Jan Kiszka wrote:
> Philippe Gerum wrote:
>>On Tue, 2007-06-12 at 08:42 +0200, M. Koehrer wrote:
>>>I want to know why the --enable-smp option for "configure" of Xenomai is
>>>used when there
>>>is already the corresponding option selected with the kernel configuration?
>>--enable-smp is only used when you want the user-space side to _require_
>>SMP support to be present into the running kernel; i.e. for some (weird)
>>reason, your application really needs this. Xenomai libraries don't care
>>whether SMP support is enabled or not, they are not sensitive to that
>>issue (see the "weak" status of this option in README.INSTALL)
> Switchtest bases some compile-time decisions on CONFIG_SMP. Nitpicking,
> OK, but I wonder if this is required. Gilles?
If you do not enable the smp option, switchtest will only use one cpu.
The reason why I made this is that, on some UP machine, (probably arm,
but I do no longer remember) sysconf(_SC_NPROCESSORS_ONLN) did not work.
Xenomai-core mailing list