Re: [PATCH 4/6] sched/isolation: Offload residual 1Hz scheduler tick

2018-02-20 Thread Frederic Weisbecker
On Sat, Feb 17, 2018 at 11:50:52AM +0100, Thomas Gleixner wrote: > On Thu, 15 Feb 2018, Frederic Weisbecker wrote: > > > When a CPU runs in full dynticks mode, a 1Hz tick remains in order to > > keep the scheduler stats alive. However this residual tick is a burden > > for bare metal tasks that ca

Re: [PATCH 4/6] sched/isolation: Offload residual 1Hz scheduler tick

2018-02-17 Thread Thomas Gleixner
On Thu, 15 Feb 2018, Frederic Weisbecker wrote: > When a CPU runs in full dynticks mode, a 1Hz tick remains in order to > keep the scheduler stats alive. However this residual tick is a burden > for bare metal tasks that can't stand any interruption at all, or want > to minimize them. > > The usu

[PATCH 4/6] sched/isolation: Offload residual 1Hz scheduler tick

2018-02-14 Thread Frederic Weisbecker
When a CPU runs in full dynticks mode, a 1Hz tick remains in order to keep the scheduler stats alive. However this residual tick is a burden for bare metal tasks that can't stand any interruption at all, or want to minimize them. The usual boot parameters "nohz_full=" or "isolcpus=nohz" will now o