From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eduardo Valentin Subject: Re: [RFP] LPC thermal track Date: Mon, 30 Mar 2015 13:51:04 -0700 Message-ID: <20150330205057.GA5545@localhost.localdomain> References: <20150327000245.GA29752@developer.hsd1.ca.comcast.net> <55154361.90302@arm.com> <1427742677.23036.145.camel@spandruv-DESK3.jf.intel.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="UugvWAfsgieZRqgk" Return-path: Received: from mail-pa0-f43.google.com ([209.85.220.43]:34802 "EHLO mail-pa0-f43.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753719AbbC3UvI (ORCPT ); Mon, 30 Mar 2015 16:51:08 -0400 Received: by pactp5 with SMTP id tp5so11533059pac.1 for ; Mon, 30 Mar 2015 13:51:07 -0700 (PDT) Content-Disposition: inline In-Reply-To: <1427742677.23036.145.camel@spandruv-DESK3.jf.intel.com> Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: Srinivas Pandruvada Cc: Linux PM , Rui Zhang , Javi Merino , "cyndis@lakka.kapsi.fi" , Kapileshwar Singh , "l.majewski@samsung.com" , "geert+renesas@glider.be" , "wxt@rock-chips.com" , Punit Agrawal --UugvWAfsgieZRqgk Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hey Srinivas, On Mon, Mar 30, 2015 at 12:11:17PM -0700, Srinivas Pandruvada wrote: > On Fri, 2015-03-27 at 11:47 +0000, Punit Agrawal wrote:=20 > > Hi Eduardo, > >=20 > > Thanks for proposing a thermal micro-conference. It would be good to=20 > > discuss the direction things are heading with regards to thermal in lin= ux. > >=20 > > On 27/03/15 00:02, Eduardo Valentin wrote: > > > Hello all, > > > > > > I've created a proposal for a thermal microconference track on the LPC > > > 2015 [1]. The basic idea is to get thermal developers together and > > > discuss the thermal role within the Linux environment, from kernel and > > > userspace perspective. > > > > > > A initial proposal for the topics to be discussed are: > > > . Closed loop control governors > > > . Sensor API > > > . Thermal class: split of temperature sensor device and thermal driver > > > . Improvements on OF-thermal > > > . Devfreq vs. clock cooling > > > . Power model based policies > > > . User space tools > > > . User space governors > > > > > > If you have interest, or if you have ideas on how to improve the > > > framework, reply to this email and add it to the wiki. > What about > Some enhancement in thermal zone user space I/F for user space thermal > controllers > - Better support for virtual temperature sensors which depends on other > sensors.=20 > - Support for Linux IIO style scale and offset in thermal zone > temperature calculation. > - /dev interface for pushing thermal samples instead of raw read of > temperature to improve performances and push sample instead of pull from > user space. Can you please add these topics to the wiki? Would you be able to attend LPC and give a talk about your thoughts? BR, Eduardo Valentin >=20 > Thanks, > Srinivas=20 > > > > >=20 > > I'd like to propose - > >=20 > > . Co-ordination among cooling-devices in the system > >=20 > > In workloads that involve multiple devices such as camera+CPUs+image=20 > > singal processor or camera+video encoding, etc. often there are=20 > > dependencies across multiple devices' performance states to achieve=20 > > minimum acceptable performance (24fps HD encode for example). When=20 > > thermally constrained it would help to have some mechanisms to=20 > > co-ordinate their performance control. The power allocator governor=20 > > attempts to solve some of these problems but it would be good to have a= =20 > > wider discussion on enabling more scenarios. > >=20 > >=20 > > > Add your name in the list of participants as well. Also, if you feel > > > like giving a talk on the topic, let's add it to the topic list. > > > > >=20 > > Done. > >=20 > > Cheers, > > Punit > >=20 > > > Currently I am simple checking what would be the level of interest to > > > have this topic as a LPC microconference. > > > > > > BR, > > > > > > Eduardo Valentin > > > > > > > > > [1] - http://wiki.linuxplumbersconf.org/2015:thermal > > > > >=20 >=20 >=20 --UugvWAfsgieZRqgk Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJVGbcxAAoJEMLUO4d9pOJWgH8H/iV4N1R2bJTXIpMIN333JCCZ woLFp1dUXMdQTcjaOJI8eVqvSYcABiBiE3gO99/LeZMozduHZ0kOwZrR1dsSAagG /luw33dsp8ImdUWckvSgn6v5/GApsiLiAX1/V7NJ9MIekiC0lDdyUGgT36Oli2FM Nh05WgEVdQUpC2F/QJcBb6nuiWucLARjUbptwAD2nPi4ADk8pp2+Ixi60q5ANVJ6 j0efz2f0xFI+bNGUrWY5mlbGHI5dCeFOuBehcmWPLxGTbKUqwRriwF0xAz1d8iC8 xYvQ8KQRsGp6OYn6kHPRDVeXac77ekoJwDhut/bcmKDUeIxY/ScAP8wuFP7ZV+g= =dS7O -----END PGP SIGNATURE----- --UugvWAfsgieZRqgk--