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) {
  30                 char filename[FILENAME_MAX + 1];
  31                 snprintf(filename, FILENAME_MAX, "%s%s", global_host_prefix, "/proc/stat");
  32                 ff = procfile_open(config_get("plugin:proc:/proc/stat", "filename to monitor", filename), " \t:", PROCFILE_FLAG_DEFAULT);
  33         }
  34         if(!ff) return 1;
  35
  36         ff = procfile_readall(ff);
  37         if(!ff) return 0; // we return 0, so that we will retry to open it next time
  38
  39         uint32_t lines = procfile_lines(ff), l;
  40         uint32_t words;
  41
  42         unsigned long long processes = 0, running = 0 , blocked = 0;
  43         RRDSET *st;
  44
  45         for(l = 0; l < lines ;l++) {
  46                 if(strncmp(procfile_lineword(ff, l, 0), "cpu", 3) == 0) {
  47                         words = procfile_linewords(ff, l);
  48                         if(words < 10) {
  49                                 error("Cannot read /proc/stat cpu line. Expected 10 params, read %d.", 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                      = procfile_lineword(ff, l, 0);
  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                         guest           = strtoull(procfile_lineword(ff, l, 9), NULL, 10);
  66                         if(words >= 11) guest_nice      = strtoull(procfile_lineword(ff, l, 10), NULL, 10);
  67
  68                         char *title = "Core utilization";
  69                         char *type = RRD_TYPE_STAT;
  70                         long priority = 1000;
  71                         int isthistotal = 0;
  72                         if(strcmp(id, "cpu") == 0) {
  73                                 isthistotal = 1;
  74                                 title = "Total CPU utilization";
  75                                 type = "system";
  76                                 priority = 100;
  77                         }
  78
  79                         if((isthistotal && do_cpu) || (!isthistotal && do_cpu_cores)) {
  80                                 st = rrdset_find_bytype(type, id);
  81                                 if(!st) {
  82                                         st = rrdset_create(type, id, NULL, "cpu", title, "percentage", priority, update_every, RRDSET_TYPE_STACKED);
  83
  84                                         long multiplier = 1;
  85                                         long divisor = 1; // sysconf(_SC_CLK_TCK);
  86
  87                                         rrddim_add(st, "guest_nice", NULL, multiplier, divisor, RRDDIM_PCENT_OVER_DIFF_TOTAL);
  88                                         rrddim_add(st, "guest", NULL, multiplier, divisor, RRDDIM_PCENT_OVER_DIFF_TOTAL);
  89                                         rrddim_add(st, "steal", NULL, multiplier, divisor, RRDDIM_PCENT_OVER_DIFF_TOTAL);
  90                                         rrddim_add(st, "softirq", NULL, multiplier, divisor, RRDDIM_PCENT_OVER_DIFF_TOTAL);
  91                                         rrddim_add(st, "irq", NULL, multiplier, divisor, RRDDIM_PCENT_OVER_DIFF_TOTAL);
  92                                         rrddim_add(st, "user", NULL, multiplier, divisor, RRDDIM_PCENT_OVER_DIFF_TOTAL);
  93                                         rrddim_add(st, "system", NULL, multiplier, divisor, RRDDIM_PCENT_OVER_DIFF_TOTAL);
  94                                         rrddim_add(st, "nice", NULL, multiplier, divisor, RRDDIM_PCENT_OVER_DIFF_TOTAL);
  95                                         rrddim_add(st, "iowait", NULL, multiplier, divisor, RRDDIM_PCENT_OVER_DIFF_TOTAL);
  96
  97                                         rrddim_add(st, "idle", NULL, multiplier, divisor, RRDDIM_PCENT_OVER_DIFF_TOTAL);
  98                                         rrddim_hide(st, "idle");
  99                                 }
 100                                 else rrdset_next(st);
 101
 102                                 rrddim_set(st, "user", user);
 103                                 rrddim_set(st, "nice", nice);
 104                                 rrddim_set(st, "system", system);
 105                                 rrddim_set(st, "idle", idle);
 106                                 rrddim_set(st, "iowait", iowait);
 107                                 rrddim_set(st, "irq", irq);
 108                                 rrddim_set(st, "softirq", softirq);
 109                                 rrddim_set(st, "steal", steal);
 110                                 rrddim_set(st, "guest", guest);
