Establishing dependency in a resource retry queue

A method, comprising:

• storing, by an arbitration circuit, a cache management transaction in a respective entry in a retry queue circuit, in response to determining that the cache management transaction is currently unable to be processed;
• prior to attempting a retry of the cache management transaction, determining that a previously queued memory transaction in a respective entry in the retry queue circuit blocks the cache management transaction based on a target address field included in the respective entry for the previously queued memory transaction corresponding to a target address field included in the respective entry for the cache management transaction;
• initiating a retry, by the retry queue circuit, of the blocking memory transaction;
• and
• initiating a retry, by the retry queue circuit, of the cache management transaction, in response to determining that the blocking memory transaction has been processed.

An apparatus, comprising:

• a transaction arbiter circuit configured to:
• receive a plurality of memory transactions, including a cache management transaction;
• and
• determine whether a received memory transaction can currently be processed by a transaction pipeline;
• and
• a retry queue circuit configured to:
• queue, in respective retry queue entries, a subset of memory transactions that the transaction arbiter circuit determines cannot be processed by the transaction pipeline;
• and
• in response to receiving a memory transaction that is a cache management transaction, determine, prior to attempting a retry of the cache management transaction, that a previously queued memory transaction in the retry queue circuit blocks the cache management transaction;
• and
• in response to the determination that the previously queued memory transaction blocks the cache management transaction, modify a victim address field in a respective retry queue entry for the cache management transaction to establish a dependency to the previously queued memory transaction.