search for: pv_idle_ops

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) whi...

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) whi...

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 latency...

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 perf...

..., 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 >>>>> inc...

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 TSC de...

...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 Docu...

...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 Docu...

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 TSC de...

...> 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...

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 access(L...

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 access(L...

...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 >>...

...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 >>>>> inc...

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) which...

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) which...

...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 access(L...

...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 access(L...

...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 Docu...