linux-arm-kernel.lists.infradead.org archive mirror
 help / color / mirror / Atom feed
From: embed3d@gmail.com (Philipp Rossak)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC PATCH] ARM: configs: sunxi: Set ondemand govenor as default
Date: Sat, 17 Feb 2018 15:22:35 +0100	[thread overview]
Message-ID: <20180217142235.28541-1-embed3d@gmail.com> (raw)

Right now the performance govenor is the default frequency govenor on
sunxi devices. This causes some general problems.
When the cpu is idle the cpu runs with its maximum frequency.
This causes a higher cpu temperature in the idle state. When the cpu is
now under load the cpu gets with that higher idle temperature now faster
to its thermal limits.
An other big problem of the performace govenor is the missing
thermal throttling. Some tests with cpuburn resulted in a system crash
when the soc reached its thermal limits since no thermal throttling
occurred.

With this patch we set the default frequency govenor to ondemand mode
and reduce the temperature when the cpu is idle and activate the thermal
throtteling.

Signed-off-by: Philipp Rossak <embed3d@gmail.com>
---
 arch/arm/configs/sunxi_defconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/configs/sunxi_defconfig b/arch/arm/configs/sunxi_defconfig
index df433abfcb02..e5812851091c 100644
--- a/arch/arm/configs/sunxi_defconfig
+++ b/arch/arm/configs/sunxi_defconfig
@@ -14,6 +14,7 @@ CONFIG_CMA=y
 CONFIG_ARM_APPENDED_DTB=y
 CONFIG_ARM_ATAG_DTB_COMPAT=y
 CONFIG_CPU_FREQ=y
+CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y
 CONFIG_CPUFREQ_DT=y
 CONFIG_VFP=y
 CONFIG_NEON=y
-- 
2.11.0

             reply	other threads:[~2018-02-17 14:22 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-02-17 14:22 Philipp Rossak [this message]
2018-02-19  8:10 ` [RFC PATCH] ARM: configs: sunxi: Set ondemand govenor as default Maxime Ripard
2018-02-26 21:29   ` Philipp Rossak
2018-02-27  7:12     ` Maxime Ripard

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=20180217142235.28541-1-embed3d@gmail.com \
    --to=embed3d@gmail.com \
    --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).