/**
* collectd - src/cpufreq.c
- * Copyright (C) 2005 Peter Holik
+ * Copyright (C) 2005-2007 Peter Holik
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Peter Holik <peter at holik.at>
**/
-#include "cpufreq.h"
+#include "collectd.h"
-/*
- * Originally written by Peter Holik
- */
+#include "common.h"
+#include "plugin.h"
-#if COLLECT_CPUFREQ
#define MODULE_NAME "cpufreq"
-#include "plugin.h"
-#include "common.h"
-
static int num_cpu = 0;
-static char *cpufreq_file = "cpufreq-%s.rrd";
+static int cpufreq_init(void) {
+ int status;
+ char filename[256];
-static char *ds_def[] =
-{
- "DS:value:GAUGE:25:0:U",
- NULL
-};
-static int ds_num = 1;
+ num_cpu = 0;
-#define BUFSIZE 256
+ while (1) {
+ status = ssnprintf(filename, sizeof(filename),
+ "/sys/devices/system/cpu/cpu%d/cpufreq/"
+ "scaling_cur_freq",
+ num_cpu);
+ if ((status < 1) || ((unsigned int)status >= sizeof(filename)))
+ break;
-void cpufreq_init (void)
-{
- int status;
- char filename[BUFSIZE];
+ if (access(filename, R_OK))
+ break;
- num_cpu = 0;
+ num_cpu++;
+ }
- while (1)
- {
- status = snprintf (filename, BUFSIZE, "/sys/devices/system/cpu/cpu%d/cpufreq/cpuinfo_cur_freq", num_cpu);
- if (status < 1 || status >= BUFSIZE)
- break;
+ INFO("cpufreq plugin: Found %d CPU%s", num_cpu, (num_cpu == 1) ? "" : "s");
- if (access(filename, R_OK))
- break;
+ if (num_cpu == 0)
+ plugin_unregister_read("cpufreq");
- num_cpu++;
- }
+ return (0);
+} /* int cpufreq_init */
- syslog (LOG_INFO, MODULE_NAME" found %d cpu(s)", num_cpu);
-}
+static void cpufreq_submit(int cpu_num, double value) {
+ value_t values[1];
+ value_list_t vl = VALUE_LIST_INIT;
-void cpufreq_write (char *host, char *inst, char *val)
-{
- int status;
- char file[BUFSIZE];
+ values[0].gauge = value;
- status = snprintf (file, BUFSIZE, cpufreq_file, inst);
- if (status < 1 || status >= BUFSIZE)
- return;
+ vl.values = values;
+ vl.values_len = 1;
+ sstrncpy(vl.host, hostname_g, sizeof(vl.host));
+ sstrncpy(vl.plugin, "cpufreq", sizeof(vl.plugin));
+ sstrncpy(vl.type, "cpufreq", sizeof(vl.type));
+ ssnprintf(vl.type_instance, sizeof(vl.type_instance), "%i", cpu_num);
- rrd_update_file (host, file, val, ds_def, ds_num);
+ plugin_dispatch_values(&vl);
}
-void cpufreq_submit (int cpu_num, unsigned long long val)
-{
- char buf[BUFSIZE];
- char cpu[16];
-
- if (snprintf (buf, BUFSIZE, "%u:%llu", (unsigned int) curtime, val) >= BUFSIZE)
- return;
- snprintf (cpu, 16, "%i", cpu_num);
-
- plugin_submit (MODULE_NAME, cpu, buf);
-}
-
-void cpufreq_read (void)
-{
- int status;
- unsigned long long val;
- int i = 0;
- FILE *fp;
- char filename[BUFSIZE];
- char buffer[16];
-
- for (i = 0; i < num_cpu; i++)
- {
- status = snprintf (filename, BUFSIZE, "/sys/devices/system/cpu/cpu%d/cpufreq/cpuinfo_cur_freq", i);
- if (status < 1 || status >= BUFSIZE)
- return;
-
- if ((fp = fopen (filename, "r")) == NULL)
- {
- syslog (LOG_WARNING, "cpufreq: fopen: %s", strerror (errno));
- return;
- }
-
- if (fgets (buffer, 16, fp) == NULL)
- {
- syslog (LOG_WARNING, "cpufreq: fgets: %s", strerror (errno));
- return;
- }
-
- if (fclose (fp))
- syslog (LOG_WARNING, "cpufreq: fclose: %s", strerror (errno));
-
- /* You're seeing correctly: The file is reporting kHz values.. */
- val = atoll (buffer) * 1000;
-
- cpufreq_submit (i, val);
- }
+static int cpufreq_read(void) {
+ int status;
+ unsigned long long val;
+ FILE *fp;
+ char filename[256];
+ char buffer[16];
+
+ for (int i = 0; i < num_cpu; i++) {
+ status = ssnprintf(filename, sizeof(filename),
+ "/sys/devices/system/cpu/cpu%d/cpufreq/"
+ "scaling_cur_freq",
+ i);
+ if ((status < 1) || ((unsigned int)status >= sizeof(filename)))
+ return (-1);
+
+ if ((fp = fopen(filename, "r")) == NULL) {
+ char errbuf[1024];
+ WARNING("cpufreq: fopen (%s): %s", filename,
+ sstrerror(errno, errbuf, sizeof(errbuf)));
+ return (-1);
+ }
+
+ if (fgets(buffer, 16, fp) == NULL) {
+ char errbuf[1024];
+ WARNING("cpufreq: fgets: %s", sstrerror(errno, errbuf, sizeof(errbuf)));
+ fclose(fp);
+ return (-1);
+ }
+
+ if (fclose(fp)) {
+ char errbuf[1024];
+ WARNING("cpufreq: fclose: %s", sstrerror(errno, errbuf, sizeof(errbuf)));
+ }
+
+ /* You're seeing correctly: The file is reporting kHz values.. */
+ val = atoll(buffer) * 1000;
+
+ cpufreq_submit(i, val);
+ }
+
+ return (0);
+} /* int cpufreq_read */
+
+void module_register(void) {
+ plugin_register_init("cpufreq", cpufreq_init);
+ plugin_register_read("cpufreq", cpufreq_read);
}
-#undef BUFSIZE
-
-void module_register (void)
-{
- plugin_register (MODULE_NAME, cpufreq_init, cpufreq_read, cpufreq_write);
-}
-
-#undef MODULE_NAME
-#endif /* COLLECT_CPUFREQ */