linux-kernel - Re: [patch 2/2] MM: allow per-cpu vmstat_threshold and vmstat

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Message-ID: <alpine.DEB.2.20.1705221137001.12282@east.gentwo.org>
Date:   Mon, 22 May 2017 11:38:02 -0500 (CDT)
From:   Christoph Lameter <cl@...ux.com>
To:     Marcelo Tosatti <mtosatti@...hat.com>
cc:     Luiz Capitulino <lcapitulino@...hat.com>,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Rik van Riel <riel@...hat.com>,
        Linux RT Users <linux-rt-users@...r.kernel.org>,
        cmetcalf@...lanox.com
Subject: Re: [patch 2/2] MM: allow per-cpu vmstat_threshold and vmstat_worker
 configuration

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.