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) {
7 static procfile *ff = NULL;
8 static int do_loadavg = -1, do_all_processes = -1;
9 static usec_t next_loadavg_dt = 0;
10 static RRDSET *load_chart = NULL, *processes_chart = NULL;
13 char filename[FILENAME_MAX + 1];
14 snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/proc/loadavg");
16 ff = procfile_open(config_get("plugin:proc:/proc/loadavg", "filename to monitor", filename), " \t,:|/", PROCFILE_FLAG_DEFAULT);
21 ff = procfile_readall(ff);
23 return 0; // we return 0, so that we will retry to open it next time
25 if(unlikely(do_loadavg == -1)) {
26 do_loadavg = config_get_boolean("plugin:proc:/proc/loadavg", "enable load average", 1);
27 do_all_processes = config_get_boolean("plugin:proc:/proc/loadavg", "enable total processes", 1);
30 if(unlikely(procfile_lines(ff) < 1)) {
31 error("/proc/loadavg has no lines.");
34 if(unlikely(procfile_linewords(ff, 0) < 6)) {
35 error("/proc/loadavg has less than 6 words in it.");
39 double load1 = strtod(procfile_lineword(ff, 0, 0), NULL);
40 double load5 = strtod(procfile_lineword(ff, 0, 1), NULL);
41 double load15 = strtod(procfile_lineword(ff, 0, 2), NULL);
43 //unsigned long long running_processes = str2ull(procfile_lineword(ff, 0, 3));
44 unsigned long long active_processes = str2ull(procfile_lineword(ff, 0, 4));
45 //unsigned long long next_pid = str2ull(procfile_lineword(ff, 0, 5));
48 // --------------------------------------------------------------------
50 if(next_loadavg_dt <= dt) {
51 if(likely(do_loadavg)) {
52 if(unlikely(!load_chart)) {
53 load_chart = rrdset_find_byname_localhost("system.load");
54 if(unlikely(!load_chart)) {
55 load_chart = rrdset_create_localhost("system", "load", NULL, "load", NULL, "System Load Average"
56 , "load", 100, (update_every < MIN_LOADAVG_UPDATE_EVERY)
57 ? MIN_LOADAVG_UPDATE_EVERY : update_every
59 rrddim_add(load_chart, "load1", NULL, 1, 1000, RRD_ALGORITHM_ABSOLUTE);
60 rrddim_add(load_chart, "load5", NULL, 1, 1000, RRD_ALGORITHM_ABSOLUTE);
61 rrddim_add(load_chart, "load15", NULL, 1, 1000, RRD_ALGORITHM_ABSOLUTE);
65 rrdset_next(load_chart);
67 rrddim_set(load_chart, "load1", (collected_number) (load1 * 1000));
68 rrddim_set(load_chart, "load5", (collected_number) (load5 * 1000));
69 rrddim_set(load_chart, "load15", (collected_number) (load15 * 1000));
70 rrdset_done(load_chart);
73 next_loadavg_dt = load_chart->update_every * USEC_PER_SEC;
75 else next_loadavg_dt -= dt;
77 // --------------------------------------------------------------------
79 if(likely(do_all_processes)) {
80 if(unlikely(!processes_chart)) {
81 processes_chart = rrdset_find_byname_localhost("system.active_processes");
82 if(unlikely(!processes_chart)) {
83 processes_chart = rrdset_create_localhost("system", "active_processes", NULL, "processes", NULL
84 , "System Active Processes", "processes", 750, update_every
86 rrddim_add(processes_chart, "active", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
89 else rrdset_next(processes_chart);
91 rrddim_set(processes_chart, "active", active_processes);
92 rrdset_done(processes_chart);