3 // linux calculates this once every 5 seconds
4 #define MIN_LOADAVG_UPDATE_EVERY 5
6 int do_proc_loadavg(int update_every, usec_t dt) {
9 static procfile *ff = NULL;
10 static int do_loadavg = -1, do_all_processes = -1;
11 static usec_t last_loadavg_usec = 0;
12 static RRDSET *load_chart = NULL, *processes_chart = NULL;
15 char filename[FILENAME_MAX + 1];
16 snprintfz(filename, FILENAME_MAX, "%s%s", global_host_prefix, "/proc/loadavg");
17 ff = procfile_open(config_get("plugin:proc:/proc/loadavg", "filename to monitor", filename), " \t,:|/", PROCFILE_FLAG_DEFAULT);
22 ff = procfile_readall(ff);
24 return 0; // we return 0, so that we will retry to open it next time
26 if(unlikely(do_loadavg == -1)) {
27 do_loadavg = config_get_boolean("plugin:proc:/proc/loadavg", "enable load average", 1);
28 do_all_processes = config_get_boolean("plugin:proc:/proc/loadavg", "enable total processes", 1);
31 if(unlikely(procfile_lines(ff) < 1)) {
32 error("/proc/loadavg has no lines.");
35 if(unlikely(procfile_linewords(ff, 0) < 6)) {
36 error("/proc/loadavg has less than 6 words in it.");
40 double load1 = strtod(procfile_lineword(ff, 0, 0), NULL);
41 double load5 = strtod(procfile_lineword(ff, 0, 1), NULL);
42 double load15 = strtod(procfile_lineword(ff, 0, 2), NULL);
44 //unsigned long long running_processes = strtoull(procfile_lineword(ff, 0, 3), NULL, 10);
45 unsigned long long active_processes = strtoull(procfile_lineword(ff, 0, 4), NULL, 10);
46 //unsigned long long next_pid = strtoull(procfile_lineword(ff, 0, 5), NULL, 10);
49 // --------------------------------------------------------------------
51 if(last_loadavg_usec <= dt) {
52 if(likely(do_loadavg)) {
53 if(unlikely(!load_chart)) {
54 load_chart = rrdset_find_byname("system.load");
55 if(unlikely(!load_chart)) {
56 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);
57 rrddim_add(load_chart, "load1", NULL, 1, 1000, RRDDIM_ABSOLUTE);
58 rrddim_add(load_chart, "load5", NULL, 1, 1000, RRDDIM_ABSOLUTE);
59 rrddim_add(load_chart, "load15", NULL, 1, 1000, RRDDIM_ABSOLUTE);
63 rrdset_next(load_chart);
65 rrddim_set(load_chart, "load1", (collected_number) (load1 * 1000));
66 rrddim_set(load_chart, "load5", (collected_number) (load5 * 1000));
67 rrddim_set(load_chart, "load15", (collected_number) (load15 * 1000));
68 rrdset_done(load_chart);
71 last_loadavg_usec = load_chart->update_every * USEC_PER_SEC;
73 else last_loadavg_usec -= dt;
75 // --------------------------------------------------------------------
77 if(likely(do_all_processes)) {
78 if(unlikely(!processes_chart)) {
79 processes_chart = rrdset_find_byname("system.active_processes");
80 if(unlikely(!processes_chart)) {
81 processes_chart = rrdset_create("system", "active_processes", NULL, "processes", NULL, "System Active Processes", "processes", 750, update_every, RRDSET_TYPE_LINE);
82 rrddim_add(processes_chart, "active", NULL, 1, 1, RRDDIM_ABSOLUTE);
85 else rrdset_next(processes_chart);
87 rrddim_set(processes_chart, "active", active_processes);
88 rrdset_done(processes_chart);