isdetail = 1;
 184
 185                         rrddim_add(st, "started", NULL, 1, 1, RRDDIM_INCREMENTAL);
 186                 }
 187                 else rrdset_next(st);
 188
 189                 rrddim_set(st, "started", processes);
 190                 rrdset_done(st);
 191         }
 192
 193         // --------------------------------------------------------------------
 194
 195         if(likely(do_processes)) {
 196                 st = rrdset_find_bytype("system", "processes");
 197                 if(unlikely(!st)) {
 198                         st = rrdset_create("system", "processes", NULL, "processes", NULL, "System Processes", "processes", 600, update_every, RRDSET_TYPE_LINE);
 199
 200                         rrddim_add(st, "running", NULL, 1, 1, RRDDIM_ABSOLUTE);
 201                         rrddim_add(st, "blocked", NULL, -1, 1, RRDDIM_ABSOLUTE);
 202                 }
 203                 else rrdset_next(st);
 204
 205                 rrddim_set(st, "running", running);
 206                 rrddim_set(st, "blocked", blocked);
 207                 rrdset_done(st);
 208         }
 209
 210         return 0;
 211 }