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专利名称：System and method for measuring latency in
a continuous processing system
发明人：Ian D. Marshall,Aleksey Sanin,Mark
Tsimelzon,Robert B. Hagmann
申请号：US121403申请日：20080423公开号：US08046744B1公开日：20111025
专利附图：
摘要：The present invention provides a system and method for measuring latency in acontinuous processing system. The invention involves generating “tracer” messages
that are specifically designed for measuring latency. A tracer message is configured topass through and be outputted by each primitive in the tracer message's path regardlessof the function of the primitive and without changing the state of the primitive. Tracermessages are not filtered by filter primitives or delayed by time-delay primitives. Tracermessages are detected and discarded within loops. These rules provide for predictablebehavior of tracer messages, thereby making them reliable indicators of latency andliveness in the continuous processing system. A tracer message is inserted into thecontinuous processing system at a desired start point for measuring latency. At a desiredend point for measuring latency, latency is measured by calculating the amount of timethe tracer message took to travel from the start point to the end point.
申请人：Ian D. Marshall,Aleksey Sanin,Mark Tsimelzon,Robert B. Hagmann
地址：Sunnyvale CA US,Sunnyvale CA US,Sunnyvale CA US,Palo Alto CA US
国籍：US,US,US,US
代理机构：Sterne, Kessler, Goldstein & Fox P.L.L.C.
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