Re: [patch 2/2] MM: allow per-cpu vmstat_threshold and vmstat_worker configuration

[Marcelo Tosatti]

On Mon, May 22, 2017 at 11:38:02AM -0500, Christoph Lameter wrote:
> On Sat, 20 May 2017, Marcelo Tosatti wrote:
> 
> > > And you can configure the interval of vmstat updates freely.... Set
> > > the vmstat_interval to 60 seconds instead of 2 for a try? Is that rare
> > > enough?
> >
> > Not rare enough. Never is rare enough.
> 
> Ok what about the other stuff that must be going on if you allow OS
> activity like f.e. the tick, scheduler etc etc.

Yes these are also problems... but we're either getting rid of them or
reducing their impact as much as possible.

vmstat_update is one member of the problematic set.

I'll get you the detailed IPI measures, hold on...