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The Redistributor is responsible for PPIs and SGIs that are associated with its related cluster or group of cores. A Redistributor is also referred to as a PPI block.
The following figure shows the Redistributor block.
The Redistributor performs the following functions:
There can be multiple Redistributors in a configuration and they can be sized to match your system. For example, if you have two clusters of eight cores, then you can have one Redistributor positioned next to each cluster. You can use a Redistributor for each cluster to reduce the PPI wiring and enable the Redistributor to be powered down with the cores for extra power savings. Alternatively, for a small system, combining all cores into one Redistributor block might be the best solution. See Configuration options in the Arm®CoreLink™ GIC‑600 Generic Interrupt Controller Configuration and Integration Manual for more information.