From 22e0e649b19573a6e166d627ec3156279a65a309 Mon Sep 17 00:00:00 2001
From: Stephen Birarda <commit@birarda.com>
Date: Tue, 18 Oct 2016 16:16:09 -0700
Subject: [PATCH] add a comment for ack count calculations

---
 libraries/networking/src/udt/TCPVegasCC.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libraries/networking/src/udt/TCPVegasCC.cpp b/libraries/networking/src/udt/TCPVegasCC.cpp
index c811b2d2ea..5738ea8421 100644
--- a/libraries/networking/src/udt/TCPVegasCC.cpp
+++ b/libraries/networking/src/udt/TCPVegasCC.cpp
@@ -263,6 +263,9 @@ void TCPVegasCC::performRenoCongestionAvoidance(SequenceNumber ack) {
         // increase the window size by (1 / window size) for every ACK received
         _ackAICount += numAcked;
         if (_ackAICount >= preAIWindowSize) {
+            // when _ackAICount % preAIWindowSize == 0 then _ackAICount is 0
+            // when _ackAICount % preAIWindowSize != 0 then _ackAICount is _ackAICount - (_ackAICount % preAIWindowSize)
+
             int delta = _ackAICount / preAIWindowSize;
 
             _ackAICount -= delta * preAIWindowSize;