Re: [v7 0/8] Reduce cross CPU IPI interference

[Frederic Weisbecker]

On Mon, Feb 06, 2012 at 12:19:44PM -0600, Christoph Lameter wrote:
> On Sun, 5 Feb 2012, Gilad Ben-Yossef wrote
> 
> >
> > Frederic has the latest version in a git tree here:
> >
> > git://github.com/fweisbec/linux-dynticks.git
> >        nohz/cpuset-v2-pre-20120117
> >
> > It's on top latest rcu/core.
> 
> Hmmm.. A pull vs upstream leads to lots of conflicts.

Yeah it's based on the latest rcu/core branch that was pulled
on last -rc1. Better git checkout it than pull.

 
> 
> > But the good news is that with these hacks applied I managed to run a 100%
> > CPU task  with  zero interrupts  (ticks or  otherwise) on an isolated cpu.
> 
> Cool.
> 
> > Disregarding TLB overhead, you get bare metal performance with Linux user
> > space manageability and  debug capabilities.  Pretty magical really: It's like
> > eating your cake and having it too :-)
> 
> We definitely need that.
> 
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