a request reception unit configured to receive input transactions;

a traffic monitoring module configured to monitor traffic of the input transactions;

N cache schedulers, wherein N is an integer greater than or equal to 2;

a region setting module configured to set N input transaction regions corresponding to each of the N cache schedulers based on the traffic of the input transactions monitored, wherein input transactions are transferred via an input transaction region set in each cache scheduler; and

an access execution unit configured to perform cache memory accesses to input transactions scheduled by the N cache schedulers,

wherein setting the N input transaction regions by the region setting module comprises:

generating a histogram representing the number of memory accesses to addresses of the input transactions;

computing locations in the histogram where integral values for each of the N input transaction regions are equal; and

setting the N input transaction regions based on the computed locations, and

wherein the setting the N input transaction regions by the region setting module is performed if there are no input transactions remaining in all or at least some of the N cache schedulers.