On Fri, Feb 13, 2009 at 01:49:28PM +0100, Ingo Molnar wrote: > > * Frederic Weisbecker <fweisbec@xxxxxxxxx> wrote: > > > So, just a thing. > > -rt make the hrtimer's timers running on softirq context because the hrtimer_interrupt > > doesn't run as a threaded interrupt, and then it is not preemptible right? > > > > In that case, sysprof will continue to run in hardirq context, as before, and > > it will considerably increase the latency. And that matters here. > > So I think it is important to put it on the reminder: > > hm, not sure. Do you know it numerically how much worst-case overhead it > induces? > > Ingo Not at all. But when I find some time, I will compare some rt average tests with and without sysprof. -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
