Apparatus and method for controlling cache coherence in virtualized environment based on multi-core

摘要

PURPOSE: A cache consistency controlling device in multicore based virtual environment and a method thereof are provided to reduce communication quantity according to a consistency message transmitted for maintaining the cache consistency in the multicore based virtual environment, thereby increasing system performance. CONSTITUTION: A monitoring unit(10) generates mapping information between cores and a virtual processor of a virtual machine and generates state information which sharing of a page is shown. When generation of a cache miss is detected, a sharing inspecting unit(20) inspects page sharing caused by the virtual machine about data which cache miss is detected by using the mapping information and the state information. A processing unit(30) selectively transmits a consistency message by allowing virtual processors included in the same virtual machine to consider a mapped core according to an inspecting result. [Reference numerals] (10) Monitoring unit; (13) Virtual processor map register; (15) Shadow page table; (17) Residence counter; (20) Sharing inspecting unit; (25) Conversion index buffer; (30) Processing unit; (50) Core; (AA) Cache