linux-kernel - Re: [RFC PATCH] timer: Improve itimers scalability

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Date:	Wed, 5 Aug 2015 11:24:51 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Jason Low <jason.low2@...com>
Cc:	Ingo Molnar <mingo@...nel.org>, linux-kernel@...r.kernel.org,
	Frederic Weisbecker <fweisbec@...il.com>,
	Oleg Nesterov <oleg@...hat.com>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Davidlohr Bueso <dave@...olabs.net>,
	Mike Galbraith <umgwanakikbuti@...il.com>, terry.rudd@...com,
	Rik van Riel <riel@...hat.com>,
	Waiman Long <Waiman.Long@...com>,
	Scott J Norton <scott.norton@...com>
Subject: Re: [RFC PATCH] timer: Improve itimers scalability

On Tue, Aug 04, 2015 at 05:29:44PM -0700, Jason Low wrote:
> When running a database workload on a 16 socket machine, there were
> scalability issues related to itimers.

I very much hope you're also trying to convince the relevant database
people that using process wide timers on something they expect to scale
is a horrendously stupid idea?


Nothing obviously broken stood out, but *shees* :-)
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