lkml.org 
[lkml]   [2019]   [May]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] sched: introduce configurable delay before entering idle
On Mon, May 13, 2019 at 05:20:37PM +0800, Wanpeng Li wrote:
> On Wed, 8 May 2019 at 02:57, Marcelo Tosatti <mtosatti@redhat.com> 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.

\
 
 \ /
  Last update: 2019-05-14 15:55    [W:0.098 / U:28.612 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site