In a cache stash relay, first data, from a producer device, is stashed in a shared cache of a data processing system. The first data is associated with first data addresses in a shared memory of the data processing system. An address pattern of the first data addresses is identified. When a request for second data, associated with a second data address, is received from a processing unit of the data processing system, any data associated with data addresses in the identified address pattern are relayed from the shared cache to a local cache of the processing unit if the second data address is in the identified address pattern. The relaying may include pushing the data from the shared cache to the local cache or a pre-fetcher of the processing unit pulling the data from the shared cache to the local cache in response to a message.