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How many bits of virtual address space has current x86-64 im
Posted: Tue Apr 04, 2006 11:57 pm
by hendric
According to x86-64 manuals volume2 I found it supported up to 48 bits but implementations could implement less.As I read about the documentations of Linux on mm policy of x86-64 architecture Andi said current X86-64 implementations only support 40 bits of address space.Is it now still 40 bits?
Re:How many bits of virtual address space has current x86-64
Posted: Wed Apr 05, 2006 2:15 am
by hendric
I've got it. AMD Athlon? 64 Processors now support full 48-bit virtual addresses.It's cool!
Re:How many bits of virtual address space has current x86-64
Posted: Wed Apr 05, 2006 3:21 am
by paulbarker
'cat /proc/cpuinfo' says 40 bits physical, 48 bits virtual. I think thats standard, at least for an X2.
I'll stop showing off now.
Re:How many bits of virtual address space has current x86-64
Posted: Thu Apr 06, 2006 4:33 am
by Candy
hendric wrote:
I've got it. AMD Athlon? 64 Processors now support full 48-bit virtual addresses.It's cool!
Read that info from the MSR's, current tests give no guarantee for the future. Make your code work by specs, not just by tests.