From: Waiman Long
> Sent: 30 December 2023 15:57
>
> On 12/29/23 22:13, Waiman Long wrote:
> >
> > On 12/29/23 15:58, David Laight wrote:
> >> The vcpu_is_preempted() test stops osq_lock() spinning if a virtual
> >> cpu is no longer running.
> >> Although patched out for bare-metal the code
On 12/29/23 22:13, Waiman Long wrote:
On 12/29/23 15:58, David Laight wrote:
The vcpu_is_preempted() test stops osq_lock() spinning if a virtual
cpu is no longer running.
Although patched out for bare-metal the code still needs the cpu number.
Reading this from 'prev->cpu' is a pretty much
On 12/29/23 15:58, David Laight wrote:
The vcpu_is_preempted() test stops osq_lock() spinning if a virtual
cpu is no longer running.
Although patched out for bare-metal the code still needs the cpu number.
Reading this from 'prev->cpu' is a pretty much guaranteed have a cache miss
when
The vcpu_is_preempted() test stops osq_lock() spinning if a virtual
cpu is no longer running.
Although patched out for bare-metal the code still needs the cpu number.
Reading this from 'prev->cpu' is a pretty much guaranteed have a cache miss
when osq_unlock() is waking up the next cpu.
Instead
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