[LITMUS^RT] Import Cairo

Wed Jan 4 23:38:51 CET 2017

Hi Guys,

I am trying to use the st-draw tool but the cairo module is not present. (

ImportError: No module named cairo)

I tried to install it but to no avail till now.

Do you have a tip how to install this module?

Thanks in advance,

Lampros

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Today's Topics:

   1. Kernel Error (lambros bersentes)
   2. Re: Kernel Error (Meng Xu)

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Message: 1
Date: Sat, 31 Dec 2016 19:04:29 +0000
From: lambros bersentes <lambrosbersentes118 at hotmail.com>
To: "litmus-dev at lists.litmus-rt.org" <litmus-dev at lists.litmus-rt.org>
Subject: [LITMUS^RT] Kernel Error
Message-ID:
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Hi all,

Thanks Bjorn for your reply.

Well , i followed the instructions for installing the kernel first with following commands :

1. make menuconfig
2. make bzImage
3. make modules

What i find pretty peculiar is that after the installation of the modules i had to create manually following folders:
/proc/litmus and /dev/litmus which i placed under liblitmus folder.

My question is , am I supposed to do that or during the installation procedure these 2 folders should have been constructed automatically.

? do have this file structure as you suggested in your email but i still get errors running some tools under liblitmus.

Trying for example to run a task with the command rtspin 10 100 4  I get following error :

init_kernel_iface: cannot open LITMUS^RT control page (No such file or directory)
could not setup rt task params: Function not implemented

My device has following kernel:

uname --all

Linux labros-Qosmio-F60 4.4.0-57-generic #78-Ubuntu SMP Fri Dec 9 23:50:32 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

I installed all the folders (rt_linux, liblitmus , ft-tools) under Desktop.

How can I use the tools under liblitmus and ft-tools without having these incompatibilities?

Thanks in advance,
Lampros

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Message: 2
Date: Sat, 31 Dec 2016 14:28:27 -0500
From: Meng Xu <xumengpanda at gmail.com>
To: litmus-dev at lists.litmus-rt.org
Subject: Re: [LITMUS^RT] Kernel Error
Message-ID:
        <CAENZ-+=Kyfi-wmprB7T=ZPR9nG0TbEWYcRip4FtXjbP+SM-uQA at mail.gmail.com>
Content-Type: text/plain; charset=UTF-8

On Sat, Dec 31, 2016 at 2:04 PM, lambros bersentes
<lambrosbersentes118 at hotmail.com> wrote:
> Hi all,
>
> Thanks Bjorn for your reply.
>
> Well , i followed the instructions for installing the kernel first with
> following commands :
>
> 1. make menuconfig
> 2. make bzImage
> 3. make modules

You have to install the kernel by
sudo make modules_install install

You also need to boot into litmus.

>
> What i find pretty peculiar is that after the installation of the modules i
> had to create manually following folders:
> /proc/litmus and /dev/litmus which i placed under liblitmus folder.

This will be created if you boot in litmus.

>
> My question is , am I supposed to do that or during the installation
> procedure these 2 folders should have been constructed automatically.
>
> ? do have this file structure as you suggested in your email but i still get
> errors running some tools under liblitmus.
>
> Trying for example to run a task with the command rtspin 10 100 4  I get
> following error :
>
> init_kernel_iface: cannot open LITMUS^RT control page (No such file or
> directory)
> could not setup rt task params: Function not implemented

Two reasons:
1) It's not booted in LITMUS
2) You should run under root user or sudo privilege.

>
> My device has following kernel:
>
> uname --all
>
> Linux labros-Qosmio-F60 4.4.0-57-generic #78-Ubuntu SMP Fri Dec 9 23:50:32
> UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

This confirmed it's not running LITMUS kernel.

>
> I installed all the folders (rt_linux, liblitmus , ft-tools) under Desktop.
>
> How can I use the tools under liblitmus and ft-tools without having these
> incompatibilities?

Please check LITMUS's wiki about how to install the kernel.
If you followed it step by step, you should be able to do it very easily.

Best,

Meng

>
> Thanks in advance,
> Lampros
>
>
>
>
>
>
>
>
>
>
> _______________________________________________
> litmus-dev mailing list
> litmus-dev at lists.litmus-rt.org
> https://lists.litmus-rt.org/listinfo/litmus-dev
>

--
-----------
Meng Xu
PhD Student in Computer and Information Science
University of Pennsylvania
http://www.cis.upenn.edu/~mengxu/
Biography - University of Pennsylvania<http://www.cis.upenn.edu/~mengxu/>
www.cis.upenn.edu
I received the Master of Scinece in Engineering in Computer and Information Science at University of Pennsylvania in May 2013 and the Bachelor in Software Engineering ...

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