search for: pv_idle

On 2017/11/13 18:53, Juergen Gross wrote: > On 13/11/17 11:06, Quan Xu wrote: >> From: Quan Xu <quan.xu0 at gmail.com> >> >> So far, pv_idle_ops.poll is the only ops for pv_idle. .poll is called >> in idle path which will poll for a while before we enter the real idle >> state. >> >> In virtualization, idle path includes several heavy operations >> includes timer access(LAPIC timer or TSC deadline timer) wh...

On 2017/11/13 18:53, Juergen Gross wrote: > On 13/11/17 11:06, Quan Xu wrote: >> From: Quan Xu <quan.xu0 at gmail.com> >> >> So far, pv_idle_ops.poll is the only ops for pv_idle. .poll is called >> in idle path which will poll for a while before we enter the real idle >> state. >> >> In virtualization, idle path includes several heavy operations >> includes timer access(LAPIC timer or TSC deadline timer) wh...

From: Quan Xu <quan.xu0 at gmail.com> So far, pv_idle_ops.poll is the only ops for pv_idle. .poll is called in idle path which will poll for a while before we enter the real idle state. In virtualization, idle path includes several heavy operations includes timer access(LAPIC timer or TSC deadline timer) which will hurt performance especially for lat...

...Wanpeng Li wrote: > 2017-11-14 15:02 GMT+08:00 Quan Xu <quan.xu0 at gmail.com>: >> >> On 2017/11/13 18:53, Juergen Gross wrote: >>> On 13/11/17 11:06, Quan Xu wrote: >>>> From: Quan Xu <quan.xu0 at gmail.com> >>>> >>>> So far, pv_idle_ops.poll is the only ops for pv_idle. .poll is called >>>> in idle path which will poll for a while before we enter the real idle >>>> state. >>>> >>>> In virtualization, idle path includes several heavy operations >>>> includes timer acce...

...Wanpeng Li wrote: > 2017-11-14 15:02 GMT+08:00 Quan Xu <quan.xu0 at gmail.com>: >> >> On 2017/11/13 18:53, Juergen Gross wrote: >>> On 13/11/17 11:06, Quan Xu wrote: >>>> From: Quan Xu <quan.xu0 at gmail.com> >>>> >>>> So far, pv_idle_ops.poll is the only ops for pv_idle. .poll is called >>>> in idle path which will poll for a while before we enter the real idle >>>> state. >>>> >>>> In virtualization, idle path includes several heavy operations >>>> includes timer acce...

On 2017/11/14 15:30, Juergen Gross wrote: > On 14/11/17 08:02, Quan Xu wrote: >> >> On 2017/11/13 18:53, Juergen Gross wrote: >>> On 13/11/17 11:06, Quan Xu wrote: >>>> From: Quan Xu <quan.xu0 at gmail.com> >>>> >>>> So far, pv_idle_ops.poll is the only ops for pv_idle. .poll is called >>>> in idle path which will poll for a while before we enter the real idle >>>> state. >>>> >>>> In virtualization, idle path includes several heavy operations >>>> includes timer acce...

On 2017/11/14 15:30, Juergen Gross wrote: > On 14/11/17 08:02, Quan Xu wrote: >> >> On 2017/11/13 18:53, Juergen Gross wrote: >>> On 13/11/17 11:06, Quan Xu wrote: >>>> From: Quan Xu <quan.xu0 at gmail.com> >>>> >>>> So far, pv_idle_ops.poll is the only ops for pv_idle. .poll is called >>>> in idle path which will poll for a while before we enter the real idle >>>> state. >>>> >>>> In virtualization, idle path includes several heavy operations >>>> includes timer acce...

...ross wrote: >>> On 14/11/17 08:02, Quan Xu wrote: >>>> On 2017/11/13 18:53, Juergen Gross wrote: >>>>> On 13/11/17 11:06, Quan Xu wrote: >>>>>> From: Quan Xu <quan.xu0 at gmail.com> >>>>>> >>>>>> So far, pv_idle_ops.poll is the only ops for pv_idle. .poll is called >>>>>> in idle path which will poll for a while before we enter the real idle >>>>>> state. >>>>>> >>>>>> In virtualization, idle path includes several heavy operations >...

...ross wrote: >>> On 14/11/17 08:02, Quan Xu wrote: >>>> On 2017/11/13 18:53, Juergen Gross wrote: >>>>> On 13/11/17 11:06, Quan Xu wrote: >>>>>> From: Quan Xu <quan.xu0 at gmail.com> >>>>>> >>>>>> So far, pv_idle_ops.poll is the only ops for pv_idle. .poll is called >>>>>> in idle path which will poll for a while before we enter the real idle >>>>>> state. >>>>>> >>>>>> In virtualization, idle path includes several heavy operations >...

On 13/11/17 11:06, Quan Xu wrote: > From: Quan Xu <quan.xu0 at gmail.com> > > So far, pv_idle_ops.poll is the only ops for pv_idle. .poll is called > in idle path which will poll for a while before we enter the real idle > state. > > In virtualization, idle path includes several heavy operations > includes timer access(LAPIC timer or TSC deadline timer) which will > hurt...

