132 lines
5.1 KiB
C
132 lines
5.1 KiB
C
// SPDX-License-Identifier: GPL-3.0-or-later
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#include "plugin_proc.h"
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#define PLUGIN_PROC_MODULE_LOADAVG_NAME "/proc/loadavg"
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#define CONFIG_SECTION_PLUGIN_PROC_LOADAVG "plugin:" PLUGIN_PROC_CONFIG_NAME ":" PLUGIN_PROC_MODULE_LOADAVG_NAME
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// linux calculates this once every 5 seconds
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#define MIN_LOADAVG_UPDATE_EVERY 5
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int do_proc_loadavg(int update_every, usec_t dt) {
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static procfile *ff = NULL;
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static int do_loadavg = -1, do_all_processes = -1;
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static usec_t next_loadavg_dt = 0;
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if(unlikely(!ff)) {
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char filename[FILENAME_MAX + 1];
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snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/proc/loadavg");
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ff = procfile_open(config_get(CONFIG_SECTION_PLUGIN_PROC_LOADAVG, "filename to monitor", filename), " \t,:|/", PROCFILE_FLAG_DEFAULT);
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if(unlikely(!ff))
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return 1;
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}
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ff = procfile_readall(ff);
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if(unlikely(!ff))
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return 0; // we return 0, so that we will retry to open it next time
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if(unlikely(do_loadavg == -1)) {
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do_loadavg = config_get_boolean(CONFIG_SECTION_PLUGIN_PROC_LOADAVG, "enable load average", 1);
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do_all_processes = config_get_boolean(CONFIG_SECTION_PLUGIN_PROC_LOADAVG, "enable total processes", 1);
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}
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if(unlikely(procfile_lines(ff) < 1)) {
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error("/proc/loadavg has no lines.");
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return 1;
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}
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if(unlikely(procfile_linewords(ff, 0) < 6)) {
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error("/proc/loadavg has less than 6 words in it.");
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return 1;
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}
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double load1 = strtod(procfile_lineword(ff, 0, 0), NULL);
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double load5 = strtod(procfile_lineword(ff, 0, 1), NULL);
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double load15 = strtod(procfile_lineword(ff, 0, 2), NULL);
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//unsigned long long running_processes = str2ull(procfile_lineword(ff, 0, 3));
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unsigned long long active_processes = str2ull(procfile_lineword(ff, 0, 4));
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//get system pid_max
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unsigned long long max_processes = get_system_pid_max();
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//
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//unsigned long long next_pid = str2ull(procfile_lineword(ff, 0, 5));
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// --------------------------------------------------------------------
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if(next_loadavg_dt <= dt) {
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if(likely(do_loadavg)) {
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static RRDSET *load_chart = NULL;
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static RRDDIM *rd_load1 = NULL, *rd_load5 = NULL, *rd_load15 = NULL;
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if(unlikely(!load_chart)) {
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load_chart = rrdset_create_localhost(
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"system"
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, "load"
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, NULL
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, "load"
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, NULL
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, "System Load Average"
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, "load"
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, PLUGIN_PROC_NAME
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, PLUGIN_PROC_MODULE_LOADAVG_NAME
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, NETDATA_CHART_PRIO_SYSTEM_LOAD
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, (update_every < MIN_LOADAVG_UPDATE_EVERY) ? MIN_LOADAVG_UPDATE_EVERY : update_every
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, RRDSET_TYPE_LINE
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);
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rd_load1 = rrddim_add(load_chart, "load1", NULL, 1, 1000, RRD_ALGORITHM_ABSOLUTE);
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rd_load5 = rrddim_add(load_chart, "load5", NULL, 1, 1000, RRD_ALGORITHM_ABSOLUTE);
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rd_load15 = rrddim_add(load_chart, "load15", NULL, 1, 1000, RRD_ALGORITHM_ABSOLUTE);
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}
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else
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rrdset_next(load_chart);
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rrddim_set_by_pointer(load_chart, rd_load1, (collected_number) (load1 * 1000));
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rrddim_set_by_pointer(load_chart, rd_load5, (collected_number) (load5 * 1000));
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rrddim_set_by_pointer(load_chart, rd_load15, (collected_number) (load15 * 1000));
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rrdset_done(load_chart);
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next_loadavg_dt = load_chart->update_every * USEC_PER_SEC;
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}
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else next_loadavg_dt = MIN_LOADAVG_UPDATE_EVERY * USEC_PER_SEC;
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}
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else next_loadavg_dt -= dt;
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// --------------------------------------------------------------------
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if(likely(do_all_processes)) {
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static RRDSET *processes_chart = NULL;
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static RRDDIM *rd_active = NULL;
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static const RRDSETVAR_ACQUIRED *rd_pidmax;
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if(unlikely(!processes_chart)) {
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processes_chart = rrdset_create_localhost(
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"system"
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, "active_processes"
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, NULL
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, "processes"
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, NULL
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, "System Active Processes"
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, "processes"
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, PLUGIN_PROC_NAME
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, PLUGIN_PROC_MODULE_LOADAVG_NAME
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, NETDATA_CHART_PRIO_SYSTEM_ACTIVE_PROCESSES
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, update_every
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, RRDSET_TYPE_LINE
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);
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rd_active = rrddim_add(processes_chart, "active", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
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rd_pidmax = rrdsetvar_custom_chart_variable_add_and_acquire(processes_chart, "pidmax");
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}
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else rrdset_next(processes_chart);
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rrddim_set_by_pointer(processes_chart, rd_active, active_processes);
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rrdsetvar_custom_chart_variable_set(processes_chart, rd_pidmax, max_processes);
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rrdset_done(processes_chart);
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}
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return 0;
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}
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