Efficient critical thread scheduling for non privileged thread requests

A system for scheduling threads, comprising:

• a processor, coupled with a memory, and configured to perform the actions of:
• selectively setting a first selection of one or more cores from among a plurality of cores as at least one privileged core in a privileged pool and a second selection of one or more cores from among the plurality of cores as at least one regular core in a regular pool, each at least one privileged core in the privileged pool providing a higher throughput than each at least one regular core in the regular pool;
• monitoring, according to a plurality of attribute rules, for a call by the non-privileged thread request to another application programming interface of a type of call specified in an attribute rule of the plurality of attribute rules applied by an operating system interface from among a plurality of application programming interfaces;
• responsive to the operating system interface detecting the call by a non-privileged thread request to the another particular application programming interface of a type of call specified in the plurality of attribute rules applied by the operating system interface, automatically setting a scheduling attribute of the non-privileged thread request to a critical setting;
• responsive to detecting the non-privileged thread request with the scheduling attribute set to the critical setting to request access to the privileged pool, selectively scheduling the non-privileged thread request into a privileged core queue associated with the privileged pool only when a resource availability of the at least one privileged core meets a threshold level of availability, and automatically scheduling the non-privileged thread request into a regular core queue when the resource availability of the at least one privileged core does not meet the threshold level of availability;
• and
• responsive to detecting a privileged thread request with the scheduling attribute set to the critical setting, automatically scheduling the privileged thread request into the privileged core queue which dispatches to the at least one privileged core only from among the plurality of cores.

A computer program product for scheduling threads, the computer program product comprising a computer readable storage medium having program instructions embodied therewith, the program instructions executable by a processor to cause the processor to:

• selectively set a first selection of one or more cores from among a plurality of cores as at least one privileged core in a privileged pool and a second selection of one or more cores from among the plurality of cores as at least one regular core in a regular pool, each at least one privileged core in the privileged pool providing a higher throughput than each at least one regular core in the regular pool;
• monitor, according to a plurality of attribute rules, for a call by the non-privileged thread request to another application programming interface of a type of call specified in an attribute rule of the plurality of attribute rules applied by an operating system interface from among a plurality of application programming interfaces;
• responsive to detecting the call by a non-privileged thread request to the another particular application programming interface of a type of call specified in the plurality of attribute rules applied by the operating system interface, automatically set a scheduling attribute of the non-privileged thread request to a critical setting;
• responsive to detecting the non-privileged thread request with the scheduling attribute set to the critical setting to request access to the privileged pool, selectively schedule the non-privileged thread request into a privileged core queue associated with the privileged pool only when a resource availability of the at least one privileged core meets a threshold level of availability, and automatically schedule the non-privileged thread request into a regular core queue when the resource availability of the at least one privileged core does not meet the threshold level of availability;
• and
• responsive to detecting a privileged thread request with the scheduling attribute set to the critical setting, automatically schedule the privileged thread request into the privileged core queue which dispatches to the at least one privileged core only from among the plurality of cores.