2017-11-14 15:02 GMT+08:00 Quan Xu <quan.xu0 at gmail.com>: > > > On 2017/11/13 18:53, Juergen Gross wrote: >> >> On 13/11/17 11:06, Quan Xu wrote: >>> >>> From: Quan Xu <quan.xu0 at gmail.com> >>> >>> So far, pv_idle_ops.poll is the only ops for pv_idle. .poll is called >>> in idle path which will poll for a while before we enter the real idle >>> state. >>> >>> In virtualization, idle path includes several heavy operations >>> includes timer access(LAPIC timer or TS...

On 14/11/17 08:02, Quan Xu wrote: > > > On 2017/11/13 18:53, Juergen Gross wrote: >> On 13/11/17 11:06, Quan Xu wrote: >>> From: Quan Xu <quan.xu0 at gmail.com> >>> >>> So far, pv_idle_ops.poll is the only ops for pv_idle. .poll is called >>> in idle path which will poll for a while before we enter the real idle >>> state. >>> >>> In virtualization, idle path includes several heavy operations >>> includes timer access(LAPIC timer or TS...

...gmail.com>: >>> >>> >>> On 2017/11/13 18:53, Juergen Gross wrote: >>>> >>>> On 13/11/17 11:06, Quan Xu wrote: >>>>> >>>>> From: Quan Xu <quan.xu0 at gmail.com> >>>>> >>>>> So far, pv_idle_ops.poll is the only ops for pv_idle. .poll is called >>>>> in idle path which will poll for a while before we enter the real idle >>>>> state. >>>>> >>>>> In virtualization, idle path includes several heavy operations >>>>>...

..., Juergen Gross wrote: >> On 14/11/17 08:02, Quan Xu wrote: >>> >>> On 2017/11/13 18:53, Juergen Gross wrote: >>>> On 13/11/17 11:06, Quan Xu wrote: >>>>> From: Quan Xu <quan.xu0 at gmail.com> >>>>> >>>>> So far, pv_idle_ops.poll is the only ops for pv_idle. .poll is called >>>>> in idle path which will poll for a while before we enter the real idle >>>>> state. >>>>> >>>>> In virtualization, idle path includes several heavy operations >>>>>...

On 2017/8/29 21:55, Konrad Rzeszutek Wilk wrote: > On Tue, Aug 29, 2017 at 11:46:35AM +0000, Yang Zhang wrote: >> So far, pv_idle_ops.poll is the only ops for pv_idle. .poll is called in >> idle path which will polling for a while before we enter the real idle >> state. >> >> In virtualization, idle path includes several heavy operations >> includes timer access(LAPIC timer or TSC deadline timer)...

On 2017/8/29 21:55, Konrad Rzeszutek Wilk wrote: > On Tue, Aug 29, 2017 at 11:46:35AM +0000, Yang Zhang wrote: >> So far, pv_idle_ops.poll is the only ops for pv_idle. .poll is called in >> idle path which will polling for a while before we enter the real idle >> state. >> >> In virtualization, idle path includes several heavy operations >> includes timer access(LAPIC timer or TSC deadline timer)...

...> On 14/11/17 08:02, Quan Xu wrote: >>>>> On 2017/11/13 18:53, Juergen Gross wrote: >>>>>> On 13/11/17 11:06, Quan Xu wrote: >>>>>>> From: Quan Xu <quan.xu0 at gmail.com> >>>>>>> >>>>>>> So far, pv_idle_ops.poll is the only ops for pv_idle. .poll is >>>>>>> called >>>>>>> in idle path which will poll for a while before we enter the real >>>>>>> idle >>>>>>> state. >>>>>>> >>>>>&g...

...ems not working so far. V1 -> V2: - integrate the smart halt poll into paravirt code - use idle_stamp instead of check_poll - since it hard to get whether vcpu is the only task in pcpu, so we don't consider it in this series.(May improve it in future) --- Quan Xu (4): x86/paravirt: Add pv_idle_ops to paravirt ops KVM guest: register kvm_idle_poll for pv_idle_ops Documentation: Add three sysctls for smart idle poll tick: get duration of the last idle loop Yang Zhang (2): sched/idle: Add a generic poll before enter real idle path KVM guest: introduce smart idle poll algorithm...

...ems not working so far. V1 -> V2: - integrate the smart halt poll into paravirt code - use idle_stamp instead of check_poll - since it hard to get whether vcpu is the only task in pcpu, so we don't consider it in this series.(May improve it in future) --- Quan Xu (4): x86/paravirt: Add pv_idle_ops to paravirt ops KVM guest: register kvm_idle_poll for pv_idle_ops Documentation: Add three sysctls for smart idle poll tick: get duration of the last idle loop Yang Zhang (2): sched/idle: Add a generic poll before enter real idle path KVM guest: introduce smart idle poll algorithm...