Re: fast path cycle muncher (vmstat: make vmstat_updater deferrable again and shut down on idle)

From: Christoph Lameter
Date: Tue Jan 26 2016 - 11:26:15 EST

On Tue, 26 Jan 2016, Mike Galbraith wrote:

> > Why would the deferring cause this overhead?
> Because we schedule to idle cores aggressively, thus we may pop in and
> out of idle at high frequency.

Whats the point of going idle if you have things to do soon?