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Author Topic: On a 64-bit physical processor; Are 32-bit and 64-bit architecture separate?  (Read 1385 times)

Offline xor

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On a 64-bit physical processor; Are 32-bit and 64-bit architecture separate?

currently in 32-bit operating system; It runs 64 bit 2 operating system together with VM simultaneously! how that happens ?

processor AMD A4-5300

Offline hiro

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amd64 cpus are backwards compatible and can run 32bit stuff, too.
if you run a 64bit kernel, you can still have a 32bit userland in linux.
if you run a VM you can run either 32bit or 64 bit inside without issue, too.
some linux distros allow you to run under the 64bit kernel both 64bit and 32bit userland at the same time with a complicated mechanism called multilib. the resulting complexity is gross.
you can have the same effect by just running a second userland inside a chroot, i do this all the time. so i have multiple linux userland root filesystems instead of multilib.

Offline xor

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Thank you for the information

Offline xor

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I think I made a technical discovery
to prove it scientifically
using the same math processor commands
I am considering 32-bit and 64-bit simultaneous pi measurement.

http://forum.tinycorelinux.net/index.php/topic,24096.0.html

amd64 cpus are backwards compatible and can run 32bit stuff, too.
if you run a 64bit kernel, you can still have a 32bit userland in linux.
if you run a VM you can run either 32bit or 64 bit inside without issue, too.
some linux distros allow you to run under the 64bit kernel both 64bit and 32bit userland at the same time with a complicated mechanism called multilib. the resulting complexity is gross.
you can have the same effect by just running a second userland inside a chroot, i do this all the time. so i have multiple linux userland root filesystems instead of multilib.