X-Git-Url: https://git.verplant.org/?a=blobdiff_plain;f=src%2Fcpufreq.c;h=21b6429a18d7b9eb4e47de0ee4c5a4e41b94ffea;hb=50339a2982d56ec9faad833d9a5e589329be52f9;hp=1441f0b9be8849ed59681ddc92fd7b6ec4202568;hpb=a03f5073767f2d2716c40b8d739426440bb8bf5f;p=collectd.git

diff --git a/src/cpufreq.c b/src/cpufreq.c
index 1441f0b9..21b6429a 100644
--- a/src/cpufreq.c
+++ b/src/cpufreq.c
@@ -37,7 +37,7 @@ struct cpu_data_t {
 static bool report_p_stats = false;
 
 static void cpufreq_stats_init(void) {
-  cpu_data = calloc(num_cpu, sizeof(struct cpu_data_t));
+  cpu_data = calloc(num_cpu, sizeof(*cpu_data));
   if (cpu_data == NULL)
     return;
 
@@ -116,12 +116,81 @@ static void cpufreq_submit(int cpu_num, const char *type,
   plugin_dispatch_values(&vl);
 }
 
+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);
+}
+
 static int cpufreq_read(void) {
-  for (int i = 0; i < num_cpu; i++) {
+  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) {
@@ -132,66 +201,10 @@ static int cpufreq_read(void) {
     /* convert kHz to Hz */
     v.gauge *= 1000.0;
 
-    cpufreq_submit(i, "cpufreq", NULL, &v);
-
-    if (report_p_stats) {
-      /* Read total transitions for cpu frequency */
-      snprintf(filename, sizeof(filename),
-               "/sys/devices/system/cpu/cpu%d/cpufreq/stats/total_trans", i);
-      if (parse_value_file(filename, &v, DS_TYPE_COUNTER) != 0) {
-        ERROR("cpufreq plugin: Reading \"%s\" failed.", filename);
-        continue;
-      }
-      cpufreq_submit(i, "counter", "transitions", &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", i);
-
-      FILE *fh = fopen(filename, "r");
-      if (fh == NULL) {
-        ERROR("cpufreq plugin: Reading \"%s\" failed.", filename);
-        continue;
-      }
-
-      int j = 0;
-      cdtime_t now = cdtime();
-      char buffer[DATA_MAX_NAME_LEN];
-
-      while (fgets(buffer, sizeof(buffer), fh) != NULL) {
-        unsigned long long time;
-        char state[DATA_MAX_NAME_LEN];
-
-        /*
-         * 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, "%s%llu", state, &time)) {
-          ERROR("cpufreq plugin: Reading \"%s\" failed.", filename);
-          break;
-        }
-
-        if (j < MAX_AVAIL_FREQS) {
-          gauge_t g;
-          if (value_to_rate(&g, (value_t){.counter = time}, DS_TYPE_COUNTER,
-                            now, &(cpu_data[i].time_state[j])) != 0) {
-            j++;
-            continue;
-          }
-          cpufreq_submit(i, "percent", state, &(value_t){.gauge = g});
-        } else {
-          NOTICE("cpufreq plugin: Found too much frequency states (%d > %d). "
-                 "Plugin needs to be recompiled. Please open a bug report for "
-                 "this.",
-                 (j + 1), MAX_AVAIL_FREQS);
-          break;
-        }
-        j++;
-      }
-      fclose(fh);
-    }
+    cpufreq_submit(cpu, "cpufreq", NULL, &v);
+
+    if (report_p_stats)
+      cpufreq_read_stats(cpu);
   }
   return 0;
 } /* int cpufreq_read */