 111                                 rrddim_set(st, "guest_nice", guest_nice);
 112                                 rrdset_done(st);
 113                         }
 114                 }
 115                 else if(strcmp(procfile_lineword(ff, l, 0), "intr") == 0) {
 116                         unsigned long long value = strtoull(procfile_lineword(ff, l, 1), NULL, 10);
 117
 118                         // --------------------------------------------------------------------
 119
 120                         if(do_interrupts) {
 121                                 st = rrdset_find_bytype("system", "intr");
 122                                 if(!st) {
 123                                         st = rrdset_create("system", "intr", NULL, "cpu", "CPU Interrupts", "interrupts/s", 900, update_every, RRDSET_TYPE_LINE);
 124                                         st->isdetail = 1;
 125
 126                                         rrddim_add(st, "interrupts", NULL, 1, 1 * update_every, RRDDIM_INCREMENTAL);
 127                                 }
 128                                 else rrdset_next(st);
 129
 130                                 rrddim_set(st, "interrupts", value);
 131                                 rrdset_done(st);
 132                         }
 133                 }
 134                 else if(strcmp(procfile_lineword(ff, l, 0), "ctxt") == 0) {
 135                         unsigned long long value = strtoull(procfile_lineword(ff, l, 1), NULL, 10);
 136
 137                         // --------------------------------------------------------------------
 138
 139                         if(do_context) {
 140                                 st = rrdset_find_bytype("system", "ctxt");
 141                                 if(!st) {
 142                                         st = rrdset_create("system", "ctxt", NULL, "cpu", "CPU Context Switches", "context switches/s", 800, update_every, RRDSET_TYPE_LINE);
 143
 144                                         rrddim_add(st, "switches", NULL, 1, 1 * update_every, RRDDIM_INCREMENTAL);
 145                                 }
 146                                 else rrdset_next(st);
 147
 148                                 rrddim_set(st, "switches", value);
 149                                 rrdset_done(st);
 150                         }
 151                 }
 152                 else if(!processes && strcmp(procfile_lineword(ff, l, 0), "processes") == 0) {
 153                         processes = strtoull(procfile_lineword(ff, l, 1), NULL, 10);
 154                 }
 155                 else if(!running && strcmp(procfile_lineword(ff, l, 0), "procs_running") == 0) {
 156                         running = strtoull(procfile_lineword(ff, l, 1), NULL, 10);
 157                 }
 158                 else if(!blocked && strcmp(procfile_lineword(ff, l, 0), "procs_blocked") == 0) {
 159                         blocked = strtoull(procfile_lineword(ff, l, 1), NULL, 10);
 160                 }
 161         }
 162
 163         // --------------------------------------------------------------------
 164
 165         if(do_forks) {
 166                 st = rrdset_find_bytype("system", "forks");
 167                 if(!st) {
 168                         st = rrdset_create("system", "forks", NULL, "cpu", "New Processes", "processes/s", 700, update_every, RRDSET_TYPE_LINE);
 169                         st->isdetail = 1;
 170
 171                         rrddim_add(st, "started", NULL, 1, 1 * update_every, RRDDIM_INCREMENTAL);
 172                 }
 173                 else rrdset_next(st);
 174
 175                 rrddim_set(st, "started", processes);
 176                 rrdset_done(st);
 177         }
 178
 179         // --------------------------------------------------------------------
 180
 181         if(do_processes) {
 182                 st = rrdset_find_bytype("system", "processes");
 183                 if(!st) {
 184                         st = rrdset_create("system", "processes", NULL, "cpu", "Processes", "processes", 600, update_every, RRDSET_TYPE_LINE);
 185
 186                         rrddim_add(st, "running", NULL, 1, 1, RRDDIM_ABSOLUTE);
 187                         rrddim_add(st, "blocked", NULL, -1, 1, RRDDIM_ABSOLUTE);
 188                 }
 189                 else rrdset_next(st);
 190
 191                 rrddim_set(st, "running", running);
 192                 rrddim_set(st, "blocked", blocked);
 193                 rrdset_done(st);
 194         }
 195
 196         return 0;
 197 }