i.MX ProcessorsのトピックRe: Powertop for Linux / Android

Powertop for Linux / Android

kyke — Wed, 05 Nov 2014 20:35:07 GMT

Hi,

I am working with a i.MX6 based board running Android 4.3. I would like to install powertop:

- Has anyone had success doing this?

- Could someone provide some step-by-step guide?

- If not, does imx6 have similar tools?

I had use powerdebug to control clock gates but it seems a bit limited. I am up for any recommendations / tools you can provide me,

Enrique

Re: Powertop for Linux / Android

jimmychan — Thu, 06 Nov 2014 03:53:01 GMT

Have you try to build the source code simply by using the ARM cross compiler?

for example :

ARCH=arm

CROSS_COMPILE=/opt/freescale/usr/local/gcc-4.6.2-glibc-2.13-linaro-multilib-2011.12/fsllinaro-toolchain/bin/arm-none-linux-gnueabi- (which is the path of the toolchain)

then 'make' the source code.

Re: Powertop for Linux / Android

kyke — Thu, 06 Nov 2014 22:31:55 GMT

I hope it was as easy, But I need to build the dependencies and I don't know why the "libncurses" is giving me a lot of problems. Every time I try to build I get this problem,

make: *** No rule to make target `out/target/product/udoo/obj/STATIC_LIBRARIES/libncurses_intermediates/export_includes', needed by `out/target/product/udoo/obj/EXECUTABLES/powertop_intermediates/import_includes'.

I don't know how to fixed it. I had download the library for Android and tried to built in from the external folder, but seems that doesn't work.

Thank you for your help anyway,

Enrique.

Re: Powertop for Linux / Android

jimmychan — Fri, 07 Nov 2014 04:39:17 GMT

My host is Ubuntu 14.04.

according to the README, some dependencies are needed, so I install them in my host.

$ sudo apt-get install -y ncurses-dev libnl-dev

Then export the ARCH and CC:

$export ARCH=ARM

$export CROSS_COMPILE=~/myandroid/prebuilts/gcc/linux-x86/arm/arm-eabi-4.6/bin/arm-eabi-

Then build the powertop without error.

Re: Powertop for Linux / Android

kyke — Mon, 10 Nov 2014 17:19:24 GMT

Thank you for your useful answers jimmy, it could build powertop,

But now, I am having problems to include the files build in the Android kernel. I had tried to copy everything and execute :

./powertop

but I got this error:

/system/bin/sh: ./powertop: not executable: magic 7F45

Seems it's not recognized as a executable. Do you have any idea about this kind of error and/or how to fix it?

Thank you,

Enrique

Re: Powertop for Linux / Android

jimmychan — Tue, 11 Nov 2014 02:22:10 GMT

Did you try 'chmod' to change it to executable?

Re: Powertop for Linux / Android

kyke — Tue, 11 Nov 2014 15:34:28 GMT

I saw their permission, and it has execution permission (for all user levels), the problem is the system itself it's not identifying it as an executable, so it doesn't really cares about if it has permission or not.

For what I read on internet, this is a problem with Android linux kernel, most of the time caused by some missing dependencies and problems with the two first bytes..