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ARMV8 48-vs-52-bit mode

KamGators

What are the advantages and disadvantages of using 48-bit -vs- 52-bit addressing in armv8 processors?  Other than the obvious 52-bit gives more address space are there any drawbacks to use it etc..?

 

thx

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  • +1

    Well extra software and hardware is needed to implement it. I don't think the extra level in the page tables will have a noticeable space or time penalty. I can't think of anything this particularly helps in software besides just providing more space.  On the plus side if you have a system that needs enough physical memory to require it I think you'll have definite bragging rights. ;-)

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  • +1

    Well extra software and hardware is needed to implement it. I don't think the extra level in the page tables will have a noticeable space or time penalty. I can't think of anything this particularly helps in software besides just providing more space.  On the plus side if you have a system that needs enough physical memory to require it I think you'll have definite bragging rights. ;-)

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