Re: [Xen-devel] [PATCH RFC V6 0/11] Paravirtualized ticketlocks

2012-04-16 Thread Srivatsa Vaddagiri
* Ian Campbell [2012-04-16 17:36:35]: > > > The current pv-spinlock patches however does not track which vcpu is > > > spinning at what head of the ticketlock. I suppose we can consider > > > that optimization in future and see how much benefit it provides (over > > > plain yield/sleep the way i

Re: [Xen-devel] [PATCH RFC V6 0/11] Paravirtualized ticketlocks

2012-04-16 Thread Jeremy Fitzhardinge
On 04/16/2012 09:36 AM, Ian Campbell wrote: > On Mon, 2012-04-16 at 16:44 +0100, Konrad Rzeszutek Wilk wrote: >> On Sat, Mar 31, 2012 at 09:37:45AM +0530, Srivatsa Vaddagiri wrote: >>> * Thomas Gleixner [2012-03-31 00:07:58]: >>> I know that Peter is going to go berserk on me, but if we are r

Re: [Xen-devel] [PATCH RFC V6 0/11] Paravirtualized ticketlocks

2012-04-16 Thread Ian Campbell
On Mon, 2012-04-16 at 16:44 +0100, Konrad Rzeszutek Wilk wrote: > On Sat, Mar 31, 2012 at 09:37:45AM +0530, Srivatsa Vaddagiri wrote: > > * Thomas Gleixner [2012-03-31 00:07:58]: > > > > > I know that Peter is going to go berserk on me, but if we are running > > > a paravirt guest then it's simpl

Re: [Xen-devel] [PATCH RFC V6 0/11] Paravirtualized ticketlocks

2012-04-02 Thread Ian Campbell
On Fri, 2012-03-30 at 23:07 +0100, Thomas Gleixner wrote: > So if we need to fiddle with the scheduler and frankly that's the only > way to get a real gain (the numbers, which are achieved by this > patches, are not that impressive) then the question arises whether we > should turn the whole thing

Re: [Xen-devel] [PATCH RFC V6 0/11] Paravirtualized ticketlocks

2012-04-01 Thread Juergen Gross
On 03/31/2012 12:07 AM, Thomas Gleixner wrote: On Fri, 30 Mar 2012, H. Peter Anvin wrote: What is the current status of this patchset? I haven't looked at it too closely because I have been focused on 3.4 up until now... The real question is whether these heuristics are the correct approach o