implement exponential back-off cool down for ARM process restarts

1 files changed, 15 insertions, 1 deletions

diff --git a/src/arm/gnunet-service-arm.c b/src/arm/gnunet-service-arm.c
index 19088c5cb..2db2ba0d1 100644
--- a/src/arm/gnunet-service-arm.c
+++ b/src/arm/gnunet-service-arm.c
@@ -1833,7 +1833,21 @@ maint_child_death (void *cls)
                     statcode,
                     GNUNET_STRINGS_relative_time_to_string (pos->backoff,
                                                             GNUNET_YES));
-        /* schedule restart */
+        {
+          /* Reduce backoff based on runtime of the process,
+             so that there is a cool-down if a process actually
+             runs for a while. */
+          struct GNUNET_TIME_Relative runtime;
+          unsigned int minutes;
+
+          runtime = GNUNET_TIME_absolute_get_duration (pos->restart_at);
+          minutes = runtime.rel_value_us / GNUNET_TIME_UNIT_MINUTES.rel_value_us;
+          if (minutes > 31)
+            pos->backoff = GNUNET_TIME_UNIT_ZERO;
+          else
+            pos->backoff.rel_value_us <<= minutes;
+        }
+        /* schedule restart */
         pos->restart_at = GNUNET_TIME_relative_to_absolute (pos->backoff);
         pos->backoff = GNUNET_TIME_STD_BACKOFF (pos->backoff);
         if (NULL != child_restart_task)