Messages in this thread | | | Date | Mon, 14 Apr 2014 14:06:00 +0200 | From | Peter Zijlstra <> | Subject | Re: [Query]: tick-sched: why don't we stop tick when we are running idle task? |
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On Mon, Apr 14, 2014 at 05:22:30PM +0530, Viresh Kumar wrote: > On 14 April 2014 17:17, Peter Zijlstra <peterz@infradead.org> wrote: > > What causes this tick? I was under the impression that once there's a > > single task (not doing any syscalls) and the above issues are sorted, no > > more tick would happen. > > This is what Frederic told me earlier: > > https://lkml.org/lkml/2014/2/13/238
That's a bit of a non-answer. I'm fairly sure its not a gazillion issues, since the actual scheduler tick doesn't actually do that much.
So start by enumerating what is actually required.
The 2), which I suppose you're now trying to implement is I think entirely the wrong way. The tick really assumes it runs local, moving it to another CPU is insane.
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