Messages in this thread | | | Date | Mon, 18 May 2015 14:07:30 -0400 | From | Richard Yao <> | Subject | Is there anyway to do direct mapped cache on Intel hardware? |
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Is there anyway to do direct mapped cache on Intel hardware?
Direct mapped cache should allow me to implement software ECC via the low memory / high memory split. It would be slow, but I would prefer to have a slow laptop than one that is vulnerable to bit flips.
If direct mapped cache is possible and non-NUMA systems could avoid writing it back/through, I imagine that people could also protect against cold boot attacks by encrypting main memory. This would be also be slow, but the AES instructions that Intel's newer processors are supposed to have should keep the slowdown within some reasonable bound.
There might also be applications for using external memory algorithms (e.g. fractal tree indexes) to speed up in-memory operations. I also am not sure if the difference between system memory and cache is big enough to make it a win, but I am sure that is not something that I would want to implement on my laptop in my spare time.
If someone knows a way to do direct mapped cache, please share.
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