Re: [PATCH] sched: introduce configurable delay before entering idle

[Marcelo Tosatti]

On Mon, May 13, 2019 at 05:20:37PM +0800, Wanpeng Li wrote:
> On Wed, 8 May 2019 at 02:57, Marcelo Tosatti <mtosatti@xxxxxxxxxx> wrote:
> >
> >
> > Certain workloads perform poorly on KVM compared to baremetal
> > due to baremetal's ability to perform mwait on NEED_RESCHED
> > bit of task flags (therefore skipping the IPI).
> 
> KVM supports expose mwait to the guest, if it can solve this?
> 
> Regards,
> Wanpeng Li

Unfortunately mwait in guest is not feasible (uncompatible with multiple
guests). Checking whether a paravirt solution is possible.