Abstract: Systems and methods for computing with multiple nodes. In some embodiments, the method includes: determining that a first data value in a cache is a global data value; setting a first flag to indicate that the first data value is a global data value; and selectively invalidating one or more portions of the cache, wherein the selective invalidating of the cache includes: determining, based on the first flag, that the first data value is a global data value; and based on the determining, invalidating the first data value.

Abstract: A microprocessor embodies a poisoning technique with regard to load and store instructions that are related through a common memory reference. The microprocessor includes “store sets” that are created for loads and stores that share a common memory reference and that must execute in program order. The store sets include a value that points to a poison bit in a store set poison table that indicates whether a store instruction that is part of the store set is poisoned by a load instruction that prior to the store. If the store instruction is poisoned, a subsequent store set related load instruction will also be poisoned. That is, the present technique causes poison to propagate from a parent store to a subsequent memory reference dependent load using a store set.