**/
#include "collectd.h"
-#include "common.h"
-#include "plugin.h"
-#define MODULE_NAME "cpufreq"
+#include "plugin.h"
+#include "utils/common/common.h"
+
+#if KERNEL_FREEBSD
+#include <sys/sysctl.h>
+#include <sys/types.h>
+#endif
+
+#if KERNEL_LINUX
+#define MAX_AVAIL_FREQS 20
+
+static int num_cpu;
+
+struct cpu_data_t {
+ value_to_rate_state_t time_state[MAX_AVAIL_FREQS];
+} * cpu_data;
+
+/* Flags denoting capability of reporting CPU frequency statistics. */
+static bool report_p_stats = false;
+
+static void cpufreq_stats_init(void) {
+ cpu_data = calloc(num_cpu, sizeof(*cpu_data));
+ if (cpu_data == NULL)
+ return;
+
+ report_p_stats = true;
+
+ /* Check for stats module and disable if not present. */
+ for (int i = 0; i < num_cpu; i++) {
+ char filename[PATH_MAX];
+
+ snprintf(filename, sizeof(filename),
+ "/sys/devices/system/cpu/cpu%d/cpufreq/stats/time_in_state", i);
+ if (access(filename, R_OK)) {
+ NOTICE("cpufreq plugin: File %s not exists or no access. P-State "
+ "statistics will not be reported. Check if `cpufreq-stats' kernel "
+ "module is loaded.",
+ filename);
+ report_p_stats = false;
+ break;
+ }
+
+ snprintf(filename, sizeof(filename),
+ "/sys/devices/system/cpu/cpu%d/cpufreq/stats/total_trans", i);
+ if (access(filename, R_OK)) {
+ NOTICE("cpufreq plugin: File %s not exists or no access. P-State "
+ "statistics will not be reported. Check if `cpufreq-stats' kernel "
+ "module is loaded.",
+ filename);
+ report_p_stats = false;
+ break;
+ }
+ }
+ return;
+}
+#endif /* KERNEL_LINUX */
-static int num_cpu = 0;
+static int cpufreq_init(void) {
+#if KERNEL_LINUX
+ char filename[PATH_MAX];
-static int cpufreq_init (void)
-{
- int status;
- char filename[256];
+ num_cpu = 0;
- num_cpu = 0;
+ while (1) {
+ int status = snprintf(filename, sizeof(filename),
+ "/sys/devices/system/cpu/cpu%d/cpufreq/"
+ "scaling_cur_freq",
+ num_cpu);
+ if ((status < 1) || ((unsigned int)status >= sizeof(filename)))
+ break;
- 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;
+ if (access(filename, R_OK))
+ break;
- if (access (filename, R_OK))
- break;
+ num_cpu++;
+ }
- num_cpu++;
- }
+ INFO("cpufreq plugin: Found %d CPU%s", num_cpu, (num_cpu == 1) ? "" : "s");
+ cpufreq_stats_init();
- INFO ("cpufreq plugin: Found %d CPU%s", num_cpu,
- (num_cpu == 1) ? "" : "s");
+ if (num_cpu == 0)
+ plugin_unregister_read("cpufreq");
+#elif KERNEL_FREEBSD
+ char mib[] = "dev.cpu.0.freq";
+ int cpufreq;
+ size_t cf_len = sizeof(cpufreq);
- if (num_cpu == 0)
- plugin_unregister_read ("cpufreq");
+ if (sysctlbyname(mib, &cpufreq, &cf_len, NULL, 0) != 0) {
+ WARNING("cpufreq plugin: sysctl \"%s\" failed.", mib);
+ plugin_unregister_read("cpufreq");
+ }
+#endif
- return (0);
+ return 0;
} /* int cpufreq_init */
-static void cpufreq_submit (int cpu_num, double value)
-{
- value_t values[1];
- value_list_t vl = VALUE_LIST_INIT;
+static void cpufreq_submit(int cpu_num, const char *type,
+ const char *type_instance, value_t *value) {
+ value_list_t vl = VALUE_LIST_INIT;
- values[0].gauge = value;
+ vl.values = value;
+ vl.values_len = 1;
+ sstrncpy(vl.plugin, "cpufreq", sizeof(vl.plugin));
+ snprintf(vl.plugin_instance, sizeof(vl.plugin_instance), "%i", cpu_num);
+ if (type != NULL)
+ sstrncpy(vl.type, type, sizeof(vl.type));
+ if (type_instance != NULL)
+ sstrncpy(vl.type_instance, type_instance, sizeof(vl.type_instance));
- 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);
-
- plugin_dispatch_values (&vl);
+ plugin_dispatch_values(&vl);
}
-static int cpufreq_read (void)
-{
- int status;
