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#include "common.h"
// linux calculates this once every 5 seconds
#define MIN_LOADAVG_UPDATE_EVERY 5
int do_proc_loadavg(int update_every, unsigned long long dt) {
static procfile *ff = NULL;
static int do_loadavg = -1, do_all_processes = -1;
if(dt) {};
if(!ff) {
char filename[FILENAME_MAX + 1];
snprintfz(filename, FILENAME_MAX, "%s%s", global_host_prefix, "/proc/loadavg");
ff = procfile_open(config_get("plugin:proc:/proc/loadavg", "filename to monitor", filename), " \t,:|/", PROCFILE_FLAG_DEFAULT);
}
if(!ff) return 1;
ff = procfile_readall(ff);
if(!ff) return 0; // we return 0, so that we will retry to open it next time
if(do_loadavg == -1) do_loadavg = config_get_boolean("plugin:proc:/proc/loadavg", "enable load average", 1);
if(do_all_processes == -1) do_all_processes = config_get_boolean("plugin:proc:/proc/loadavg", "enable total processes", 1);
if(procfile_lines(ff) < 1) {
error("/proc/loadavg has no lines.");
return 1;
}
if(procfile_linewords(ff, 0) < 6) {
error("/proc/loadavg has less than 6 words in it.");
return 1;
}
double load1 = strtod(procfile_lineword(ff, 0, 0), NULL);
double load5 = strtod(procfile_lineword(ff, 0, 1), NULL);
double load15 = strtod(procfile_lineword(ff, 0, 2), NULL);
//unsigned long long running_processes = strtoull(procfile_lineword(ff, 0, 3), NULL, 10);
unsigned long long active_processes = strtoull(procfile_lineword(ff, 0, 4), NULL, 10);
//unsigned long long next_pid = strtoull(procfile_lineword(ff, 0, 5), NULL, 10);
RRDSET *st;
// --------------------------------------------------------------------
if(do_loadavg) {
st = rrdset_find_byname("system.load");
if(!st) {
st = rrdset_create("system", "load", NULL, "load", NULL, "System Load Average", "load", 100, (update_every < MIN_LOADAVG_UPDATE_EVERY)?MIN_LOADAVG_UPDATE_EVERY:update_every, RRDSET_TYPE_LINE);
rrddim_add(st, "load1", NULL, 1, 1000, RRDDIM_ABSOLUTE);
rrddim_add(st, "load5", NULL, 1, 1000, RRDDIM_ABSOLUTE);
rrddim_add(st, "load15", NULL, 1, 1000, RRDDIM_ABSOLUTE);
}
else rrdset_next(st);
rrddim_set(st, "load1", load1 * 1000);
rrddim_set(st, "load5", load5 * 1000);
rrddim_set(st, "load15", load15 * 1000);
rrdset_done(st);
}
// --------------------------------------------------------------------
if(do_all_processes) {
st = rrdset_find_byname("system.active_processes");
if(!st) {
st = rrdset_create("system", "active_processes", NULL, "processes", NULL, "System Active Processes", "processes", 750, update_every, RRDSET_TYPE_LINE);
rrddim_add(st, "active", NULL, 1, 1, RRDDIM_ABSOLUTE);
}
else rrdset_next(st);
rrddim_set(st, "active", active_processes);
rrdset_done(st);
}
return 0;
}
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