A simulation based study of TLB performance

  • Authors:
  • J. Bradley Chen;Anita Borg;Norman P. Jouppi

  • Affiliations:
  • -;-;-

  • Venue:
  • ISCA '92 Proceedings of the 19th annual international symposium on Computer architecture
  • Year:
  • 1992

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Abstract

This paper presents the results of a simulation-based study of various translation lookaside buffer (TLB) architectures, in the context of a modern VLSI RISC processor. The simulators used address traces, generated by instrumented versions of the SPEC marks and several other programs running on a DECstation 5000. The performance of two-level TLBs and fully-associative TLBs were investigated. The amount of memory mapped was found to be the dominant factor in TLB performance. Small first-level FIFO instruction TLBs can be effective in two level TLB configurations. For some applications, the cyles-per-instruction (CPI) loss due to TLB misses can be reduced from as much as 5CPI to negligible levels with typical TLB parameters through the use of variable-sized pages.