On 02/15/2015 07:32 AM, Marius Alksnys wrote:
> At http://wiki.linuxcnc.org/cgi-bin/wiki.pl?UpdatingTo2.7
> 
> apt source lines for two different Debian Wheezy kernels and uses are 
> the same. Shouldn't it be 2.7-rtpreempt ?

Nope, the wiki page is correct.  Both the vanilla kernel and the
rt-preempt kernel use the "uspace" flavor of linuxcnc.

The uspace flavor runs entirely in userspace, which is where it gets its
name.

If you run the uspace flavor of linuxcnc on an rt-preempt kernel, you
get reasonable realtime performance.  In userspace!  Awesome!

If you run the uspace flavor of linuxcnc on a vanilla (non-rt-preempt)
kernel, you get crappy realtime performance, and it behaves like the old
"simulator" flavor.


And by the way, there's a new & better place for the "Updating to 2.7"
documentation, here:

http://linuxcnc.org/docs/2.7/html/getting-started

See specifically the "Getting LinuxCNC" and "Updating LinuxCNC" sections.

I'll update the wiki to point there, hold on...  Ok done!


-- 
Sebastian Kuzminsky

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