For baremetal we continue to have 'fully fair ticketlock' with this patch
series.
But but but, we're looking at removing ticket locks. So why do we want
to invest in them now?
I have nothing against qspinlock. I am happy to test it/add any bit to
it if I could.
With this patch we get exc
On Tue, Jul 01, 2014 at 03:14:09PM +0530, Raghavendra K T wrote:
> On 07/01/2014 01:35 PM, Peter Zijlstra wrote:
> >On Sat, Jun 28, 2014 at 02:47:04PM +0530, Raghavendra K T wrote:
> >>In virtualized environment there are mainly three problems
> >>related to spinlocks that affects performance.
> >>
On 07/01/2014 01:35 PM, Peter Zijlstra wrote:
On Sat, Jun 28, 2014 at 02:47:04PM +0530, Raghavendra K T wrote:
In virtualized environment there are mainly three problems
related to spinlocks that affects performance.
1. LHP (lock holder preemption)
2. Lock Waiter Preemption (LWP)
3. Starvation/f
On Sat, Jun 28, 2014 at 02:47:04PM +0530, Raghavendra K T wrote:
> In virtualized environment there are mainly three problems
> related to spinlocks that affects performance.
> 1. LHP (lock holder preemption)
> 2. Lock Waiter Preemption (LWP)
> 3. Starvation/fairness
>
> Though Ticketlocks solve f
In virtualized environment there are mainly three problems
related to spinlocks that affects performance.
1. LHP (lock holder preemption)
2. Lock Waiter Preemption (LWP)
3. Starvation/fairness
Though Ticketlocks solve fairness problem it worsens LWP, LHP problems. Though
pv-ticketlocks tried to ad
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