Difference between revisions of "Network Latencies"
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==Description:== | ==Description:== | ||
What are the driving forces behind network latency? What is latency? | |||
Latency is the amount of time needed for a packet to go from place A to B, and to receive a response packet from B back to A. | |||
[t=0, place=A] send packet to B ==> [t=25, place=B] Sent response to A ===> [t=50, place=A] | |||
Network latency together with bandwidth are the two major <b>harware</b> inhibitors for parallel computing. This holds for clusters and grids, but also for system-on-a-chip solutions like the Cell architecture, which in fact is a cluster/grid on a chip. | |||
==Enablers:== | ==Enablers:== | ||
*Demand for latency sensitive applications: | |||
**Online computer games | |||
**high performance computing | |||
**video conferencing | |||
**voice over IP, etc. | |||
*Optical Fibres | |||
==Inhibitors:== | ==Inhibitors:== | ||
Speed of light, network switching techology. | |||
Revision as of 19:38, 12 March 2005
Description:
What are the driving forces behind network latency? What is latency?
Latency is the amount of time needed for a packet to go from place A to B, and to receive a response packet from B back to A.
[t=0, place=A] send packet to B ==> [t=25, place=B] Sent response to A ===> [t=50, place=A]
Network latency together with bandwidth are the two major harware inhibitors for parallel computing. This holds for clusters and grids, but also for system-on-a-chip solutions like the Cell architecture, which in fact is a cluster/grid on a chip.
Enablers:
- Demand for latency sensitive applications:
- Online computer games
- high performance computing
- video conferencing
- voice over IP, etc.
- Optical Fibres
Inhibitors:
Speed of light, network switching techology.