Track and log UV event loop ticks in debug builds

llarp/ev/ev_libuv.cpp

@@ -791,6 +791,12 @@ namespace libuv
   {
     if(uv_loop_init(&m_Impl) == -1)
       return false;
+
+#ifdef LOKINET_DEBUG
+    last_time      = 0;
+    loop_run_count = 0;
+#endif
+
     m_Impl.data = this;
     uv_loop_configure(&m_Impl, UV_LOOP_BLOCK_SIGNAL, SIGPIPE);
     m_TickTimer.data = this;
@@ -834,6 +840,16 @@ namespace libuv
   {
     if(m_Run)
     {
+#ifdef LOKINET_DEBUG
+      if ((uv_now(&m_Impl) - last_time) > 1000)
+      {
+        llarp::LogInfo("UV EVENT LOOP TICKS LAST SECOND: ", loop_run_count);
+        loop_run_count = 0;
+        last_time = uv_now(&m_Impl);
+      }
+      loop_run_count++;
+#endif
+
       uv_timer_start(&m_TickTimer, &OnTickTimeout, ms, 0);
       uv_run(&m_Impl, UV_RUN_ONCE);
     }
@@ -954,4 +970,4 @@ bool
 llarp_ev_udp_recvmany(struct llarp_udp_io* u, struct llarp_pkt_list* pkts)
 {
   return static_cast< libuv::udp_glue* >(u->impl)->RecvMany(pkts);
-}
+}

llarp/ev/ev_libuv.hpp

@@ -98,6 +98,11 @@ namespace libuv
     uv_loop_t m_Impl;
     uv_timer_t m_TickTimer;
     std::atomic< bool > m_Run;
+
+#ifdef LOKINET_DEBUG
+    uint64_t last_time;
+    uint64_t loop_run_count;
+#endif
   };
 
 }  // namespace libuv