Techniques for prefetching are provided. The techniques include receiving a first prefetch command; in response to determining that a history buffer indicates that first information associated with the first prefetch command has not already been prefetched, prefetching the first information into a memory; receiving a second prefetch command; and in response to determining that the history buffer indicates that second information associated with the second prefetch command has already been prefetched, avoiding prefetching the second information into the memory.