Changeset 3085

Timestamp:

12/02/2012 13:33:41 (3 months ago)

Author:

chris

Message:

Initialise the EWMA rate average to 0, and comment on variables in log message.

File:

• box/trunk/lib/server/TcpNice.cpp (modified) (2 diffs)

box/trunk/lib/server/TcpNice.cpp

@@ -36 +36 @@
   mAlphaStar(100),
   mDeltaPercent(10)
-{ }
+{
+        mRateEstimateMovingAverage[0] = 0;
+        mRateEstimateMovingAverage[1] = 0;
+}
 
 // --------------------------------------------------------------------------
@@ -68 +71 @@
                 ((mDeltaPercent * rateLastPeriod) / 100);
         
+        /*
+         * b is the number of bytes sent during the previous control period
+         * T is the length (in us) of the previous control period
+         * rtt is the round trip time (in us) reported by the kernel on the socket 
+         * e is epsilon, a parameter of the formula, calculated as alpha/rtt
+         * rb is the actual rate (goodput) over the previous period
+         * rbhat is the previous (last-but-one) EWMA rate estimate
+         * raw is the unscaled adjustment to the window size
+         * gamma is the scaled adjustment to the window size
+         * wb is the final window size
+         */
+
         BOX_TRACE("TcpNice: "
                 "b=" << bytesChange << ", "