linux-kernel - Re: [RFCv7 PATCH 03/10] sched: scheduler-driven cpu frequency selection

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 3 Mar 2016 09:34:54 +0000
From:	Juri Lelli <Juri.Lelli@....com>
To:	Steve Muckle <steve.muckle@...aro.org>
Cc:	"Rafael J. Wysocki" <rafael@...nel.org>,
	Michael Turquette <mturquette@...libre.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	Vincent Guittot <vincent.guittot@...aro.org>,
	Morten Rasmussen <morten.rasmussen@....com>,
	Dietmar Eggemann <dietmar.eggemann@....com>,
	Patrick Bellasi <patrick.bellasi@....com>,
	Ricky Liang <jcliang@...omium.org>
Subject: Re: [RFCv7 PATCH 03/10] sched: scheduler-driven cpu frequency
 selection

On 02/03/16 19:50, Steve Muckle wrote:
> On 03/02/2016 06:49 PM, Rafael J. Wysocki wrote:
> > I'm not actually sure if RT is the right answer here.  DL may be a
> > better choice.  After all, we want the thing to happen shortly, but
> > not necessarily at full speed.
> > 
> > So something like a DL workqueue would be quite useful here it seems.
> 
> The DL idea seems like a good one to me.
> 
> It would also prevent cpufreq changes from being delayed by other RT or
> DL tasks.
> 

Dimensioning period and runtime could require some experimenting, but
it's worth a try, I agree.

Best,

- Juri