+/*
+ * This is used to avoid floating point rounding problems.
+ * It is added to ev_rt_now when scheduling periodics
+ * to ensure progress, time-wise, even when rounding
+ * errors are against us.
+ * This value is good at least till the year 4000
+ * and intervals up to 20 years.
+ * Better solutions welcome.
+ */
+#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
+