src/proc_stat.c

   1 #include <inttypes.h>
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <string.h>
   5
   6 #include "common.h"
   7 #include "log.h"
   8 #include "config.h"
   9 #include "procfile.h"
  10 #include "rrd.h"
  11 #include "plugin_proc.h"
  12
  13 #define RRD_TYPE_STAT                           "cpu"
  14 #define RRD_TYPE_STAT_LEN                       strlen(RRD_TYPE_STAT)
  15
  16 int do_proc_stat(int update_every, unsigned long long dt) {
  17         static procfile *ff = NULL;
  18         static int do_cpu = -1, do_cpu_cores = -1, do_interrupts = -1, do_context = -1, do_forks = -1, do_processes = -1;
  19
  20         if(do_cpu == -1)                do_cpu                  = config_get_boolean("plugin:proc:/proc/stat", "cpu utilization", 1);
  21         if(do_cpu_cores == -1)  do_cpu_cores    = config_get_boolean("plugin:proc:/proc/stat", "per cpu core utilization", 1);
  22         if(do_interrupts == -1) do_interrupts   = config_get_boolean("plugin:proc:/proc/stat", "cpu interrupts", 1);
  23         if(do_context == -1)    do_context              = config_get_boolean("plugin:proc:/proc/stat", "context switches", 1);
  24         if(do_forks == -1)              do_forks                = config_get_boolean("plugin:proc:/proc/stat", "processes started", 1);
  25         if(do_processes == -1)  do_processes    = config_get_boolean("plugin:proc:/proc/stat", "processes running", 1);
  26
  27         if(dt) {};
  28
  29         if(!ff) ff = procfile_open(config_get("plugin:proc:/proc/stat", "filename to monitor", "/proc/stat"), " \t:", PROCFILE_FLAG_DEFAULT);
  30         if(!ff) return 1;
  31
  32         ff = procfile_readall(ff);
  33         if(!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                 if(strncmp(procfile_lineword(ff, l, 0), "cpu", 3) == 0) {
  43                         words = procfile_linewords(ff, l);
  44                         if(words < 10) {
  45                                 error("Cannot read /proc/stat cpu line. Expected 10 params, read %d.", words);
  46                                 continue;
  47                         }
  48
  49                         char *id;
  50                         unsigned long long user = 0, nice = 0, system = 0, idle = 0, iowait = 0, irq = 0, softirq = 0, steal = 0, guest = 0, guest_nice = 0;
  51
  52                         id                      = procfile_lineword(ff, l, 0);
  53                         user            = strtoull(procfile_lineword(ff, l, 1), NULL, 10);
  54                         nice            = strtoull(procfile_lineword(ff, l, 2), NULL, 10);
  55                         system          = strtoull(procfile_lineword(ff, l, 3), NULL, 10);
  56                         idle            = strtoull(procfile_lineword(ff, l, 4), NULL, 10);
  57                         iowait          = strtoull(procfile_lineword(ff, l, 5), NULL, 10);
  58                         irq                     = strtoull(procfile_lineword(ff, l, 6), NULL, 10);
  59                         softirq         = strtoull(procfile_lineword(ff, l, 7), NULL, 10);
  60                         steal           = strtoull(procfile_lineword(ff, l, 8), NULL, 10);
  61                         guest           = strtoull(procfile_lineword(ff, l, 9), NULL, 10);
  62                         if(words >= 11) guest_nice      = strtoull(procfile_lineword(ff, l, 10), NULL, 10);
  63
  64                         char *title = "Core utilization";
  65                         char *type = RRD_TYPE_STAT;
  66                         long priority = 1000;
  67                         int isthistotal = 0;
  68                         if(strcmp(id, "cpu") == 0) {
  69                                 isthistotal = 1;
  70                                 title = "Total CPU utilization";
  71                                 type = "system";
  72                                 priority = 100;
  73                         }
  74
  75                         if((isthistotal && do_cpu) || (!isthistotal && do_cpu_cores)) {
  76                                 st = rrdset_find_bytype(type, id);
  77                                 if(!st) {
  78                                         st = rrdset_create(type, id, NULL, "cpu", title, "percentage", priority, update_every, RRDSET_TYPE_STACKED);
  79
  80                                         long multiplier = 1;
  81                                         long divisor = 1; // sysconf(_SC_CLK_TCK);
  82
  83                                         rrddim_add(st, "guest_nice", NULL, multiplier, divisor, RRDDIM_PCENT_OVER_DIFF_TOTAL);
  84                                         rrddim_add(st, "guest", NULL, multiplier, divisor, RRDDIM_PCENT_OVER_DIFF_TOTAL);
  85                                         rrddim_add(st, "steal", NULL, multiplier, divisor, RRDDIM_PCENT_OVER_DIFF_TOTAL);
  86                                         rrddim_add(st, "softirq", NULL, multiplier, divisor, RRDDIM_PCENT_OVER_DIFF_TOTAL);
  87                                         rrddim_add(st, "irq", NULL, multiplier, divisor, RRDDIM_PCENT_OVER_DIFF_TOTAL);
  88                                         rrddim_add(st, "user", NULL, multiplier, divisor, RRDDIM_PCENT_OVER_DIFF_TOTAL);
  89                                         rrddim_add(st, "system", NULL, multiplier, divisor, RRDDIM_PCENT_OVER_DIFF_TOTAL);
  90                                         rrddim_add(st, "nice", NULL, multiplier, divisor, RRDDIM_PCENT_OVER_DIFF_TOTAL);
