page coloring

05 Jun 2019

Page(cache) Coloring

Address translation allows pages of physical memory to be mapped into a process address space. Problem might accrue between cache and vm(virtual memory) since the virtual address on a process switch caches need to be flushed because they no longer contain the right data. physical address can break spatial locality if non-contiguous memory pages are mapped to contiguous ranges of virtual memory. If virtually contiguous pages conflict int the cache.

Solution

Use the Physical Addresses with smart allocation. Allocate pages that will show up in contiguous cache lines to contiguous addresses in the virtual memory.