search for: last_resid

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2017 Nov 17
2
[PATCH RFC v3 3/6] sched/idle: Add a generic poll before enter real idle path
...q. I also test that the reschedule irq overlap by more than 90% (trace the need_resched status after cpuidle_idle_call), when I run ctxsw/netperf for one minute. as the overlap, I think I can input the last idle state's residency time to make decisions about probabilistic polling, as @dev->last_residency does. it is much easier to get data. 2. do a HV specific idle driver (function) so far, power management is not exposed to guest.. idle is simple for KVM guest, calling "sti" / "hlt"(cpuidle_idle_call() --> default_idle_call()).. thanks Xen guys, who has implemented t...
2017 Nov 17
2
[PATCH RFC v3 3/6] sched/idle: Add a generic poll before enter real idle path
...q. I also test that the reschedule irq overlap by more than 90% (trace the need_resched status after cpuidle_idle_call), when I run ctxsw/netperf for one minute. as the overlap, I think I can input the last idle state's residency time to make decisions about probabilistic polling, as @dev->last_residency does. it is much easier to get data. 2. do a HV specific idle driver (function) so far, power management is not exposed to guest.. idle is simple for KVM guest, calling "sti" / "hlt"(cpuidle_idle_call() --> default_idle_call()).. thanks Xen guys, who has implemented t...
2017 Nov 17
0
[PATCH RFC v3 3/6] sched/idle: Add a generic poll before enter real idle path
...reschedule irq overlap by more than 90% (trace the > need_resched status after cpuidle_idle_call), when I run ctxsw/netperf for > one minute. > > as the overlap, I think I can input the last idle state's residency time > to make decisions about probabilistic polling, as @dev->last_residency does. > it is much easier to get data. That's only true for your particular use case. > > 2. do a HV specific idle driver (function) > > so far, power management is not exposed to guest.. idle is simple for KVM > guest, > calling "sti" / "hlt"(cp...
2017 Nov 16
1
[PATCH RFC v3 3/6] sched/idle: Add a generic poll before enter real idle path
On 2017-11-16 06:03, Thomas Gleixner wrote: > On Wed, 15 Nov 2017, Peter Zijlstra wrote: > >> On Mon, Nov 13, 2017 at 06:06:02PM +0800, Quan Xu wrote: >>> From: Yang Zhang <yang.zhang.wz at gmail.com> >>> >>> Implement a generic idle poll which resembles the functionality >>> found in arch/. Provide weak arch_cpu_idle_poll function which