  91                                         rrddim_add(st, "iowait", NULL, multiplier, divisor, RRDDIM_PCENT_OVER_DIFF_TOTAL);
  92
  93                                         rrddim_add(st, "idle", NULL, multiplier, divisor, RRDDIM_PCENT_OVER_DIFF_TOTAL);
  94                                         rrddim_hide(st, "idle");
  95                                 }
  96                                 else rrdset_next(st);
  97
  98                                 rrddim_set(st, "user", user);
  99                                 rrddim_set(st, "nice", nice);
 100                                 rrddim_set(st, "system", system);
 101                                 rrddim_set(st, "idle", idle);
 102                                 rrddim_set(st, "iowait", iowait);
 103                                 rrddim_set(st, "irq", irq);
 104                                 rrddim_set(st, "softirq", softirq);
 105                                 rrddim_set(st, "steal", steal);
 106                                 rrddim_set(st, "guest", guest);
 107                                 rrddim_set(st, "guest_nice", guest_nice);
 108                                 rrdset_done(st);
 109                         }
 110                 }
 111                 else if(strcmp(procfile_lineword(ff, l, 0), "intr") == 0) {
 112                         unsigned long long value = strtoull(procfile_lineword(ff, l, 1), NULL, 10);
 113
 114                         // --------------------------------------------------------------------
 115
 116                         if(do_interrupts) {
 117                                 st = rrdset_find_bytype("system", "intr");
 118                                 if(!st) {
 119                                         st = rrdset_create("system", "intr", NULL, "cpu", "CPU Interrupts", "interrupts/s", 900, update_every, RRDSET_TYPE_LINE);
 120                                         st->isdetail = 1;
 121
 122                                         rrddim_add(st, "interrupts", NULL, 1, 1 * update_every, RRDDIM_INCREMENTAL);
 123                                 }
 124                                 else rrdset_next(st);
 125
 126                                 rrddim_set(st, "interrupts", value);
 127                                 rrdset_done(st);
 128                         }
 129                 }
 130                 else if(strcmp(procfile_lineword(ff, l, 0), "ctxt") == 0) {
 131                         unsigned long long value = strtoull(procfile_lineword(ff, l, 1), NULL, 10);
 132
 133                         // --------------------------------------------------------------------
 134
 135                         if(do_context) {
 136                                 st = rrdset_find_bytype("system", "ctxt");
 137                                 if(!st) {
 138                                         st = rrdset_create("system", "ctxt", NULL, "cpu", "CPU Context Switches", "context switches/s", 800, update_every, RRDSET_TYPE_LINE);
 139
 140                                         rrddim_add(st, "switches", NULL, 1, 1 * update_every, RRDDIM_INCREMENTAL);
 141                                 }
 142                                 else rrdset_next(st);
 143
 144                                 rrddim_set(st, "switches", value);
 145                                 rrdset_done(st);
 146                         }
 147                 }
 148                 else if(!processes && strcmp(procfile_lineword(ff, l, 0), "processes") == 0) {
 149                         processes = strtoull(procfile_lineword(ff, l, 1), NULL, 10);
 150                 }
 151                 else if(!running && strcmp(procfile_lineword(ff, l, 0), "procs_running") == 0) {
 152                         running = strtoull(procfile_lineword(ff, l, 1), NULL, 10);
 153                 }
 154                 else if(!blocked && strcmp(procfile_lineword(ff, l, 0), "procs_blocked") == 0) {
 155                         blocked = strtoull(procfile_lineword(ff, l, 1), NULL, 10);
 156                 }
 157         }
 158
 159         // --------------------------------------------------------------------
 160
 161         if(do_forks) {
 162                 st = rrdset_find_bytype("system", "forks");
 163                 if(!st) {
 164                         st = rrdset_create("system", "forks", NULL, "cpu", "New Processes", "processes/s", 700, update_every, RRDSET_TYPE_LINE);
 165                         st->isdetail = 1;
 166
 167                         rrddim_add(st, "started", NULL, 1, 1 * update_every, RRDDIM_INCREMENTAL);
 168                 }
 169                 else rrdset_next(st);
 170
 171                 rrddim_set(st, "started", processes);
 172                 rrdset_done(st);
 173         }
 174
 175         // --------------------------------------------------------------------
 176
 177         if(do_processes) {
 178                 st = rrdset_find_bytype("system", "processes");
 179                 if(!st) {
 180                         st = rrdset_create("system", "processes", NULL, "cpu", "Processes", "processes", 600, update_every, RRDSET_TYPE_LINE);
 181
 182                         rrddim_add(st, "running", NULL, 1, 1, RRDDIM_ABSOLUTE);
 183                         rrddim_add(st, "blocked", NULL, -1, 1, RRDDIM_ABSOLUTE);
 184                 }
 185                 else rrdset_next(st);
 186
 187                 rrddim_set(st, "running", running);
 188                 rrddim_set(st, "blocked", blocked);
 189                 rrdset_done(st);
 190         }
 191
 192         return 0;
 193 }