diff --git a/a8/sysutils.cc b/a8/sysutils.cc
index f62dfd8..5e47ea9 100644
--- a/a8/sysutils.cc
+++ b/a8/sysutils.cc
@@ -12,9 +12,18 @@ namespace a8
 {
     a8::tick_t XGetTickCount()
     {
+        #if 1
+        struct timeval tv;
+        gettimeofday(&tv, NULL);
+        long long time = tv.tv_usec;
+        time /= 1000;
+        time += (tv.tv_sec * 1000);
+        return time;
+        #else
         struct timespec ts;
         clock_gettime(CLOCK_MONOTONIC, &ts);
         return (ts.tv_sec*1000 + ts.tv_nsec/(1000*1000));
+        #endif
     }
 
     long long XGetNanoSeconds()
diff --git a/a8/timer.cc b/a8/timer.cc
index 39a71dc..73c00fd 100644
--- a/a8/timer.cc
+++ b/a8/timer.cc
@@ -245,7 +245,7 @@ namespace a8
         int idle_time = 1;
         for (int lv1_idx = base_->timer_tick & TVR_MASK; lv1_idx < TVR_SIZE; ++lv1_idx) {
             if (!list_empty(base_->tv1.vec + lv1_idx)) {
-                return idle_time;
+                return idle_time <= 1 ? 1 : idle_time - 1;
             }
             ++idle_time;
         }
@@ -257,7 +257,7 @@ namespace a8
             idle_time += TVR_SIZE;
         }
         #endif
-        return idle_time;
+        return idle_time <= 1 ? 1 : idle_time - 1;
     }
 
     void Timer::UpdateTimer()