[lkml]   [2019]   [Oct]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH v2] sched/nohz: Optimize get_nohz_timer_target()
On Wed, 23 Oct 2019 at 16:29, Thomas Gleixner <> wrote:
> On Wed, 23 Oct 2019, Wanpeng Li wrote:
> > I didn't see your refactor to get_nohz_timer_target() which you
> > mentioned in IRC after four months, I can observe cyclictest drop from
> > 4~5us to 8us in kvm guest(we offload the lapic timer emulation to
> > housekeeping cpu to avoid timer fire external interrupt on the pCPU
> > which vCPU resident incur a vCPU vmexit) w/o this patch in the case of
> > there is no busy housekeeping cpu. The score can be recovered after I
> > give stress to create a busy housekeeping cpu.
> >
> > Could you consider applying this patch for temporary since I'm not
> > sure when the refactor can be ready.
> Yeah. It's delayed (again).... Will pick that up.

Sorry, you will pick up the patch or refactor? :)


 \ /
  Last update: 2019-10-23 11:26    [W:0.129 / U:0.048 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site