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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, usec_t dt) {
static procfile *ff = NULL;
static int do_loadavg = -1, do_all_processes = -1;
static usec_t last_loadavg_usec = 0;
static RRDSET *load_chart = NULL, *processes_chart = NULL;
if(unlikely(!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(unlikely(!ff))
return 1;
}
ff = procfile_readall(ff);
if(unlikely(!ff))
return 0; // we return 0, so that we will retry to open it next time
if(unlikely(do_loadavg == -1)) {
do_loadavg = config_get_boolean("plugin:proc:/proc/loadavg", "enable load average", 1);
do_all_processes = config_get_boolean("plugin:proc:/proc/loadavg", "enable total processes", 1);
}
if(unlikely(procfile_lines(ff) < 1)) {
error("/proc/loadavg has no lines.");
return 1;
}
if(unlikely(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 = str2ull(procfile_lineword(ff, 0, 3));
unsigned long long active_processes = str2ull(procfile_lineword(ff, 0, 4));
//unsigned long long next_pid = str2ull(procfile_lineword(ff, 0, 5));
// --------------------------------------------------------------------
if(last_loadavg_usec <= dt) {
if(likely(do_loadavg)) {
if(unlikely(!load_chart)) {
load_chart = rrdset_find_byname("system.load");
if(unlikely(!load_chart)) {
load_chart = 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(load_chart, "load1", NULL, 1, 1000, RRDDIM_ABSOLUTE);
rrddim_add(load_chart, "load5", NULL, 1, 1000, RRDDIM_ABSOLUTE);
rrddim_add(load_chart, "load15", NULL, 1, 1000, RRDDIM_ABSOLUTE);
}
}
else
rrdset_next(load_chart);
rrddim_set(load_chart, "load1", (collected_number) (load1 * 1000));
rrddim_set(load_chart, "load5", (collected_number) (load5 * 1000));
rrddim_set(load_chart, "load15", (collected_number) (load15 * 1000));
rrdset_done(load_chart);
}
last_loadavg_usec = load_chart->update_every * USEC_PER_SEC;
}
else last_loadavg_usec -= dt;
// --------------------------------------------------------------------
if(likely(do_all_processes)) {
if(unlikely(!processes_chart)) {
processes_chart = rrdset_find_byname("system.active_processes");
if(unlikely(!processes_chart)) {
processes_chart = rrdset_create("system", "active_processes", NULL, "processes", NULL, "System Active Processes", "processes", 750, update_every, RRDSET_TYPE_LINE);
rrddim_add(processes_chart, "active", NULL, 1, 1, RRDDIM_ABSOLUTE);
}
}
else rrdset_next(processes_chart);
rrddim_set(processes_chart, "active", active_processes);
rrdset_done(processes_chart);
}
return 0;
}
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