Re: [Xen-devel] [PATCH RFC V8 0/17] Paravirtualized ticket spinlocks

[Nikunj A Dadhania <nikunj@xxxxxxxxxxxxxxxxxx>]

On Mon, 7 May 2012 22:42:30 +0200 (CEST), Thomas Gleixner <tglx@xxxxxxxxxxxxx> 
wrote:
> On Mon, 7 May 2012, Ingo Molnar wrote:
> > * Avi Kivity <avi@xxxxxxxxxx> wrote:
> > 
> > > > PS: Nikunj had experimented that pv-flush tlb + 
> > > > paravirt-spinlock is a win on PLE where only one of them 
> > > > alone could not prove the benefit.
> > > 
Do not have PLE numbers yet for pvflush and pvspinlock. 

I have seen on Non-PLE having pvflush and pvspinlock patches -
kernbench, ebizzy, specjbb, hackbench and dbench all of them improved. 

I am chasing a race currently on pv-flush path, it is causing
file-system corruption. I will post these number along with my v2 post.

> > > I'd like to see those numbers, then.
> > > 
> > > Ingo, please hold on the kvm-specific patches, meanwhile.
> > 
> > I'll hold off on the whole thing - frankly, we don't want this 
> > kind of Xen-only complexity. If KVM can make use of PLE then Xen 
> > ought to be able to do it as well.
> > 
> > If both Xen and KVM makes good use of it then that's a different 
> > matter.
> 
> Aside of that, it's kinda strange that a dude named "Nikunj" is
> referenced in the argument chain, but I can't find him on the CC list.
> 
/me waves my hand

Regards
Nikunj


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