On Fri, 10 Jan 2020 at 22:12, Thomas Gleixner <tglx@xxxxxxxxxxxxx> wrote: > > Wanpeng, > > Wanpeng Li <kernellwp@xxxxxxxxx> writes: > > > Hi Thomas, > > On Wed, 23 Oct 2019 at 16:29, Thomas Gleixner <tglx@xxxxxxxxxxxxx> 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. > > > > I didn't find WIP tag for this work after ~half year since v4 was > > posted https://lkml.org/lkml/2019/6/28/231 Could you apply this patch > > for temporary because the completion time of refactor is not > > deterministic. > > Could you please repost it? Just repost, thanks Thomas. Wanpeng
