Re: High resolution timers and BH processing on -RT

Thomas Gleixner
2005-01-28T08:20:26Z

On Fri, 2005-01-28 at 05:43 +0100, Ingo Molnar wrote:
> *
> is this due to algorithmic/PIT-programming overhead, or due to the noise
> introduced by other, non-hard-RT timers? I'd guess the later from the
> looks of it, but did your test introduce such noise (via networking and
> application workloads?).
>

Right, it's due to noise by non-RT timers, which I enforced by adding
networking and applications.

This adds random timer expires and admittedly the PIT reprogramming
overhead is adding portions of that noise.

tglx