NDT-DEV email list created

Revision: 523
Author:   

Date:     Wed Aug 24 08:53:49 2011
Log:      Added description of the missing web100 variables:  
CurTimeoutCount, AbruptTimeouts and ThruBytesAcked.
http://code.google.com/p/ndt/source/detail?r=523

Modified:
 /wiki/NDTProtocol.wiki

=======================================
--- /wiki/NDTProtocol.wiki      Wed Aug 17 09:43:08 2011
+++ /wiki/NDTProtocol.wiki      Wed Aug 24 08:53:49 2011
@@ -446,6 +446,7 @@

 = Appendix A. web100 variables =

+|| !AbruptTimeouts || The number of timeouts that occurred without any  
immediately preceding duplicate acknowledgments or other indications of  
congestion. Abrupt Timeouts indicate that the path lost an entire window of  
data or acknowledgments. Timeouts that are preceded by duplicate  
acknowledgments or other congestion signals (e.g., ECN) are not counted as  
abrupt, and might have been avoided by a more sophisticated Fast Retransmit  
algorithm. ||
 || CurMSS || The current maximum segment size (MSS), in octets.||
 || X_Rcvbuf || The socket receive buffer size in octets.  Note that the  
meaning of this variable is implementation dependent.  In particular, it  
may or may not include the reassembly queue. ||
 || X_Sndbuf || The socket send buffer size in octets.  Note that the  
meaning of this variable is implementation dependent. Particularly, it may  
or may not include the retransmit queue. ||
@@ -461,6 +462,7 @@
 || !CurRwinRcvd || The most recent window advertisement received, in  
octets. ||
 || !CurRwinSent || The most recent window advertisement sent, in octets. ||
 || !CurSsthresh || The current slow start threshold in octets. ||
+|| !CurTimeoutCount || The current number of times the retransmit timeout  
has expired without receiving an acknowledgment for new data.  
tcpEStatsStackCurTimeoutCount is reset to zero when new data is  
acknowledged and incremented for each invocation of section 5.5 in  
[http://www.ietf.org/rfc/rfc2988.txt RFC2988]. ||
 || DSACKDups || The number of duplicate segments reported to the local  
host by D-SACK blocks. ||
 || !DataBytesIn || The number of octets contained in received data  
segments, including retransmitted data.  Note that this does not include  
TCP headers. ||
 || !DataBytesOut || The number of octets of data contained in transmitted  
segments, including retransmitted data.  Note that this does not include  
TCP headers. ||
@@ -505,6 +507,7 @@
 || !SndLimBytesSender || The cumulative bytes sent while in the 'Sender  
Limited' state, as determined by the Local Host, when the Local Host is a  
sender.  This state is entered whenever TCP transmission stops because  
there is no more data in sender's buffer. ||
 || !SubsequentTimeouts || The number of times the retransmit timeout has  
expired after the RTO has been doubled. See section 5.5 in  
[http://www.ietf.org/rfc/rfc2988.txt RFC2988]. ||
 || SumRTT || The sum of all sampled round trip times. ||
+|| !ThruBytesAcked || The number of octets for which cumulative  
acknowledgments have been received, on systems that can receive more than  
10 million bits per second.  Note that this will be the sum of changes in  
tcpEStatsAppSndUna. ||
 || Timeouts || The number of times the retransmit timeout has expired when  
the RTO backoff multiplier is equal to one. ||
 || !TimestampsEnabled || Enabled(1) if TCP timestamps have been negotiated  
on, selfDisabled(2) if they are disabled or not implemented on the local  
host, or peerDisabled(3) if not negotiated by the remote hosts. ||
 || !WinScaleRcvd || The value of the received window scale option if one  
was received; otherwise, a value of -1. ||