PacketHistory - option to track entries' aging to log (#7067)

* PacketHistory debloat RAM allocations

* Removed FLOOD_EXPIRE_TIME option. We have static buffer now.

* Remove mx_ prefix from recentPackets

* Remember no less than 100 packet not to make reflood hell

* Cleanup

* PacketHistory max no less than 100

* no less than 100 means max of 100 or a given value of course.

* Care to not do duplicate entries. Cleanups.

* Packet History - option to log aging of entries

* Update comments for PACKET_HISTORY_TRACE_AGING and VERBOSE_PACKET_HISTORY definitions

---------

Co-authored-by: Ben Meadors <benmmeadors@gmail.com>

src/mesh/PacketHistory.cpp

@@ -12,7 +12,8 @@
 
 #define RECENT_WARN_AGE (10 * 60 * 1000L) // Warn if the packet that gets removed was more recent than 10 min
 
-#define VERBOSE_PACKET_HISTORY 0 // Set to 1 for verbose logging, 2 for heavy debugging
+#define VERBOSE_PACKET_HISTORY 0     // Set to 1 for verbose logging, 2 for heavy debugging
+#define PACKET_HISTORY_TRACE_AGING 1 // Set to 1 to enable logging of the age of re/used history slots
 
 PacketHistory::PacketHistory(uint32_t size) : recentPacketsCapacity(0), recentPackets(NULL) // Initialize members
 {
@@ -254,6 +255,16 @@ void PacketHistory::insert(PacketRecord &r)
 #endif
         }
     }
+
+#if PACKET_HISTORY_TRACE_AGING
+    if (tu->rxTimeMsec != 0) {
+        LOG_INFO("Packet History - insert: Reusing slot aged %.3fs TRACE %s", OldtrxTimeMsec / 1000.,
+                 (tu->id == r.id && tu->sender == r.sender) ? "MATCHED PACKET" : "OLDEST SLOT");
+    } else {
+        LOG_INFO("Packet History - insert: Using new slot @uptime %.3fs TRACE NEW", millis() / 1000.);
+    }
+#endif
+
 #endif
 
 #if VERBOSE_PACKET_HISTORY