NDT-DEV email list created

Revision: 556
Author:   

Date:     Mon Aug 29 09:12:49 2011
Log:      Added comments to explain algorithms that used constants as best
the reason could be determined.

jeff


http://code.google.com/p/ndt/source/detail?r=556

Modified:
 /branches/kkumar_code_organize/Applet/Tcpbw100.java

=======================================
--- /branches/kkumar_code_organize/Applet/Tcpbw100.java	Mon Aug 29 08:36:48  
2011
+++ /branches/kkumar_code_organize/Applet/Tcpbw100.java	Mon Aug 29 09:12:49  
2011
@@ -3284,7 +3284,7 @@
                        // Add connection details to statistics pane and 
email text

                        // Is the connection receiver limited?
-                       if (rwintime > .015) {
+                       if (rwintime > NDTConstants.BUFFER_LIMITED) {
                                _txtStatistics.append(_resBundDisplayMsgs
                                                .getString("thisConnIs")
                                                + " "
@@ -3313,7 +3313,7 @@
                        }

                        // Is the connection sender limited?
-                       if (sendtime > .015) {
+                       if (sendtime > NDTConstants.BUFFER_LIMITED) {
                                _txtStatistics.append(_resBundDisplayMsgs
                                                .getString("thisConnIs")
                                                + " "
@@ -3336,6 +3336,9 @@
                        }

                        // Is the connection network limited?
+                        // If the congestion window is limited more than  
0.5%
+                        // of the time, NDT claims the connection is  
network
+                        // limited.
                        if (cwndtime > .005) {
                                _txtStatistics.append(_resBundDisplayMsgs
                                                .getString("thisConnIs")
@@ -3352,6 +3355,9 @@


                        // Is the loss excessive?
+                        // If the link speed is less than a T3, and loss
+                        // is greater than .01 percent, loss is determined
+                        // to be excessive.
                        if ((spd < 4) && (loss > .01)) {
                                // If packet loss rate > 1%
                                
_txtStatistics.append(_resBundDisplayMsgs.getString("excLoss")
@@ -3397,6 +3403,9 @@
                        if (_iMaxRwinRcvd < 
NDTConstants.TCP_MAX_RECV_WIN_SIZE)
                                _iWinScaleRcvd = 0; //Max rec window size 
lesser than TCP's max value,
                                                    // so, no scaling 
requested
+                                                    // According to  
RFC1323, Section 2.3 the max valid value of _iWinScaleRcvd is 14.
+                                                    // Unclear why NDT  
uses 20 for this, but leaving for now in case this is a web100
+                                                    // error value of some  
kind. (Revisit after Methodology document written.)
                        if ((_iWinScaleRcvd == 0) || (_iWinScaleRcvd > 20))
                                
_txtStatistics.append(_resBundDisplayMsgs.getString("off")
                                                + "\n");