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// SPDX-License-Identifier: GPL-3.0-or-later
#include "plugin_proc.h"
#define PLUGIN_PROC_MODULE_LOADAVG_NAME "/proc/loadavg"
#define CONFIG_SECTION_PLUGIN_PROC_LOADAVG "plugin:" PLUGIN_PROC_CONFIG_NAME ":" PLUGIN_PROC_MODULE_LOADAVG_NAME
// 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 next_loadavg_dt = 0;
if(unlikely(!ff)) {
char filename[FILENAME_MAX + 1];
snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/proc/loadavg");
ff = procfile_open(config_get(CONFIG_SECTION_PLUGIN_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(CONFIG_SECTION_PLUGIN_PROC_LOADAVG, "enable load average", 1);
do_all_processes = config_get_boolean(CONFIG_SECTION_PLUGIN_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(next_loadavg_dt <= dt) {
if(likely(do_loadavg)) {
static RRDSET *load_chart = NULL;
static RRDDIM *rd_load1 = NULL, *rd_load5 = NULL, *rd_load15 = NULL;
if(unlikely(!load_chart)) {
load_chart = rrdset_create_localhost(
"system"
, "load"
, NULL
, "load"
, NULL
, "System Load Average"
, "load"
, PLUGIN_PROC_NAME
, PLUGIN_PROC_MODULE_LOADAVG_NAME
, NETDATA_CHART_PRIO_SYSTEM_LOAD
, (update_every < MIN_LOADAVG_UPDATE_EVERY) ? MIN_LOADAVG_UPDATE_EVERY : update_every
, RRDSET_TYPE_LINE
);
rd_load1 = rrddim_add(load_chart, "load1", NULL, 1, 1000, RRD_ALGORITHM_ABSOLUTE);
rd_load5 = rrddim_add(load_chart, "load5", NULL, 1, 1000, RRD_ALGORITHM_ABSOLUTE);
rd_load15 = rrddim_add(load_chart, "load15", NULL, 1, 1000, RRD_ALGORITHM_ABSOLUTE);
}
else
rrdset_next(load_chart);
rrddim_set_by_pointer(load_chart, rd_load1, (collected_number) (load1 * 1000));
rrddim_set_by_pointer(load_chart, rd_load5, (collected_number) (load5 * 1000));
rrddim_set_by_pointer(load_chart, rd_load15, (collected_number) (load15 * 1000));
rrdset_done(load_chart);
next_loadavg_dt = load_chart->update_every * USEC_PER_SEC;
}
else next_loadavg_dt = MIN_LOADAVG_UPDATE_EVERY * USEC_PER_SEC;
}
else next_loadavg_dt -= dt;
// --------------------------------------------------------------------
if(likely(do_all_processes)) {
static RRDSET *processes_chart = NULL;
static RRDDIM *rd_active = NULL;
if(unlikely(!processes_chart)) {
processes_chart = rrdset_create_localhost(
"system"
, "active_processes"
, NULL
, "processes"
, NULL
, "System Active Processes"
, "processes"
, PLUGIN_PROC_NAME
, PLUGIN_PROC_MODULE_LOADAVG_NAME
, NETDATA_CHART_PRIO_SYSTEM_ACTIVE_PROCESSES
, update_every
, RRDSET_TYPE_LINE
);
rd_active = rrddim_add(processes_chart, "active", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
}
else rrdset_next(processes_chart);
rrddim_set_by_pointer(processes_chart, rd_active, active_processes);
rrdset_done(processes_chart);
}
return 0;
}
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