Hashed Cache Index Mode Support

Hashed Cache Index mode is a new hardware feature available in Niagara2 processors. The hardware uses many more address bits in order to compute an L2 cache index. As a result, there are more page colors for large pages.

To achieve optimum performance, the Solaris kernel must maximize the number of page colors used by all of the threads sharing a cache. The Solaris virtual memory subsystem has been extended to support this new hardware feature. Correct color calculation improves the performance and throughput consistency of application programs on Niagara2 systems.