Granted Patent B2

US 8,867,350 · App. 13/555,649 · Granted Oct 21, 2014

Abstract

Claims (34)

1. A computer-implemented method comprising:

transmitting a plurality of packets to a packet switching device;

receiving packets from said packet switching device; and

determining at a particular time, based on packets transmitted to said packet switching device and packets received from said packet switching device, a number of packets being held in a memory of said packet switching device,

wherein said transmitting a plurality of packets to a packet switching device includes providing a transmit timestamp for each packet transmitted,

wherein said receiving packets from said packet switching device further comprises recording said transmit time stamp for each packet received and recording a receive timestamp for each packet arriving at said packet switching device

wherein determining from said transmit timestamps and said receive timestamps one of: a forwarding rate for packets through said packet switching device, a number of lost packets for said packet switching device, a latency for packets through said packet switching device.

2. The method of claim 1 further comprising providing performance results of said packet switching device to a user, said performance results including at least one of the group comprising a number of packets held by said packet switching device, a forwarding rate of said packet switching device, a packet loss rate of said packet switching device, and a latency of said packet switching device.

3. The method of claim 2 wherein said providing performance results to a user comprises providing said results in a graphical form.

4. The method of claim 1 wherein said packet switching device is used in a loss-less manner wherein when said packet switching device has a predetermined number of packets in memory a stop transmit message is sent to the traffic generator.

5. The method of claim 1 wherein buffering capabilities of said packet switching device are classified on a per-stream basis by associating buffer measurement details with other data embedded in the arriving packet stream.

6. A non-transitory computer readable storage medium having computer readable code thereon for packet buffering measurement, the medium including instructions in which a computer system performs operations comprising:

transmitting a plurality of packets to a packet switching device;

receiving packets from said packet switching device; and

determining at a particular time, based on packets transmitted to said packet switching device and packets received from said packet switching device, a number of packets being held in a memory of said packet switching device,

wherein said transmitting a plurality of packets to a packet switching device includes providing a transmit timestamp for each packet transmitted,

wherein said receiving packets from said packet switching device further comprises recording said transmit time stamp for each packet received and recording a receive timestamp for each packet arriving at said packet switching device

wherein determining from said transmit timestamps and said receive timestamps one of: a forwarding rate for packets through said packet switching device, a number of lost packets for said packet switching device, a latency for packets through said packet switching device.

7. The computer readable storage medium of claim 6 further comprising providing performance results of said packet switching device to a user, said performance results including at least one of the group comprising a number of packets held by said packet switching device, a forwarding rate of said packet switching device, a packet loss rate of said packet switching device, and a latency of said packet switching device.

8. The computer readable storage medium of claim 7 wherein said providing performance results to a user comprises providing said results in a graphical form.

9. The computer readable storage medium of claim 6 wherein said packet switching device is used in a loss-less manner wherein when said packet switching device has a predetermined number of packets in memory a stop transmit message is sent to the traffic generator.

10. The computer readable storage medium of claim 6 wherein buffering capabilities of said packet switching device are classified on a per-stream basis by associating buffer measurement details with other data embedded in the arriving packet stream.

11. A computer system comprising:

a memory;

a processor;

a communications interface;

an interconnection mechanism coupling the memory, the processor and the communications interface; and

wherein the memory is encoded with an application providing packet buffering measurement, that when performed on the processor, provides a process for processing information, the process causing the first AP to perform the operations of:

transmitting a plurality of packets to a packet switching device;

receiving packets from said packet switching device; and

determining at a particular time, based on packets transmitted to said packet switching device and packets received from said packet switching device, a number of packets being held in a memory of said packet switching device,

wherein said transmitting a plurality of packets to a packet switching device includes providing a transmit timestamp for each packet transmitted,

wherein said receiving packets from said packet switching device further comprises recording said transmit time stamp for each packet received and recording a receive timestamp for each packet arriving at said packet switching device

wherein determining from said transmit timestamps and said receive timestamps one of: a forwarding rate for packets through said packet switching device, a number of lost packets for said packet switching device, a latency for packets through said packet switching device.

Assignments (13)