Abstract: A method and apparatus for finding bottlenecks in software systems and other systems, given profiles that measure costs of the system. A simple profile interface, which is independent of the system and the method for measuring costs, provides operations for summarizing measurements in any profile that associates costs with paths. Then, an analyst uses one or more search tools which use the operations provided by the interface to generate summaries, where costly summaries represent bottlenecks. The set of operations provided by the interface not only support constructing summaries of cost measurements, but also support computing the overlap of summaries.

Abstract: A method for determining whether to provide a requested service includes steps of receiving a current request for at least one secure service; searching a cache for a stored decision on whether to provide the at least one secure service, wherein the stored decision was made responsive to a prior request that is equivalent to the current request; using the stored decision when the stored decision is found; and performing a security check to determine whether a requested secure service can be granted, if the stored decision is not found. According to other embodiments, the method can be implemented as a computer readable medium including program instructions for performing the method or as an information processing system comprising a processor and memory for performing the method.

Abstract: A method and apparatus for finding bottlenecks in software systems and other systems, given profiles that measure costs of the system. A simple profile interface, which is independent of the system and the method for measuring costs, provides operations for summarizing measurements in any profile that associates costs with paths. Then, an analyst uses one or more search tools which use the operations provided by the interface to generate summaries, where costly summaries represent bottlenecks. The set of operations provided by the interface not only support constructing summaries of cost measurements, but also support computing the overlap of summaries.