Optimal replacement is NP-hard for nonstandard caches

  title={Optimal replacement is NP-hard for nonstandard caches},
  author={Mark Brehob and Stephen Wagner and Eric Torng and Richard J. Enbody},
  journal={IEEE Transactions on Computers},
When examining a new cache structure or replacement policy, the optimal policy is a useful baseline. We prove that finding the optimal schedule is NP-hard for any but the simplest of caches, and that no polynomial-time approximation scheme exists for this problem unless P=NP. 


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Accurate Data Layout into Blocks May Boost Cache Performance

  • D. Truong, F. Bodin, A. Seznec
  • Proc. Interact-2, pp. 55-57, Feb. 1997.
  • 1997
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