src/proc_stat.c

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