I think this is kernel dependent and probably will change over time depending on the kernel a release uses, correct me if wrong
I'd like to know two things for all the currently supported Ubuntu releases:
How many maximum CPUs can Ubuntu handle (by default) at the same time with a standard desktop kernel? Is that count different from a server kernel and 32bit/64bit systems?
Where can I find that information on my system?
Best Answer
Maximum CPUs (i.e. cores) supported by default:
12.04 LTS (and later):
11.10 and below, including 10.04 LTS
How to find the maximum supported by your running kernel:
As @otus indicated, open a terminal with
Ctrl-Alt-T
, and type:The "default" maximum is not the maximum!
BIGSMP=y
is 512MAXSMP=y
is 4096 (or more!)