Adaptive power down of intra-chip interconnect

The hash function used by the processors on a multi-processor chip to distribute accesses to the various last-level caches via the links is changed according to which last-level caches (and/or links) that are active (e.g., 'on') and which are in a lower power consumption mode (e.g., 'off'.) A first hash function is used to distribute accesses to all of the last-level caches and all of the links when all of the last-level caches are 'on.' A second hash function is used to distribute accesses to the appropriate subset of the last-level caches and corresponding subset of links when some of the last-level caches are 'off.' Data can be sent to only the active last-level caches via active links. By shutting off links connected to caches and components that are in a lower power consumption mode, the power consumption of the chip is reduced.