On 31/07/15 12:41, Stefano Stabellini wrote:
> On Fri, 31 Jul 2015, Julien Grall wrote:
>> Hi David,
>>
>> On 31/07/15 11:52, David Vrabel wrote:
>>> On 31/07/15 11:45, David Vrabel wrote:
Instead of cpu_relax() while spinning and observing the ticket head,
introduce spin_relax() which ex
On Fri, 2015-07-31 at 12:41 +0100, Stefano Stabellini wrote:
> On Fri, 31 Jul 2015, Julien Grall wrote:
> > Hi David,
> >
> > On 31/07/15 11:52, David Vrabel wrote:
> > > On 31/07/15 11:45, David Vrabel wrote:
> > > > Instead of cpu_relax() while spinning and observing the ticket
> > > > head,
>
On Fri, 31 Jul 2015, Julien Grall wrote:
> Hi David,
>
> On 31/07/15 11:52, David Vrabel wrote:
> > On 31/07/15 11:45, David Vrabel wrote:
> >> Instead of cpu_relax() while spinning and observing the ticket head,
> >> introduce spin_relax() which executes a WFE instruction. After the
> >> ticket
Hi David,
On 31/07/15 11:52, David Vrabel wrote:
> On 31/07/15 11:45, David Vrabel wrote:
>> Instead of cpu_relax() while spinning and observing the ticket head,
>> introduce spin_relax() which executes a WFE instruction. After the
>> ticket head is changed call spin_signal() to execute an SVE
>>
On 31/07/15 11:45, David Vrabel wrote:
> Instead of cpu_relax() while spinning and observing the ticket head,
> introduce spin_relax() which executes a WFE instruction. After the
> ticket head is changed call spin_signal() to execute an SVE
> instruction to wake any spinners.
>
> This should impr
On 31/07/15 11:45, David Vrabel wrote:
> Instead of cpu_relax() while spinning and observing the ticket head,
> introduce spin_relax() which executes a WFE instruction. After the
> ticket head is changed call spin_signal() to execute an SVE
> instruction to wake any spinners.
>
> This should impro
Instead of cpu_relax() while spinning and observing the ticket head,
introduce spin_relax() which executes a WFE instruction. After the
ticket head is changed call spin_signal() to execute an SVE
instruction to wake any spinners.
This should improve power consumption when locks are contented and
