src/proc_stat.c

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