Design tradeoffs for software-managed TLBs

  • Authors:
  • Richard Uhlig;David Nagle;Tim Stanley;Trevor Mudge;Stuart Sechrest;Richard Brown

  • Affiliations:
  • Univ. of Michigan, Ann Arbor;Univ. of Michigan, Ann Arbor;Univ. of Michigan, Ann Arbor;Univ. of Michigan, Ann Arbor;Univ. of Michigan, Ann Arbor;Univ. of Michigan, Ann Arbor

  • Venue:
  • ACM Transactions on Computer Systems (TOCS)
  • Year:
  • 1994

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Abstract

An increasing number of architectures provide virtual memory support through software-managed TLBs. However, software management can impose considerable penalties that are highly dependent on the operating system's structure and its use of virtual memory. This work explores software-managed TLB design tradeoffs and their interaction with a range of monolithic and microkernel operating systems. Through hardware monitoring and simulation, we explore TLB performance for benchmarks running on a MIPS R2000-based workstation running Ultrix, OSF/1, and three versions of Mach 3.0.