Adding small example on system load average

k0ffee · Dec 19, 2017 · 6a5bbd9 · 6a5bbd9
1 parent 3376917
commit 6a5bbd9
Showing 1 changed file with 29 additions and 0 deletions.
diff --git a/loadavg.c b/loadavg.c
@@ -0,0 +1,29 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main() {
+    double loadavg;
+    static const double maxload = 150;
+
+    /*
+     * 1-minute sample:
+     *     double loadavg;
+     *     if (getloadavg(&loadavg, 1) == 1)
+     *     if (loadavg < maxload) ...
+     * 5-minute sample (using second element returned by getloadavg):
+     *     double loadavg[2];
+     *     if (getloadavg(loadavg, 2) == 2)
+     *     if (loadavg[1] < maxload) ...
+     */
+
+    if (getloadavg(&loadavg, 1) == 1) {
+
+        if (loadavg < maxload) {
+            printf("%f < %f\n", loadavg, maxload);
+        } else if (loadavg >= maxload) {
+            printf("%f >= %f\n", loadavg, maxload);
+        }
+    }
+
+    return 0;
+}