linux-arm-kernel.lists.infradead.org archive mirror
 help / color / mirror / Atom feed
From: ben@datarespons.no (Bjørn Erik Nilsen)
To: linux-arm-kernel@lists.infradead.org
Subject: imx6 power consumption
Date: Tue, 17 Dec 2013 19:28:27 +0100	[thread overview]
Message-ID: <mailman.18.1387304936.1056.linux-arm-kernel@lists.infradead.org> (raw)

Hi,

I have measured power consumption for imx6 in mem mode on the 3.12.4 mainstream kernel vs. 3.0.35 kernel from freescale/boundary devices. I noticed a significant increase going from 3.0 to 3.12 . I have at least identified one big difference: DDR is no longer tri-stated, which accounts for some of the difference.

I use 'echo mem > /sys/power/state' for my test case.

Do you know if someone is looking into this issue, or if there are pending patches somewhere?

Best regards,
Bj?rn Erik Nilsen

             reply	other threads:[~2013-12-17 18:28 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-12-17 18:28 Bjørn Erik Nilsen [this message]
     [not found] <E1VszO5-00060R-Gp@merlin.infradead.org>
2013-12-18  2:45 ` imx6 power consumption Shawn Guo
2013-12-18 11:12   ` Bjørn Erik Nilsen
     [not found]   ` <E1VtF3I-0002MQ-Ra@merlin.infradead.org>
2013-12-18 11:32     ` Shawn Guo
2013-12-19  2:28       ` Anson.Huang at freescale.com
2013-12-19  8:15         ` Bjørn Erik Nilsen
     [not found]         ` <1387440914.4131.4.camel@bnilsen-HP>
2014-01-29 16:17           ` Bjørn Erik Nilsen
     [not found]           ` <E1W8XqE-0000Ml-GE@merlin.infradead.org>
2014-01-29 16:21             ` Fabio Estevam
2014-01-29 16:33               ` Bjørn Erik Nilsen

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=mailman.18.1387304936.1056.linux-arm-kernel@lists.infradead.org \
    --to=ben@datarespons.no \
    --cc=linux-arm-kernel@lists.infradead.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).