search for: tick_nohz

On 2017-11-16 16:45, Peter Zijlstra wrote: > On Wed, Nov 15, 2017 at 11:03:08PM +0100, Thomas Gleixner wrote: >> If I understand the problem correctly then he wants to avoid the heavy >> lifting in tick_nohz_idle_enter() in the first place, but there is already >> an interesting quirk there which makes it exit early. > Sure. And there are people who want to do the same for native. > > Adding more ugly and special cases just isn't the way to go about doing > that. > > I'm...

On 2017-11-16 16:45, Peter Zijlstra wrote: > On Wed, Nov 15, 2017 at 11:03:08PM +0100, Thomas Gleixner wrote: >> If I understand the problem correctly then he wants to avoid the heavy >> lifting in tick_nohz_idle_enter() in the first place, but there is already >> an interesting quirk there which makes it exit early. > Sure. And there are people who want to do the same for native. > > Adding more ugly and special cases just isn't the way to go about doing > that. > > I'm...

...pensive than bare metal. Add a generic idle poll before enter > > real idle path. When a reschedule event is pending, we can bypass > > the real idle path. > > Why not do a HV specific idle driver? If I understand the problem correctly then he wants to avoid the heavy lifting in tick_nohz_idle_enter() in the first place, but there is already an interesting quirk there which makes it exit early. See commit 3c5d92a0cfb5 ("nohz: Introduce arch_needs_cpu"). The reason for this commit looks similar. But lets not proliferate that. I'd rather see that go away. But the irq_t...

...pensive than bare metal. Add a generic idle poll before enter > > real idle path. When a reschedule event is pending, we can bypass > > the real idle path. > > Why not do a HV specific idle driver? If I understand the problem correctly then he wants to avoid the heavy lifting in tick_nohz_idle_enter() in the first place, but there is already an interesting quirk there which makes it exit early. See commit 3c5d92a0cfb5 ("nohz: Introduce arch_needs_cpu"). The reason for this commit looks similar. But lets not proliferate that. I'd rather see that go away. But the irq_t...