RHEL Kernel Performance Optimization, Characterization ... - Red Hat

The Translation Lookaside Buffer (TLB) is asmall CPU cache of recently used virtual tophysical address mappingsTLB misses are extremely expensive ontoday's very fast, pipelined CPUsLarge memory applicationscan incur high TLB miss ratesHugeTLBs permit memory to bemanaged in very large segments●E.G. Itanium ® :HugeTLBFSTLB●Standard page: 16KB●●Default huge page: 256MB16000:1 difference128 data128 instructionPhysical MemoryFile system mapping interfaceIdeal for databasesVirtual AddressSpace●E.G. TLB can fully map a 32GBOracle SGARed Hat Confidential