Abstract: For efficient task scheduling using a locking mechanism, a new task is allowed to spin on the locking mechanism if a number of tasks spinning on the locking mechanism is less than a predetermined threshold for parallel operations requiring locks between the multiple threads.

Abstract: A rack-power control module (RPC) module is used for allowing a local storage partition, located on a local server, for controlling a destination storage partition, located on a destination server, by piggybacking commands on power alerts issued by the RPC module in a clustered storage system.

Abstract: Provided are a computer program product, system, and method for managing a lock to a resource shared among a plurality of processors. Slots in a memory implement the lock on the shared resource. The slots correspond to counter values that are consecutively numbered and indicate one of busy and free. A requesting processor fetches a counter value comprising a fetched counter value. A determination is made as to whether the slot corresponding to the fetched counter value indicates free. A processor identifier of the requesting processor is inserted into the slot corresponding to the fetched counter value in response to determining that the slot corresponding to the fetched counter value indicates not free. The requesting processor accesses the shared resource in response to determining that the slot corresponding to the fetched counter value indicates free.

Abstract: A set of like tasks to be performed is organized into a first group. Upon a determined imbalance between dispatch queue depths greater than a predetermined threshold, the set of like tasks is reassigned to an additional group.