Messages in this thread | | | Date | Fri, 13 Feb 2009 13:49:28 +0100 | From | Ingo Molnar <> | Subject | Re: [patch] rt: sysprof hrtimer fix |
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* Frederic Weisbecker <fweisbec@gmail.com> 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
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