Re: [PATCH] sched/fair: Prefer idle CPU to cache affinity

[Srikar Dronamraju]

* Peter Zijlstra <peterz@xxxxxxxxxxxxx> [2021-03-01 18:18:28]:

> On Mon, Mar 01, 2021 at 10:36:01PM +0530, Srikar Dronamraju wrote:
> > * Peter Zijlstra <peterz@xxxxxxxxxxxxx> [2021-03-01 16:44:42]:
> > 
> > > On Sat, Feb 27, 2021 at 02:56:07PM -0500, Rik van Riel wrote:
> > > > On Fri, 2021-02-26 at 22:10 +0530, Srikar Dronamraju wrote:
> > > 
 > > > 
> > > > Maybe we could use "tnr_busy * 4 <
> > > > tllc_size * 3" or
> > > > something like that?
> > > 
> > > How about:
> > > 
> > > 	tnr_busy < tllc_size / topology_max_smt_threads()
> > > 
> > > ?
> > 
> > Isn't topology_max_smt_threads only for x86 as of today?
> > Or Am I missing out?
> 
> Oh, could be, I didn't grep :/ We could have core code keep track of the
> smt count I suppose.

Could we use cpumask_weight(cpu_smt_mask(this_cpu)) instead?

-- 
Thanks and Regards
Srikar Dronamraju