On Mon, Feb 11, 2008 at 4:20 PM, Steven Seeger
<[EMAIL PROTECTED]> wrote:
> The overhead was measured by only comparing cpu usage between tasks from
> the statistics collection stuff. There are some userland tasks running
> at 8khz, so apparently this is a problem for Xenomai on this board. I
> had no problem at all with these tasks in kernel space under rtai.
user-space adds some overhead compared to kernel-space. Enabling the
T_FPU bis for a task which does not need also adds the useless
overhead of saving/restoring FPU upon context switch.
--
Gilles Chanteperdrix
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