Selective distribution of translation entry invalidation requests in a multithreaded data processing system

A processing node for a data processing system including a plurality of processing nodes communicatively coupled to a system fabric, the processing unit comprising:

• a plurality of processor cores, wherein:
• each of the plurality of processor cores includes a register set configured to buffer logical partition (LPAR) information for each of a plurality of LPARs, wherein the LPAR information indicates, for each of the plurality of LPARs, which of the plurality of processing nodes may hold an address translation entry for said each LPAR;
• the plurality of processor cores includes a first processor core configured to select, based on the LPAR information in the register set, a broadcast scope for a multicast request on the system fabric and to issue the multicast request on the system fabric with the selected broadcast scope, wherein the selected broadcast scope includes fewer than all of the plurality of processing nodes;
• and
• the first processor core is configured to update the LPAR information in the register set of a second processor core in another of the plurality of processing nodes via an inter-processor interrupt.

A design structure tangibly embodied in a machine-readable storage device for designing, manufacturing, or testing an integrated circuit, the design structure comprising:

• a processing node for a data processing system including a plurality of processing nodes communicatively coupled to a system fabric, the processing unit including:
• a plurality of processor cores, wherein:
• each of the plurality of processor cores includes a register set configured to buffer logical partition (LPAR) information for each of a plurality of LPARs, wherein the LPAR information indicates, for each of the plurality of LPARs, which of the plurality of processing nodes may hold an address translation entry for said each LPAR;
• the plurality of processor cores includes a first processor core configured to select, based on the LPAR information in the register set, a broadcast scope for a multicast request on the system fabric and to issue the multicast request on the system fabric with the selected broadcast scope, wherein the selected broadcast scope includes fewer than all of the plurality of processing nodes;
• and
• the first processor core is configured to update the LPAR information in the register set of a second processor core in another of the plurality of processing nodes via an inter-processor interrupt.