/**
* 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
#define MODULE_NAME "cpufreq"
-static char *cpufreq_file = "cpufreq-%s.rrd";
+#if defined(KERNEL_LINUX)
+# define CPUFREQ_HAVE_READ 1
+#else
+# define CPUFREQ_HAVE_READ 0
+#endif
+
+static data_source_t data_source[1] =
+{
+ {"value", DS_TYPE_GAUGE, 0, NAN}
+};
-static char *ds_def[] =
+static data_set_t data_set =
{
- "DS:value:GAUGE:25:0:U",
- NULL
+ "cpufreq", 1, data_source
};
-static int ds_num = 1;
+#if CPUFREQ_HAVE_READ
#ifdef KERNEL_LINUX
static int num_cpu = 0;
#endif
-#define BUFSIZE 256
-
-static void cpufreq_init (void)
+static int cpufreq_init (void)
{
#ifdef KERNEL_LINUX
int status;
- char filename[BUFSIZE];
+ char filename[256];
num_cpu = 0;
while (1)
{
- status = snprintf (filename, BUFSIZE, "/sys/devices/system/cpu/cpu%d/cpufreq/cpuinfo_cur_freq", num_cpu);
- if (status < 1 || status >= BUFSIZE)
+ status = snprintf (filename, sizeof (filename),
+ "/sys/devices/system/cpu/cpu%d/cpufreq/"
+ "scaling_cur_freq", num_cpu);
+ if (status < 1 || status >= sizeof (filename))
break;
- if (access(filename, R_OK))
+ if (access (filename, R_OK))
break;
num_cpu++;
}
- syslog (LOG_INFO, MODULE_NAME" found %d cpu(s)", num_cpu);
+ syslog (LOG_INFO, "cpufreq plugin: Found %d CPU%s", num_cpu,
+ (num_cpu == 1) ? "" : "s");
+
+ if (num_cpu == 0)
+ plugin_unregister_read ("cpufreq");
#endif /* defined(KERNEL_LINUX) */
- return;
-}
+ return (0);
+} /* int cpufreq_init */
-static void cpufreq_write (char *host, char *inst, char *val)
+static void cpufreq_submit (int cpu_num, double value)
{
- int status;
- char file[BUFSIZE];
+ value_t values[1];
+ value_list_t vl = VALUE_LIST_INIT;
- status = snprintf (file, BUFSIZE, cpufreq_file, inst);
- if (status < 1 || status >= BUFSIZE)
- return;
+ values[0].gauge = value;
- rrd_update_file (host, file, val, ds_def, ds_num);
-}
-
-static 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);
+ vl.values = values;
+ vl.values_len = 1;
+ vl.time = time (NULL);
+ strcpy (vl.host, hostname);
+ strcpy (vl.plugin, "cpufreq");
+ snprintf (vl.type_instance, sizeof (vl.type_instance),
+ "%i", cpu_num);
- plugin_submit (MODULE_NAME, cpu, buf);
+ plugin_dispatch_values ("cpufreq", &vl);
}
-static void cpufreq_read (void)
+static int cpufreq_read (void)
{
#ifdef KERNEL_LINUX
int status;
unsigned long long val;
int i = 0;
FILE *fp;
- char filename[BUFSIZE];
+ char filename[256];
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;
+ status = snprintf (filename, sizeof (filename),
+ "/sys/devices/system/cpu/cpu%d/cpufreq/"
+ "scaling_cur_freq", i);
+ if (status < 1 || status >= sizeof (filename))
+ return (-1);
if ((fp = fopen (filename, "r")) == NULL)
{
syslog (LOG_WARNING, "cpufreq: fopen: %s", strerror (errno));
- return;
+ return (-1);
}
if (fgets (buffer, 16, fp) == NULL)
{
syslog (LOG_WARNING, "cpufreq: fgets: %s", strerror (errno));
- return;
+ fclose (fp);
+ return (-1);
}
if (fclose (fp))
}
#endif /* defined(KERNEL_LINUX) */
- return;
-}
+ return (0);
+} /* int cpufreq_read */
+#endif /* CPUFREQ_HAVE_READ */
#undef BUFSIZE
void module_register (void)
{
- plugin_register (MODULE_NAME, cpufreq_init, cpufreq_read, cpufreq_write);
-}
+ plugin_register_data_set (&data_set);
-#undef MODULE_NAME
+#if CPUFREQ_HAVE_READ
+ plugin_register_init ("cpufreq", cpufreq_init);
+ plugin_register_read ("cpufreq", cpufreq_read);
+#endif /* CPUFREQ_HAVE_READ */
+}