| 摘要 |
The preferred embodiment involves a multi-CPU system capable of determining whether the system as a whole is overloaded and whether each individual CPU (core) is overloaded by a single application thread. The preferred method involves sampling total CPU usage in the system by at least one software process; checking the total CPU usage for each application thread belonging to the at least one software process against at least one high water mark level if the total CPU usage in the system by the at least one software process is at or above the at least one high water mark level; indicating an overload level if the at least one high water mark level is met or exceeded by any application thread; designating the system to be in the overload level corresponding to the highest of the at least one high water mark level met or exceeded; utilizing a set of rejection rules to throttle traffic in the system based on the overload level; and beginning normal processing of traffic in the system if total CPU usage by each application thread falls to or below a low water mark level.
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