the "proper" way to identify the bitness of your kernel and CPU
Sharpe, Sam J
sam.sharpe+lists.redhat at gmail.com
Fri Apr 3 19:07:33 UTC 2009
2009/4/3 Robert P. J. Day <rpjday at crashcourse.ca>:
>
> what is the fedora-approved way to identify the wordsize of both
> your running kernel and your CPU? for the kernel, i'm used to running
>
> $ uname -r
>
> and just looking at the suffix, which in my case would be either
> "i686" or "x86_64". is there a simpler way?
# man arch
NAME
arch - print machine hardware name (same as uname -m)
# arch
x86_64
# uname -m
x86_64
> and, secondly, regardless of the bitness of the kernel, what about
> identifying the wordsize of the actual CPU (since you can obviously
> have a 32-bit kernel running on an x86_64 CPU).
>
> my standard tricks are one of:
>
> $ grep lm /proc/cpuinfo (where "lm" stands for long mode)
> $ getconf LONG_BIT (should print 32 or 64)
I like to get it in the same format as the output of arch:
[[ $(grep lm /proc/cpuinfo) ]] && echo x86_64 || echo i686
--
Sam
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