Shared request grouping in a computing system

A computer program product comprising a non-transitory computer readable storage medium containing computer code that, when executed by a computer, implements a method for shared request grouping, wherein the method comprises:

• receiving a new shared request for placement in a request queue, and based on receiving the new shared request for placement in the request queue:
• determining the presence of at least one shared request in the request queue, and based on determining that at least one shared request is present in the queue:
• determining the presence of a waiting exclusive request located in the queue after the at least one shared request, and based on determining that a waiting exclusive request is located in the queue after the at least one shared request:
• determining whether grouping the new shared request with the at least one shared request exceeds a deferral limit of the waiting exclusive request, wherein the deferral limit comprises one of:
• a maximum number of requests that are permitted to be queued ahead of the exclusive request before execution of the exclusive request, a number of later-arriving shared requests that are permitted to jump ahead of the exclusive request in the queue, a maximum total amount of time the exclusive request is permitted to wait in the queue before execution of the exclusive request, and a maximum permitted amount of waiting time for the exclusive request that is permitted to occur based on moving of later-arriving shared requests ahead of the exclusive request in the queue;
• and
• based on determining that grouping the new shared request with the at least one shared request does not exceed the deferral limit of the waiting exclusive request, grouping the new shared request with the at least one shared request.

A computing system comprising:

• a processor;
• a memory;
• and
• a queuing module configured to:
• receive a new shared request for placement in a request queue in the memory;
• determine the presence of at least one shared request in the request queue, and based on determining that at least one shared request is present in the queue:
• determine the presence of a waiting exclusive request located in the queue after the at least one shared request, and based on determining that a waiting exclusive request is located in the queue after the at least one shared request:
• determine whether grouping the new shared request with the at least one shared request exceeds a deferral limit of the waiting exclusive request, wherein the deferral limit comprises one of:
• a maximum number of requests that are permitted to be queued ahead of the exclusive request before execution of the exclusive request by the processor, a number of later-arriving shared requests that are permitted to jump ahead of the exclusive request in the queue, a maximum total amount of time the exclusive request is permitted to wait in the queue before execution of the exclusive request, and a maximum permitted amount of waiting time for the exclusive request that is permitted to occur based on moving of later-arriving shared requests ahead of the exclusive request in the queue;
• and
• based on determining that grouping the new shared request with the at least one shared request does not exceed the deferral limit of the waiting exclusive request, group the new shared request with the at least one shared request.