On 1/18/2016 11:07 AM, Meng Xu wrote:
On Mon, Jan 18, 2016 at 6:00 AM, Dario Faggioli
wrote:
On Mon, 2016-01-18 at 10:47 +, George Dunlap wrote:
On Fri, Jan 15, 2016 at 1:04 AM, Tianyang Chen
If an idle vcpu is picked, the ret.time is set accordingly in both
credit
and credit2 by che
Hi Dario,
On Mon, Jan 18, 2016 at 11:32 AM, Dario Faggioli
wrote:
> On Mon, 2016-01-18 at 11:07 -0500, Meng Xu wrote:
>> On Mon, Jan 18, 2016 at 6:00 AM, Dario Faggioli
>> wrote:
>> >
>> > RTDS behavior is broken in many respect, including this,
>> >
>> > and in fact,
>> > Meng and Tianyang are
On Mon, 2016-01-18 at 11:07 -0500, Meng Xu wrote:
> On Mon, Jan 18, 2016 at 6:00 AM, Dario Faggioli
> wrote:
> >
> > RTDS behavior is broken in many respect, including this,
> >
> > and in fact,
> > Meng and Tianyang are sending patches already to fix it (I'll let
> > you
> > guys have my commen
On Mon, Jan 18, 2016 at 6:00 AM, Dario Faggioli
wrote:
>
> On Mon, 2016-01-18 at 10:47 +, George Dunlap wrote:
> > On Fri, Jan 15, 2016 at 1:04 AM, Tianyang Chen
> >
> > > If an idle vcpu is picked, the ret.time is set accordingly in both
> > > credit
> > > and credit2 by checking whether sne
On Mon, 2016-01-18 at 12:37 +, George Dunlap wrote:
> On Mon, Jan 18, 2016 at 11:00 AM, Dario Faggioli
> wrote:
> > >
> > Credit2, AFAICR, could also avoid _always_ re-setting the timer,
> > but it
> > does need to do that at least a few times, even when idle is
> > selected,
> > because of t
On Mon, Jan 18, 2016 at 11:00 AM, Dario Faggioli
wrote:
>> It looks like credit2's behavior will probably prevent the processor
>> from going into deeper power-saving states, and rtds' behavior might
>> cause it to essentially busy-wait.
>>
> RTDS behavior is broken in many respect, including this
On Mon, 2016-01-18 at 10:47 +, George Dunlap wrote:
> On Fri, Jan 15, 2016 at 1:04 AM, Tianyang Chen
>
> > If an idle vcpu is picked, the ret.time is set accordingly in both
> > credit
> > and credit2 by checking whether snext is idle. if so, credit
> > returns -1 and
> > credit2 returns 2ms.
On Fri, Jan 15, 2016 at 1:04 AM, Tianyang Chen wrote:
> Hello,
>
> I'm confused by the use of idle_vcpu[] in Xen schedulers. In credit, credit2
> and rtds schedulers, they are used in conjunction with variable
> "tasklet_work_scheduled" like this:
>
> if ( tasklet_work_scheduled )
> {
> snext
Hello,
I'm confused by the use of idle_vcpu[] in Xen schedulers. In credit,
credit2 and rtds schedulers, they are used in conjunction with variable
"tasklet_work_scheduled" like this:
if ( tasklet_work_scheduled )
{
snext = #_VCPU(idle_vcpu[cpu]);
}
The idle_vcpu array is initia