- unsigned long long val;
- int i = 0;
- FILE *fp;
- char filename[256];
- char buffer[16];
-
- for (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);
+#if KERNEL_LINUX
+static void cpufreq_read_stats(int cpu) {
+ char filename[PATH_MAX];
+ /* Read total transitions for cpu frequency */
+ snprintf(filename, sizeof(filename),
+ "/sys/devices/system/cpu/cpu%d/cpufreq/stats/total_trans", cpu);
+
+ value_t v;
+ if (parse_value_file(filename, &v, DS_TYPE_DERIVE) != 0) {
+ ERROR("cpufreq plugin: Reading \"%s\" failed.", filename);
+ return;
+ }
+ cpufreq_submit(cpu, "transitions", NULL, &v);
+
+ /* Determine percentage time in each state for cpu during previous
+ * interval. */
+ snprintf(filename, sizeof(filename),
+ "/sys/devices/system/cpu/cpu%d/cpufreq/stats/time_in_state", cpu);
+
+ FILE *fh = fopen(filename, "r");
+ if (fh == NULL) {
+ ERROR("cpufreq plugin: Reading \"%s\" failed.", filename);
+ return;
+ }
+
+ int state_index = 0;
+ cdtime_t now = cdtime();
+ char buffer[DATA_MAX_NAME_LEN];
+
+ while (fgets(buffer, sizeof(buffer), fh) != NULL) {
+ unsigned int frequency;
+ unsigned long long time;
+
+ /*
+ * State time units is 10ms. To get rate of seconds per second
+ * we have to divide by 100. To get percents we have to multiply it
+ * by 100 back. So, just use parsed value directly.
+ */
+ if (!sscanf(buffer, "%u%llu", &frequency, &time)) {
+ ERROR("cpufreq plugin: Reading \"%s\" failed.", filename);
+ break;
+ }
+
+ char state[DATA_MAX_NAME_LEN];
+ snprintf(state, sizeof(state), "%u", frequency);
+
+ if (state_index >= MAX_AVAIL_FREQS) {
+ NOTICE("cpufreq plugin: Found too many frequency states (%d > %d). "
+ "Plugin needs to be recompiled. Please open a bug report for "
+ "this.",
+ (state_index + 1), MAX_AVAIL_FREQS);
+ break;
+ }
+
+ gauge_t g;
+ if (value_to_rate(&g, (value_t){.derive = time}, DS_TYPE_DERIVE, now,
+ &(cpu_data[cpu].time_state[state_index])) == 0) {
+ /*
+ * Due to some inaccuracy reported value can be a bit greatrer than 100.1.
+ * That produces gaps on charts.
+ */
+ if (g > 100.1)
+ g = 100.1;
+ cpufreq_submit(cpu, "percent", state, &(value_t){.gauge = g});
+ }
+ state_index++;
+ }
+ fclose(fh);
+}
+#endif /* KERNEL_LINUX */
+
+static int cpufreq_read(void) {
+#if KERNEL_LINUX
+ for (int cpu = 0; cpu < num_cpu; cpu++) {
+ char filename[PATH_MAX];
+ /* Read cpu frequency */
+ snprintf(filename, sizeof(filename),
+ "/sys/devices/system/cpu/cpu%d/cpufreq/scaling_cur_freq", cpu);
+
+ value_t v;
+ if (parse_value_file(filename, &v, DS_TYPE_GAUGE) != 0) {
+ WARNING("cpufreq plugin: Reading \"%s\" failed.", filename);
+ continue;
+ }
+
+ /* convert kHz to Hz */
+ v.gauge *= 1000.0;
+
+ cpufreq_submit(cpu, "cpufreq", NULL, &v);
+
+ if (report_p_stats)
+ cpufreq_read_stats(cpu);
+ }
+#elif KERNEL_FREEBSD
+ /* FreeBSD currently only has 1 freq setting. See BUGS in cpufreq(4) */
+ char mib[] = "dev.cpu.0.freq";
+ int cpufreq;
+ size_t cf_len = sizeof(cpufreq);
+
+ if (sysctlbyname(mib, &cpufreq, &cf_len, NULL, 0) != 0) {
+ WARNING("cpufreq plugin: sysctl \"%s\" failed.", mib);
+ return 0;
+ }
+
+ value_t v;
+ /* convert Mhz to Hz */
+ v.gauge = cpufreq * 1000000.0;
+
+ cpufreq_submit(0, "cpufreq", NULL, &v);
+#endif
+ return 0;
} /* int cpufreq_read */
-void module_register (void)
-{
- plugin_register_init ("cpufreq", cpufreq_init);
- plugin_register_read ("cpufreq", cpufreq_read);
+void module_register(void) {
+ plugin_register_init("cpufreq", cpufreq_init);
+ plugin_register_read("cpufreq", cpufreq_read);
}
projects / collectd.git / blobdiff