CAPS: Cache Allocation with Partial Sharing

In a multicore system, effective management of shared last level cache (LLC) has attracted significant research attention. However, almost none of the existing solutions had been implemented on a real system until Intel introduced Cache Allocation Technology (CAT) to its commodity processors recently. CAT itself implements way partitioning and thus can only allocate at a coarse granularity, which does not scale well for a large thread or program count to serve their various performance goals effectively. We overcome these limitations by deliberately and precisely sharing part of the allocations among programs and cores.