International Business Machines Corporation

Alessandra Masci

Giuseppe Longobardi

Chiara Conti

Pia Toro

Mariella Corbacio

Enrico Nocerini

Processes requiring access to shared resources are adapted to issue a reservation request, such that a place in a resource access queue, such as one administered by means of a semaphore system, can be reserved for the process. The reservation is issued by a Reservation Management module at a time calculated to ensure that the reservation reaches the head of the queue as closely as possible to the moment at which the process actually needs access to the resource. The calculation may be made on the basis of priority information concerning the process itself, and statistical information gathered concerning historical performance of the queue.

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Alessandra Masci