If we combine a high speed L1 with a low power L2 we can build a large cache with quite good average access time at an energy level far below using just L1 technology alone. Not shown here, but we could also explore a high-density L2 technology.
Note: the figures in the spreadsheet have abitrary units but the base technology equations have the correct-shaped trends and their means of combing is correct.
| 17: (C) 2012-15, DJ Greaves, University of Cambridge, Computer Laboratory. |