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Sunny Cove extends virtual addresses to 57 meaningful bits...The new limits enable 128PB of virtual address space and 4PB of physical memory. This is interesti
by wcdolphin 8y ago
Sunny Cove extends virtual addresses to 57 meaningful bits...The new limits enable 128PB of virtual address space and 4PB of physical memory.
This is interesting to me. At first glance I couldn’t really figure out “why now”. But
I guess with Optane there really will be a need for addressing petabytes of ram, as it will span DRAM and Optane. It seems Intel thinks it will be a competitive advantage.
- ridiculous_fish 8y agoI wonder about the bincompat of such a change. "32-bit clean" all over again?
- slededit 8y agoX64 was designed with this in mind. All non-active bits must be the same value (a so called canonical address) or the processor will fault. You can’t use them for flag bits unless you make sure to clear them before dereferencing memory.