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-rw-r--r--collectors/proc.plugin/proc_loadavg.c124
1 files changed, 124 insertions, 0 deletions
diff --git a/collectors/proc.plugin/proc_loadavg.c b/collectors/proc.plugin/proc_loadavg.c
new file mode 100644
index 0000000..db95b16
--- /dev/null
+++ b/collectors/proc.plugin/proc_loadavg.c
@@ -0,0 +1,124 @@
+// 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;
+}