| Steven McCanne and Van Jacobson. An Efficient, Extensible, and Portable Network Monitor. Work in progress. |
....Research, in New Jersey. This trace represents a much smaller client population than the proxy trace. All packets between internal users and TCP port 80 (the default HTTP server port, used for more than 99.4 of the HTTP references seen at this site) on external servers were captured using tcpdump [14]. Packets between external users and the AT T Labs Research Web server were not monitored. A negligible number of packets were lost due to buffer overruns. The raw packet traces were later processed offline, to generate an HTTP level trace, as described in section 3.3. Between Friday, November ....
Steven McCanne and Van Jacobson. An Efficient, Extensible, and Portable Network Monitor. Work in progress.
....in the opposite order from an observer near host B. This relativistic effect rarely appears. Packet traces can be difficult to analyze, even for an expert, but some help can be provided. For example, although TCP s 32 bit sequence numbers are hard to deal with directly, the tcpdump program [11] reports not the absolute sequence numbers but the relative value since the first observed packet of a connection. It seems even more useful to report the difference in sequence numbers between two successive packets, because that can be directly related to the amount of data transferred. Also, by ....
Steven McCanne and Van Jacobson. An Efficient, Extensible, and Portable Network Monitor. Work in progress.
....per second. At that rate, a host has about 4.4 usec. to process each packet. 8.1. Initial experiments In our initial tests, we used a DECstation 3000 500 (SPECint92 = 74.3) running an unmodified DEC OSF 1 V3.0 kernel to monitor an FDDI LAN. The DECstation was running the tcpdump application [11], which was simply copying the first 40 bytes of each packet to dev null. 28 ELIMINATING RECEIVE LIVELOCK IN AN INTERRUPT DRIVEN KERNEL We used a packet generator to flood an FDDI LAN with 80 byte packets, and found that the monitoring system livelocked at between 21,000 and 24,000 ....
Steven McCanne and Van Jacobson. An Efficient, Extensible, and Portable Network Monitor. Work in progress.
....Hill, New Jersey. This trace represents a much smaller client population than the proxy trace. All packets between internal users and TCP port 80 (the default HTTP server port, used for more than 99.4 of the HTTP references seen at this site) on external servers were captured using tcpdump [13]. A negligible number of packets were lost due to buffer overruns. The raw packet traces were later reassembled into individual TCP streams. This is a complex process, described in more detail in [14] These streams were then split into files representing the body of each successful request and ....
S. McCanne and V. Jacobson. An Efficient, Extensible, and Portable Network Monitor. Work in progress.
Online articles have much greater impact More about CiteSeer.IST Add search form to your site Submit documents Feedback
CiteSeer.IST - Copyright Penn State and NEC