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Re: [PATCH 2/4] timer: relax tick stop in idle entry

From Peter Zijlstra <peterz@infradead.org>
Newsgroups linux.kernel
Subject Re: [PATCH 2/4] timer: relax tick stop in idle entry
Date 2015-11-17 11:30 +0100
Message-ID <qvLGp-3Ky-7@gated-at.bofh.it> (permalink)
References (5 earlier) <qvBnI-5nT-21@gated-at.bofh.it> <qvDzb-6Jk-7@gated-at.bofh.it> <qvEEV-7mW-3@gated-at.bofh.it> <qvEEV-7mW-1@gated-at.bofh.it> <qvGGK-zE-9@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Mon, Nov 16, 2015 at 09:04:03PM -0800, Paul E. McKenney wrote:
> On Mon, Nov 16, 2015 at 06:57:14PM -0800, Arjan van de Ven wrote:
> > On 11/16/2015 6:53 PM, Paul E. McKenney wrote:
> > >Fair point.  When in the five-jiffy throttling state, what can wake up
> > >a CPU?  In an earlier version of this proposal, the answer was "nothing",
> > >but maybe that has changed.
> > 
> > device interrupts are likely to wake the cpus.
> 
> OK, that I cannot help you with.  But presumably if the interrupt handler
> does a wakeup (or similar), that is deferred to the end of the throttling
> interval?  Timers are also deferred, including hrtimers?

This throttling thing only throttles 'normal' tasks, real-time tasks
will still run.
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Re: [PATCH 2/4] timer: relax tick stop in idle entry Thomas Gleixner <tglx@linutronix.de> - 2015-11-16 16:10 +0100
  Re: [PATCH 2/4] timer: relax tick stop in idle entry Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-11-16 23:00 +0100
    Re: [PATCH 2/4] timer: relax tick stop in idle entry Thomas Gleixner <tglx@linutronix.de> - 2015-11-16 23:10 +0100
      Re: [PATCH 2/4] timer: relax tick stop in idle entry Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-11-17 01:20 +0100
        Re: [PATCH 2/4] timer: relax tick stop in idle entry Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-11-19 18:50 +0100
        Re: [PATCH 2/4] timer: relax tick stop in idle entry Peter Zijlstra <peterz@infradead.org> - 2015-11-19 20:10 +0100
          Re: [PATCH 2/4] timer: relax tick stop in idle entry Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-11-19 20:30 +0100
            Re: [PATCH 2/4] timer: relax tick stop in idle entry Peter Zijlstra <peterz@infradead.org> - 2015-11-19 21:00 +0100
              Re: [PATCH 2/4] timer: relax tick stop in idle entry Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-11-20 00:50 +0100
    Re: [PATCH 2/4] timer: relax tick stop in idle entry "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2015-11-16 23:40 +0100
      Re: [PATCH 2/4] timer: relax tick stop in idle entry Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-11-17 00:10 +0100
      Re: [PATCH 2/4] timer: relax tick stop in idle entry Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-11-17 00:20 +0100
        Re: [PATCH 2/4] timer: relax tick stop in idle entry "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2015-11-17 00:30 +0100
          Re: [PATCH 2/4] timer: relax tick stop in idle entry Arjan van de Ven <arjan@linux.intel.com> - 2015-11-17 00:40 +0100
            Re: [PATCH 2/4] timer: relax tick stop in idle entry Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-11-17 00:50 +0100
              Re: [PATCH 2/4] timer: relax tick stop in idle entry "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2015-11-17 01:10 +0100
    Re: [PATCH 2/4] timer: relax tick stop in idle entry Josh Triplett <josh@joshtriplett.org> - 2015-11-16 23:40 +0100
      Re: [PATCH 2/4] timer: relax tick stop in idle entry "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2015-11-17 00:30 +0100
        Re: [PATCH 2/4] timer: relax tick stop in idle entry Josh Triplett <josh@joshtriplett.org> - 2015-11-17 02:50 +0100
          Re: [PATCH 2/4] timer: relax tick stop in idle entry Arjan van de Ven <arjan@linux.intel.com> - 2015-11-17 04:00 +0100
            Re: [PATCH 2/4] timer: relax tick stop in idle entry "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2015-11-17 06:10 +0100
              Re: [PATCH 2/4] timer: relax tick stop in idle entry Peter Zijlstra <peterz@infradead.org> - 2015-11-17 11:30 +0100
                Re: [PATCH 2/4] timer: relax tick stop in idle entry Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-11-17 14:00 +0100
                Re: [PATCH 2/4] timer: relax tick stop in idle entry "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2015-11-17 14:50 +0100
          Re: [PATCH 2/4] timer: relax tick stop in idle entry "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2015-11-17 04:00 +0100

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