#include "collectd.h"
-#include "common.h"
#include "plugin.h"
+#include "utils/common/common.h"
-static int num_cpu = 0;
+#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 cpufreq_init(void) {
- int status;
- char filename[256];
+#if KERNEL_LINUX
+ char filename[PATH_MAX];
num_cpu = 0;
while (1) {
- status = snprintf(filename, sizeof(filename),
- "/sys/devices/system/cpu/cpu%d/cpufreq/"
- "scaling_cur_freq",
- num_cpu);
+ 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;
}
INFO("cpufreq plugin: Found %d CPU%s", num_cpu, (num_cpu == 1) ? "" : "s");
+ cpufreq_stats_init();
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 (sysctlbyname(mib, &cpufreq, &cf_len, NULL, 0) != 0) {
+ WARNING("cpufreq plugin: sysctl \"%s\" failed.", mib);
+ plugin_unregister_read("cpufreq");
+ }
+#endif
return 0;
} /* int cpufreq_init */
-static void cpufreq_submit(int cpu_num, value_t value) {
+static void cpufreq_submit(int cpu_num, const char *type,
+ const char *type_instance, value_t *value) {
value_list_t vl = VALUE_LIST_INIT;
- vl.values = &value;
+ vl.values = value;
vl.values_len = 1;
sstrncpy(vl.plugin, "cpufreq", sizeof(vl.plugin));
- sstrncpy(vl.type, "cpufreq", sizeof(vl.type));
- snprintf(vl.type_instance, sizeof(vl.type_instance), "%i", cpu_num);
+ 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));
plugin_dispatch_values(&vl);
}
+#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) {
- for (int i = 0; i < num_cpu; i++) {
+#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", i);
+ "/sys/devices/system/cpu/cpu%d/cpufreq/scaling_cur_freq", cpu);
value_t v;
if (parse_value_file(filename, &v, DS_TYPE_GAUGE) != 0) {
/* convert kHz to Hz */
v.gauge *= 1000.0;
- cpufreq_submit(i, v);
+ 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 */
projects / collectd.git / blobdiff